1 /* 2 * ==================================================================== 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * ==================================================================== 20 * 21 * This software consists of voluntary contributions made by many 22 * individuals on behalf of the Apache Software Foundation. For more 23 * information on the Apache Software Foundation, please see 24 * <http://www.apache.org/>. 25 * 26 */ 27 28 package org.apache.hc.client5.http.examples; 29 30 import java.io.IOException; 31 import java.io.InputStream; 32 33 import org.apache.hc.client5.http.classic.methods.HttpGet; 34 import org.apache.hc.client5.http.impl.classic.CloseableHttpClient; 35 import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse; 36 import org.apache.hc.client5.http.impl.classic.HttpClients; 37 import org.apache.hc.core5.http.HttpEntity; 38 39 /** 40 * This example demonstrates the recommended way of using API to make sure 41 * the underlying connection gets released back to the connection manager. 42 */ 43 public class ClientConnectionRelease { 44 45 public final static void main(final String[] args) throws Exception { 46 try (final CloseableHttpClient httpclient = HttpClients.createDefault()) { 47 final HttpGet httpget = new HttpGet("http://httpbin.org/get"); 48 49 System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri()); 50 try (final CloseableHttpResponse response = httpclient.execute(httpget)) { 51 System.out.println("----------------------------------------"); 52 System.out.println(response.getCode() + " " + response.getReasonPhrase()); 53 54 // Get hold of the response entity 55 final HttpEntity entity = response.getEntity(); 56 57 // If the response does not enclose an entity, there is no need 58 // to bother about connection release 59 if (entity != null) { 60 try (final InputStream inStream = entity.getContent()) { 61 inStream.read(); 62 // do something useful with the response 63 } catch (final IOException ex) { 64 // In case of an IOException the connection will be released 65 // back to the connection manager automatically 66 throw ex; 67 } 68 } 69 } 70 } 71 } 72 73 } 74