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java.lang.Object org.hsqldb.jdbc.jdbcConnection
A connection (session) with a specific database. Within the context of a Connection, SQL statements are executed and results are returned.
A Connection's database is able to provide information describing
its tables, its supported SQL grammar, its stored procedures, the
capabilities of this connection, and so on. This information is
obtained with the getMetaData
method.
Note: By default the Connection automatically commits changes after executing each statement. If auto commit has been disabled, an explicit commit must be done or database changes will not be saved.
To get a Connection
to an HSQLDB database, the
following code may be used (updated to reflect the most recent
recommendations):
Since 1.7.2, connection properties (<key-value-pairs>) may be appended to the database connection <url>, using the form:
'<url>[;key=value]*'
Also since 1.7.2, the allowable forms of the HSQLDB database connection <url> have been extended. However, all legacy forms continue to work, with unchanged semantics. The extensions are as described in the following material.
The 1.7.2 Server
database connection <url> has
changed to take one of the two following forms:
The 1.7.2 WebServer
database connection <url>
also changes to take one of two following forms:
In both network server database connection <url> forms, the optional <alias> component is used to identify one of possibly several database instances available at the indicated host and port. If the <alias> component is omitted, then a connection is made to the network server's default database instance.
For more information on server configuration regarding mounting multiple
databases and assigning them <alias> values, please read the
Java API documentation for Server
and related
chapters in the general documentation, especially the Advanced Users
Guide.
The 1.7.2 100% in-memory (transient, in-process) database connection <url> takes one of the two following forms:
With the 1.7.2 transient, in-process database connection <url>, the <alias> component is the key used to look up a transient, in-process database instance amongst the collection of all such instances already in existence within the current class loading context in the current JVM. If no such instance exists, one may be automatically created and mapped to the <alias>, as governed by the 'ifexists=true|false' connection property.
The 1.7.2 standalone (persistent, in-process) database connection <url> takes one of the three following forms:
For the persistent, in-process database connection <url>, the <path> component is the path prefix common to all of the files that compose the database.
As of 1.7.2, although other files may be involved (such as transient working files and/or TEXT table CSV data source files), the essential set that may, at any particular point in time, compose an HSQLDB database are:
For example: 'jdbc:hsqldb:file:test' connects to a database composed of some subset of the files listed above, where the expansion of <path> is 'test' prefixed with the path of the working directory fixed at the time the JVM is started.
Under Windows TM , 'jdbc:hsqldb:file:c:\databases\test' connects to a database located on drive 'C:' in the directory 'databases', composed of some subset of the files:
C:\ +--databases\ +--test.properties +--test.script +--test.log +--test.data +--test.backup +--test.lckUnder most variations of UNIX, 'jdbc:hsqldb:file:/databases/test' connects to a database located in the directory 'databases' directly under root, once again composed of some subset of the files:
/ +--databases/ +--test.properties +--test.script +--test.log +--test.data +--test.backup +--test.lckSome Guidelines:
Note: Versions of HSQLDB previous to 1.7.0 did not support creating directories along the file path specified in the persistent, in-process mode database connection <url> form, in the case that they did not already exist. Starting with HSQLDB 1.7.0, directories will be created if they do not already exist., but only if HSQLDB is built under a version of the compiler greater than JDK 1.1.x.
res: Connections
The new 'jdbc:hsqldb:res:<path>' database connection <url> has different semantics than the 'jdbc:hsqldb:file:<path>' form. The semantics are similar to those of a 'files_readonly' database, but with some additional points to consider.
Specifically, the '<path>' component of a res: type database connection <url> is used to obtain resource URL objects and thereby read the database files as resources on the class path. Moreover, the URL objects must point only to resources contained in one or more jars on the class path (must be jar protocol).
This restriction is enforced to avoid the unfortunate situation in which, because res: database instances do not create a <path>.lck file (they are strictly files-read-only) and because the <path> components of res: and file: database URIs are not checked for file system equivalence, it is possible for the same database files to be accessed concurrently by both file: and res: database instances. That is, without this restriction, it is possible that <path>.data and <path>.properties file content may be written by a file: database instance without the knowlege or cooperation of a res: database instance open on the same files, potentially resulting in unexpected database errors, inconsistent operation and/or data corruption.
In short, a res: type database connection <url> is designed specifically to connect to a 'files_in_jar' mode database instance, which in turn is designed specifically to operate under Java WebStartTM and Java AppletTMconfigurations, where co-locating the database files in the jars that make up the WebStart application or Applet avoids the need for special security configuration or code signing.
Note: Since it is difficult and often nearly impossible to determine or control at runtime from where all classes are being loaded or which class loader is doing the loading under 'files_in_jar' semantics, the <path> component of the res: database connection <url> is always taken to be relative to the default package. That is, if the <path> component does not start with '/', then '/' is prepended when obtaining the resource URLs used to read the database files.
In general, JDBC 2 support requires Java 1.2 and above, and JDBC3 requires Java 1.4 and above. In HSQLDB, support for methods introduced in different versions of JDBC depends on the JDK version used for compiling and building HSQLDB.
Since 1.7.0, it is possible to build the product so that
all JDBC 2 methods can be called while executing under the version 1.1.x
Java Runtime EnvironmentTM.
However, in addition to this technique requiring explicit casts to the
org.hsqldb.jdbcXXX classes, some of the method calls also require
int
values that are defined only in the JDBC 2 or greater
version of
ResultSet
interface. For this reason, when the
product is compiled under JDK 1.1.x, these values are defined
in jdbcResultSet
.
In a JRE 1.1.x environment, calling JDBC 2 methods that take or return the
JDBC2-only ResultSet
values can be achieved by referring
to them in parameter specifications and return value comparisons,
respectively, as follows:
jdbcResultSet.FETCH_FORWARD jdbcResultSet.TYPE_FORWARD_ONLY jdbcResultSet.TYPE_SCROLL_INSENSITIVE jdbcResultSet.CONCUR_READ_ONLY // etc.However, please note that code written to use HSQLDB JDBC 2 features under JDK 1.1.x will not be compatible for use with other JDBC 2 drivers. Please also note that this feature is offered solely as a convenience to developers who must work under JDK 1.1.x due to operating constraints, yet wish to use some of the more advanced features available under the JDBC 2 specification.
jdbcDriver
,
jdbcStatement
,
jdbcPreparedStatement
,
jdbcCallableStatement
,
jdbcResultSet
,
jdbcDatabaseMetaData
| Field Summary |
| Fields inherited from interface java.sql.Connection |
TRANSACTION_NONE, TRANSACTION_READ_COMMITTED, TRANSACTION_READ_UNCOMMITTED, TRANSACTION_REPEATABLE_READ, TRANSACTION_SERIALIZABLE |
| Constructor Summary | |
jdbcConnection(org.hsqldb.persist.HsqlProperties props)
Constructs a new external Connection to an HSQLDB
Database . |
|
jdbcConnection(org.hsqldb.Session c)
Constructs an INTERNAL Connection ,
using the specified Session . |
| Method Summary | |
void |
clearWarnings()
Clears all warnings reported for this Connection
object. |
void |
close()
Releases this Connection
object's database and JDBC resources immediately instead of
waiting for them to be automatically released. |
void |
commit()
Makes all changes made since the previous commit/rollback permanent and releases any database locks currently held by the Connection. |
java.sql.Statement |
createStatement()
Creates a Statement
object for sending SQL statements to the database. |
java.sql.Statement |
createStatement(int type,
int concurrency)
Creates a Statement object that will generate
ResultSet objects with the given type and
concurrency. |
java.sql.Statement |
createStatement(int resultSetType,
int resultSetConcurrency,
int resultSetHoldability)
Creates a Statement
object that will generate ResultSet objects with
the given type, concurrency, and holdability. |
boolean |
getAutoCommit()
Gets the current auto-commit state. |
java.lang.String |
getCatalog()
Returns the Connection's current catalog name. |
int |
getHoldability()
Retrieves the current holdability of ResultSet objects created using
this Connection object. |
java.sql.DatabaseMetaData |
getMetaData()
Gets the metadata regarding this connection's database. |
int |
getTransactionIsolation()
Retrieves this Connection
object's current transaction isolation level. |
java.util.Map |
getTypeMap()
Gets the type map object associated with this connection. |
java.sql.SQLWarning |
getWarnings()
Retrieves the first warning reported by calls on this Connection object. |
boolean |
isClosed()
Tests to see if a Connection is closed. |
boolean |
isReadOnly()
Tests to see if the connection is in read-only mode. |
java.lang.String |
nativeSQL(java.lang.String sql)
Converts the given SQL statement into the system's native SQL grammar. |
java.sql.CallableStatement |
prepareCall(java.lang.String sql)
Creates a CallableStatement
object for calling database stored procedures. |
java.sql.CallableStatement |
prepareCall(java.lang.String sql,
int resultSetType,
int resultSetConcurrency)
Creates a CallableStatement
object that will generate ResultSet objects with
the given type and concurrency. |
java.sql.CallableStatement |
prepareCall(java.lang.String sql,
int resultSetType,
int resultSetConcurrency,
int resultSetHoldability)
Creates a CallableStatement
object that will generate ResultSet objects with
the given type and concurrency. |
java.sql.PreparedStatement |
prepareStatement(java.lang.String sql)
Creates a PreparedStatement
object for sending parameterized SQL statements to the
database. |
java.sql.PreparedStatement |
prepareStatement(java.lang.String sql,
int autoGeneratedKeys)
Creates a default PreparedStatement
object that has the capability to retrieve auto-generated
keys. |
java.sql.PreparedStatement |
prepareStatement(java.lang.String sql,
int[] columnIndexes)
Creates a default PreparedStatement
object capable of returning the auto-generated keys designated
by the given array. |
java.sql.PreparedStatement |
prepareStatement(java.lang.String sql,
int type,
int concurrency)
Creates a PreparedStatement object that will
generate ResultSet objects with the given type
and concurrency. |
java.sql.PreparedStatement |
prepareStatement(java.lang.String sql,
int resultSetType,
int resultSetConcurrency,
int resultSetHoldability)
Creates a PreparedStatement
object that will generate ResultSet objects with
the given type, concurrency, and holdability. |
java.sql.PreparedStatement |
prepareStatement(java.lang.String sql,
java.lang.String[] columnNames)
Creates a default PreparedStatement
object capable of returning the auto-generated keys designated
by the given array. |
void |
releaseSavepoint(java.sql.Savepoint savepoint)
Removes the given Savepoint
object from the current transaction. |
void |
reset()
Resets this connection so it can be used again. |
void |
rollback()
Drops all changes made since the previous commit/rollback and releases any database locks currently held by this Connection. |
void |
rollback(java.sql.Savepoint savepoint)
Undoes all changes made after the given Savepoint object was set. |
void |
setAutoCommit(boolean autoCommit)
Sets this connection's auto-commit mode to the given state. |
void |
setCatalog(java.lang.String catalog)
Sets a catalog name in order to select a subspace of this Connection's database in which to work. |
void |
setHoldability(int holdability)
