monasca.common.middleware.HttpPoolCleaner.java Source code

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Here is the source code for monasca.common.middleware.HttpPoolCleaner.java

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/*
 * Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
 * 
 * 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 monasca.common.middleware;

import java.util.concurrent.TimeUnit;

import org.apache.http.conn.ClientConnectionManager;

/**
 * A runner to clean the connection pool! There should only be one!
 * 
 * @author liemmn
 * 
 */
public class HttpPoolCleaner implements Runnable {
    private final ClientConnectionManager connMgr;
    private long timeBetweenEvictionRunsMillis, minEvictableIdleTimeMillis;
    private volatile boolean shutdown;

    public HttpPoolCleaner(ClientConnectionManager connMgr, long timeBetweenEvictionRunsMillis,
            long minEvictableIdleTimeMillis) {
        this.connMgr = connMgr;
        this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
        this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
    }

    /**
     * Start the cleaner.
     */
    @Override
    public void run() {
        try {
            while (!shutdown) {
                synchronized (this) {
                    wait(timeBetweenEvictionRunsMillis);
                    // Close expired connections
                    connMgr.closeExpiredConnections();
                    // Close connections that have been idle longer than x sec
                    connMgr.closeIdleConnections(minEvictableIdleTimeMillis, TimeUnit.MILLISECONDS);
                }
            }
        } catch (InterruptedException ex) {
            // terminate
        }
    }

    /**
     * Shutdown the cleaner.
     */
    public void shutdown() {
        shutdown = true;
        synchronized (this) {
            notifyAll();
        }
    }

}