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Tomcat example source code file (ConcurrentCache.java)

This example Tomcat source code file (ConcurrentCache.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

concurrentcache, concurrentcache, concurrenthashmap, concurrenthashmap, map, map, threading, threads, util, v, v, weakhashmap

The Tomcat ConcurrentCache.java source code

/*
 * 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.el.util;

import java.util.Map;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;

public final class ConcurrentCache<K,V> {

	private final int size;
	
	private final Map<K,V> eden;
	
	private final Map<K,V> longterm;
	
	public ConcurrentCache(int size) {
		this.size = size;
		this.eden = new ConcurrentHashMap<K,V>(size);
		this.longterm = new WeakHashMap<K,V>(size);
	}
	
	public V get(K k) {
		V v = this.eden.get(k);
		if (v == null) {
			v = this.longterm.get(k);
			if (v != null) {
				this.eden.put(k, v);
			}
		}
		return v;
	}
	
	public void put(K k, V v) {
		if (this.eden.size() >= size) {
			this.longterm.putAll(this.eden);
			this.eden.clear();
		}
		this.eden.put(k, v);
	}
}

Other Tomcat examples (source code examples)

Here is a short list of links related to this Tomcat ConcurrentCache.java source code file:



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