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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  package org.apache.http.impl.pool;
28  
29  import java.util.concurrent.atomic.AtomicLong;
30  
31  import org.apache.http.HttpClientConnection;
32  import org.apache.http.HttpHost;
33  import org.apache.http.annotation.ThreadSafe;
34  import org.apache.http.params.HttpParams;
35  import org.apache.http.pool.AbstractConnPool;
36  import org.apache.http.pool.ConnFactory;
37  import org.apache.http.pool.ConnPool;
38  
39  /**
40   * A very basic {@link ConnPool} implementation that represents a pool
41   * of blocking {@link HttpClientConnection} connections identified by
42   * an {@link HttpHost} instance. Please note this pool implementation
43   * does not support complex routes via a proxy cannot differentiate between
44   * direct and proxied connections.
45   * <p/>
46   * The following parameters can be used to customize the behavior of this
47   * class:
48   * <ul>
49   *  <li>{@link org.apache.http.params.CoreProtocolPNames#HTTP_ELEMENT_CHARSET}</li>
50   *  <li>{@link org.apache.http.params.CoreConnectionPNames#TCP_NODELAY}</li>
51   *  <li>{@link org.apache.http.params.CoreConnectionPNames#SO_TIMEOUT}</li>
52   *  <li>{@link org.apache.http.params.CoreConnectionPNames#SO_LINGER}</li>
53   *  <li>{@link org.apache.http.params.CoreConnectionPNames#SOCKET_BUFFER_SIZE}</li>
54   *  <li>{@link org.apache.http.params.CoreConnectionPNames#MAX_LINE_LENGTH}</li>
55   * </ul>
56   *
57   * @see HttpHost
58   * @since 4.2
59   */
60  @ThreadSafe
61  public class BasicConnPool extends AbstractConnPool<HttpHost, HttpClientConnection, BasicPoolEntry> {
62  
63      private static AtomicLong COUNTER = new AtomicLong();
64  
65      public BasicConnPool(final ConnFactory<HttpHost, HttpClientConnection> connFactory) {
66          super(connFactory, 2, 20);
67      }
68  
69      public BasicConnPool(final HttpParams params) {
70          super(new BasicConnFactory(params), 2, 20);
71      }
72  
73      @Override
74      protected BasicPoolEntry createEntry(
75              final HttpHost host,
76              final HttpClientConnection conn) {
77          return new BasicPoolEntry(Long.toString(COUNTER.getAndIncrement()), host, conn);
78      }
79  
80  }