com.sun.ejb.containers.util.pool
Class BoundedPool

java.lang.Object
  com.sun.ejb.containers.util.pool.AbstractPool
      com.sun.ejb.containers.util.pool.BoundedPool

All Implemented Interfaces:

Pool, EJBPoolStatsProvider, StatsProvider

public class BoundedPool
extends AbstractPool

Abstract pool provides the basic implementation of an object pool. The implementation uses a linked list to maintain a list of (available) objects. If the pool is empty it simply creates one using the ObjectFactory instance. Subclasses can change this behaviour by overriding getObject(...) and returnObject(....) methods. This class provides basic support for synchronization, event notification, pool shutdown and pool object recycling. It also does some very basic bookkeeping like the number of objects created, number of threads waiting for object.

Subclasses can make use of these book-keeping data to provide complex pooling mechanism like LRU / MRU / Random. Also, note that AbstractPool does not have a notion of pool limit. It is upto to the derived classes to implement these features.

Field Summary

protected int

previousSize

Fields inherited from class com.sun.ejb.containers.util.pool.AbstractPool

_logger, appName, beanId, configData, containerClassLoader, createdCount, destroyedCount, ejbName, factory, idleTimeoutInSeconds, list, maxPoolSize, maxWaitTimeInMillis, modName, poolName, poolProbeNotifier, poolReturned, poolSuccess, resizeQuantity, steadyPoolSize, waitCount

Constructor Summary

BoundedPool(ObjectFactory factory, long beanId, int steadyPoolSize, int resizeQuantity, int maxPoolsize, long maxWaitTimeInMillis, int idleTimeoutInSeconds, java.lang.ClassLoader loader)

Method Summary

protected void

removeIdleObjects()

Methods inherited from class com.sun.ejb.containers.util.pool.AbstractPool

appendStats, close, destroyObject, getAllAttrValues, getAllMonitoredAttrbuteValues, getCreatedCount, getDestroyedCount, getIdleTimeoutInSeconds, getJmsMaxMessagesLoad, getMaxPoolSize, getMaxWaitTimeInMillis, getNumBeansInPool, getNumThreadsWaiting, getObject, getObject, getObject, getPoolSuccess, getResizeQuantity, getSize, getSteadyPoolSize, getTotalBeansCreated, getTotalBeansDestroyed, getWaitCount, initializePool, preload, remove, returnObject, setConfigData, setContainerClassLoader, setInfo, unregisterProbeProvider

Methods inherited from class java.lang.Object

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

Field Detail

previousSize

protected int previousSize

Constructor Detail

BoundedPool

public BoundedPool(ObjectFactory factory,
                   long beanId,
                   int steadyPoolSize,
                   int resizeQuantity,
                   int maxPoolsize,
                   long maxWaitTimeInMillis,
                   int idleTimeoutInSeconds,
                   java.lang.ClassLoader loader)

Method Detail

removeIdleObjects

protected void removeIdleObjects()

Specified by:

removeIdleObjects in class AbstractPool