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VertexPostprocessor 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  package org.apache.giraph.block_app.framework.piece.interfaces;
19  
20  import org.apache.giraph.writable.kryo.markers.NonKryoWritable;
21  
22  /**
23   * Interface containing a single function - postprocess.
24   *
25   * Marked to not allow seriazliation, as it should be created on the worker,
26   * so should never be serialiized, disallow only for catching problems early.
27   */
28  public interface VertexPostprocessor extends NonKryoWritable {
29    /**
30     * Override to finish computation. This method is executed exactly once
31     * after computation for all vertices in the partition is complete.
32     */
33    void postprocess();
34  }