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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing,
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 * KIND, either express or implied.  See the License for the
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package org.apache.http.impl.pool;

import java.util.concurrent.atomic.AtomicLong;

import org.apache.http.HttpClientConnection;
import org.apache.http.HttpHost;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.annotation.Contract;
import org.apache.http.config.ConnectionConfig;
import org.apache.http.config.SocketConfig;
import org.apache.http.params.HttpParams;
import org.apache.http.pool.AbstractConnPool;
import org.apache.http.pool.ConnFactory;

A very basic ConnPool implementation that represents a pool of blocking HttpClientConnection connections identified by an HttpHost instance. Please note this pool implementation does not support complex routes via a proxy cannot differentiate between direct and proxied connections. 
See Also:
HttpHost
Since:
4.2/**
 * A very basic {@link org.apache.http.pool.ConnPool} implementation that
 * represents a pool of blocking {@link HttpClientConnection} connections
 * identified by an {@link HttpHost} instance. Please note this pool
 * implementation does not support complex routes via a proxy cannot
 * differentiate between direct and proxied connections.
 *
 * @see HttpHost
 * @since 4.2
 */
@SuppressWarnings("deprecation")
@Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL)
public class BasicConnPool extends AbstractConnPool<HttpHost, HttpClientConnection, BasicPoolEntry> {

    private static final AtomicLong COUNTER = new AtomicLong();

    public BasicConnPool(final ConnFactory<HttpHost, HttpClientConnection> connFactory) {
        super(connFactory, 2, 20);
    }

    
Deprecated:
(4.3) use BasicConnPool(SocketConfig, ConnectionConfig)/**
     * @deprecated (4.3) use {@link BasicConnPool#BasicConnPool(SocketConfig, ConnectionConfig)}
     */
    @Deprecated
    public BasicConnPool(final HttpParams params) {
        super(new BasicConnFactory(params), 2, 20);
    }

    
Since:
4.3/**
     * @since 4.3
     */
    public BasicConnPool(final SocketConfig sconfig, final ConnectionConfig cconfig) {
        super(new BasicConnFactory(sconfig, cconfig), 2, 20);
    }

    
Since:
4.3/**
     * @since 4.3
     */
    public BasicConnPool() {
        super(new BasicConnFactory(SocketConfig.DEFAULT, ConnectionConfig.DEFAULT), 2, 20);
    }

    @Override
    protected BasicPoolEntry createEntry(
            final HttpHost host,
            final HttpClientConnection conn) {
        return new BasicPoolEntry(Long.toString(COUNTER.getAndIncrement()), host, conn);
    }

    @Override
    protected boolean validate(final BasicPoolEntry entry) {
        return !entry.getConnection().isStale();
    }

}