| /* |
| * 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.tinkerpop.gremlin.giraph.process.computer; |
| |
| import org.apache.commons.configuration.Configuration; |
| import org.apache.giraph.conf.GiraphConstants; |
| import org.apache.giraph.worker.WorkerContext; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.HadoopGraph; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.io.HadoopPools; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.io.ObjectWritable; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.util.ConfUtil; |
| import org.apache.tinkerpop.gremlin.process.computer.VertexProgram; |
| import org.apache.tinkerpop.gremlin.process.computer.util.ImmutableMemory; |
| import org.apache.tinkerpop.gremlin.process.computer.util.VertexProgramPool; |
| |
| import java.util.Iterator; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class GiraphWorkerContext extends WorkerContext { |
| |
| private VertexProgramPool vertexProgramPool; |
| private GiraphMemory memory; |
| |
| public GiraphWorkerContext() { |
| // Giraph ReflectionUtils requires this to be public at minimum |
| } |
| |
| public void preApplication() throws InstantiationException, IllegalAccessException { |
| final Configuration apacheConfiguration = ConfUtil.makeApacheConfiguration(this.getContext().getConfiguration()); |
| HadoopPools.initialize(apacheConfiguration); |
| final VertexProgram vertexProgram = VertexProgram.createVertexProgram(HadoopGraph.open(apacheConfiguration), apacheConfiguration); |
| this.vertexProgramPool = new VertexProgramPool(vertexProgram, this.getContext().getConfiguration().getInt(GiraphConstants.NUM_COMPUTE_THREADS.getKey(), 1)); |
| this.memory = new GiraphMemory(this, vertexProgram); |
| } |
| |
| public void postApplication() { |
| |
| } |
| |
| public void preSuperstep() { |
| this.vertexProgramPool.workerIterationStart(new ImmutableMemory(this.memory)); |
| } |
| |
| public void postSuperstep() { |
| this.vertexProgramPool.workerIterationEnd(new ImmutableMemory(this.memory)); |
| } |
| |
| public VertexProgramPool getVertexProgramPool() { |
| return this.vertexProgramPool; |
| } |
| |
| public GiraphMemory getMemory() { |
| return this.memory; |
| } |
| |
| public GiraphMessenger getMessenger(final GiraphVertex giraphVertex, final GiraphComputation giraphComputation, final Iterator<ObjectWritable> messages) { |
| return new GiraphMessenger(giraphVertex, giraphComputation, messages); |
| } |
| } |