| /* |
| * 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.wayang.giraph.execution; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.LinkedList; |
| import java.util.Queue; |
| import java.util.Set; |
| import org.apache.giraph.conf.GiraphConfiguration; |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.api.Job; |
| import org.apache.wayang.core.optimizer.OptimizationContext; |
| import org.apache.wayang.core.plan.executionplan.ExecutionStage; |
| import org.apache.wayang.core.plan.executionplan.ExecutionTask; |
| import org.apache.wayang.core.platform.ChannelInstance; |
| import org.apache.wayang.core.platform.ExecutionState; |
| import org.apache.wayang.core.platform.Executor; |
| import org.apache.wayang.core.platform.ExecutorTemplate; |
| import org.apache.wayang.core.platform.PartialExecution; |
| import org.apache.wayang.core.platform.lineage.ExecutionLineageNode; |
| import org.apache.wayang.core.util.Tuple; |
| import org.apache.wayang.giraph.operators.GiraphExecutionOperator; |
| import org.apache.wayang.giraph.platform.GiraphPlatform; |
| |
| /** |
| * {@link Executor} for the {@link GiraphPlatform}. |
| */ |
| public class GiraphExecutor extends ExecutorTemplate { |
| private final GiraphPlatform platform; |
| |
| private Configuration configuration; |
| |
| private Job job; |
| |
| private GiraphConfiguration giraphConfiguration; |
| |
| public GiraphExecutor(GiraphPlatform platform, Job job) { |
| super(job.getCrossPlatformExecutor()); |
| this.job = job; |
| this.platform = platform; |
| this.configuration = job.getConfiguration(); |
| |
| this.giraphConfiguration = new GiraphConfiguration(); |
| } |
| |
| @Override |
| public void execute(final ExecutionStage stage, OptimizationContext optimizationContext, ExecutionState executionState) { |
| Queue<ExecutionTask> scheduledTasks = new LinkedList<>(stage.getStartTasks()); |
| Set<ExecutionTask> executedTasks = new HashSet<>(); |
| |
| while (!scheduledTasks.isEmpty()) { |
| final ExecutionTask task = scheduledTasks.poll(); |
| if (executedTasks.contains(task)) continue; |
| this.execute(task, optimizationContext, executionState); |
| executedTasks.add(task); |
| Arrays.stream(task.getOutputChannels()) |
| .flatMap(channel -> channel.getConsumers().stream()) |
| .filter(consumer -> consumer.getStage() == stage) |
| .forEach(scheduledTasks::add); |
| } |
| } |
| |
| /** |
| * Brings the given {@code task} into execution. |
| */ |
| private void execute(ExecutionTask task, OptimizationContext optimizationContext, ExecutionState executionState) { |
| final GiraphExecutionOperator giraphExecutionOperator = (GiraphExecutionOperator) task.getOperator(); |
| |
| ChannelInstance[] inputChannelInstances = new ChannelInstance[task.getNumInputChannels()]; |
| for (int i = 0; i < inputChannelInstances.length; i++) { |
| inputChannelInstances[i] = executionState.getChannelInstance(task.getInputChannel(i)); |
| } |
| final OptimizationContext.OperatorContext operatorContext = optimizationContext.getOperatorContext(giraphExecutionOperator); |
| ChannelInstance[] outputChannelInstances = new ChannelInstance[task.getNumOuputChannels()]; |
| for (int i = 0; i < outputChannelInstances.length; i++) { |
| outputChannelInstances[i] = task.getOutputChannel(i).createInstance(this, operatorContext, i); |
| } |
| |
| long startTime = System.currentTimeMillis(); |
| final Tuple<Collection<ExecutionLineageNode>, Collection<ChannelInstance>> results = |
| giraphExecutionOperator.execute(inputChannelInstances, outputChannelInstances, this, operatorContext); |
| long endTime = System.currentTimeMillis(); |
| |
| final Collection<ExecutionLineageNode> executionLineageNodes = results.getField0(); |
| final Collection<ChannelInstance> producedChannelInstances = results.getField1(); |
| |
| for (ChannelInstance outputChannelInstance : outputChannelInstances) { |
| if (outputChannelInstance != null) { |
| executionState.register(outputChannelInstance); |
| } |
| } |
| |
| final PartialExecution partialExecution = this.createPartialExecution(executionLineageNodes, endTime - startTime); |
| executionState.add(partialExecution); |
| this.registerMeasuredCardinalities(producedChannelInstances); |
| } |
| |
| @Override |
| public void dispose() { |
| // Maybe clean up some files? |
| } |
| |
| @Override |
| public GiraphPlatform getPlatform() { |
| return this.platform; |
| } |
| |
| public GiraphConfiguration getGiraphConfiguration(){ |
| return this.giraphConfiguration; |
| } |
| } |