1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/conn/ManagedClientConnection.java $ 3 * $Revision: 672969 $ 4 * $Date: 2008-06-30 18:09:50 -0700 (Mon, 30 Jun 2008) $ 5 * 6 * ==================================================================== 7 * Licensed to the Apache Software Foundation (ASF) under one 8 * or more contributor license agreements. See the NOTICE file 9 * distributed with this work for additional information 10 * regarding copyright ownership. The ASF licenses this file 11 * to you under the Apache License, Version 2.0 (the 12 * "License"); you may not use this file except in compliance 13 * with 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, 18 * software distributed under the License is distributed on an 19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20 * KIND, either express or implied. See the License for the 21 * specific language governing permissions and limitations 22 * under the License. 23 * ==================================================================== 24 * 25 * This software consists of voluntary contributions made by many 26 * individuals on behalf of the Apache Software Foundation. For more 27 * information on the Apache Software Foundation, please see 28 * <http://www.apache.org/>. 29 * 30 */ 31 32 package org.apache.http.conn; 33 34 import java.io.IOException; 35 import java.util.concurrent.TimeUnit; 36 37 import javax.net.ssl.SSLSession; 38 39 import org.apache.http.HttpClientConnection; 40 import org.apache.http.HttpInetConnection; 41 import org.apache.http.HttpHost; 42 import org.apache.http.params.HttpParams; 43 import org.apache.http.protocol.HttpContext; 44 45 import org.apache.http.conn.routing.HttpRoute; 46 47 48 49 /** 50 * A client-side connection with advanced connection logic. 51 * Instances are typically obtained from a connection manager. 52 * 53 * @author <a href="mailto:rolandw at apache.org">Roland Weber</a> 54 * 55 * 56 * <!-- empty lines to avoid svn diff problems --> 57 * @version $Revision: 672969 $ 58 * 59 * @since 4.0 60 * 61 * @deprecated Please use {@link java.net.URL#openConnection} instead. 62 * Please visit <a href="http://android-developers.blogspot.com/2011/09/androids-http-clients.html">this webpage</a> 63 * for further details. 64 */ 65 @Deprecated 66 public interface ManagedClientConnection extends 67 HttpClientConnection, HttpInetConnection, ConnectionReleaseTrigger { 68 69 70 /** 71 * Indicates whether this connection is secure. 72 * The return value is well-defined only while the connection is open. 73 * It may change even while the connection is open. 74 * 75 * @return <code>true</code> if this connection is secure, 76 * <code>false</code> otherwise 77 */ 78 boolean isSecure() 79 ; 80 81 82 /** 83 * Obtains the current route of this connection. 84 * 85 * @return the route established so far, or 86 * <code>null</code> if not connected 87 */ 88 HttpRoute getRoute() 89 ; 90 91 92 /** 93 * Obtains the SSL session of the underlying connection, if any. 94 * If this connection is open, and the underlying socket is an 95 * {@link javax.net.ssl.SSLSocket SSLSocket}, the SSL session of 96 * that socket is obtained. This is a potentially blocking operation. 97 * <br/> 98 * <b>Note:</b> Whether the underlying socket is an SSL socket 99 * can not necessarily be determined via {@link #isSecure}. 100 * Plain sockets may be considered secure, for example if they are 101 * connected to a known host in the same network segment. 102 * On the other hand, SSL sockets may be considered insecure, 103 * for example depending on the chosen cipher suite. 104 * 105 * @return the underlying SSL session if available, 106 * <code>null</code> otherwise 107 */ 108 SSLSession getSSLSession() 109 ; 110 111 112 /** 113 * Opens this connection according to the given route. 114 * 115 * @param route the route along which to open. It will be opened to 116 * the first proxy if present, or directly to the target. 117 * @param context the context for opening this connection 118 * @param params the parameters for opening this connection 119 * 120 * @throws IOException in case of a problem 121 */ 122 void open(HttpRoute route, HttpContext context, HttpParams params) 123 throws IOException 124 ; 125 126 127 /** 128 * Indicates that a tunnel to the target has been established. 129 * The route is the one previously passed to {@link #open open}. 130 * Subsequently, {@link #layerProtocol layerProtocol} can be called 131 * to layer the TLS/SSL protocol on top of the tunnelled connection. 132 * <br/> 133 * <b>Note:</b> In HttpClient 3, a call to the corresponding method 134 * would automatically trigger the layering of the TLS/SSL protocol. 135 * This is not the case anymore, you can establish a tunnel without 136 * layering a new protocol over the connection. 