Changes the holdability of ResultSet objects created using this
Connection object to the given holdability. |
void |
setReadOnly(boolean readonly)
Puts this connection in read-only mode as a hint to enable database optimizations. |
java.sql.Savepoint |
setSavepoint()
Creates an unnamed savepoint in the current transaction and returns the new Savepoint
object that represents it. |
java.sql.Savepoint |
setSavepoint(java.lang.String name)
Creates a savepoint with the given name in the current transaction and returns the new Savepoint object that represents it. |
void |
setTransactionIsolation(int level)
Attempts to change the transaction isolation level for this Connection object to the one given. |
void |
setTypeMap(java.util.Map map)
Installs the given TypeMap
object as the type map for this Connection
object. |
| Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public jdbcConnection(org.hsqldb.persist.HsqlProperties props) throws java.sql.SQLException
Connection
to an HSQLDB
Database
.
This constructor is called on behalf of the
java.sql.DriverManager
when getting a
Connection
for use in normal (external)
client code.
Internal client code, that being code located in HSQLDB SQL
functions and stored procedures, receives an INTERNAL
connection constructed by the jdbcConnection(Session)
constructor.
props
- A Properties
object containing the connection
properties
java.sql.SQLException
- when the user/password combination is
invalid, the connection url is invalid, or the
Database
is unavailable.
The Database
may be unavailable for a number
of reasons, including network problems or the fact that it
may already be in use by another process.
public jdbcConnection(org.hsqldb.Session c) throws org.hsqldb.HsqlException
INTERNAL
Connection
,
using the specified Session
.
This constructor is called only on behalf of an existing
Session
(the internal parallel of a
Connection
), to be used as a parameter to a SQL
function or stored procedure that needs to execute in the context
of that Session
.
When a Java SQL function or stored procedure is called and its
first parameter is of type Connection
, HSQLDB
automatically notices this and constructs an INTERNAL
Connection
using the current Session
.
HSQLDB then passes this Connection
in the first
parameter position, moving any other parameter values
specified in the SQL statement to the right by one position.
To read more about this, see Function#getValue()
.
Notes:
Starting with HSQLDB 1.7.2, INTERNAL
connections are not
closed by a call to close() or by a SQL DISCONNECT.
For HSQLDB developers not involved with writing database
internals, this change only applies to connections obtained
automatically from the database as the first parameter to
stored procedures and SQL functions. This is mainly an issue
to developers writing custom SQL function and stored procedure
libraries for HSQLDB. Presently, it is recommended that SQL function and
stored procedure code avoid depending on closing or issuing a
DISCONNECT on a connection obtained in this manner.
c
- the Session requesting the construction of this
Connection
org.hsqldb.HsqlException
- never (reserved for future use);Function
| Method Detail |
public java.sql.Statement createStatement() throws java.sql.SQLException
Statement
object for sending SQL statements to the database. SQL
statements without parameters are normally executed using
Statement
objects. If the same SQL statement is
executed many times, it may be more efficient to use a
PreparedStatement
object.
Result sets created using the returned Statement
object will by default be type TYPE_FORWARD_ONLY
and have a concurrency level of CONCUR_READ_ONLY
.
Starting with HSQLDB 1.7.2, support for precompilation at the engine level
has been implemented, so it is now much more efficient and performant
to use a PreparedStatement
object if the same SQL statement
is executed many times.
Up to 1.6.1, HSQLDB supported TYPE_FORWARD_ONLY
-
CONCUR_READ_ONLY
results only, so ResultSet
objects created using the returned Statement
object would always be type TYPE_FORWARD_ONLY
with CONCUR_READ_ONLY
concurrency.
Starting with 1.7.0, HSQLDB also supports
TYPE_SCROLL_INSENSITIVE
results.
Notes:
Up to 1.6.1, calling this method returned null
if the
connection was already closed. This was possibly counter-intuitive
to the expectation that an exception would be thrown for
closed connections. Starting with 1.7.0. the behaviour is to throw a
SQLException
if the connection is closed.
createStatement
in interface java.sql.Connection
java.sql.SQLException
- if a database access error occurscreateStatement(int,int)
,
createStatement(int,int,int)
public java.sql.PreparedStatement prepareStatement(java.lang.String sql) throws java.sql.SQLException
PreparedStatement
object for sending parameterized SQL statements to the
database.
A SQL statement with or without IN parameters can be
pre-compiled and stored in a PreparedStatement
object. This object can then be used to efficiently execute
this statement multiple times.
Note: This method is optimized for handling parametric
SQL statements that benefit from precompilation. If the driver
supports precompilation, the method prepareStatement
will send the statement to the database for precompilation.
Some drivers may not support precompilation. In this case, the
statement may not be sent to the database until the
PreparedStatement
object is executed. This has no
direct effect on users; however, it does affect which methods
throw certain SQLException
objects.
Result sets created using the returned PreparedStatement
object will by default be type TYPE_FORWARD_ONLY
and have a concurrency level of CONCUR_READ_ONLY
.
Starting with HSQLDB 1.7.2, support for precompilation at the engine level
has been implemented, so it is now much more efficient and performant
to use a PreparedStatement
object if the same SQL statement
is executed many times.
Starting with 1.7.2, the support for and behaviour of PreparedStatment has changed. Please read the introductory section of the documentation for org.hsqldb.jdbc.jdbcPreparedStatement.
prepareStatement
in interface java.sql.Connection
sql
- an SQL statement that may contain one or more '?'
IN parameter placeholders
PreparedStatement
object
containing the pre-compiled SQL statement
java.sql.SQLException
- if a database access error occurs prepareStatement(String,int,int)
public java.sql.CallableStatement prepareCall(java.lang.String sql) throws java.sql.SQLException
CallableStatement
object for calling database stored procedures. The
CallableStatement
object provides methods for setting up
its IN and OUT parameters, and methods for executing the call to a
stored procedure.
Note: This method is optimized for handling stored
procedure call statements. Some drivers may send the call
statement to the database when the method prepareCall
is done; others may wait until the CallableStatement
object is executed. This has no direct effect on users;
however, it does affect which method throws certain
SQLExceptions.
Result sets created using the returned CallableStatement
object will by default be type TYPE_FORWARD_ONLY
and have a concurrency level of CONCUR_READ_ONLY
.
Starting with 1.7.2, the support for and behaviour of CallableStatement has changed. Please read the introductory section of the documentation for org.hsqldb.jdbc.jdbcCallableStatement.
prepareCall
in interface java.sql.Connection
sql
- a String object that is the SQL statement to be
sent to the database; may contain one or more ?
parameters. Note: Typically the SQL statement is a JDBC function call escape string.
CallableStatement
object
containing the pre-compiled SQL statement
java.sql.SQLException
- if a database access error occurs prepareCall(String,int,int)
public java.lang.String nativeSQL(java.lang.String sql) throws java.sql.SQLException
Up to and including 1.7.2, HSQLDB converts the JDBC SQL grammar into the system's native SQL grammar prior to sending it, if escape processing is set true; this method returns the native form of the statement that the driver would send in place of client-specified JDBC SQL grammar.
Before 1.7.2, escape processing was incomplete and also broken in terms of support for nested escapes.
Starting with 1.7.2, escape processing is complete and handles nesting to arbitrary depth, but enforces a very strict interpretation of the syntax and does not detect or process SQL comments.
In essence, the HSQLDB engine directly handles the prescribed syntax and date / time formats specified internal to the JDBC escapes. It also directly offers the XOpen / ODBC extended scalar functions specified available internal to the {fn ...} JDBC escape. As such, the driver simply removes the curly braces and JDBC escape codes in the simplest and fastest fashion possible, by replacing them with whitespace. But to avoid a great deal of complexity, certain forms of input whitespace are currently not recognised. For instance, the driver handles "{?= call ...}" but not "{ ?= call ...} or "{? = call ...}"
Also, comments embedded in SQL are currently not detected or processed and thus may have unexpected effects on the output of this method, for instance causing otherwise valid SQL to become invalid. It is especially important to be aware of this because escape processing is set true by default for Statement objects and is always set true when producing a PreparedStatement from prepareStatement() or CallableStatement from prepareCall(). Currently, it is simply recommended to avoid submitting SQL having comments containing JDBC escape sequence patterns and/or single or double quotation marks, as this will avoid any potential problems. It is intended to implement a less strict handling of whitespace and proper processing of SQL comments at some point in the near future, perhaps before the final 1.7.2 release. In any event, 1.7.2 now correctly processes the following JDBC escape forms to arbitrary nesting depth, but only if the exact whitespace layout described below is used:
nativeSQL
in interface java.sql.Connection
sql
- a SQL statement that may contain one or more '?'
parameter placeholders
java.sql.SQLException
- if a database access error occurs public void setAutoCommit(boolean autoCommit) throws java.sql.SQLException
commit
or
the method rollback
. By default, new connections are
in auto-commit mode.
The commit occurs when the statement completes or the next
execute occurs, whichever comes first. In the case of
statements returning a ResultSet
object, the
statement completes when the last row of the ResultSet
object has been retrieved or the ResultSet
object
has been closed. In advanced cases, a single statement may
return multiple results as well as output parameter values. In
these cases, the commit occurs when all results and output
parameter values have been retrieved.
NOTE: If this method is called during a transaction, the transaction is committed.
Up to and including HSQLDB 1.7.2,
(boucherb@users)
setAutoCommit
in interface java.sql.Connection
autoCommit
- true
to enable auto-commit
mode; false
to disable it
java.sql.SQLException
- if a database access error occursgetAutoCommit()
public boolean getAutoCommit() throws java.sql.SQLException
getAutoCommit
in interface java.sql.Connection
java.sql.SQLException
- Description of the ExceptionsetAutoCommit(boolean)
public void commit() throws java.sql.SQLException
Starting with HSQLDB 1.7.2, savepoints are supported both in SQL and via the JDBC interface.
Using SQL, savepoints may be set, released and used in rollback as follows:
SAVEPOINT <savepoint-name> RELEASE SAVEPOINT <savepoint-name> ROLLBACK TO SAVEPOINT <savepoint-name>
commit
in interface java.sql.Connection
java.sql.SQLException
- if a database access error occurssetAutoCommit(boolean)
public void rollback() throws java.sql.SQLException
Starting with HSQLDB 1.7.2, savepoints are fully supported both in SQL and via the JDBC interface.
Using SQL, savepoints may be set, released and used in rollback as follows:
SAVEPOINT <savepoint-name> RELEASE SAVEPOINT <savepoint-name> ROLLBACK TO SAVEPOINT <savepoint-name>
rollback
in interface java.sql.Connection
java.sql.SQLException
- if a database access error occurssetAutoCommit(boolean)
public void close() throws java.sql.SQLException
Connection
object's database and JDBC resources immediately instead of
waiting for them to be automatically released.
 Certain fatal errors also
close a Connection
object.
In 1.7.2, INTERNAL
Connection
objects are not closable from JDBC client code.
close
in interface java.sql.Connection
java.sql.SQLException
- if a database access error occurspublic boolean isClosed()
isClosed
in interface java.sql.Connection
public java.sql.DatabaseMetaData getMetaData() throws java.sql.SQLException
DatabaseMetaData
object.
