/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.examples.nio.client;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.concurrent.FutureCallback;
import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
import org.apache.http.impl.nio.client.HttpAsyncClients;
import org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager;
import org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor;
import org.apache.http.nio.conn.NHttpClientConnectionManager;
import org.apache.http.nio.reactor.ConnectingIOReactor;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
/**
* Example demonstrating how to evict expired and idle connections
* from the connection pool.
*/
public class AsyncClientEvictExpiredConnections {
public static void main(String[] args) throws Exception {
ConnectingIOReactor ioReactor = new DefaultConnectingIOReactor();
PoolingNHttpClientConnectionManager cm = new PoolingNHttpClientConnectionManager(ioReactor);
cm.setMaxTotal(100);
CloseableHttpAsyncClient httpclient = HttpAsyncClients.custom()
.setConnectionManager(cm)
.build();
try {
httpclient.start();
// create an array of URIs to perform GETs on
String[] urisToGet = {
"http://hc.apache.org/",
"http://hc.apache.org/httpcomponents-core-ga/",
"http://hc.apache.org/httpcomponents-client-ga/",
};
IdleConnectionEvictor connEvictor = new IdleConnectionEvictor(cm);
connEvictor.start();
final CountDownLatch latch = new CountDownLatch(urisToGet.length);
for (final String uri: urisToGet) {
final HttpGet httpget = new HttpGet(uri);
httpclient.execute(httpget, new FutureCallback<HttpResponse>() {
public void completed(final HttpResponse response) {
latch.countDown();
System.out.println(httpget.getRequestLine() + "->" + response.getStatusLine());
}
public void failed(final Exception ex) {
latch.countDown();
System.out.println(httpget.getRequestLine() + "->" + ex);
}
public void cancelled() {
latch.countDown();
System.out.println(httpget.getRequestLine() + " cancelled");
}
});
}
latch.await();
// Sleep 10 sec and let the connection evictor do its job
Thread.sleep(20000);
// Shut down the evictor thread
connEvictor.shutdown();
connEvictor.join();
} finally {
httpclient.close();
}
}
public static class IdleConnectionEvictor extends Thread {
private final NHttpClientConnectionManager connMgr;
private volatile boolean shutdown;
public IdleConnectionEvictor(NHttpClientConnectionManager connMgr) {
super();
this.connMgr = connMgr;
}
@Override
public void run() {
try {
while (!shutdown) {
synchronized (this) {
wait(5000);
// Close expired connections
connMgr.closeExpiredConnections();
// Optionally, close connections
// that have been idle longer than 5 sec
connMgr.closeIdleConnections(5, TimeUnit.SECONDS);
}
}
} catch (InterruptedException ex) {
// terminate
}
}
public void shutdown() {
shutdown = true;
synchronized (this) {
notifyAll();
}
}
}
}