/*
 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/conn/tsccm/BasicPoolEntry.java $
 * $Revision: 652721 $
 * $Date: 2008-05-01 17:32:20 -0700 (Thu, 01 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.tsccm;


import java.lang.ref.ReferenceQueue;

import org.apache.http.conn.OperatedClientConnection;
import org.apache.http.conn.ClientConnectionOperator;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.impl.conn.AbstractPoolEntry;


/**
 * Basic implementation of a connection pool entry.
 */
public class BasicPoolEntry extends AbstractPoolEntry {

    /**
     * A weak reference to <code>this</code> used to detect GC of entries.
     * Pool entries can only be GCed when they are allocated by an application
     * and therefore not referenced with a hard link in the manager.
     */
    private final BasicPoolEntryRef reference;

    /**
     * Creates a new pool entry.
     *
     * @param op      the connection operator
     * @param route   the planned route for the connection
     * @param queue   the reference queue for tracking GC of this entry,
     *                or <code>null</code>
     */
    public BasicPoolEntry(ClientConnectionOperator op,
                          HttpRoute route,
                          ReferenceQueue<Object> queue) {
        super(op, route);
        if (route == null) {
            throw new IllegalArgumentException("HTTP route may not be null");
        }
        this.reference = new BasicPoolEntryRef(this, queue);
    }

    protected final OperatedClientConnection getConnection() {
        return super.connection;
    }

    protected final HttpRoute getPlannedRoute() {
        return super.route;
    }

    protected final BasicPoolEntryRef getWeakRef() {
        return this.reference;
    }


} // class BasicPoolEntry