JDBC DatabaseMetaData
methods returning
ResultSet
were not implemented fully before 1.7.2.
Some of these methods always returned empty result sets.
Other methods did not accurately
reflect all of the MetaData for the category.
Also, some method ignored the filters provided as
parameters, returning an unfiltered result each time.
Also, the majority of methods returning ResultSet
threw an SQLException
when accessed by a non-admin
user.
For discussion in greater detail, please follow the link to the overview for jdbcDatabaseMetaData, below.
getMetaData
in interface java.sql.Connection
java.sql.SQLException
- if a database access error occursjdbcDatabaseMetaData
public void setReadOnly(boolean readonly) throws java.sql.SQLException
Note: This method should not be called while in the middle of a transaction.
Up to and including 1.7.2, HSQLDB will commit the current transaction automatically when this method is called.
Additionally, HSQLDB provides a way to put a whole database in read-only mode. This is done by manually adding the line 'readonly=true' to the database's .properties file while the database is offline. Upon restart, all connections will be readonly, since the entire database will be readonly. To take a database out of readonly mode, simply take the database offline and remove the line 'readonly=true' from the database's .properties file. Upon restart, the database will be in regular (read-write) mode.
When a database is put in readonly mode, its files are opened in readonly mode, making it possible to create CD-based readonly databases. To create a CD-based readonly database that has CACHED tables and whose .data file is suspected of being highly fragmented, it is recommended that the database first be SHUTDOWN COMPACTed before copying the database files to CD. This will reduce the space required and may improve access times against the .data file which holds the CACHED table data.
Starting with 1.7.2, an alternate approach to opimizing the .data file before creating a CD-based readonly database is to issue the CHECKPOINT DEFRAG command followed by SHUTDOWN to take the database offline in preparation to burn the database files to CD.
setReadOnly
in interface java.sql.Connection
readonly
- The new readOnly value
java.sql.SQLException
- if a database access error occurspublic boolean isReadOnly() throws java.sql.SQLException
isReadOnly
in interface java.sql.Connection
java.sql.SQLException
- if a database access error occurspublic void setCatalog(java.lang.String catalog) throws java.sql.SQLException
HSQLDB does not yet support catalogs and simply ignores this request.
setCatalog
in interface java.sql.Connection
catalog
- the name of a catalog (subspace in this
Connection object's database) in which to work (Ignored)
java.sql.SQLException
- if a database access error occurs public java.lang.String getCatalog() throws java.sql.SQLException
HSQLDB does not yet support catalogs and always returns null.
getCatalog
in interface java.sql.Connection
For HSQLDB, this is always null.
java.sql.SQLException
- Description of the Exceptionpublic void setTransactionIsolation(int level) throws java.sql.SQLException
Connection
object to the one given. The constants
defined in the interface Connection
are the
possible transaction isolation levels. Note: If this method is called during a transaction, the result is implementation-defined.
setTransactionIsolation
in interface java.sql.Connection
level
- one of the following Connection
constants: Connection.TRANSACTION_READ_UNCOMMITTED
, Connection.TRANSACTION_READ_COMMITTED
,
Connection.TRANSACTION_REPEATABLE_READ
, or
Connection.TRANSACTION_SERIALIZABLE
. (Note
that Connection.TRANSACTION_NONE
cannot be
used because it specifies that transactions are not
supported.)
java.sql.SQLException
- if a database access error occurs or
the given parameter is not one of the Connection
constants jdbcDatabaseMetaData.supportsTransactionIsolationLevel(int)
,
getTransactionIsolation()
public int getTransactionIsolation() throws java.sql.SQLException
Connection
object's current transaction isolation level.
HSQLDB always returns
Connection.TRANSACTION_READ_UNCOMMITED
.
getTransactionIsolation
in interface java.sql.Connection
Connection.TRANSACTION_READ_UNCOMMITTED
, Connection.TRANSACTION_READ_COMMITTED
,
Connection.TRANSACTION_REPEATABLE_READ
,
Connection.TRANSACTION_SERIALIZABLE
, or
Connection.TRANSACTION_NONE
Up to and including 1.7.1, TRANSACTION_READ_UNCOMMITTED is always returned
java.sql.SQLException
- if a database access error occurs jdbcDatabaseMetaData.supportsTransactionIsolationLevel(int)
,
setTransactionIsolation
public java.sql.SQLWarning getWarnings() throws java.sql.SQLException
Connection
object. If there is more than one
warning, subsequent warnings will be chained to the first
one and can be retrieved by calling the method
SQLWarning.getNextWarning
on the warning
that was retrieved previously.
This method may not be called on a closed connection; doing so
will cause an SQLException
to be thrown.
Note: Subsequent warnings will be chained to this SQLWarning.
Starting with 1.7.2, HSQLDB produces warnings whenever a createStatement(), prepareStatement() or prepareCall() invocation requests an unsupported but defined combination of result set type, concurrency and holdability, such that another set is substituted.
getWarnings
in interface java.sql.Connection
SQLWarning
object or null
if there are none
java.sql.SQLException
- if a database access error occurs or
this method is called on a closed connection SQLWarning
public void clearWarnings() throws java.sql.SQLException
Connection
object. After a call to this method, the method
getWarnings
returns null until
a new warning is reported for this Connection.
Before HSQLDB 1.7.2, SQLWarning
was not
supported, and calls to this method are simply ignored.
Starting with HSQLDB 1.7.2, the standard behaviour is implemented.
clearWarnings
in interface java.sql.Connection
java.sql.SQLException
- if a database access error occurs public java.sql.Statement createStatement(int type, int concurrency) throws java.sql.SQLException
Statement
object that will generate
ResultSet
objects with the given type and
concurrency. This method is the same as the
createStatement
method above, but it allows the
default result set type and result set concurrency type to be
overridden.
Up to HSQLDB 1.6.1, support was provided only for type
TYPE_FORWARD_ONLY
and concurrency CONCUR_READ_ONLY
.
Starting with HSQLDB 1.7.0, support is now provided for types
TYPE_FORWARD_ONLY
, and
TYPE_SCROLL_INSENSITIVE
,
with concurrency CONCUR_READ_ONLY
.
Starting with HSQLDB 1.7.2, the behaviour regarding the type and
concurrency values has changed to more closely conform to the
specification. That is, if an unsupported combination is requested,
a SQLWarning is issued on this Connection and the closest supported
combination is used instead.
Notes:
Up to 1.6.1, calling this method returned null
if the
connection was already closed and a supported combination of type and
concurrency was specified. This was possibly counter-intuitive
to the expectation that an exception would be thrown for
closed connections. Starting with 1.7.0. the behaviour is to throw a
SQLException
if the connection is closed.
createStatement
in interface java.sql.Connection
type
- a result set type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
(not
supported)concurrency
- a concurrency type; one of
ResultSet.CONCUR_READ_ONLY
or ResultSet.CONCUR_UPDATABLE
(not supported)
Statement
object that will, within
the release-specific documented limitations of support,
generate ResultSet
objects with the given
type and concurrency
java.sql.SQLException
- if a database access error occurs or
the given parameters are not ResultSet constants
indicating a supported type and concurrencypublic java.sql.PreparedStatement prepareStatement(java.lang.String sql, int type, int concurrency) throws java.sql.SQLException
PreparedStatement
object that will
generate ResultSet
objects with the given type
and concurrency. This method is the same as the
prepareStatement
method above, but it allows the
default result set type and result set concurrency type to be
overridden.
Starting with HSQLDB 1.7.2, the behaviour regarding the type and concurrency values has changed to more closely conform to the specification. That is, if an unsupported combination is requested, a SQLWarning is issued on this Connection and the closest supported combination is used instead.
Also starting with 1.7.2, the support for and behaviour of PreparedStatment has changed. Please read the introductory section of the documentation for org.hsqldb.jdbc.jdbcPreparedStatement.
prepareStatement
in interface java.sql.Connection
sql
- a String object that is the SQL statement to be
sent to the database; may contain one or more ? IN
parameterstype
- a result set type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
(not
supported)concurrency
- a concurrency type; one of
ResultSet.CONCUR_READ_ONLY
or ResultSet.CONCUR_UPDATABLE
(not supported)
ResultSet
objects with the given type and concurrency
java.sql.SQLException
- if a database access error occurs or
the given parameters are not ResultSet constants
indicating a supported type and concurrencypublic java.sql.CallableStatement prepareCall(java.lang.String sql, int resultSetType, int resultSetConcurrency) throws java.sql.SQLException
CallableStatement
object that will generate ResultSet
objects with
the given type and concurrency. This method is the same as the
prepareCall
method above, but it allows the
default result set type and result set concurrency type to be
overridden.
Starting with HSQLDB 1.7.2, the behaviour regarding the type, concurrency and holdability values has changed to more closely conform to the specification. That is, if an unsupported combination is requrested, a SQLWarning is issued on this Connection and the closest supported combination is used instead.
Also starting with 1.7.2, the support for and behaviour of CallableStatement has changed. Please read the introdutory section of the documentation for org.hsqldb.jdbc.jdbcCallableStatement.
prepareCall
in interface java.sql.Connection
sql
- a String object that is the SQL statement to be
sent to the database; may contain one or more ? parametersresultSetType
- a result set type; one of
ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, (not
supported) or ResultSet.TYPE_SCROLL_SENSITIVE
(not supported)resultSetConcurrency
- a concurrency type; one of
ResultSet.CONCUR_READ_ONLY
or ResultSet.CONCUR_UPDATABLE
(not supported)
java.sql.SQLException
- if a database access error occurs or
the given parameters are not ResultSet
constants indicating a supported type and concurrencypublic java.util.Map getTypeMap() throws java.sql.SQLException
HSQLDB 1.7.2 does not support this feature. Calling this
method always throws a SQLException
, stating that the
function is not supported.
getTypeMap
in interface java.sql.Connection
java.util.Map
object associated with
this Connection
object
java.sql.SQLException
- if a database access error occurs
(always, up to HSQLDB 1.7.0, inclusive)public void setTypeMap(java.util.Map map) throws java.sql.SQLException
TypeMap
object as the type map for this Connection
object. The type map will be used for the custom mapping of
SQL structured types and distinct types.
HSQLDB 1.7.2 does not support this feature. Calling this
method always throws a SQLException
, stating that
the function is not supported.
setTypeMap
in interface java.sql.Connection
map
- the java.util.Map
object to install as
the replacement for this Connection
object's
default type map
java.sql.SQLException
- if a database access error occurs or
the given parameter is not a java.util.Map
object (always, up to HSQLDB 1.7.0, inclusive)getTypeMap()
public void setHoldability(int holdability) throws java.sql.SQLException
ResultSet
objects created using this
Connection
object to the given holdability.
Starting with HSQLDB 1.7.2, this feature is supported.
As of 1.7.2, only HOLD_CURSORS_OVER_COMMIT is supported; supplying any other value will throw an exception.
setHoldability
in interface java.sql.Connection
holdability
- a ResultSet
holdability
constant; one of ResultSet.HOLD_CURSORS_OVER_COMMIT
or ResultSet.CLOSE_CURSORS_AT_COMMIT
java.sql.SQLException
- if a database access occurs, the given
parameter is not a ResultSet
constant
indicating holdability, or the given holdability is not
supportedgetHoldability()
,
ResultSet
public int getHoldability() throws java.sql.SQLException
ResultSet
objects created using
this Connection
object.
Starting with HSQLDB 1.7.2, this feature is supported.
Calling this method always returns HOLD_CURSORS_OVER_COMMIT.
getHoldability
in interface java.sql.Connection
