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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  
28  package org.apache.hc.client5.http.impl.nio;
29  
30  import java.net.SocketAddress;
31  import java.util.concurrent.Future;
32  
33  import org.apache.hc.client5.http.DnsResolver;
34  import org.apache.hc.core5.annotation.Contract;
35  import org.apache.hc.core5.annotation.ThreadingBehavior;
36  import org.apache.hc.core5.concurrent.FutureCallback;
37  import org.apache.hc.core5.net.NamedEndpoint;
38  import org.apache.hc.core5.reactor.ConnectionInitiator;
39  import org.apache.hc.core5.reactor.IOSession;
40  import org.apache.hc.core5.util.Args;
41  import org.apache.hc.core5.util.Timeout;
42  
43  /**
44   * Multi-home DNS aware implementation of {@link ConnectionInitiator}.
45   *
46   * @since 5.0
47   */
48  @Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL)
49  public final class MultihomeConnectionInitiator implements ConnectionInitiator {
50  
51      private final ConnectionInitiator connectionInitiator;
52      private final MultihomeIOSessionRequester sessionRequester;
53  
54      public MultihomeConnectionInitiator(
55              final ConnectionInitiator connectionInitiator,
56              final DnsResolver dnsResolver) {
57          this.connectionInitiator = Args.notNull(connectionInitiator, "Connection initiator");
58          this.sessionRequester = new MultihomeIOSessionRequester(dnsResolver);
59      }
60  
61      @Override
62      public Future<IOSession> connect(
63              final NamedEndpoint remoteEndpoint,
64              final SocketAddress remoteAddress,
65              final SocketAddress localAddress,
66              final Timeout connectTimeout,
67              final Object attachment,
68              final FutureCallback<IOSession> callback) {
69          Args.notNull(remoteEndpoint, "Remote endpoint");
70          return sessionRequester.connect(connectionInitiator, remoteEndpoint, remoteAddress, localAddress, connectTimeout, attachment, callback);
71      }
72  
73      public Future<IOSession> connect(
74              final NamedEndpoint remoteEndpoint,
75              final SocketAddress localAddress,
76              final Timeout connectTimeout,
77              final Object attachment,
78              final FutureCallback<IOSession> callback) {
79          Args.notNull(remoteEndpoint, "Remote endpoint");
80          return sessionRequester.connect(connectionInitiator, remoteEndpoint, localAddress, connectTimeout, attachment, callback);
81      }
82  
83  }