SimpleClientConnManager, good enough to run the client examples
git-svn-id: https://svn.apache.org/repos/asf/jakarta/httpcomponents/httpclient/trunk@509667 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Roland Weber
parent
0d09aafa2e
commit
924f8ddf3a
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@ -55,6 +55,7 @@ import org.apache.http.conn.SchemeRegistry;
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import org.apache.http.conn.SocketFactory;
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import org.apache.http.conn.PlainSocketFactory;
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import org.apache.http.conn.ClientConnectionManager;
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//import org.apache.http.impl.conn.SimpleClientConnManager;
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import org.apache.http.impl.conn.ThreadSafeClientConnManager;
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import org.apache.http.client.HttpClient;
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import org.apache.http.impl.client.DefaultHttpClient;
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@ -137,6 +138,7 @@ public class ClientExecuteDirect {
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ClientConnectionManager ccm =
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new ThreadSafeClientConnManager(getParams(), supportedSchemes);
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// new SimpleClientConnManager(getParams(), supportedSchemes);
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DefaultHttpClient dhc =
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new DefaultHttpClient(getParams(), ccm, supportedSchemes);
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@ -57,6 +57,7 @@ import org.apache.http.conn.PlainSocketFactory;
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import org.apache.http.conn.ssl.SSLSocketFactory;
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import org.apache.http.conn.ClientConnectionManager;
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import org.apache.http.conn.HttpRoute;
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//import org.apache.http.impl.conn.SimpleClientConnManager;
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import org.apache.http.impl.conn.ThreadSafeClientConnManager;
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import org.apache.http.client.HttpClient;
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import org.apache.http.client.RoutedRequest;
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@ -149,6 +150,7 @@ public class ClientExecuteProxy {
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ClientConnectionManager ccm =
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new ThreadSafeClientConnManager(getParams(), supportedSchemes);
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// new SimpleClientConnManager(getParams(), supportedSchemes);
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DefaultHttpClient dhc =
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new DefaultHttpClient(getParams(), ccm, supportedSchemes);
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@ -0,0 +1,573 @@
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/*
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* $HeadURL$
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* $Revision$
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* $Date$
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*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*
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*/
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package org.apache.http.impl.conn;
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import java.io.IOException;
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import java.lang.ref.Reference;
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import java.lang.ref.ReferenceQueue;
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import java.lang.ref.WeakReference;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.Map;
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import java.util.WeakHashMap;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.http.HttpHost;
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import org.apache.http.conn.ClientConnectionManager;
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import org.apache.http.conn.ClientConnectionOperator;
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import org.apache.http.conn.ConnectionPoolTimeoutException;
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import org.apache.http.conn.SchemeRegistry;
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import org.apache.http.conn.HttpRoute;
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import org.apache.http.conn.RouteTracker;
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import org.apache.http.conn.ManagedClientConnection;
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import org.apache.http.conn.OperatedClientConnection;
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import org.apache.http.conn.params.HttpConnectionManagerParams;
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import org.apache.http.params.BasicHttpParams;
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import org.apache.http.params.HttpParams;
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import org.apache.http.protocol.HttpContext;
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/**
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* A connection "manager" for a single connection.
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* This manager is good only for single-threaded use.
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* Allocation <i>always</i> returns the connection immediately,
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* even if it has not been released after the previous allocation.
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* In that case, a {@link #MISUSE_MESSAGE warning} is logged
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* and the previously issued connection is revoked.
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* <p>
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* This class is derived from <code>SimpleHttpConnectionManager</code>
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* in HttpClient 3. See there for original authors.
