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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.hc.core5.http.nio;
28  
29  import java.io.IOException;
30  
31  import org.apache.hc.core5.http.HttpException;
32  import org.apache.hc.core5.http.HttpResponse;
33  import org.apache.hc.core5.http.HttpStatus;
34  import org.apache.hc.core5.http.message.BasicHttpResponse;
35  import org.apache.hc.core5.util.Args;
36  
37  /**
38   * @since 5.0
39   */
40  public class BasicPushProducer implements AsyncPushProducer {
41  
42      private final HttpResponse response;
43      private final AsyncEntityProducer dataProducer;
44  
45      public BasicPushProducer(final HttpResponse response, final AsyncEntityProducer dataProducer) {
46          this.response = Args.notNull(response, "Response");
47          this.dataProducer = Args.notNull(dataProducer, "Entity producer");
48      }
49  
50      public BasicPushProducer(final int code, final AsyncEntityProducer dataProducer) {
51          this(new BasicHttpResponse(code), dataProducer);
52      }
53  
54      public BasicPushProducer(final AsyncEntityProducer dataProducer) {
55          this(HttpStatus.SC_OK, dataProducer);
56      }
57  
58      @Override
59      public void produceResponse(final ResponseChannel channel) throws HttpException, IOException {
60          channel.sendResponse(response, dataProducer);
61      }
62  
63      @Override
64      public int available() {
65          return dataProducer != null ? dataProducer.available() : 0;
66      }
67  
68      @Override
69      public void produce(final DataStreamChannel channel) throws IOException {
70          if (dataProducer != null) {
71              dataProducer.produce(channel);
72          }
73      }
74  
75      @Override
76      public void failed(final Exception cause) {
77          releaseResources();
78      }
79  
80      @Override
81      public void releaseResources() {
82          if (dataProducer != null) {
83              dataProducer.releaseResources();
84          }
85      }
86  
87  }