| /* |
| * 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.beam.runners.apex; |
| |
| import com.datatorrent.api.DAG; |
| import java.io.IOException; |
| import javax.annotation.Nullable; |
| import org.apache.apex.api.Launcher.AppHandle; |
| import org.apache.apex.api.Launcher.ShutdownMode; |
| import org.apache.beam.sdk.Pipeline; |
| import org.apache.beam.sdk.PipelineResult; |
| import org.apache.beam.sdk.metrics.MetricResults; |
| import org.joda.time.Duration; |
| |
| /** |
| * Result of executing a {@link Pipeline} with Apex in embedded mode. |
| */ |
| public class ApexRunnerResult implements PipelineResult { |
| private final DAG apexDAG; |
| private final AppHandle apexApp; |
| private State state = State.UNKNOWN; |
| |
| public ApexRunnerResult(DAG dag, AppHandle apexApp) { |
| this.apexDAG = dag; |
| this.apexApp = apexApp; |
| } |
| |
| @Override |
| public State getState() { |
| return state; |
| } |
| |
| @Override |
| public State cancel() throws IOException { |
| apexApp.shutdown(ShutdownMode.KILL); |
| state = State.CANCELLED; |
| return state; |
| } |
| |
| @Override |
| @Nullable |
| public State waitUntilFinish(@Nullable Duration duration) { |
| long timeout = (duration == null || duration.getMillis() < 1) ? Long.MAX_VALUE |
| : System.currentTimeMillis() + duration.getMillis(); |
| try { |
| while (!apexApp.isFinished() && System.currentTimeMillis() < timeout) { |
| if (ApexRunner.ASSERTION_ERROR.get() != null) { |
| throw ApexRunner.ASSERTION_ERROR.get(); |
| } |
| Thread.sleep(500); |
| } |
| return apexApp.isFinished() ? State.DONE : null; |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public State waitUntilFinish() { |
| return waitUntilFinish(null); |
| } |
| |
| @Override |
| public MetricResults metrics() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| /** |
| * Return the DAG executed by the pipeline. |
| * @return DAG from translation. |
| */ |
| public DAG getApexDAG() { |
| return apexDAG; |
| } |
| |
| } |