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* </p>
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*
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* @author <a href="mailto:rolandw at apache.org">Roland Weber</a>
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* @author <a href="mailto:becke@u.washington.edu">Michael Becke</a>
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*
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*
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* <!-- empty lines to avoid svn diff problems -->
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* @version $Revision$
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*
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* @since 4.0
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*/
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public class SimpleClientConnManager implements ClientConnectionManager {
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private static final Log LOG =
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LogFactory.getLog(SimpleClientConnManager.class);
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/** The message to be logged on multiple allocation. */
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public final static String MISUSE_MESSAGE =
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"Invalid use of SimpleClientConnManager: connection still allocated.\n" +
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"Make sure to release the connection before allocating another one.";
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/** The parameters of this connection manager. */
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protected HttpParams params = new BasicHttpParams();
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/** The operator for opening and updating connections. */
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protected ClientConnectionOperator connOperator;
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/** The one and only connection being managed here. */
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protected OperatedClientConnection operatedConn;
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/** The tracked route, or <code>null</code> while not connected. */
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protected RouteTracker trackedRoute;
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/** The currently issued managed connection, if any. */
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protected SimpleConnAdapter managedConn;
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/** The time of the last connection release, or -1. */
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protected long lastReleaseTime;
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/** Whether the connection should be shut down on release. */
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protected boolean alwaysShutDown;
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/** Indicates whether this connection manager is shut down. */
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protected volatile boolean isShutDown;
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/**
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* Creates a new simple connection manager.
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*
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* @param params the parameters for this manager
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* @param schreg the scheme registry, or
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* <code>null</code> for the default registry
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*/
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public SimpleClientConnManager(HttpParams params,
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SchemeRegistry schreg) {
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if (params == null) {
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throw new IllegalArgumentException("Parameters must not be null.");
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}
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this.params = params;
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this.connOperator = createConnectionOperator(schreg);
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this.operatedConn = this.connOperator.createConnection();
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this.trackedRoute = null;
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this.managedConn = null;
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this.lastReleaseTime = -1L;
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this.alwaysShutDown = false; //@@@ from params? as argument?
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this.isShutDown = false;
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} // <constructor>
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/**
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* Hook for creating the connection operator.
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* It is called by the constructor.
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* Derived classes can override this method to change the
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* instantiation of the operator.
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* The default implementation here instantiates
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* {@link DefaultClientConnectionOperator DefaultClientConnectionOperator}.
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*
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* @param schreg the scheme registry to use, or <code>null</code>
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*
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* @return the connection operator to use
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*/
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protected ClientConnectionOperator
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createConnectionOperator(SchemeRegistry schreg) {
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return new DefaultClientConnectionOperator(schreg);
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}
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/**
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* Asserts that this manager is not shut down.
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*
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* @throws IllegalStateException if this manager is shut down
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*/
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protected final void assertStillUp()
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throws IllegalStateException {
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if (this.isShutDown)
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throw new IllegalStateException("Manager is shut down.");
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}
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/**
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* Obtains a connection.
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* Maps to {@link #getConnection(HttpRoute) getConnection(HttpRoute)}
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* since this manager never blocks the caller.
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*
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* @param route where the connection should point to
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* @param timeout ignored
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*
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* @return a connection that can be used to communicate
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* along the given route
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*/
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public final ManagedClientConnection getConnection(HttpRoute route,
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long timeout) {
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return getConnection(route);
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}
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/**
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* Obtains a connection.
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* This method does not block.
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*
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* @param route where the connection should point to
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*
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* @return a connection that can be used to communicate
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* along the given route
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*/
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public ManagedClientConnection getConnection(HttpRoute route) {
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if (route == null) {
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throw new IllegalArgumentException("Route may not be null.");
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}
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assertStillUp();
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if (LOG.isDebugEnabled()) {
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LOG.debug("SimpleClientConnManager.getConnection: " + route);
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}
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if (managedConn != null)
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revokeConnection();
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// check re-usability of the connection
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if (operatedConn.isOpen()) {
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final boolean shutdown =
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(trackedRoute == null) || // how could that happen?
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!trackedRoute.toRoute().equals(route);
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if (shutdown) {
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try {
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operatedConn.shutdown();
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} catch (IOException iox) {
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LOG.debug("Problem shutting down connection.", iox);
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// create a new connection, just to be sure
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operatedConn = connOperator.createConnection();
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} finally {
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trackedRoute = null;
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}
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}
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}
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managedConn = new SimpleConnAdapter(operatedConn, route);
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return managedConn;
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}
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// non-javadoc, see interface ClientConnectionManager
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public void releaseConnection(ManagedClientConnection conn) {
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assertStillUp();
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if (!(conn instanceof SimpleConnAdapter)) {
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throw new IllegalArgumentException
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("Connection class mismatch, " +
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"connection not obtained from this manager.");
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}
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SimpleConnAdapter sca = (SimpleConnAdapter) conn;
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if (sca.connManager != this) {
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throw new IllegalArgumentException
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("Connection not obtained from this manager.");
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}
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if (sca.wrappedConnection == null)
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return; // already released
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try {
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// make sure that the response has been read completely
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if (sca.isOpen() && (this.alwaysShutDown ||
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!sca.isMarkedReusable())
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) {
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if (LOG.isDebugEnabled()) {
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LOG.debug
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("Released connection open but not reusable.");
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}
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// make sure this connection will not be re-used
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//@@@ Can we set some kind of flag before shutting down?