ResultSet.HOLD_CURSORS_OVER_COMMIT
or ResultSet.CLOSE_CURSORS_AT_COMMIT
java.sql.SQLException
- if a database access occurssetHoldability(int)
,
ResultSet
public java.sql.Savepoint setSavepoint() throws java.sql.SQLException
Savepoint
object that represents it.
HSQLDB 1.7.2 does not support this feature.
Calling this method always throws a SQLException
,
stating that the function is not supported.
Use setSavepoint(String name) instead
setSavepoint
in interface java.sql.Connection
Savepoint
object
java.sql.SQLException
- if a database access error occurs or
this Connection
object is currently in
auto-commit modejdbcSavepoint
,
Savepoint
public java.sql.Savepoint setSavepoint(java.lang.String name) throws java.sql.SQLException
Savepoint
object that represents it.
setSavepoint
in interface java.sql.Connection
name
- a String
containing the name of the savepoint
Savepoint
object
java.sql.SQLException
- if a database access error occurs or
this Connection
object is currently in
auto-commit modejdbcSavepoint
,
Savepoint
public void rollback(java.sql.Savepoint savepoint) throws java.sql.SQLException
Savepoint
object was set. This method should be used only when auto-commit has been disabled.
rollback
in interface java.sql.Connection
savepoint
- the Savepoint
object to roll back to
java.sql.SQLException
- if a database access error occurs,
the Savepoint
object is no longer valid,
or this Connection
object is currently in
auto-commit modejdbcSavepoint
,
Savepoint
,
rollback()
public void releaseSavepoint(java.sql.Savepoint savepoint) throws java.sql.SQLException
Savepoint
object from the current transaction. Any reference to the
savepoint after it have been removed will cause an
SQLException
to be thrown.
releaseSavepoint
in interface java.sql.Connection
savepoint
- the Savepoint
object to be removed
java.sql.SQLException
- if a database access error occurs or
the given Savepoint
object is not a valid
savepoint in the current transactionjdbcSavepoint
,
Savepoint
public java.sql.Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws java.sql.SQLException
Statement
object that will generate ResultSet
objects with
the given type, concurrency, and holdability. This method is
the same as the createStatement
method above, but
it allows the default result set type, concurrency, and
holdability to be overridden.
Starting with HSQLDB 1.7.2, this feature is supported.
Starting with HSQLDB 1.7.2, the behaviour regarding the type, concurrency and holdability values has changed to more closely conform to the specification. That is, if an unsupported combination is requested, a SQLWarning is issued on this Connection and the closest supported combination is used instead.
createStatement
in interface java.sql.Connection
resultSetType
- one of the following ResultSet
constants: ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
,
or ResultSet.TYPE_SCROLL_SENSITIVE
resultSetConcurrency
- one of the following
ResultSet
constants: ResultSet.CONCUR_READ_ONLY
or
ResultSet.CONCUR_UPDATABLE
resultSetHoldability
- one of the following
code>ResultSet
constants: ResultSet.HOLD_CURSORS_OVER_COMMIT
or ResultSet.CLOSE_CURSORS_AT_COMMIT
Statement
object that will generate
ResultSet
objects with the given type,
concurrency, and holdability
java.sql.SQLException
- if a database access error occurs or
the given parameters are not ResultSet
constants indicating type, concurrency, and holdabilityResultSet
public java.sql.PreparedStatement prepareStatement(java.lang.String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws java.sql.SQLException
PreparedStatement
object that will generate ResultSet
objects with
the given type, concurrency, and holdability.
This method is the same as the prepareStatement
method above, but it allows the default result set type,
concurrency, and holdability to be overridden.
Starting with HSQLDB 1.7.2, this feature is supported.
Starting with HSQLDB 1.7.2, the behaviour regarding the type, concurrency and holdability values has changed to more closely conform to the specification. That is, if an unsupported combination is requested, a SQLWarning is issued on this Connection and the closest supported combination is used instead.
Also starting with 1.7.2, the support for and behaviour of PreparedStatment has changed. Please read the introductory section of the documentation for org.hsqldb.jdbc.jdbcPreparedStatement.
prepareStatement
in interface java.sql.Connection
sql
- a String
object that is the SQL
statement to be sent to the database; may contain one or
more ? IN parametersresultSetType
- one of the following ResultSet
constants: ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
,
or ResultSet.TYPE_SCROLL_SENSITIVE
resultSetConcurrency
- one of the following
ResultSet
constants: ResultSet.CONCUR_READ_ONLY
or
ResultSet.CONCUR_UPDATABLE
resultSetHoldability
- one of the following
ResultSet
constants: ResultSet.HOLD_CURSORS_OVER_COMMIT
or ResultSet.CLOSE_CURSORS_AT_COMMIT
PreparedStatement
object,
containing the pre-compiled SQL statement, that will
generate ResultSet
objects with the given
type, concurrency, and holdability
java.sql.SQLException
- if a database access error occurs or
the given parameters are not ResultSet
constants indicating type, concurrency, and holdabilityResultSet
public java.sql.CallableStatement prepareCall(java.lang.String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws java.sql.SQLException
CallableStatement
object that will generate ResultSet
objects with
the given type and concurrency. This method is the same as the
prepareCall
method above, but it allows the
default result set type, result set concurrency type and
holdability to be overridden.
Starting with HSQLDB 1.7.2, this feature is supported.
Starting with HSQLDB 1.7.2, the behaviour regarding the type, concurrency and holdability values has changed to more closely conform to the specification. That is, if an unsupported combination is requrested, a SQLWarning is issued on this Connection and the closest supported combination is used instead.
Also starting with 1.7.2, the support for and behaviour of CallableStatment has changed. Please read the introdutory section of the documentation for org.hsqldb.jdbc.jdbcCallableStatement.
prepareCall
in interface java.sql.Connection
sql
- a String
object that is the SQL
statement to be sent to the database; may contain on or
more ? parametersresultSetType
- one of the following ResultSet
constants: ResultSet.TYPE_FORWARD_ONLY
,
ResultSet.TYPE_SCROLL_INSENSITIVE
, or
ResultSet.TYPE_SCROLL_SENSITIVE
resultSetConcurrency
- one of the following
ResultSet
constants: ResultSet.CONCUR_READ_ONLY
or
ResultSet.CONCUR_UPDATABLE
resultSetHoldability
- one of the following
ResultSet
constants: ResultSet.HOLD_CURSORS_OVER_COMMIT
or ResultSet.CLOSE_CURSORS_AT_COMMIT
CallableStatement
object,
containing the pre-compiled SQL statement, that will
generate ResultSet
objects with the given
type, concurrency, and holdability
java.sql.SQLException
- if a database access error occurs or
the given parameters are not ResultSet
constants indicating type, concurrency, and holdabilityResultSet
public java.sql.PreparedStatement prepareStatement(java.lang.String sql, int autoGeneratedKeys) throws java.sql.SQLException
PreparedStatement
object that has the capability to retrieve auto-generated
keys. The given constant tells the driver whether it should
make auto-generated keys available for retrieval. This
parameter is ignored if the SQL statement is not an
INSERT
statement.
Note: This method is optimized for handling parametric
SQL statements that benefit from precompilation. If the driver
supports precompilation, the method prepareStatement
will send the statement to the database for precompilation.
Some drivers may not support precompilation. In this case, the
statement may not be sent to the database until the
PreparedStatement
object is executed. This has no direct effect on users;
however, it does affect which methods throw certain
SQLExceptions.
Result sets created using the returned PreparedStatement
object will by default be type TYPE_FORWARD_ONLY
and have a concurrency level of CONCUR_READ_ONLY
.
HSQLDB 1.7.2 does not support this feature.
Calling this method always throws a SQLException
,
stating that the function is not supported.
prepareStatement
in interface java.sql.Connection
sql
- an SQL statement that may contain one or more '?'
IN parameter placeholdersautoGeneratedKeys
- a flag indicating that auto-generated
keys should be returned, one of
code>Statement.RETURN_GENERATED_KEYS
or Statement.NO_GENERATED_KEYS
.
PreparedStatement
object,
containing the pre-compiled SQL statement, that will have
the capability of returning auto-generated keys
java.sql.SQLException
- if a database access error occurs or
the given parameter is not a Statement
constant indicating whether auto-generated keys should be
returnedpublic java.sql.PreparedStatement prepareStatement(java.lang.String sql, int[] columnIndexes) throws java.sql.SQLException
PreparedStatement
object capable of returning the auto-generated keys designated
by the given array. This array contains the indexes of the
columns in the target table that contain the auto-generated
keys that should be made available. This array is ignored if
the SQL statement is not an INSERT
statement.
An SQL statement with or without IN parameters can be
pre-compiled and stored in a PreparedStatement
object. This object can then be used to efficiently execute
this statement multiple times.
Note: This method is optimized for handling parametric
SQL statements that benefit from precompilation. If the driver
supports precompilation, the method prepareStatement
will send the statement to the database for precompilation.
Some drivers may not support precompilation. In this case, the
statement may not be sent to the database until the
PreparedStatement
object is executed. This has no direct effect on users;
however, it does affect which methods throw certain
SQLExceptions.
Result sets created using the returned PreparedStatement
object will by default be type TYPE_FORWARD_ONLY
and have a concurrency level of CONCUR_READ_ONLY
.
HSQLDB 1.7.2 does not support this feature.
Calling this method always throws a SQLException
,
stating that the function is not supported.
prepareStatement
in interface java.sql.Connection
sql
- an SQL statement that may contain one or more '?'
IN parameter placeholderscolumnIndexes
- an array of column indexes indicating the
columns that should be returned from the inserted row or
rows
PreparedStatement
object,
containing the pre-compiled statement, that is capable of
returning the auto-generated keys designated by the given
array of column indexes
java.sql.SQLException
- if a database access error occurspublic java.sql.PreparedStatement prepareStatement(java.lang.String sql, java.lang.String[] columnNames) throws java.sql.SQLException
PreparedStatement
object capable of returning the auto-generated keys designated
by the given array. This array contains the names of the
columns in the target table that contain the auto-generated
keys that should be returned. This array is ignored if the SQL
statement is not an INSERT
statement.
An SQL statement with or without IN parameters can be
pre-compiled and stored in a PreparedStatement
object. This object can then be used to efficiently execute
this statement multiple times.
Note: This method is optimized for handling parametric
SQL statements that benefit from precompilation. If the driver
supports precompilation, the method prepareStatement
will send the statement to the database for precompilation.
Some drivers may not support precompilation. In this case, the
statement may not be sent to the database until the
PreparedStatement
object is executed. This has no direct effect on users;
however, it does affect which methods throw certain
SQLExceptions.
Result sets created using the returned PreparedStatement
object will by default be type TYPE_FORWARD_ONLY
and have a concurrency level of CONCUR_READ_ONLY
.
HSQLDB 1.7.2 does not support this feature.
Calling this method always throws a SQLException
,
stating that the function is not supported.
prepareStatement
in interface java.sql.Connection
sql
- an SQL statement that may contain one or more '?'
IN parameter placeholderscolumnNames
- an array of column names indicating the
columns that should be returned from the inserted row or
rows
PreparedStatement
object,
containing the pre-compiled statement, that is capable of
returning the auto-generated keys designated by the given
array of column names
java.sql.SQLException
- if a database access error occurspublic void reset() throws java.sql.SQLException
java.sql.SQLException
|
|||||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |


