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RequestUtils xref
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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  
19  package org.apache.giraph.utils;
20  
21  import io.netty.buffer.ByteBuf;
22  import io.netty.buffer.ByteBufInputStream;
23  import org.apache.giraph.comm.requests.WritableRequest;
24  
25  import java.io.IOException;
26  import org.apache.log4j.Logger;
27  
28  /**
29   * RequestUtils utility class
30   */
31  public class RequestUtils {
32    /** Logger */
33    public static final Logger LOG = Logger.getLogger(RequestUtils.class);
34  
35    /**
36     * Private Constructor
37     */
38    private RequestUtils() {
39    }
40  
41    /**
42     * decodeWritableRequest based on predicate
43     *
44     * @param buf ByteBuf
45     * @param request writableRequest
46     * @return properly initialized writableRequest
47     * @throws IOException
48     */
49    public static WritableRequest decodeWritableRequest(ByteBuf buf,
50      WritableRequest request) throws IOException {
51      ByteBufInputStream input = new ByteBufInputStream(buf);
52      request.readFields(input);
53      return request;
54    }
55  }