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//@@@ If shutdown throws an exception, we can't be sure
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//@@@ that the connection will consider itself closed.
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// we might have gotten here because of a shutdown trigger
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// shutdown of the adapter also clears the tracked route
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sca.shutdown();
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}
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} catch (IOException iox) {
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//@@@ log as warning? let pass?
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if (LOG.isDebugEnabled())
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LOG.debug("Exception shutting down released connection.",
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iox);
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} finally {
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sca.detach();
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managedConn = null;
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lastReleaseTime = System.currentTimeMillis();
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}
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} // releaseConnection
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// non-javadoc, see interface ClientConnectionManager
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public void closeIdleConnections(long idletime) {
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assertStillUp();
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if ((managedConn == null) && operatedConn.isOpen()) {
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final long cutoff = System.currentTimeMillis() - idletime;
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if (lastReleaseTime <= cutoff) {
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try {
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operatedConn.close();
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} catch (IOException iox) {
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// ignore
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LOG.debug("Problem closing idle connection.", iox);
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} finally {
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trackedRoute = null;
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}
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}
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}
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}
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// non-javadoc, see interface ClientConnectionManager
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public void shutdown() {
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this.isShutDown = true;
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if (managedConn != null)
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managedConn.detach();
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try {
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if (operatedConn != null)
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operatedConn.shutdown();
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} catch (IOException iox) {
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// ignore
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LOG.debug("Problem while shutting down manager.", iox);
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} finally {
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trackedRoute = null;
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operatedConn = null;
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}
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}
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/**
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* Revokes the currently issued connection.
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* The adapter gets disconnected, the connection will be shut down.
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*/
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protected void revokeConnection() {
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if (managedConn == null)
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return;
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// Generate a stack trace, it might help debugging.
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// Do NOT throw the exception, just log it!
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IllegalStateException isx = new IllegalStateException
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("Revoking connection to " + managedConn.getRoute());
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LOG.warn(MISUSE_MESSAGE, isx);
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if (managedConn != null)
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managedConn.detach();
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try {
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if (operatedConn.isOpen())
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operatedConn.shutdown();
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} catch (IOException iox) {
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// ignore
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LOG.debug("Problem while shutting down connection.", iox);
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} finally {
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trackedRoute = null;
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}
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}
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/**
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* The connection adapter used by this manager.
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* <p><i>Refactoring pending!</i>
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* This has a lot of common code with private classes
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* <code>TrackingPoolEntry</code> and <code>HttpConnectionAdapter</code>
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* in {@link ThreadSafeClientConnManager ThreadSafeClientConnManager}.
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*/
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protected class SimpleConnAdapter
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extends AbstractClientConnectionAdapter {
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/** The route for which the connection got allocated. */
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private HttpRoute plannedRoute;
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// the tracked route is kept in the enclosing manager
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//@@@ switch to an adapter+poolentry style, as in TSCCM
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/**
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* Creates a new connection adapter.
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*
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* @param occ the underlying connection for this adapter
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* @param plan the planned route for the connection
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*/
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protected SimpleConnAdapter(OperatedClientConnection occ,
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HttpRoute plan) {
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super(SimpleClientConnManager.this, occ);
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super.markedReusable = true;
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this.plannedRoute = plan;
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}
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/**
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* Asserts that this adapter is still attached.
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*
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* @throws IllegalStateException
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* if it is {@link #detach detach}ed
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*/
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protected final void assertAttached() {
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if (wrappedConnection == null) {
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throw new IllegalStateException("Adapter is detached.");
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}
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}
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/**
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* Detaches this adapter from the wrapped connection.