Before Change
filter_types = ["ramp", "shepp-logan", "cosine", "hamming", "hann"]
interpolation_types = ["linear", "nearest"]
radon_iradon_inputs = list(itertools.product(interpolation_types,
filter_types))
// cubic interpolation is slow; only run one test for it
radon_iradon_inputs.append(("cubic", "shepp-logan"))
After Change
// if adding more shapes to test data, you might want to look at commit d0f2bac3f
shapes_radon_iradon_circle = ((61, 79), )
interpolations = ("nearest", "linear")
output_sizes = (None,
min(shapes_radon_iradon_circle[0]),
max(shapes_radon_iradon_circle[0]),
97)


Convenor
The member who makes sure the team is perfectly tuned. The leader who is the first to any responsibility. Whether it be talking to the faculty mentors or motivating any member to do their best, he is omnipresent when it comes to SAC-KGEC. With a good knowledge in music besides cars, he is definitely an asset as a senior.
Convenor
Extremely skilled with various design and simulation softwares and has a good grasp on the concepts of AI as well. The ease with which he helps members with their various doubts regarding any topic related to cars has made him one of the most important members of the club.
Convenor
Probably the most knowledgeable, when it comes to automobiles, among all the core team members. His experience in the AI field is also commendable. He is one of those students who first came up with the idea of an automobile club and worked tirelessly to turn that idea into a reality.
3rd Year Coordinator
One of the most talented when it comes to design and simulation softwares. Has a good knowledge in CNC, Mechatronics, PLC Programming, Deep Learning, Industrial Automation as well! Thus a complete package with all the necessary skill set required to be at one of the most demanding positions at SAC-KGEC.
3rd Year Coordinator
Students' Automobile Club of KGEC is the brain child of very few Automotive Enthusiast and that list would be incomplete without Subhadeep. His zest and love for the club is contagious and motivates every single member of the club to give their all. He has unparalleled competence when it comes to the field of Automobiles. His areas of expertise goes in the region of CAD Design and Simulations softwares. He also have decent understanding of the working of CNC Machining.
Poster Maker & Video Editor
Head of the Poster Making and Video Editing team. His exceptional skills in video editing combined with his knowledge in automobile field will be a major boost to the club when it comes to presenting our ideas and work to the world through social media.
2nd Year Coordinator
Having a keen interest in energy conversion and efficiency and with commendable management skills. He also manages to have expertise in various other fields of virtual importance. With his befitting knowledge of dynamics and thermofluids, he can make things to come into actions. Been with Students Automobile Club since prolegomenon & helped to make the team stronger.
2nd Year Coordinator
Has a good understanding of Aerodynamics and Fluid Flow. Also has decent knowledge of the Support Structures and Stress Distribution across the Chassi. He has a deep love for the process of fabrication and follows the agenda of learning by doing. Been with the Automobile Club since it's Inception helping his colleagues fulfilling the targets set for ourselves.
Website Developer
One of the developers of this website. Possesses technical knowledge in web development and designing software like Fusion360 and an enthusiast in automobile industry.
Website Developer
Sophomore undergrad. Has a good understanding of Aerodynamics and Fluid Flow. He also manages to have expertise in various other fields of virtual importance. His interests- Anything with wheels and an engine. Proponent of EVs though a hardcore fan of ICs. He strongly believes in -La mia auto, le mie regole.


