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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.ContentType;
32  import org.apache.hc.core5.http.HttpException;
33  import org.apache.hc.core5.http.HttpResponse;
34  import org.apache.hc.core5.http.HttpStatus;
35  import org.apache.hc.core5.http.message.BasicHttpResponse;
36  import org.apache.hc.core5.http.nio.entity.BasicAsyncEntityProducer;
37  import org.apache.hc.core5.util.Args;
38  
39  /**
40   * @since 5.0
41   */
42  public class BasicResponseProducer implements AsyncResponseProducer {
43  
44      private final HttpResponse response;
45      private final AsyncEntityProducer dataProducer;
46  
47      public BasicResponseProducer(final HttpResponse response, final AsyncEntityProducer dataProducer) {
48          this.response = Args.notNull(response, "Response");
49          this.dataProducer = dataProducer;
50      }
51  
52      public BasicResponseProducer(final HttpResponse response) {
53          this.response = Args.notNull(response, "Response");
54          this.dataProducer = null;
55      }
56  
57      public BasicResponseProducer(final int code, final AsyncEntityProducer dataProducer) {
58          this(new BasicHttpResponse(code), dataProducer);
59      }
60  
61      public BasicResponseProducer(final HttpResponse response, final String message, final ContentType contentType) {
62          this(response, new BasicAsyncEntityProducer(message, contentType));
63      }
64  
65      public BasicResponseProducer(final HttpResponse response, final String message) {
66          this(response, message, ContentType.TEXT_PLAIN);
67      }
68  
69      public BasicResponseProducer(final int code, final String message, final ContentType contentType) {
70          this(new BasicHttpResponse(code), message, contentType);
71      }
72  
73      public BasicResponseProducer(final int code, final String message) {
74          this(new BasicHttpResponse(code), message);
75      }
76  
77      public BasicResponseProducer(final AsyncEntityProducer dataProducer) {
78          this(HttpStatus.SC_OK, dataProducer);
79      }
80  
81      @Override
82      public void sendResponse(final ResponseChannel responseChannel) throws HttpException, IOException {
83          responseChannel.sendResponse(response, dataProducer);
84      }
85  
86      @Override
87      public int available() {
88          return dataProducer != null ? dataProducer.available() : 0;
89      }
90  
91      @Override
92      public void produce(final DataStreamChannel channel) throws IOException {
93          if (dataProducer != null) {
94              dataProducer.produce(channel);
95          }
96      }
97  
98      @Override
99      public void failed(final Exception cause) {
100         releaseResources();
101     }
102 
103     @Override
104     public void releaseResources() {
105         if (dataProducer != null) {
106             dataProducer.releaseResources();
107         }
108     }
109 
110 }