| /* |
| * 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.tinkergraph.process.computer; |
| |
| import org.apache.commons.lang3.concurrent.BasicThreadFactory; |
| import org.apache.tinkerpop.gremlin.process.computer.MapReduce; |
| import org.apache.tinkerpop.gremlin.process.computer.VertexProgram; |
| import org.apache.tinkerpop.gremlin.process.computer.util.MapReducePool; |
| import org.apache.tinkerpop.gremlin.process.computer.util.VertexProgramPool; |
| |
| import java.util.concurrent.CompletionService; |
| import java.util.concurrent.ExecutorCompletionService; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.function.Consumer; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| * @author Stephen Mallette (http://stephen.genoprime.com) |
| */ |
| public final class TinkerWorkerPool implements AutoCloseable { |
| |
| private static final BasicThreadFactory THREAD_FACTORY_WORKER = new BasicThreadFactory.Builder().namingPattern("tinker-worker-%d").build(); |
| |
| private final int numberOfWorkers; |
| private final ExecutorService workerPool; |
| private final CompletionService<Object> completionService; |
| |
| private VertexProgramPool vertexProgramPool; |
| private MapReducePool mapReducePool; |
| |
| public TinkerWorkerPool(final int numberOfWorkers) { |
| this.numberOfWorkers = numberOfWorkers; |
| this.workerPool = Executors.newFixedThreadPool(numberOfWorkers, THREAD_FACTORY_WORKER); |
| this.completionService = new ExecutorCompletionService<>(this.workerPool); |
| } |
| |
| public void setVertexProgram(final VertexProgram vertexProgram) { |
| this.vertexProgramPool = new VertexProgramPool(vertexProgram, this.numberOfWorkers); |
| } |
| |
| public void setMapReduce(final MapReduce mapReduce) { |
| this.mapReducePool = new MapReducePool(mapReduce, this.numberOfWorkers); |
| } |
| |
| public void executeVertexProgram(final Consumer<VertexProgram> worker) throws InterruptedException { |
| for (int i = 0; i < this.numberOfWorkers; i++) { |
| this.completionService.submit(() -> { |
| final VertexProgram vp = this.vertexProgramPool.take(); |
| worker.accept(vp); |
| this.vertexProgramPool.offer(vp); |
| return null; |
| }); |
| } |
| for (int i = 0; i < this.numberOfWorkers; i++) { |
| try { |
| this.completionService.take().get(); |
| } catch (InterruptedException ie) { |
| throw ie; |
| } catch (final Exception e) { |
| throw new IllegalStateException(e.getMessage(), e); |
| } |
| } |
| } |
| |
| public void executeMapReduce(final Consumer<MapReduce> worker) throws InterruptedException { |
| for (int i = 0; i < this.numberOfWorkers; i++) { |
| this.completionService.submit(() -> { |
| final MapReduce mr = this.mapReducePool.take(); |
| worker.accept(mr); |
| this.mapReducePool.offer(mr); |
| return null; |
| }); |
| } |
| for (int i = 0; i < this.numberOfWorkers; i++) { |
| try { |
| this.completionService.take().get(); |
| } catch (InterruptedException ie) { |
| throw ie; |
| } catch (final Exception e) { |
| throw new IllegalStateException(e.getMessage(), e); |
| } |
| } |
| } |
| |
| public void closeNow() throws Exception { |
| this.workerPool.shutdownNow(); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| this.workerPool.shutdown(); |
| } |
| } |