org.apache.commons.dbcp
Class AbandonedObjectPool

java.lang.Object
  org.apache.commons.pool.BaseObjectPool
      org.apache.commons.pool.impl.GenericObjectPool
          org.apache.commons.dbcp.AbandonedObjectPool

All Implemented Interfaces:

org.apache.commons.pool.ObjectPool

public class AbandonedObjectPool
extends org.apache.commons.pool.impl.GenericObjectPool

An implementation of a Jakarta-Commons ObjectPool which tracks JDBC connections and can recover abandoned db connections. If logAbandoned=true, a stack trace will be printed for any abandoned db connections recovered.

Version:

$Revision: 899987 $ $Date: 2010-01-16 11:51:16 -0500 (Sat, 16 Jan 2010) $

Author:

Glenn L. Nielsen

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.commons.pool.impl.GenericObjectPool

org.apache.commons.pool.impl.GenericObjectPool.Config

Field Summary

Fields inherited from class org.apache.commons.pool.impl.GenericObjectPool

DEFAULT_LIFO, DEFAULT_MAX_ACTIVE, DEFAULT_MAX_IDLE, DEFAULT_MAX_WAIT, DEFAULT_MIN_EVICTABLE_IDLE_TIME_MILLIS, DEFAULT_MIN_IDLE, DEFAULT_NUM_TESTS_PER_EVICTION_RUN, DEFAULT_SOFT_MIN_EVICTABLE_IDLE_TIME_MILLIS, DEFAULT_TEST_ON_BORROW, DEFAULT_TEST_ON_RETURN, DEFAULT_TEST_WHILE_IDLE, DEFAULT_TIME_BETWEEN_EVICTION_RUNS_MILLIS, DEFAULT_WHEN_EXHAUSTED_ACTION, WHEN_EXHAUSTED_BLOCK, WHEN_EXHAUSTED_FAIL, WHEN_EXHAUSTED_GROW

Constructor Summary

AbandonedObjectPool(org.apache.commons.pool.PoolableObjectFactory factory, AbandonedConfig config)
Create an ObjectPool which tracks db connections.

Method Summary

java.lang.Object	borrowObject() Get a db connection from the pool.
void	invalidateObject(java.lang.Object obj) Invalidates an object from the pool.
void	returnObject(java.lang.Object obj) Return a db connection to the pool.

Methods inherited from class org.apache.commons.pool.impl.GenericObjectPool

addObject, clear, close, evict, getLifo, getMaxActive, getMaxIdle, getMaxWait, getMinEvictableIdleTimeMillis, getMinIdle, getNumActive, getNumIdle, getNumTestsPerEvictionRun, getSoftMinEvictableIdleTimeMillis, getTestOnBorrow, getTestOnReturn, getTestWhileIdle, getTimeBetweenEvictionRunsMillis, getWhenExhaustedAction, setConfig, setFactory, setLifo, setMaxActive, setMaxIdle, setMaxWait, setMinEvictableIdleTimeMillis, setMinIdle, setNumTestsPerEvictionRun, setSoftMinEvictableIdleTimeMillis, setTestOnBorrow, setTestOnReturn, setTestWhileIdle, setTimeBetweenEvictionRunsMillis, setWhenExhaustedAction

Methods inherited from class org.apache.commons.pool.BaseObjectPool

isClosed

Methods inherited from class java.lang.Object

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

Constructor Detail

AbandonedObjectPool

public AbandonedObjectPool(org.apache.commons.pool.PoolableObjectFactory factory,
                           AbandonedConfig config)

Create an ObjectPool which tracks db connections.

Parameters:

factory - PoolableObjectFactory used to create this

config - configuration for abandoned db connections

Method Detail

borrowObject

public java.lang.Object borrowObject()
                              throws java.lang.Exception

Get a db connection from the pool. If removeAbandoned=true, recovers db connections which have been idle > removeAbandonedTimeout and getNumActive() > getMaxActive() - 3 and getNumIdle() < 2

Specified by:

borrowObject in interface org.apache.commons.pool.ObjectPool

Overrides:

borrowObject in class org.apache.commons.pool.impl.GenericObjectPool

Returns:

Object jdbc Connection

Throws:

java.lang.Exception - if an exception occurs retrieving a connection from the pool

invalidateObject

public void invalidateObject(java.lang.Object obj)
                      throws java.lang.Exception

Invalidates an object from the pool.

Specified by:

invalidateObject in interface org.apache.commons.pool.ObjectPool

Overrides:

invalidateObject in class org.apache.commons.pool.impl.GenericObjectPool

Parameters:

obj - object to be returned

Throws:

java.lang.Exception - if an exception occurs invalidating the object

returnObject

public void returnObject(java.lang.Object obj)
                  throws java.lang.Exception

Return a db connection to the pool.

Specified by:

returnObject in interface org.apache.commons.pool.ObjectPool

Overrides:

returnObject in class org.apache.commons.pool.impl.GenericObjectPool

Parameters:

obj - db Connection to return

Throws:

java.lang.Exception - if an exception occurs returning the connection to the pool