1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/conn/AbstractPooledConnAdapter.java $ 3 * $Revision: 658775 $ 4 * $Date: 2008-05-21 10:30:45 -0700 (Wed, 21 May 2008) $ 5 * 6 * ==================================================================== 7 * 8 * Licensed to the Apache Software Foundation (ASF) under one or more 9 * contributor license agreements. See the NOTICE file distributed with 10 * this work for additional information regarding copyright ownership. 11 * The ASF licenses this file to You under the Apache License, Version 2.0 12 * (the "License"); you may not use this file except in compliance with 13 * the License. You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, software 18 * distributed under the License is distributed on an "AS IS" BASIS, 19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 20 * See the License for the specific language governing permissions and 21 * limitations under the License. 22 * ==================================================================== 23 * 24 * This software consists of voluntary contributions made by many 25 * individuals on behalf of the Apache Software Foundation. For more 26 * information on the Apache Software Foundation, please see 27 * <http://www.apache.org/>. 28 * 29 */ 30 31 package org.apache.http.impl.conn; 32 33 34 import java.io.IOException; 35 36 import org.apache.http.HttpHost; 37 import org.apache.http.params.HttpParams; 38 import org.apache.http.protocol.HttpContext; 39 import org.apache.http.conn.routing.HttpRoute; 40 import org.apache.http.conn.ClientConnectionManager; 41 import org.apache.http.conn.OperatedClientConnection; 42 43 44 45 /** 46 * Abstract adapter from pool {@link AbstractPoolEntry entries} to 47 * {@link org.apache.http.conn.ManagedClientConnection managed} 48 * client connections. 49 * The connection in the pool entry is used to initialize the base class. 50 * In addition, methods to establish a route are delegated to the 51 * pool entry. {@link #shutdown shutdown} and {@link #close close} 52 * will clear the tracked route in the pool entry and call the 53 * respective method of the wrapped connection. 54 * 55 * @author <a href="mailto:rolandw at apache.org">Roland Weber</a> 56 * 57 * 58 * <!-- empty lines to avoid svn diff problems --> 59 * @version $Revision: 658775 $ $Date: 2008-05-21 10:30:45 -0700 (Wed, 21 May 2008) $ 60 * 61 * @since 4.0 62 */ 63 public abstract class AbstractPooledConnAdapter extends AbstractClientConnAdapter { 64 65 /** The wrapped pool entry. */ 66 protected volatile AbstractPoolEntry poolEntry; 67 68 69 /** 70 * Creates a new connection adapter. 71 * 72 * @param manager the connection manager 73 * @param entry the pool entry for the connection being wrapped 74 */ 75 protected AbstractPooledConnAdapter(ClientConnectionManager manager, 76 AbstractPoolEntry entry) { 77 super(manager, entry.connection); 78 this.poolEntry = entry; 79 } 80 81 82 /** 83 * Asserts that this adapter is still attached. 84 * 85 * @throws IllegalStateException 86 * if it is {@link #detach detach}ed 87 */ 88 protected final void assertAttached() { 89 if (poolEntry == null) { 90 throw new IllegalStateException("Adapter is detached."); 91 } 92 } 93 94 /** 95 * Detaches this adapter from the wrapped connection. 96 * This adapter becomes useless. 97 */ 98 @Override 99 protected void detach() { 100 super.detach(); 101 poolEntry = null; 102 } 103 104 105 // non-javadoc, see interface ManagedHttpConnection 106 public HttpRoute getRoute() { 107 108 assertAttached(); 109 return (poolEntry.tracker == null) ? 110 null : poolEntry.tracker.toRoute(); 111 } 112 113 // non-javadoc, see interface ManagedHttpConnection 114 public void open(HttpRoute route, 115 HttpContext context, HttpParams params) 116 throws IOException { 117 118 assertAttached(); 119 poolEntry.open(route, context, params); 120 } 121 122 123 // non-javadoc, see interface ManagedHttpConnection 124 public void tunnelTarget(boolean secure, HttpParams params) 125 throws IOException { 126 127 assertAttached(); 128 poolEntry.tunnelTarget(secure, params); 129 } 130 131 132 // non-javadoc, see interface ManagedHttpConnection 133 public void tunnelProxy(HttpHost next, boolean secure, HttpParams params) 134 throws IOException { 135 136 assertAttached(); 137 poolEntry.tunnelProxy(next, secure, params); 138 } 139 140 141 // non-javadoc, see interface ManagedHttpConnection 142 public void layerProtocol(HttpContext context, HttpParams params) 143 throws IOException { 144 145 assertAttached(); 146 poolEntry.layerProtocol(context, params); 147 } 148 149 150 151 // non-javadoc, see interface HttpConnection 152 public void close() throws IOException { 153 if (poolEntry != null) 154 poolEntry.shutdownEntry(); 155 156 OperatedClientConnection conn = getWrappedConnection(); 157 if (conn != null) { 158 conn.close(); 159 } 160 } 161 162 // non-javadoc, see interface HttpConnection 163 public void shutdown() throws IOException { 164 if (poolEntry != null) 165 poolEntry.shutdownEntry(); 166 167 OperatedClientConnection conn = getWrappedConnection(); 168 if (conn != null) { 169 conn.shutdown(); 170 } 171 } 172 173 174 // non-javadoc, see interface ManagedClientConnection 175 public Object getState() { 176 assertAttached(); 177 return poolEntry.getState(); 178 } 179 180 181 // non-javadoc, see interface ManagedClientConnection 182 public void setState(final Object state) { 183 assertAttached(); 184 poolEntry.setState(state); 185 } 186 187 188 } // class AbstractPooledConnAdapter 189