137 * 138 * @param secure <code>true</code> if the tunnel should be considered 139 * secure, <code>false</code> otherwise 140 * @param params the parameters for tunnelling this connection 141 * 142 * @throws IOException in case of a problem 143 */ 144 void tunnelTarget(boolean secure, HttpParams params) 145 throws IOException 146 ; 147 148 149 /** 150 * Indicates that a tunnel to an intermediate proxy has been established. 151 * This is used exclusively for so-called <i>proxy chains</i>, where 152 * a request has to pass through multiple proxies before reaching the 153 * target. In that case, all proxies but the last need to be tunnelled 154 * when establishing the connection. Tunnelling of the last proxy to the 155 * target is optional and would be indicated via {@link #tunnelTarget}. 156 * 157 * @param next the proxy to which the tunnel was established. 158 * This is <i>not</i> the proxy <i>through</i> which 159 * the tunnel was established, but the new end point 160 * of the tunnel. The tunnel does <i>not</i> yet 161 * reach to the target, use {@link #tunnelTarget} 162 * to indicate an end-to-end tunnel. 163 * @param secure <code>true</code> if the connection should be 164 * considered secure, <code>false</code> otherwise 165 * @param params the parameters for tunnelling this connection 166 * 167 * @throws IOException in case of a problem 168 */ 169 void tunnelProxy(HttpHost next, boolean secure, HttpParams params) 170 throws IOException 171 ; 172 173 174 /** 175 * Layers a new protocol on top of a {@link #tunnelTarget tunnelled} 176 * connection. This is typically used to create a TLS/SSL connection 177 * through a proxy. 178 * The route is the one previously passed to {@link #open open}. 179 * It is not guaranteed that the layered connection is 180 * {@link #isSecure secure}. 181 * 182 * @param context the context for layering on top of this connection 183 * @param params the parameters for layering on top of this connection 184 * 185 * @throws IOException in case of a problem 186 */ 187 void layerProtocol(HttpContext context, HttpParams params) 188 throws IOException 189 ; 190 191 192 /** 193 * Marks this connection as being in a reusable communication state. 194 * The checkpoints for reuseable communication states (in the absence 195 * of pipelining) are before sending a request and after receiving 196 * the response in it's entirety. 197 * The connection will automatically clear the checkpoint when 198 * used for communication. A call to this method indicates that 199 * the next checkpoint has been reached. 200 * <br/> 201 * A reusable communication state is necessary but not sufficient 202 * for the connection to be reused. 203 * A {@link #getRoute route} mismatch, the connection being closed, 204 * or other circumstances might prevent reuse. 205 */ 206 void markReusable() 207 ; 208 209 210 /** 211 * Marks this connection as not being in a reusable state. 212 * This can be used immediately before releasing this connection 213 * to prevent it's reuse. Reasons for preventing reuse include 214 * error conditions and the evaluation of a 215 * {@link org.apache.http.ConnectionReuseStrategy reuse strategy}. 216 * <br/> 217 * <b>Note:</b> 218 * It is <i>not</i> necessary to call here before writing to 219 * or reading from this connection. Communication attempts will 220 * automatically unmark the state as non-reusable. It can then 221 * be switched back using {@link #markReusable markReusable}. 222 */ 223 void unmarkReusable() 224 ; 225 226 227 /** 228 * Indicates whether this connection is in a reusable communication state. 229 * See {@link #markReusable markReusable} and 230 * {@link #unmarkReusable unmarkReusable} for details. 231 * 232 * @return <code>true</code> if this connection is marked as being in 233 * a reusable communication state, 234 * <code>false</code> otherwise 235 */ 236 boolean isMarkedReusable() 237 ; 238 239 /** 240 * Assigns a state object to this connection. Connection managers may make 241 * use of the connection state when allocating persistent connections. 242 * 243 * @param state The state object 244 */ 245 void setState(Object state) 246 ; 247 248 /** 249 * Returns the state object associated with this connection. 250 * 251 * @return The state object 252 */ 253 Object getState() 254 ; 255 256 /** 257 * Sets the duration that this connection can remain idle before it is 258 * reused. The connection should not be used again if this time elapses. The 259 * idle duration must be reset after each request sent over this connection. 260 * The elapsed time starts counting when the connection is released, which 261 * is typically after the headers (and any response body, if present) is 262 * fully consumed. 263 */ 264 void setIdleDuration(long duration, TimeUnit unit); 265 266 } // interface ManagedClientConnection 267
