org.apache.tomcat.dbcp.pool2.impl

Class DefaultEvictionPolicy<T>

java.lang.Object

org.apache.tomcat.dbcp.pool2.impl.DefaultEvictionPolicy<T>

Type Parameters:

T - the type of objects in the pool

All Implemented Interfaces:

EvictionPolicy<T>

public class DefaultEvictionPolicy<T>
extends Object
implements EvictionPolicy<T>

Provides the default implementation of EvictionPolicy used by the pools. Objects will be evicted if the following conditions are met:

• the object has been idle longer than BaseGenericObjectPool.getMinEvictableIdleTimeMillis() / BaseGenericObjectPool.getMinEvictableIdleTimeMillis()
• there are more than GenericObjectPool.getMinIdle() / GenericKeyedObjectPoolConfig.getMinIdlePerKey() idle objects in the pool and the object has been idle for longer than BaseGenericObjectPool.getSoftMinEvictableIdleTimeMillis() / BaseGenericObjectPool.getSoftMinEvictableIdleTimeMillis()

This class is immutable and thread-safe.

Since:

2.0

Constructor Summary

Constructors

Constructor and Description
DefaultEvictionPolicy()

Method Summary

Modifier and Type	Method and Description
boolean	evict(EvictionConfig config, PooledObject<T> underTest, int idleCount) This method is called to test if an idle object in the pool should be evicted or not.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultEvictionPolicy

public DefaultEvictionPolicy()

Method Detail

evict

public boolean evict(EvictionConfig config,
                     PooledObject<T> underTest,
                     int idleCount)

Description copied from interface: EvictionPolicy

This method is called to test if an idle object in the pool should be evicted or not.

Specified by:

evict in interface EvictionPolicy<T>

Parameters:

config - The pool configuration settings related to eviction

underTest - The pooled object being tested for eviction

idleCount - The current number of idle objects in the pool including the object under test

Returns:

true if the object should be evicted, otherwise false