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* This adapter becomes useless.
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*/
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protected void detach() {
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this.wrappedConnection = null;
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}
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// non-javadoc, see interface ManagedHttpConnection
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public HttpRoute getRoute() {
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assertAttached();
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return (trackedRoute == null) ?
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null : trackedRoute.toRoute();
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}
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// non-javadoc, see interface ManagedHttpConnection
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public void open(HttpRoute route,
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HttpContext context, HttpParams params)
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throws IOException {
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if (route == null) {
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throw new IllegalArgumentException
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("Route must not be null.");
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}
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//@@@ is context allowed to be null? depends on operator?
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if (params == null) {
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throw new IllegalArgumentException
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("Parameters must not be null.");
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}
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assertAttached();
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if ((trackedRoute != null) &&
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trackedRoute.isConnected()) {
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throw new IllegalStateException("Connection already open.");
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}
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// - collect the arguments
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// - call the operator
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// - update the tracking data
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// In this order, we can be sure that only a successful
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// opening of the connection will be tracked.
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//@@@ verify route against planned route?
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if (LOG.isDebugEnabled()) {
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LOG.debug("Open connection for " + route);
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}
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trackedRoute = new RouteTracker(route);
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final HttpHost proxy = route.getProxyHost();
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SimpleClientConnManager.this.connOperator.openConnection
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(wrappedConnection,
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(proxy != null) ? proxy : route.getTargetHost(),
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route.getLocalAddress(),
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context, params);
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if (proxy == null)
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trackedRoute.connectTarget(wrappedConnection.isSecure());
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else
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trackedRoute.connectProxy(proxy, wrappedConnection.isSecure());
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} // open
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// non-javadoc, see interface ManagedHttpConnection
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public void tunnelCreated(boolean secure, HttpParams params)
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throws IOException {
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if (params == null) {
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throw new IllegalArgumentException
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("Parameters must not be null.");
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}
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assertAttached();
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//@@@ check for proxy in planned route?
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if ((trackedRoute == null) ||
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!trackedRoute.isConnected()) {
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throw new IllegalStateException("Connection not open.");
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}
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if (trackedRoute.isTunnelled()) {
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throw new IllegalStateException
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("Connection is already tunnelled.");
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}
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wrappedConnection.update(null, trackedRoute.getTargetHost(),
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secure, params);
|
||||
trackedRoute.createTunnel(secure);
|
||||
|
||||
} // tunnelCreated
|
||||
|
||||
|
||||
// non-javadoc, see interface ManagedHttpConnection
|
||||
public void layerProtocol(HttpContext context, HttpParams params)
|
||||
throws IOException {
|
||||
|
||||
//@@@ is context allowed to be null? depends on operator?
|
||||
if (params == null) {
|
||||
throw new IllegalArgumentException
|
||||
("Parameters must not be null.");
|
||||
}
|
||||
assertAttached();
|
||||
|
||||
if ((trackedRoute == null) ||
|
||||
!trackedRoute.isConnected()) {
|
||||
throw new IllegalStateException("Connection not open.");
|
||||
}
|
||||
if (!trackedRoute.isTunnelled()) {
|
||||
//@@@ allow this?
|
||||
throw new IllegalStateException
|
||||
("Protocol layering without a tunnel not supported.");
|
||||
}
|
||||
if (trackedRoute.isLayered()) {
|
||||
throw new IllegalStateException
|
||||
("Multiple protocol layering not supported.");
|
||||
}
|
||||
|
||||
// - collect the arguments
|
||||
// - call the operator
|
||||
// - update the tracking data
|
||||
// In this order, we can be sure that only a successful
|
||||
// layering on top of the connection will be tracked.
