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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.entity;
28  
29  import java.io.IOException;
30  import java.nio.ByteBuffer;
31  import java.util.List;
32  
33  import org.apache.hc.core5.concurrent.FutureCallback;
34  import org.apache.hc.core5.http.EntityDetails;
35  import org.apache.hc.core5.http.Header;
36  import org.apache.hc.core5.http.HttpException;
37  import org.apache.hc.core5.http.nio.AsyncEntityConsumer;
38  import org.apache.hc.core5.http.nio.CapacityChannel;
39  
40  /**
41   * @since 5.0
42   */
43  public final class NoopEntityConsumer implements AsyncEntityConsumer<Void> {
44  
45      private volatile FutureCallback<Void> resultCallback;
46  
47      @Override
48      public final void streamStart(
49              final EntityDetails entityDetails,
50              final FutureCallback<Void> resultCallback) throws IOException, HttpException {
51          this.resultCallback = resultCallback;
52      }
53  
54      @Override
55      public void updateCapacity(final CapacityChannel capacityChannel) throws IOException {
56          capacityChannel.update(Integer.MAX_VALUE);
57      }
58  
59      @Override
60      public final int consume(final ByteBuffer src) throws IOException {
61          return Integer.MAX_VALUE;
62      }
63  
64      @Override
65      public final void streamEnd(final List<? extends Header> trailers) throws IOException {
66          if (resultCallback != null) {
67              resultCallback.completed(null);
68          }
69      }
70  
71      @Override
72      public void failed(final Exception cause) {
73          if (resultCallback != null) {
74              resultCallback.failed(cause);
75          }
76      }
77  
78      @Override
79      public Void getContent() {
80          return null;
81      }
82  
83      @Override
84      public void releaseResources() {
85      }
86  
87  }