org.logicalcobwebs.proxool
Interface ConnectionListenerIF

All Known Implementing Classes:

CompositeConnectionListener

public interface ConnectionListenerIF

You can listen to the lifecycle of a connection. Sometimes, you may want to perform a task when the connection is born or dies. Actually, the reason why we originally did this is now obsolete. But the code remains here just in case. You need to register your implementation with ProxoolFacade.

 String alias = "myPool";
 ConnectionListenerIF myConnectionListener = new MyConnectionListener();
 ProxoolFacade.addConnectionListener(alias, myConnectionListener);
 

Version:

$Revision: 1.7 $, $Date: 2003/03/03 11:11:57 $

Author:

billhorsman, $Author: billhorsman $ (current maintainer)

Method Summary

void	onBirth(java.sql.Connection connection) Happens everytime we create a new connection.
void	onDeath(java.sql.Connection connection) Happens just before we expire a connection.
void	onExecute(java.lang.String command, long elapsedTime) Happens after every successful execute.
void	onFail(java.lang.String command, java.lang.Exception exception) Happens everytime an exception was thrown during an execute method Note that the command is not fully implemented at this stage.

Method Detail

onBirth

void onBirth(java.sql.Connection connection)
             throws java.sql.SQLException

Happens everytime we create a new connection. You can use this to allocate resources to a connection that might be useful during the lifetime of the connection.

Parameters:

connection - the connection that has just been created

Throws:

java.sql.SQLException - if anything goes wrong (which will then be logged but ignored)

onDeath

void onDeath(java.sql.Connection connection)
             throws java.sql.SQLException

Happens just before we expire a connection. You can use this to reclaim resources from a connection.

Parameters:

connection - the connection that is about to expire

Throws:

java.sql.SQLException - if anything goes wrong (which will then be logged but ignored)

onExecute

void onExecute(java.lang.String command,
               long elapsedTime)

Happens after every successful execute. Note that the command is not fully implemented at this stage. At some point it might represent the SQL that is sent to the database (or the procedure call that was used).

Parameters:

command - what command was being executed

elapsedTime - how long the call took (in milliseconds)

onFail

void onFail(java.lang.String command,
            java.lang.Exception exception)

Happens everytime an exception was thrown during an execute method Note that the command is not fully implemented at this stage. At some point it might represent the SQL that is sent to the database (or the procedure call that was used).

Parameters:

command - what command was being executed

exception - what exception was thrown