org.objectweb.cjdbc.controller.connection
Class FailFastPoolConnectionManager

java.lang.Object
  org.objectweb.cjdbc.controller.connection.AbstractConnectionManager
      org.objectweb.cjdbc.controller.connection.AbstractPoolConnectionManager
          org.objectweb.cjdbc.controller.connection.FailFastPoolConnectionManager

All Implemented Interfaces:

java.lang.Cloneable, XmlComponent

public class FailFastPoolConnectionManager

extends AbstractPoolConnectionManager

This connection manager returns null when the pool is empty. Therefore all requests fail fast until connections are freed.

Version:

1.0

Author:

Emmanuel Cecchet , Nicolas Modrzyk

Field Summary

Fields inherited from class org.objectweb.cjdbc.controller.connection.AbstractPoolConnectionManager

activeConnections, freeConnections, poolSize

Fields inherited from class org.objectweb.cjdbc.controller.connection.AbstractConnectionManager

backendName, backendUrl, driverClassName, driverPath, initialized, logger, rLogin, rPassword

Fields inherited from interface org.objectweb.cjdbc.common.xml.XmlComponent

DOCTYPE_CONTROLLER, DOCTYPE_DB, XML_VERSION

Constructor Summary

FailFastPoolConnectionManager(java.lang.String backendUrl, java.lang.String backendName, java.lang.String login, java.lang.String password, java.lang.String driverPath, java.lang.String driverClassName, int poolSize)
Creates a new FailFastPoolConnectionManager instance.

Method Summary

protected java.lang.Object	clone()
void	deleteConnection(java.sql.Connection c) Delete a connection that is no more valid.
java.sql.Connection	getConnection() Gets a connection from the pool.
java.lang.String	getXmlImpl() Gets xml formatted information on this connection manager
void	releaseConnection(java.sql.Connection c) Releases a connection.

Methods inherited from class org.objectweb.cjdbc.controller.connection.AbstractPoolConnectionManager

finalizeConnections, getCurrentNumberOfConnections, initializeConnections, initializeConnections

Methods inherited from class org.objectweb.cjdbc.controller.connection.AbstractConnectionManager

copy, deleteConnection, finalize, getConnection, getConnectionFromDriver, getDriverClassName, getDriverPath, getLogin, getPassword, getVLogin, getXml, isInitialized, releaseConnection, retrieveConnection, setDriverClassName, setDriverPath, setLogin, setPassword, setVLogin

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FailFastPoolConnectionManager

public FailFastPoolConnectionManager(java.lang.String backendUrl,
                                     java.lang.String backendName,
                                     java.lang.String login,
                                     java.lang.String password,
                                     java.lang.String driverPath,
                                     java.lang.String driverClassName,
                                     int poolSize)

Creates a new FailFastPoolConnectionManager instance.

Parameters:

backendUrl - URL of the DatabaseBackend owning this connection manager

backendName - name of the DatabaseBackend owning this connection manager

login - backend connection login to be used by this connection manager

password - backend connection password to be used by this connection manager

driverPath - path for driver

driverClassName - class name for driver

poolSize - size of the connection pool

Method Detail

getConnection

public java.sql.Connection getConnection()
                                  throws UnreachableBackendException

Gets a connection from the pool. Returns null if the pool is empty.

Specified by:

getConnection in class AbstractConnectionManager

Returns:

a connection from the pool or null if the pool is exhausted

Throws:

UnreachableBackendException - if the backend must be disabled

See Also:

AbstractConnectionManager.getConnection()

releaseConnection

public void releaseConnection(java.sql.Connection c)

Description copied from class: AbstractConnectionManager

Releases a connection.

Specified by:

releaseConnection in class AbstractConnectionManager

Parameters:

c - the connection to release.

See Also:

AbstractConnectionManager.releaseConnection(Connection)

deleteConnection

public void deleteConnection(java.sql.Connection c)

Description copied from class: AbstractConnectionManager

Delete a connection that is no more valid.

Specified by:

deleteConnection in class AbstractConnectionManager

Parameters:

c - the connection to delete.

See Also:

AbstractConnectionManager.deleteConnection(Connection)

getXmlImpl

public java.lang.String getXmlImpl()

Description copied from class: AbstractConnectionManager

Gets xml formatted information on this connection manager

Specified by:

getXmlImpl in class AbstractConnectionManager

Returns:

xml formatted string that conforms to c-jdbc.dtd

See Also:

AbstractConnectionManager.getXmlImpl()

clone

protected java.lang.Object clone()
                          throws java.lang.CloneNotSupportedException

Specified by:

clone in class AbstractConnectionManager

Throws:

java.lang.CloneNotSupportedException

See Also:

Object.clone()