interested in data science, engineering, or product roles in b2c.
passionate about accessibility and empowerment, education, healthcare, and finance.
would greatly appreciate your tips on navigating post-grad life. been trying to educate myself on personal finance.
Fun Facts:
you can find me as a berkeley data science major peer advisor this fall!
you can also find me as a campus ambassador for Morning Brew, so click here if you care to learn more about the most important news of the day (which you should) and get it sent straight to your inbox every morning!
former competitive rhythmic gymnast.
my favorite drinks are matcha latte, new orleans, and nitro cold brew with sweet cream.


<<<<<<< HEAD
home
=======
home
>>>>>>> f2b5fadb8d752b47316343c2c71a80923003d455
about
projects
Snoopi
Emojicon Runner
12 Days
Wayback WiFi
more...
contact
blog
<<<<<<< HEAD
=======
>>>>>>> f2b5fadb8d752b47316343c2c71a80923003d455
<<<<<<< HEAD
Contact
=======
contact
>>>>>>> f2b5fadb8d752b47316343c2c71a80923003d455
<<<<<<< HEAD
=======
>>>>>>> f2b5fadb8d752b47316343c2c71a80923003d455
Say hello!


Methods
check(path, version) → {AsyncTransaction}
Add a check (existence) operation with given path and optional version.
Parameters:
| Name | Type | Description |
|---|---|---|
path |
* | Path of the node. |
version |
* | The version of the node, optional, defaults to -1. |
Returns:
- Type
- AsyncTransaction
commit(cb)
Execute the transaction atomically.
Parameters:
| Name | Type | Description |
|---|---|---|
cb |
function | The callback function. |
commitAsync() → {Promise}
Execute the transaction atomically. Resolves when the operation has completed,
rejects if anything goes wrong.
Returns:
- Type
- Promise
create(path, data, acls, mode) → {AsyncTransaction}
Add a create operation with given path, data, acls and mode.
Parameters:
| Name | Type | Default | Description |
|---|---|---|---|
path |
String | Path of the node. | |
data |
Buffer | null | The data buffer, optional, defaults to null. |
acls |
Array.<ACL> | null | An array of ACL objects, optional, defaults to ACL.OPEN_ACL_UNSAFE |
mode |
CreateMode | null | The creation mode, optional, defaults to CreateMode.PERSISTENT |
Returns:
- Type
- AsyncTransaction
remove(path, version) → {AsyncTransaction}
Add a delete operation with the given path and optional version.
Parameters:
| Name | Type | Description |
|---|---|---|
path |
* | Path of the node. |
version |
* | The version of the node, optional, defaults to -1. |
Returns:
- Type
- AsyncTransaction
setData(path, data, version) → {AsyncTransaction}
Add a set-data operation with the given path, data and optional version.
Parameters:
| Name | Type | Description |
|---|---|---|
path |
string | Path of the node. |
data |
Buffer | The data buffer, or null. |
version |
number | The version of the node, optional, defaults to -1. |
Returns:
- Type
- AsyncTransaction


We bring you the new era of the "Smart phone"
We bring you the new era of the "Smart phone"
We bring you the new era of the "Smart phone"
We bring you the new era of the "Smart phone"
We bring you the new era of the "Smart phone"


(placeholder) ... This is the first sketch I have done before in Processing, I have never done anything like this..
In this sketch I attempted to use the for loop for the first... rectangle, ellipse, bla bla....
(placeholder) ... In this sketch .... built-in functions: setup() draw()...shortcuts: ++, --, ...
play video(placeholder) ...


Location: tEp
Is it pronounced Hero? Ji-ro? Year-o? Eh, Who cares. Come chow on our homemade mediterranean feast! (vegetarian/vegan options available)Saturday, August 31st
Location: tEp
Is it pronounced Hero? Ji-ro? Year-o? Eh, Who cares.  Well, now's your chance to join our xisters in some building/crafting.
Location: tEp
We have more food than we know what to do with and have to eat it all. One rule: you're not allowed to feed yourself. You don't have to come with a friend to leave satisfied in more ways than one. Vegan options available.
Location: tEp
The time has come. We must retreat once more from whence we came in preparation for a glorious rebirth in one thousand years time. Join us at tEp for a night of pillow fights, truth or dare, and gossiping about the cutest boys in school as we prepare for our Thousand Year Slumber. Pajamas recommended.Sunday, September 1st
Location: Kresge BBQ Pits
Grill up some unique creations with the xisters of tEp. We got burgers, buns, and everything but the kitchen sink. (Vegan options available.)
Location: tEp
The quantum monsters are coming. There's not a lot of corndogs left, so you'll have to figure out the clues to escape before they come for you.
Location: tEp
Join us on a trip to the North end to hunt one of Boston's most elusive dessert species: the cannolo.Monday, September 2nd
Location: tEp
Hate Monday mornings? It's still the weekend if you never stop partying. Breakfast included, vegan options available.
Location: Kresge Oval
tEp loves diversity. And rainbows. Join us for tie-dying, colorful food, and good conversation about being queer at MIT.
Location: Kresge Oval
Sure, you've tasted the rainbow before. But have you ever weaponized it?
Location: tEp
Experience over 1000 pounds of non-newtonian fun. What could go wrong?Tuesday, September 3rd
Location: McDermott Dot
Meat or get meaten (vegan options available)
Location: tEp
Phase 1: Acquire ludacrous attire. Phase 2: Pick a thing to do in public. Phase 3: Do that thing in public, pray for attention.Wednesday, September 4th
Location: tEp
Phase 1: Acquire ludacrous attire. Phase 2: Pick a thing to do in public. Phase 3: Do that thing in public, pray for attention.
Location: tEp
One cocoa, two cocoa, red cocoa, blue cocoa! On the first day of classes of every week, tEp has a hot cocoa study break with lots of cheese and other snacks. While a cocoa's a cocoa no matter how small, this one is particularly special. Ft. Dr. Seuss read far too dramatically.Thursday, September 5th
Location: tEp
🍌 🍑 ✏ 🎨
Location: tEp
Join in an age old tradition as we recount the adventures of our week over light refreshements.Friday, September 6th
Location: tEp
Ever feel like dressing up for no reason then staying at home?


Refer to operating system and the links given in reference section of each page.
LInk to the book
There are two ways in which immediate files can be implemented in the minix operating system -
Static : In this approach, the maximum file size is specified at creation and you can't change the type of file once created. In case the immediate file size exceeds the specified size, it will report an error. This is can be implemented by creating a new file system.
Dynamic : A file is created as an immediate file and if size exceeds specified size, it becomes a regular file. To implement this approach, we need to make changes in the existing file system.
Implementation in Dynamic Approach:
To include immediate file system in an existing file system, the following sections are involved -
Data structures representing files
Virtual File System
Message Formats
Minix File System : in the funtions of the regular file system of minix, there is almost no change in create, open and close functions. The changes in read, write, delete are made so that if the file is immediate (which can be deduced by comparing size), then there is the content is to be accessed from the inode.
pkgin
or pkgin_cd
. Refer the link abovepkgin_cd
, you must install virtual box extensions from hererc.conf
, if pkgin_cd
is not working.The /usr/src/servers/mfs
directory contains the source code for FS in
minx3.2 operating system. Some of the important files in mfs are main.c, in-
ode.h, open.c, write.c, buf.h, super.h, super.c
etc. The main function of
each file in mfs are listed below:
we can see that there are 7 zones of 4 bytes each, an indirect
zone of size 4 bytes, a double indirect node of size 4 bytes and an unused
space of 4 bytes. Each zone points to a disk block where actual data gets
stored. According to definition of immediate files we had to find a space
in the inode where we can store the immediate files. These zones are apt
place to store the immediate files because no data which is critical to the
file is being affected. We calcualted maximum size of immediate files as
40 bytes by adding up sizes of all zones, indirect zones and unused space.
max size = zn sz X 7 + ud sz + idt sz + ddt sz
max size = 4 X 7 + 4 + 4 + 4 = 40bytes
This is a union of different types of blocks in the disk. Eg. normal data block, directory block, inode block, bitmap block etc. The design of buffer or block cache is given below.
b_data array is used to cache the data which is stored in the disk block, all the modifications by the user are done here and then the data is written back to the disk. b data(b) is a macro which returns the pointer to the first byte of b data array.
mess 1, mess 2, mess 3, . . . are different message types. In MFS, global variables, fs m in and fs m out, of type message are used to send and recieve messages from various servers like VFS. Following system calls are used for message passing: echo, notify, sendrec, receive, send.
List of all files in which codes are added or deleted.
#define
S_IFIMMED 0130000
#define S_IFIMMED S_IFIMMED
#define S_ISIMMED(m) ( ( (m) & S IFMT ) == S IFIMMED )
References


| Package | Description |
|---|---|
| net.jini.jeri |
Provides the fundamental abstractions and standard implementation
classes for Jini extensible remote invocation (Jini ERI).
|
| net.jini.jeri.http |
Provides implementations of the
Endpoint and
ServerEndpoint abstractions that use HTTP
messages sent over TCP sockets as the underlying communication
mechanism. |
| net.jini.jeri.kerberos |
Provides implementations of
Endpoint and ServerEndpoint that use Kerberos as the underlying
network security protocol to support security related invocation
constraints for remote requests. |
| net.jini.jeri.ssl |
Provides implementations of
Endpoint and ServerEndpoint that use TLS/SSL and HTTPS (HTTP over
TLS/SSL) to support invocation constraints. |
| net.jini.jeri.tcp |
Provides implementations of the
Endpoint and
ServerEndpoint abstractions that use TCP sockets
as the underlying communication mechanism. |
| org.apache.river.jeri.internal.mux | |
| org.apache.river.jeri.internal.runtime |
| Class and Description |
|---|
| BasicExportTable
An ObjectTable front end for exporting remote objects with a
ServerEndpoint as the producer of InboundRequests.
|
| BasicExportTable.Entry
Represents a remote object exported to this BasicExportTable.
|
| DgcClient
Jeri ERI client-side DGC implementation.
|
| Class and Description |
|---|
| LocalHost
This was common security code in all ServerEndpoint.enumerateListenEndpoints
calls, rather than duplicate this code, due to it's performance and
security sensitivity, it has been separated here to avoid duplication.
|
| Class and Description |
|---|
| LocalHost
This was common security code in all ServerEndpoint.enumerateListenEndpoints
calls, rather than duplicate this code, due to it's performance and
security sensitivity, it has been separated here to avoid duplication.
|
| Class and Description |
|---|
| LocalHost
This was common security code in all ServerEndpoint.enumerateListenEndpoints
calls, rather than duplicate this code, due to it's performance and
security sensitivity, it has been separated here to avoid duplication.
|
| Class and Description |
|---|
| LocalHost
This was common security code in all ServerEndpoint.enumerateListenEndpoints
calls, rather than duplicate this code, due to it's performance and
security sensitivity, it has been separated here to avoid duplication.
|
| Class and Description |
|---|
| SelectionManager
A SelectionManager provides an event dispatching layer on top of the
java.nio.Selector and java.nio.SelectableChannel abstractions; it manages
one-shot registrations of interest in I/O readiness events and
dispatching notifications of such events to registered callback objects.
|
| SelectionManager.Key
A Key represents a given SelectableChannel's registration with this
SelectionManager.
|
| SelectionManager.SelectionHandler
SelectionHandler is the callback interface for an object that will
process an I/O readiness event that has been detected by a
SelectionManager.
|
| Class and Description |
|---|
| AbstractDgcClient
AbstractDgcClient implements the client-side behavior of RMI's
distributed garbage collection system abstractly with respect to
the types used to represent transport endpoints, object IDs, and
live remote references.
|
| AbstractDgcClient.CleanRequest
CleanRequest holds the data for the arguments of a clean call
that needs to be made.
|
| AbstractDgcClient.DgcProxy
A DgcProxy is a proxy for invoking DGC operations on a server-side
DGC implementation at a particular endpoint.
|
| AbstractDgcClient.EndpointEntry
EndpointEntry encapsulates the client-side DGC information specific
to a particular endpoint.
|
| AbstractDgcClient.EndpointEntry.RefEntry
RefEntry encapsulates the client-side DGC information specific to
a particular object ID of an endpoint (a unique live reference
value).
|
| AbstractDgcClient.EndpointEntry.RefEntry.PhantomLiveRef
PhantomLiveRef is a PhantomReference to a live reference
instance, used to detect when the particular live reference
becomes permanently unreachable in this VM.
|
| BasicExportTable.Entry
Represents a remote object exported to this BasicExportTable.
|
| Binding
A bound ListenEndpoint and the associated ListenHandle and
RequestDispatcher.
|
| CharacterEncoder
This class defines the encoding half of character encoders.
|
| DgcRequestDispatcher |
| DgcServer
Remote interface for Jini ERI server-side DGC implementation.
|
| ImplRefManager
Manages references to remote object implementations (impls) used by
ObjectTable targets.
|
| ImplRefManager.ImplRef
A managed reference to a remote object implementation (impl).
|
| JvmLifeSupport
This class maintains a thread if necessary, in the wait state, to prevent
the jvm shutting down while remote objects hold strong references in the
DGC.
|
| Lease |
| ObjectTable
A table of exported remote objects.
|
| ObjectTable.NoSuchObject |
| SameClassKey
Wraps collection elements (such as hash table keys) so that two
wrapped elements are only considered to be equal if they have the
same class (as well as being equal by Object.equals).
|
| SelectionManager.Key
A Key represents a given SelectableChannel's registration with this
SelectionManager.
|
| SelectionManager.SelectionHandler
SelectionHandler is the callback interface for an object that will
process an I/O readiness event that has been detected by a
SelectionManager.
|
| SequenceEntry |
| Target
A Target represents a remote object, exported by BasicJeriExporter.
|
| Util.TableCache |
Copyright 2007-2013, multiple authors.
Licensed under the Apache License, Version 2.0, see the NOTICE file for attributions.


