package safeluck.drive.evaluation.cEventCenter;
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/**
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* 自定义的对象池
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* MyApplication2
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* Created by lzw on 2019/12/30. 17:06:49
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* 邮箱：632393724@qq.com
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* All Rights Saved! Chongqing AnYun Tech co. LTD
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*/
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public abstract class ObjectPool<T extends PooledObject> {
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private T[] mContainer;//对象容器
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private final Object LOCK = new Object();//对象锁
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private int length;//每次返回对象都放到数据末端，length表示前面可用对象数
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public ObjectPool(int capacity) {
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mContainer = createObjPool(capacity);
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}
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/**
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* 创建对象池
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* @param capacity 最大限度容量
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* @return
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*/
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protected abstract T[] createObjPool(int capacity) ;
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/**
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* 创建一个新的对象
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* @return
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*/
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protected abstract T createNewObj();
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public final T get(){
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//先从池中找到空闲的对象，如果没有，则重新创建一个对象
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T obj = findFreeObject();
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if (null == obj){
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obj = createNewObj();
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}else{
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obj.reset();
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}
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return obj;
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}
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/**
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* 从池中找到空闲的对象
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* @return
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*/
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private T findFreeObject() {
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T obj = null;
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synchronized (LOCK){
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if (length > 0 ){
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--length;
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obj = mContainer[length];
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//赋值完成后释放资源
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mContainer[length] = null;
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}
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}
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return obj;
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}
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}
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