org.apache.cxf.common.util.factory.CachingPool Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.cxf.common.util.factory;
/**
* A thread-unsafe implementation of Pool that does simple caching.
*
*
* @author Ben Yu Feb 2, 2006 12:13:08 PM
*/
public class CachingPool implements Pool {
private transient Object v;
private transient boolean pooled;
private void readObject(java.io.ObjectInputStream in) throws ClassNotFoundException, java.io.IOException {
in.defaultReadObject();
this.pooled = false;
}
public Object getInstance(Factory factory) throws Throwable {
if (!pooled) {
v = factory.create();
pooled = true;
}
return v;
}
public Object getPooledInstance(Object def) {
return pooled ? v : def;
}
/**
* Is this pool currently having something in cache?
*/
public boolean isPooled() {
return pooled;
}
}