ch.agent.crnickl.jdbc

Class JDBCSession

java.lang.Object

ch.agent.crnickl.jdbc.JDBCSession

public class JDBCSession
extends Object

JDBCSession is a singleton keeping track of the JDBC connection.

Author:

Jean-Paul Vetterli

Field Summary

Fields

Modifier and Type	Field and Description
static String	JDBC_DB
static String	JDBC_DRIVER
static String	JDBC_PASSWORD
static String	JDBC_URL
static String	JDBC_USER

Constructor Summary

Constructors

Constructor and Description
JDBCSession(ch.agent.crnickl.api.DatabaseConfiguration configuration) Construct a JDBC session.

Method Summary

Modifier and Type	Method and Description
void	close(boolean ignoreException) Close the JDBC connection if it is open.
void	commit() Commit the current transaction.
Connection	getConnection() Return the JDBC connection.
static JDBCSession	getInstance() Return the JDBC session.
String	getURL() Return the URL of the session.
String	getUser() Return the user id of the session.
void	rollback() Rollback the current transaction.
static void	rollbackIfAlive() Perform a rollback if there is a session, else do nothing.
String	toString() Return a string displaying the session with the URL and the user id.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

JDBC_DRIVER

public static final String JDBC_DRIVER

See Also:

Constant Field Values

JDBC_URL

public static final String JDBC_URL

See Also:

Constant Field Values

JDBC_DB

public static final String JDBC_DB

See Also:

Constant Field Values

JDBC_USER

public static final String JDBC_USER

See Also:

Constant Field Values

JDBC_PASSWORD

public static final String JDBC_PASSWORD

See Also:

Constant Field Values

Constructor Detail

JDBCSession

public JDBCSession(ch.agent.crnickl.api.DatabaseConfiguration configuration)

Construct a JDBC session. This constructor can be invoked only once.

Parameters:

configuration - a database configuration

Method Detail

getInstance

public static JDBCSession getInstance()

Return the JDBC session.

Returns:

the JDBC session

rollbackIfAlive

public static void rollbackIfAlive()

Perform a rollback if there is a session, else do nothing. Catch and discard any exception.

close

public void close(boolean ignoreException)
           throws ch.agent.crnickl.T2DBException

Close the JDBC connection if it is open.

Throws:

ch.agent.crnickl.T2DBException

getConnection

public Connection getConnection()
                         throws ch.agent.crnickl.T2DBException

Return the JDBC connection. If there is no connection, open one.

Returns:

a JDBC connection

Throws:

ch.agent.crnickl.T2DBException

commit

public void commit()
            throws ch.agent.crnickl.T2DBException

Commit the current transaction.

Throws:

ch.agent.crnickl.T2DBException

rollback

public void rollback()
              throws ch.agent.crnickl.T2DBException

Rollback the current transaction.

Throws:

ch.agent.crnickl.T2DBException

getURL

public String getURL()

Return the URL of the session.

Returns:

the URL

getUser

public String getUser()

Return the user id of the session.

Returns:

the user id

toString

public String toString()

Return a string displaying the session with the URL and the user id.

Overrides:

toString in class Object

Returns:

a string displaying the session