|
||||
|
||||
final HttpHost target = trackedRoute.getTargetHost();
|
||||
|
||||
if (LOG.isDebugEnabled()) {
|
||||
LOG.debug("Layer protocol on connection to " + target);
|
||||
}
|
||||
|
||||
SimpleClientConnManager.this.connOperator
|
||||
.updateSecureConnection(wrappedConnection, target,
|
||||
context, params);
|
||||
|
||||
trackedRoute.layerProtocol(wrappedConnection.isSecure());
|
||||
|
||||
} // layerProtocol
|
||||
|
||||
|
||||
// non-javadoc, see interface HttpConnection
|
||||
public void close() throws IOException {
|
||||
trackedRoute = null;
|
||||
|
||||
if (wrappedConnection != null) {
|
||||
wrappedConnection.close();
|
||||
} else {
|
||||
// do nothing
|
||||
}
|
||||
}
|
||||
|
||||
// non-javadoc, see interface HttpConnection
|
||||
public void shutdown() throws IOException {
|
||||
trackedRoute = null;
|
||||
|
||||
if (wrappedConnection != null) {
|
||||
wrappedConnection.shutdown();
|
||||
} else {
|
||||
// do nothing
|
||||
}
|
||||
}
|
||||
|
||||
} // class SimpleConnAdapter
|
||||
|
||||
|
||||
} // class SimpleClientConnManager
|
||||
|
|
@ -376,7 +376,7 @@ public class ThreadSafeClientConnManager
|
|||
} catch (IOException iox) {
|
||||
//@@@ log as warning? let pass?
|
||||
if (LOG.isDebugEnabled())
|
||||
LOG.debug("Exception shutting down released connection",
|
||||
LOG.debug("Exception shutting down released connection.",
|
||||
iox);
|
||||
} finally {
|
||||
TrackingPoolEntry entry = hca.poolEntry;
|
||||
|
|
@ -1409,70 +1409,10 @@ public class ThreadSafeClientConnManager
|
|||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
//===========================
|
||||
// HttpHostConnection methods
|
||||
//===========================
|
||||
public void setHttpConnectionManager(final HttpConnectionManager httpConnectionManager) {
|
||||
if (hasConnection()) {
|
||||
wrappedConnection.setHttpConnectionManager(httpConnectionManager);
|
||||
} else {
|
||||
// do nothing
|
||||
}
|
||||
}
|
||||
|
||||
public boolean isLocked() {
|
||||
if (hasConnection()) {
|
||||
return wrappedConnection.isLocked();
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
public void setLocked(boolean locked) {
|
||||
if (hasConnection()) {
|
||||
wrappedConnection.setLocked(locked);
|
||||
} else {
|
||||
// do nothing
|
||||
}
|
||||
}
|
||||
|
||||
public void releaseConnection() {
|
||||
HttpHostConnection conn = this.wrappedConnection;
|
||||
if (conn != null && !conn.isLocked()) {
|
||||
this.wrappedConnection = null;
|
||||
conn.releaseConnection();
|
||||
} else {
|
||||
// do nothing
|
||||
}
|
||||
}
|
||||
|
||||
public HostConfiguration getHostConfiguration() {
|
||||
if (hasConnection()) {
|
||||
return wrappedConnection.getHostConfiguration();
|
||||
} else {
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
public void open(final HttpParams params) throws IOException {
|
||||
if (hasConnection()) {
|
||||
wrappedConnection.open(params);
|
||||
} else {
|
||||
// do nothing
|
||||
}
|
||||
}
|
||||
|
||||
public void tunnelCreated(final HttpParams params) throws IOException {
|
||||
if (hasConnection()) {
|
||||
wrappedConnection.tunnelCreated(params);
|
||||
} else {
|
||||
// do nothing
|
||||
}
|
||||
}
|
||||
|
||||
public void setSocketTimeout(int timeout) throws SocketException {
|
||||
if (hasConnection()) {
|
||||
|
|
@ -1481,24 +1421,8 @@ public class ThreadSafeClientConnManager
|
|||
// do nothing
|
||||
}
|
||||
}
|
||||
|
||||
public HttpResponse getLastResponse() {
|
||||
if (hasConnection()) {
|
||||
return wrappedConnection.getLastResponse();
|
||||
} else {
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
public void setLastResponse(final HttpResponse response) {
|
||||
if (hasConnection()) {
|
||||
wrappedConnection.setLastResponse(response);
|
||||
} else {
|
||||
// do nothing
|
||||
}
|
||||
}
|
||||
*/
|
||||
} // class HttpConnectionAdapter
|
||||
|
||||
}
|
||||
} // class ThreadSafeClientConnManager
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue