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/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/conn/AbstractPooledConnAdapter.java $
* $Revision: 658775 $
* $Date: 2008-05-21 10:30:45 -0700 (Wed, 21 May 2008) $
*
* ====================================================================
*
* 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.impl.conn;
import java.io.IOException;
import org.apache.http.HttpHost;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HttpContext;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.OperatedClientConnection;
/**
* Abstract adapter from pool {@link AbstractPoolEntry entries} to
* {@link org.apache.http.conn.ManagedClientConnection managed}
* client connections.
* The connection in the pool entry is used to initialize the base class.
* In addition, methods to establish a route are delegated to the
* pool entry. {@link #shutdown shutdown} and {@link #close close}
* will clear the tracked route in the pool entry and call the
* respective method of the wrapped connection.
*
* @author <a href="mailto:rolandw at apache.org">Roland Weber</a>
*
*
* <!-- empty lines to avoid svn diff problems -->
* @version $Revision: 658775 $ $Date: 2008-05-21 10:30:45 -0700 (Wed, 21 May 2008) $
*
* @since 4.0
*/
public abstract class AbstractPooledConnAdapter extends AbstractClientConnAdapter {
/** The wrapped pool entry. */
protected volatile AbstractPoolEntry poolEntry;
/**
* Creates a new connection adapter.
*
* @param manager the connection manager
* @param entry the pool entry for the connection being wrapped
*/
protected AbstractPooledConnAdapter(ClientConnectionManager manager,
AbstractPoolEntry entry) {
super(manager, entry.connection);
this.poolEntry = entry;
}
/**
* Asserts that this adapter is still attached.
*
* @throws IllegalStateException
* if it is {@link #detach detach}ed
*/
protected final void assertAttached() {
if (poolEntry == null) {
throw new IllegalStateException("Adapter is detached.");
}
}
/**
* Detaches this adapter from the wrapped connection.
* This adapter becomes useless.
*/
@Override
protected void detach() {
super.detach();
poolEntry = null;
}
// non-javadoc, see interface ManagedHttpConnection
public HttpRoute getRoute() {
assertAttached();
return (poolEntry.tracker == null) ?
null : poolEntry.tracker.toRoute();
}
// non-javadoc, see interface ManagedHttpConnection
public void open(HttpRoute route,
HttpContext context, HttpParams params)
throws IOException {
assertAttached();
poolEntry.open(route, context, params);
}
// non-javadoc, see interface ManagedHttpConnection
public void tunnelTarget(boolean secure, HttpParams params)
throws IOException {
assertAttached();
poolEntry.tunnelTarget(secure, params);
}
// non-javadoc, see interface ManagedHttpConnection
public void tunnelProxy(HttpHost next, boolean secure, HttpParams params)
throws IOException {
assertAttached();
poolEntry.tunnelProxy(next, secure, params);
}
// non-javadoc, see interface ManagedHttpConnection
public void layerProtocol(HttpContext context, HttpParams params)
throws IOException {
assertAttached();
poolEntry.layerProtocol(context, params);
}
// non-javadoc, see interface HttpConnection
public void close() throws IOException {
if (poolEntry != null)
poolEntry.shutdownEntry();
OperatedClientConnection conn = getWrappedConnection();
if (conn != null) {
conn.close();
}
}
// non-javadoc, see interface HttpConnection
public void shutdown() throws IOException {
if (poolEntry != null)
poolEntry.shutdownEntry();
OperatedClientConnection conn = getWrappedConnection();
if (conn != null) {
conn.shutdown();
}
}
// non-javadoc, see interface ManagedClientConnection
public Object getState() {
assertAttached();
return poolEntry.getState();
}
// non-javadoc, see interface ManagedClientConnection
public void setState(final Object state) {
assertAttached();
poolEntry.setState(state);
}
} // class AbstractPooledConnAdapter
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