org.objectweb.cjdbc.controller.connection
Class FailFastPoolConnectionManager

java.lang.Object
  extended byorg.objectweb.cjdbc.controller.connection.AbstractConnectionManager
      extended byorg.objectweb.cjdbc.controller.connection.AbstractPoolConnectionManager
          extended byorg.objectweb.cjdbc.controller.connection.FailFastPoolConnectionManager
All Implemented Interfaces:
java.io.Serializable

public class FailFastPoolConnectionManager
extends AbstractPoolConnectionManager
implements java.io.Serializable

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
See Also:
Serialized Form

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, initialized, logger, rLogin, rPassword
 
Constructor Summary
FailFastPoolConnectionManager(java.lang.String backendUrl, java.lang.String backendName, java.lang.String login, java.lang.String password, int poolSize)
          Creates a new FailFastPoolConnectionManager instance.
 
Method Summary
 java.sql.Connection getConnection()
          Gets a connection from the pool.
 java.lang.String getInformation()
          Gets information about this connection manager
 java.lang.String getXmlInformation()
          Gets xml formatted information on this connection manager
 void releaseConnection(java.sql.Connection c)
          Releases a connection and puts it back to the pool.
 
Methods inherited from class org.objectweb.cjdbc.controller.connection.AbstractPoolConnectionManager
finalizeConnections, initializeConnections, initializeConnections
 
Methods inherited from class org.objectweb.cjdbc.controller.connection.AbstractConnectionManager
finalize, getConnection, getLogin, getPassword, isInitialized, releaseConnection, retrieveConnection, setLogin, setPassword
 
Methods inherited from class java.lang.Object
clone, 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,
                                     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
poolSize - size of the connection pool
Method Detail

getConnection

public java.sql.Connection getConnection()
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
See Also:
AbstractConnectionManager.getConnection()

releaseConnection

public void releaseConnection(java.sql.Connection c)
Description copied from class: AbstractPoolConnectionManager
Releases a connection and puts it back to the pool. Note that the connection is not closed but only returns to the free connections pool.

Specified by:
releaseConnection in class AbstractPoolConnectionManager
Parameters:
c - the connection to release.
See Also:
AbstractPoolConnectionManager.releaseConnection(Connection)

getXmlInformation

public java.lang.String getXmlInformation()
Description copied from class: AbstractConnectionManager
Gets xml formatted information on this connection manager

Specified by:
getXmlInformation in class AbstractConnectionManager
Returns:
xml formatted string that conforms to c-jdbc.dtd
See Also:
AbstractConnectionManager.getXmlInformation()

getInformation

public java.lang.String getInformation()
Description copied from class: AbstractConnectionManager
Gets information about this connection manager

Specified by:
getInformation in class AbstractConnectionManager
Returns:
a String value containing information.
See Also:
AbstractConnectionManager.getInformation()


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