objectpooling.java

来自「基于corba的资源池,实现了实例池供客户端调用,并且实例池对实例的分配采用策略」· Java 代码 · 共 64 行

//实例池类
package pool;

/**
 * 实例池类
 * @author XuYing
 *
 */
public class ObjectPooling extends AbstractObjectPool
{
	public ObjectPooling(SelectorStrategy s)
	{
		super(s);
		// TODO Auto-generated constructor stub
	}
	
	/**
	 * 申请获取资源, 如遇资源没有, 则阻塞
	 */
	public synchronized Object checkOut(String id)
	{
		Object po = super.checkOut(id);
		if (null == po) {
			try {
				//实例池到一定规模就全部清空
				if(usedPooledObjects.size()>(maxPoolSize-minPoolSize)){
					super.expire();
				}else{
					wait();
				}
			} catch (/*InterruptedException*/Exception e) {
				// TODO Auto-generated catch block
				System.err.println("InterruptedException");
				System.err.println(e.getMessage());
				e.printStackTrace();
			}
			// try again
			return checkOut(id);
		}
		return po;
	}
	
	/**
	 * 释放资源, 并通知其他线程
	 */
	public synchronized void checkIn(Object o) 
	{
		super.checkIn(o);
		notifyAll();
	}
	
	public Object create()
	{
		return pof.newInstance();
	}
	
	public boolean validate( Object o ,String id)
	{
		if(((interfaceImpl.AccountImpl)o).getId().equals(id))
			return true;
		else return false;
	}
}