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/*
* ====================================================================
*
* 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
* .
*
*/
package nl.topicus.jdbc.shaded.org.apache.http.impl.conn.tsccm;
import java.io.IOException;
import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
import java.util.Set;
import java.util.HashSet;
import java.util.Iterator;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import nl.topicus.jdbc.shaded.org.apache.http.annotation.GuardedBy;
import nl.topicus.jdbc.shaded.org.apache.http.annotation.ThreadSafe;
import nl.topicus.jdbc.shaded.org.apache.commons.logging.Log;
import nl.topicus.jdbc.shaded.org.apache.commons.logging.LogFactory;
import nl.topicus.jdbc.shaded.org.apache.http.conn.ConnectionPoolTimeoutException;
import nl.topicus.jdbc.shaded.org.apache.http.conn.OperatedClientConnection;
import nl.topicus.jdbc.shaded.org.apache.http.conn.routing.HttpRoute;
import nl.topicus.jdbc.shaded.org.apache.http.impl.conn.IdleConnectionHandler;
/**
* An abstract connection pool.
* It is used by the {@link ThreadSafeClientConnManager}.
* The abstract pool includes a {@link #poolLock}, which is used to
* synchronize access to the internal pool datastructures.
* Don't use synchronized for that purpose!
*
* @since 4.0
*/
@ThreadSafe
@SuppressWarnings("deprecation")
public abstract class AbstractConnPool implements RefQueueHandler {
private final Log log = LogFactory.getLog(getClass());
/**
* The global lock for this pool.
*/
protected final Lock poolLock;
/**
* References to issued connections.
* Must hold poolLock when accessing.
*/
@GuardedBy("poolLock")
protected Set leasedConnections;
/** The handler for idle connections. Must hold poolLock when accessing. */
@GuardedBy("poolLock")
protected IdleConnectionHandler idleConnHandler;
/** The current total number of connections. */
@GuardedBy("poolLock")
protected int numConnections;
/** Indicates whether this pool is shut down. */
protected volatile boolean isShutDown;
@Deprecated
protected Set issuedConnections;
@Deprecated
protected ReferenceQueue