StringCache.java example

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/*
 * Copyright 2011-2013 HTTL Team.
 *  
 * 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 httl.util;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicLong;

public class StringCache {

    private static final AtomicLong IDS = new AtomicLong();

    private static final ConcurrentMap<String, String> cache = new ConcurrentHashMap<String, String>();

    public static String put(String source) {
        String id = String.valueOf(IDS.incrementAndGet());
        cache.putIfAbsent(id, source);
        return id;
    }

    public static String getAndRemove(String id) {
        return cache.remove(id);
    }

}