/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.apache.giraph.io.internal;

 import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;

 import org.apache.giraph.graph.Vertex;

 import org.apache.giraph.io.VertexOutputFormat;

 import org.apache.giraph.io.VertexWriter;

 import org.apache.giraph.job.HadoopUtils;

 import org.apache.hadoop.io.Writable;

 import org.apache.hadoop.io.WritableComparable;

 import org.apache.hadoop.mapreduce.JobContext;

 import org.apache.hadoop.mapreduce.JobStatus;

 import org.apache.hadoop.mapreduce.OutputCommitter;

 import org.apache.hadoop.mapreduce.TaskAttemptContext;

 import java.io.IOException;

 /**

  * For internal use only.

  *

  * Wraps user set {@link VertexOutputFormat} to make sure proper configuration

  * parameters are passed around, that user can set parameters in

  * configuration and they will be available in other methods related to this

  * format.

  *

  * @param <I> Vertex id

  * @param <V> Vertex data

  * @param <E> Edge data

  */

 public class WrappedVertexOutputFormat<I extends WritableComparable,

     V extends Writable, E extends Writable>

     extends VertexOutputFormat<I, V, E> {

   /** {@link VertexOutputFormat} which is wrapped */

   private VertexOutputFormat<I, V, E> originalOutputFormat;

   /**

    * Constructor

    *

    * @param vertexOutputFormat Vertex output format to wrap

    */

   public WrappedVertexOutputFormat(

       VertexOutputFormat<I, V, E> vertexOutputFormat) {

     originalOutputFormat = vertexOutputFormat;

   }

   @Override

   public VertexWriter<I, V, E> createVertexWriter(

       TaskAttemptContext context) throws IOException, InterruptedException {

     final VertexWriter<I, V, E> vertexWriter =

         originalOutputFormat.createVertexWriter(

             HadoopUtils.makeTaskAttemptContext(getConf(), context));

     return new VertexWriter<I, V, E>() {

       @Override

       public void setConf(

           ImmutableClassesGiraphConfiguration<I, V, E> conf) {

         super.setConf(conf);

         vertexWriter.setConf(conf);

       }

       @Override

       public void initialize(

           TaskAttemptContext context) throws IOException, InterruptedException {

         vertexWriter.initialize(

             HadoopUtils.makeTaskAttemptContext(getConf(), context));

       }

       @Override

       public void close(

           TaskAttemptContext context) throws IOException, InterruptedException {

         vertexWriter.close(

             HadoopUtils.makeTaskAttemptContext(getConf(), context));

       }

       @Override

       public void writeVertex(

           Vertex<I, V, E> vertex) throws IOException, InterruptedException {

         vertexWriter.writeVertex(vertex);

       }

     };

   }

   @Override

   public void checkOutputSpecs(

       JobContext context) throws IOException, InterruptedException {

     originalOutputFormat.checkOutputSpecs(

         HadoopUtils.makeJobContext(getConf(), context));

   }

   @Override

   public OutputCommitter getOutputCommitter(

       TaskAttemptContext context) throws IOException, InterruptedException {

     final OutputCommitter outputCommitter =

         originalOutputFormat.getOutputCommitter(

             HadoopUtils.makeTaskAttemptContext(getConf(), context));

     return new OutputCommitter() {

       @Override

       public void setupJob(JobContext context) throws IOException {

         outputCommitter.setupJob(

             HadoopUtils.makeJobContext(getConf(), context));

       }

       @Override

       public void setupTask(TaskAttemptContext context) throws IOException {

         outputCommitter.setupTask(

             HadoopUtils.makeTaskAttemptContext(getConf(), context));

       }

       @Override

       public boolean needsTaskCommit(

           TaskAttemptContext context) throws IOException {

         return outputCommitter.needsTaskCommit(

             HadoopUtils.makeTaskAttemptContext(getConf(), context));

       }

       @Override

       public void commitTask(TaskAttemptContext context) throws IOException {

         outputCommitter.commitTask(

             HadoopUtils.makeTaskAttemptContext(getConf(), context));

       }

       @Override

       public void abortTask(TaskAttemptContext context) throws IOException {

         outputCommitter.abortTask(

             HadoopUtils.makeTaskAttemptContext(getConf(), context));

       }

       @Override

       public void cleanupJob(JobContext context) throws IOException {

         outputCommitter.cleanupJob(

             HadoopUtils.makeJobContext(getConf(), context));

       }

       @Override

       public void commitJob(JobContext context) throws IOException {

         outputCommitter.commitJob(

             HadoopUtils.makeJobContext(getConf(), context));

       }

       @Override

       public void abortJob(JobContext context,

           JobStatus.State state) throws IOException {

         outputCommitter.abortJob(

             HadoopUtils.makeJobContext(getConf(), context), state);

       }

     };

   }

   @Override

   public void preWriting(TaskAttemptContext context) {

     originalOutputFormat.preWriting(context);

   }

   @Override

   public void postWriting(TaskAttemptContext context) {

     originalOutputFormat.postWriting(context);

   }

 }