/*
* Copyright 2014 NAVER Corp.
*
* Licensed 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 com.navercorp.pinpoint.profiler.instrument.classpool;
import javassist.ClassPath;
import javassist.LoaderClassPath;
import java.util.Map;
import java.util.WeakHashMap;
/**
* @author emeroad
*/
public class SingleClassPool implements MultipleClassPool {
private static final Object EXIST = new Object();
private final NamedClassPool classPool;
private final Map<ClassLoader, Object> checker = new WeakHashMap<ClassLoader, Object>();
public SingleClassPool() {
this.classPool = new NamedClassPool("singlePool");
this.classPool.appendSystemPath();
}
@Override
public NamedClassPool getClassPool(ClassLoader classLoader) {
synchronized (classPool) {
final Object hit = this.checker.get(classLoader);
if (hit != null) {
return classPool;
}
this.checker.put(classLoader, EXIST);
final ClassPath classPath = new LoaderClassPath(classLoader);
this.classPool.appendClassPath(classPath);
return classPool;
}
}
}