| Opcode* | Instruction | Op/En | 64-Bit Mode | Compat/Leg Mode | Description |
| 0F 01 F9 | RDTSCP | NP | Valid | Valid | Read 64-bit time-stamp counter and 32-bit IA32_TSC_AUX value into EDX:EAX and ECX. |
| Op/En | Operand 1 | Operand 2 | Operand 3 | Operand 4 |
| NP | NA | NA | NA | NA |
Loads the current value of the processor’s time-stamp counter (a 64-bit MSR) into the EDX:EAX registers and also loads the IA32_TSC_AUX MSR (address C000_0103H) into the ECX register. The EDX register is loaded with the high-order 32 bits of the IA32_TSC MSR; the EAX register is loaded with the low-order 32 bits of the IA32_TSC MSR; and the ECX register is loaded with the low-order 32-bits of IA32_TSC_AUX MSR. On processors that support the Intel 64 architecture, the high-order 32 bits of each of RAX, RDX, and RCX are cleared.
The processor monotonically increments the time-stamp counter MSR every clock cycle and resets it to 0 whenever the processor is reset. See “Time Stamp Counter” in Chapter 17 of the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 3B, for specific details of the time stamp counter behavior.
When in protected or virtual 8086 mode, the time stamp disable (TSD) flag in register CR4 restricts the use of the RDTSCP instruction as follows. When the TSD flag is clear, the RDTSCP instruction can be executed at any privilege level; when the flag is set, the instruction can only be executed at privilege level 0. (When in real-address mode, the RDTSCP instruction is always enabled.)
The RDTSCP instruction waits until all previous instructions have been executed before reading the counter.
| However, The presence of the RDTSCP instruction is indicated by CPUID leaf 80000001H, EDX bit 27. If the bit is set to 1 then RDTSCP is present on the processor. See “Changes to Instruction Behavior in VMX Non-Root Operation” in Chapter 25 of the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 3C, for more information about the behavior of this instruction in VMX non-root operation. | subsequent instructions may begin execution before the read operation is performed. |
IF (CR4.TSD = 0) or (CPL = 0) or (CR0.PE = 0) THEN EDX:EAX ← TimeStampCounter; ECX ← IA32_TSC_AUX[31:0]; ELSE (* CR4.TSD = 1 and (CPL = 1, 2, or 3) and CR0.PE = 1 *) #GP(0); FI;
None.
| #GP(0) | If the TSD flag in register CR4 is set and the CPL is greater than 0. |
| #UD | If the LOCK prefix is used. If CPUID.80000001H:EDX.RDTSCP[bit 27] = 0. |
| #UD | If the LOCK prefix is used. If CPUID.80000001H:EDX.RDTSCP[bit 27] = 0. |
| #GP(0) | If the TSD flag in register CR4 is set. |
| #UD | If the LOCK prefix is used. If CPUID.80000001H:EDX.RDTSCP[bit 27] = 0. |
Same exceptions as in protected mode.
Same exceptions as in protected mode.


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InstructionAddress()
语法
Result = InstructionAddress()概要
Returns the address of the instruction that was disassembled by a call to NextInstruction().
参数
无.
返回值
The address of the instruction that was disassembled by a call to NextInstruction().
参阅
NextInstruction(), InstructionString()
已支持操作系统
所有


Simple Web-based Visual Analytics
SWeVA is a collaborative framework for design and execution of reusable data processing components in the domain of visual analytics.
It consists of:
- An interactive collaborative editor to design where to get data and what to do with it.
- An execution engine that handles the data processing using web services and local computation.
- A configurable presenter that allows visualization and interaction with the data.
You can directly start with your own projects using the collaborative editor.


NVL
replaces a null with a string. NVL
returns the replacement string when the base expression is null, and the value of the base expression when it is not null.
To replace an expression with one value if it is null and a different value if it is not, use NVL2
.
Data type of the first argument
NVL(expr1, expr2)
expr1
is the base expression that is evaluated.
expr2
is the replacement string that is returned when expr1
is null.
NVL('First String', 'Second String')
returns the value First String
.
NVL(null, 'Second String')
returns the value Second String
.


#include "_doctype.html"
cURL - Vulnerability Table
#include "css.t"
#include "manpage.t"
#define CURL_DOCS
#define DOCS_VULNTABLE
#define CURL_URL docs/vulnerabilities.html
#include "_menu.html"
#include "setup.t"
WHERE3(Docs, "/docs/", Security, "/docs/security.html", Vulnerabilities)
TITLE(curl and libcurl Vulnerabilities Table Overview)
This is an overview that displays what (lib)curl versions that are vulnerable
to what publicly disclosed vulnerabilities!
Each version number link shows a vulnerability summary for that specific release.
#include "vuln.txt"
#include "_footer.html"


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Securing Your Internal Organization With OpenID
I’ve recently been amazed at the number of companies that are still using a VPN or other means to manage their apps/network. Not just large enterprisey companies, but small agile startups. I fully understand that it works, but 95% of these places are also using another key tool for access inside their company… Google Apps. I fully expect companies to use google apps, its more of the former that surprises me most. For a long time OpenID wasn’t at a usable point, even today it still isn’t without its faults. However, it does make for a much cleaner workflow once in place than having your users login to something with they’re used to using elsewhere.
In our personal lives we use email as our keys to the kingdom. In fact I now almost refuse to sign up for any service that doesn’t let me use oauth, so why should a work place be much different. So I inquired with a few companies to see if they were fine with securing things like documentation or wiki’s being google auth, they indeed were. Yet they still seem to have users keep one more username and password for their VPN to be able to login to access internal docs/tools.
Most tech centric companies grow their own apps for many things they do within a company. Even the heavier adopters of SaaS still end up building a lot of internal systems. So why not secure them with your email domain just as you commonly would if it were a public service?
The problem comes in that OpenId with google has an initial setup overhead, but after that works unbelievably well.
The catch
In some cases you currently have to identify your domain as an OpenId provider. This means that @yourname.com is an OpenId provider. This simply means creating a url route for openid in your base site similar to the below:
1 2 3 4 5 6 7 8 9 |
|
This is due to an issue of OpenID discovery which you can read more on at: https://groups.google.com/group/google-federated-login-api/browse_thread/thread/4a7dd2312a47a082/9285cec18a30b9d3?lnk=gst&q=apps+discovery&pli=1#9285cec18a30b9d3. In short, setting up the above can save you a lot of time
Setting up in apps
Most web frameworks have libraries that make it easy to secure your apps with openid/oauth. In particular Django and Rails both make this pretty easy. To make this even simpler for you below is code to actually secure an internal app for both Django and Rails. You can do similar with Flask or Sinatra as well.
Rails
In case your admin controller isn’t already generated:
1
|
|
Then anything you want to secure:
1 2 3 4 5 6 7 8 9 |
|
Django
Finally sync your database:
1
|
|
Secure any view with the login_required
decorator as your typically would with Django.
Summary
In short with some very basic app setup you can have an internal workflow thats just as good as what you use in your day to day outside the office.


