| /* |
| * 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.java.execution; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.List; |
| import org.apache.wayang.core.api.Job; |
| import org.apache.wayang.core.api.exception.WayangException; |
| import org.apache.wayang.core.function.ExtendedFunction; |
| import org.apache.wayang.core.optimizer.OptimizationContext; |
| import org.apache.wayang.core.plan.executionplan.ExecutionTask; |
| import org.apache.wayang.core.plan.wayangplan.ExecutionOperator; |
| import org.apache.wayang.core.platform.ChannelInstance; |
| import org.apache.wayang.core.platform.Executor; |
| import org.apache.wayang.core.platform.PartialExecution; |
| import org.apache.wayang.core.platform.PushExecutorTemplate; |
| import org.apache.wayang.core.platform.lineage.ExecutionLineageNode; |
| import org.apache.wayang.core.util.Formats; |
| import org.apache.wayang.core.util.Tuple; |
| import org.apache.wayang.java.compiler.FunctionCompiler; |
| import org.apache.wayang.java.operators.JavaExecutionOperator; |
| import org.apache.wayang.java.platform.JavaPlatform; |
| |
| /** |
| * {@link Executor} implementation for the {@link JavaPlatform}. |
| */ |
| public class JavaExecutor extends PushExecutorTemplate { |
| |
| private final JavaPlatform platform; |
| |
| private final FunctionCompiler compiler; |
| |
| public JavaExecutor(JavaPlatform javaPlatform, Job job) { |
| super(job); |
| this.platform = javaPlatform; |
| this.compiler = new FunctionCompiler(job.getConfiguration()); |
| } |
| |
| @Override |
| public JavaPlatform getPlatform() { |
| return this.platform; |
| } |
| |
| @Override |
| protected Tuple<List<ChannelInstance>, PartialExecution> execute( |
| ExecutionTask task, |
| List<ChannelInstance> inputChannelInstances, |
| OptimizationContext.OperatorContext producerOperatorContext, |
| boolean isRequestEagerExecution |
| ) { |
| // Provide the ChannelInstances for the output of the task. |
| final ChannelInstance[] outputChannelInstances = task.getOperator().createOutputChannelInstances( |
| this, task, producerOperatorContext, inputChannelInstances |
| ); |
| |
| // Execute. |
| final Collection<ExecutionLineageNode> executionLineageNodes; |
| final Collection<ChannelInstance> producedChannelInstances; |
| // TODO: Use proper progress estimator. |
| this.job.reportProgress(task.getOperator().getName(), 50); |
| long startTime = System.currentTimeMillis(); |
| try { |
| final Tuple<Collection<ExecutionLineageNode>, Collection<ChannelInstance>> results = |
| cast(task.getOperator()).evaluate( |
| toArray(inputChannelInstances), |
| outputChannelInstances, |
| this, |
| producerOperatorContext |
| ); |
| //Thread.sleep(1000); |
| executionLineageNodes = results.getField0(); |
| producedChannelInstances = results.getField1(); |
| } catch (Exception e) { |
| throw new WayangException(String.format("Executing %s failed.", task), e); |
| } |
| long endTime = System.currentTimeMillis(); |
| long executionDuration = endTime - startTime; |
| |
| this.job.reportProgress(task.getOperator().getName(), 100); |
| |
| // Check how much we executed. |
| PartialExecution partialExecution = this.createPartialExecution(executionLineageNodes, executionDuration); |
| |
| if (partialExecution == null && executionDuration > 10) { |
| this.logger.warn("Execution of {} took suspiciously long ({}).", task, Formats.formatDuration(executionDuration)); |
| } |
| |
| // Collect any cardinality updates. |
| this.registerMeasuredCardinalities(producedChannelInstances); |
| |
| // Warn if requested eager execution did not take place. |
| if (isRequestEagerExecution && partialExecution == null) { |
| this.logger.info("{} was not executed eagerly as requested.", task); |
| } |
| |
| return new Tuple<>(Arrays.asList(outputChannelInstances), partialExecution); |
| } |
| |
| |
| private static JavaExecutionOperator cast(ExecutionOperator executionOperator) { |
| return (JavaExecutionOperator) executionOperator; |
| } |
| |
| private static ChannelInstance[] toArray(List<ChannelInstance> channelInstances) { |
| final ChannelInstance[] array = new ChannelInstance[channelInstances.size()]; |
| return channelInstances.toArray(array); |
| } |
| |
| /** |
| * Utility function to open an {@link ExtendedFunction}. |
| * |
| * @param operator the {@link JavaExecutionOperator} containing the function |
| * @param function the {@link ExtendedFunction}; if it is of a different type, nothing happens |
| * @param inputs the input {@link ChannelInstance}s for the {@code operator} |
| * @param operatorContext context information for the {@code operator} |
| */ |
| public static void openFunction(JavaExecutionOperator operator, |
| Object function, |
| ChannelInstance[] inputs, |
| OptimizationContext.OperatorContext operatorContext) { |
| if (function instanceof ExtendedFunction) { |
| ExtendedFunction extendedFunction = (ExtendedFunction) function; |
| int iterationNumber = operatorContext.getOptimizationContext().getIterationNumber(); |
| extendedFunction.open(new JavaExecutionContext(operator, inputs, iterationNumber)); |
| } |
| } |
| |
| public FunctionCompiler getCompiler() { |
| return this.compiler; |
| } |
| } |