| /* |
| * ==================================================================== |
| * |
| * 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.client; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.http.HttpEntity; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.client.HttpClient; |
| import org.apache.http.client.methods.HttpGet; |
| import org.apache.http.conn.ClientConnectionManager; |
| import org.apache.http.impl.client.DefaultHttpClient; |
| import org.apache.http.impl.conn.PoolingClientConnectionManager; |
| import org.apache.http.util.EntityUtils; |
| |
| /** |
| * Example demonstrating how to evict expired and idle connections |
| * from the connection pool. |
| */ |
| public class ClientEvictExpiredConnections { |
| |
| public static void main(String[] args) throws Exception { |
| PoolingClientConnectionManager cm = new PoolingClientConnectionManager(); |
| cm.setMaxTotal(100); |
| |
| HttpClient httpclient = new DefaultHttpClient(cm); |
| try { |
| // create an array of URIs to perform GETs on |
| String[] urisToGet = { |
| "http://jakarta.apache.org/", |
| "http://jakarta.apache.org/commons/", |
| "http://jakarta.apache.org/commons/httpclient/", |
| "http://svn.apache.org/viewvc/jakarta/httpcomponents/" |
| }; |
| |
| IdleConnectionEvictor connEvictor = new IdleConnectionEvictor(cm); |
| connEvictor.start(); |
| |
| for (int i = 0; i < urisToGet.length; i++) { |
| String requestURI = urisToGet[i]; |
| HttpGet req = new HttpGet(requestURI); |
| |
| System.out.println("executing request " + requestURI); |
| |
| HttpResponse rsp = httpclient.execute(req); |
| HttpEntity entity = rsp.getEntity(); |
| |
| System.out.println("----------------------------------------"); |
| System.out.println(rsp.getStatusLine()); |
| if (entity != null) { |
| System.out.println("Response content length: " + entity.getContentLength()); |
| } |
| System.out.println("----------------------------------------"); |
| |
| EntityUtils.consume(entity); |
| } |
| |
| // Sleep 10 sec and let the connection evictor do its job |
| Thread.sleep(20000); |
| |
| // Shut down the evictor thread |
| connEvictor.shutdown(); |
| connEvictor.join(); |
| |
| } finally { |
| // When HttpClient instance is no longer needed, |
| // shut down the connection manager to ensure |
| // immediate deallocation of all system resources |
| httpclient.getConnectionManager().shutdown(); |
| } |
| } |
| |
| public static class IdleConnectionEvictor extends Thread { |
| |
| private final ClientConnectionManager connMgr; |
| |
| private volatile boolean shutdown; |
| |
| public IdleConnectionEvictor(ClientConnectionManager 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(); |
| } |
| } |
| |
| } |
| |
| } |