--- layout: archive title: Zulip Chat Archive permalink: /stream/113488-general/topic/fpow.20neg.20normal.20form.html ---
I've been playing with fpow
in the perfectoid project. We have the following expressions:
x^(-n)
, (1/x)^n
, 1/(x^n)
and x¯¹ ^n
.
Moving between these is pretty annoying atm. I think the library hasn't really decided on a "normal" form. It isn't really clear to me which one would be best.
Is n : nat here?
No n : int
Of these x^(-n)
"looks" the "most normal" to me, but that is not based on much
I guess people would object if we started simplifying 1/2
to 2⁻¹
, though
It would be 2^(-1)
:wink:
But that doesn't need to happen, right?
Because 1/2
doesn't match one of the 4 forms that I gave above.
It's only 1/(2^1)
that matches. So using priorities (!!) we can make sure that we still get the desired result.
Ah, I was figuring the easiest way to deal with it would be to simplify 1/x
to x^(-1)
, (x^a)^b
to x^(a*b)
and then have rules for multiplying negatives together
Is this the sort of thing where looking at what computer algebra systems do would be helpful?
#1522 is using 1/x
in its statements. It think this discussion didn't really converge onto a normal form yet. Does anyone have some 2cts to contribute?
There is no simp lemma in this PR, so it doesn't claim anything about a normal form.
Well, I think other lemmas should still use the normal form as much as possible... because it will be easier to chain things.
I think those lemmas are still useful to have even if they are not simp
normal form.
Last updated: Apr 24 2020 at 19:02 UTC


--- title: "Team Member" layout: gridlay excerpt: "RT2 Lab: Team members" sitemap: false permalink: /team/ ---
{{ member.role1 }} {{ member.role2 }} {{ member.role3 }}
{{ member.email }}
{{ member.role }}


When using many methods of the ViewModel/TableModel class you'll notice that
you can specify a database connection/transaction.
When specified, commands will be executed against the given connection/transaction
instead of creating a new connection to the database. This is specially useful when
having to perform multiple database operations in a section of code, or when it's
necessary that ALL the commands are successfully executed.
MagnaDB also provides utility methods that let you create connections/transactions using
any given model's connection string. This will be shown in the examples below.
Connections example
using System;
namespace TestMagnaDB
{
class Program
{
static void Main(string[] args)
{
using (var connection = Cat.CreateOpenConnection())
{
Cat missus = new Cat() { Name = "Misulindo", Breed = "Ragdoll" };
Cat chungus = new Cat() { Name = "Hector", Breed = "Persian" };
try
{
missus.Insert(connection);
chungus.Insert(connection);
}
finally
{
connection.Close();
}
}
}
}
}
using System;
namespace TestMagnaDB
{
class Program
{
static void Main(string[] args)
{
using (var transaction = Cat.CreateActiveTransaction())
{
Cat missus = new Cat() { Name = "Misulindo", Breed = "Ragdoll" };
Cat chungus = new Cat() { Name = "Hector", Breed = "Persian" };
try
{
missus.Insert(transaction);
chungus.Insert(transaction);
Always make sure to commit or rollback your transactions
transaction.Commit();
}
catch
{
transaction.Rollback();
}
}
}
}
}


Roxana is a Content Analyst on the Search Ads Team at Google and a student at UC Berkeley Extension pursuing full stack programming.
In her current role as a content analyst, Roxana works with the search ads team to help them provide online users with quality marketing ads. Roxana reviews the ads and reports any errors or issues that violate the guidelines, and then she sends them of for a final QA check. This results in users having a positive experience when coming across the ads.
Roxana’s passion for learning and technology is what led her to pursue programming at UC Berkeley. She enjoys the challenges of learning new languages and concepts, learning full stack programming gives Roxana the freedom to be able to create new things and watch things come together from the front end to the back end.
Roxana’s discovered her passion for technology through Year Up, a one year intensive learning program. She completed 6 months of technical training in IT, and after completed a 6 month internship at Facebook as a marketing intern on the GMS App Ops Team. Roxana’s role at FB consisted of working with the internal teams to launch any information that they needed to share, either with their clients or with FB Users. She used Responsys an online marketing tool to distribute the information through email campaigns, and provided the teams a detailed report on the success of their campaigns.
Upon completion of the UC Berkeley program, Roxana will be searching for full stack developer roles to apply her programming skills as well as to advance them.


4. Cinema Workflow Example
The
Cinema Workflow example is adapted to work on this virtual machine, but
first let's look at how a workflow would run on a target HPC system.
cd ~/pantheon/tutorial
- Take a look at the contents of the directory. A Pantheon workflow is designed
to be a readable set of scripts and directories.
The place to start is the
execute
script,
which has the steps that the workflow will execute.
bootstrap.env - variables that set up the shell env
doc/ - documentation directory
execute - main execution script
inputs/ - a directory of inputs for the workflow
license.md - license file
pantheon/ - pantheon data directory
postprocess - postprocessing directory
readme.md - basic instructions
run/ - run directory
sbang.sh - a portable shell script
setup/ - setup directory
validate/ - validate directory


{% extends "basic.html" %} {% block head_title %}{{ APP_NAME }} subscribe{% endblock %} {% block body%}
we have sent you an email with activation link; and an invitation to the chat-bot!
please activate your account to start recieving notifications from post-bot!
for CHAT-BOT NOTIFICATIONS use this webhook listeners :
http://post-bot.appspot.com/post/xmpp/{{ user_address }}
OR
for EMAIL NOTIFICATIONS use this webhook listeners :
http://post-bot.appspot.com/post/email/{{ user_address }}


Specify the default copyright profile at the project level. The default profile applies to those project files
that do not belong to any defined scope. The default profile also applies when no specific profile-scope
combinations have been created.
By default, IntelliJ IDEA suggests No copyright.


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 It was a deep burgundy red and delicious-tasting, although it never seemed to do much for my cough.
Years later, when I got into drugs as a teenager (mostly weed), I began to experiment very occasionally with using the codeine cough syrup to get high. In college, I began to use other drugs such as LSD and mushrooms, and became a more or less daily pot smoker. I had a supply of codeine cough syrup (from home) but rarely if ever used it... until a couple of years after college when I went through a period of six months unemployment, at which time I rediscovered (or perhaps discovered for the first time) the joys of codeine.
I developed a certain discipline for maximizing the high, which entailed drinking a quart bottle of beer on a more-or-less empty stomach, and then ingesting four or five tablespoons of the syrup. This produced a very pleasant opiate-type high, affecting both mind and body. Fifteen to 20 minutes after ingestion, a deep feeling of relaxation and all-over warmth and peace ensues. It is very sweet.
I tend to be a highly anxious and worried individual, but there are no worries on codeine; the worries are chilled right out of my bones on a wave of gentle euphoria. The high lasts about two hours overall, with a peak period of about 30 to 45 minutes. The one notable side effect is a mild itchiness that comes on with the buzz, lasts the duration of the high, and then goes away. But when I'm high, the itch is not really a bother. It's rather pleasant, in fact, to scratch the itch, while my stoned mind is dwelling on other things.
It should be noted that the stuff is both psychologically and physically addictive, in a low-grade sort of way.
Psychologically, one is always craving the high, the altered state, which is more pleasant than reality. Physically, if I take it on a regular basis, I get mild withdrawal symptoms in the nature of a vague bodily dis-ease that is relieved only when I take the drug. I found I could only get one 'good' high per day; any attempt to do more than that was a waste of the drug. Because I loved the high so much, and wanted to maximize it, I used it somewhat parsimoniously, i.e., only once a day. Fortunately, I think, my supply ran out following that six-month period when I was using regularly. Thus, I never really had a chance to get 'hooked' in a serious way. But I really loved that stuff while it lasted, and I do believe I was hooked on it in a mild sort of way, and it was a definitely drag to stop using it.
On two occasions, I experienced a scary side of codeine.
Once, I went through my standard ritual of fasting for several hours, drinking a quart of beer, and then ingesting codeine. Then I went to a coffee shop with a friend and had a full, heavy meal (steak and french fries). Halfway through the meal, I started feeling very strange. I broke out in a cold sweat, and felt very lightheaded and flushed in my face. My field of vision became blurry on the sides and seemed to telescope. I could barely talk, and it was hard to breathe. Feeling very ill, I had to lay down in the booth, and almost passed out. My friend called an ambulance. By the time it arrived 20 mins. to half-an-hour later, I had basically recovered. The nasty paramedic asked me if I had been taking any drugs, which I denied. He gave me a brief check-up, and left. Although no harm was done, it was scary.
I felt like Mr. D had tapped me on the shoulder with his cold, bony fingertip.
Following this incident, I laid off the drug for a time. When I began to use it again, I always took care to have some food in my stomach, and never again experienced those symptoms.
Another time, I offered some to a friend, who was intrigued by my stories of what a pleasant buzz it was.
He drank the syrup in the back of the car one night when we were out partying, and after a few minutes went into a semi-coma of the type I had experienced in the restaurant. He couldn't talk, and was on the verge of passing out. I was really worried; he looked like death warmed over. But he recovered after about 20 minutes, and after that was fine (though he never wanted to do codeine again).
I haven't done the drug in years. I am still worried and anxious.
Experience Reports are the writings and opinions of the individual authors who submit them.
Some of the activities described are dangerous and/or illegal and none are recommended by Erowid.


Angle-resolved photoemission study of the band structure of EuSn 2P 2. (A, B) Band dispersion spectra along K−Γ–K taken with 76 and 96 eV photons differ mostly in the relative intensities of the bands due to photoemission selection-rule effects. (C) Incident photon energy 102 eV, shows a wide energy-range band dispersion spectrum along M−Γ–M.


Rasta is a system built to automatically identify the artistic style of a paiting from a picture of this painting. It can identify the style of any known or unknown painting. Currently, it can recognise 25 styles: Abstract Art, Abstract Expressionism, Art Informel, Art Nouveau (Modern), Baroque, Color Field Painting, Cubism, Early Renaissance, Expressionism, High Renaissance, Impressionism, Magic Realism, Mannerism (Late Renaissance), Minimalism, Naïve Art (Primitivism), Neoclassicism, Northern Renaissance, Pop Art, Post-Impressionism, Realism, Rococo, Romanticism, Surrealism, Symbolism and Ukiyo-e.
Rasta is based on recent advances on Deep Learning and was trained with a set of 60,000 paintings annotated with their style. When you submit a painting, Rasta will display what it considers to be the three most probable artistic style (represented as probabilities). Note: the example pictures on this webpage were not used to train the system, they are completely new to Rasta.
This work was published at the ACML conference. (Paper available here.)
Also have a look at the following publications (in french):