| /** |
| * 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.apex.engine; |
| |
| import java.io.File; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.net.URLClassLoader; |
| |
| import org.apache.apex.api.EmbeddedAppLauncher; |
| import org.apache.hadoop.conf.Configuration; |
| |
| import com.datatorrent.api.Attribute; |
| import com.datatorrent.api.Context; |
| import com.datatorrent.api.DAG; |
| import com.datatorrent.api.LocalMode; |
| import com.datatorrent.api.StreamingApplication; |
| import com.datatorrent.stram.StramClient; |
| import com.datatorrent.stram.StramLocalCluster; |
| import com.datatorrent.stram.StramUtils; |
| import com.datatorrent.stram.plan.logical.LogicalPlan; |
| import com.datatorrent.stram.plan.logical.LogicalPlanConfiguration; |
| |
| /** |
| * An implementation of {@link EmbeddedAppLauncher} to launch applications directly in the current Java VM. |
| * |
| * TODO: When LocalMode is removed, make this class extend EmbeddedAppLauncher directly |
| * @since 0.3.2 |
| */ |
| public class EmbeddedAppLauncherImpl extends LocalMode<EmbeddedAppLauncherImpl.EmbeddedAppHandleImpl> |
| { |
| private final LogicalPlan lp = new LogicalPlan(); |
| |
| @Override |
| public DAG getDAG() |
| { |
| return lp; |
| } |
| |
| @Override |
| public DAG cloneDAG() throws Exception |
| { |
| return StramLocalCluster.cloneLogicalPlan(lp); |
| } |
| |
| @Override |
| public EmbeddedAppHandleImpl launchApp(StreamingApplication application, Configuration configuration, Attribute.AttributeMap |
| launchParameters) throws LauncherException |
| { |
| try { |
| prepareDAG(application, configuration); |
| } catch (Exception e) { |
| throw new LauncherException(e); |
| } |
| StramLocalCluster lc = getController(); |
| boolean launched = false; |
| if (launchParameters != null) { |
| if (StramUtils.getValueWithDefault(launchParameters, SERIALIZE_DAG)) { |
| // Check if DAG can be serialized |
| try { |
| cloneDAG(); |
| } catch (Exception e) { |
| throw new LauncherException(e); |
| } |
| } |
| lc.setHeartbeatMonitoringEnabled(StramUtils.getValueWithDefault(launchParameters, HEARTBEAT_MONITORING)); |
| if (StramUtils.getValueWithDefault(launchParameters, RUN_ASYNC)) { |
| lc.runAsync(); |
| launched = true; |
| } else { |
| Long runMillis = StramUtils.getValueWithDefault(launchParameters, RUN_MILLIS); |
| if (runMillis != null) { |
| lc.run(runMillis); |
| launched = true; |
| } |
| } |
| } |
| if (!launched) { |
| lc.run(); |
| } |
| return new EmbeddedAppHandleImpl(lc); |
| } |
| |
| @Override |
| public DAG prepareDAG(StreamingApplication app, Configuration conf) throws Exception |
| { |
| if (app == null && conf == null) { |
| throw new IllegalArgumentException("Require app or configuration to populate logical plan."); |
| } |
| if (conf == null) { |
| conf = new Configuration(false); |
| } |
| LogicalPlanConfiguration lpc = new LogicalPlanConfiguration(conf); |
| String appName = app != null ? app.getClass().getName() : "unknown"; |
| lpc.prepareDAG(lp, app, appName); |
| return lp; |
| } |
| |
| @Override |
| public StramLocalCluster getController() |
| { |
| try { |
| addLibraryJarsToClasspath(lp); |
| return new StramLocalCluster(lp); |
| } catch (Exception e) { |
| throw new RuntimeException("Error creating local cluster", e); |
| } |
| } |
| |
| private void addLibraryJarsToClasspath(LogicalPlan lp) throws MalformedURLException |
| { |
| String libJarsCsv = lp.getAttributes().get(Context.DAGContext.LIBRARY_JARS); |
| |
| if (libJarsCsv != null && libJarsCsv.length() != 0) { |
| String[] split = libJarsCsv.split(StramClient.LIB_JARS_SEP); |
| if (split.length != 0) { |
| URL[] urlList = new URL[split.length]; |
| for (int i = 0; i < split.length; i++) { |
| File file = new File(split[i]); |
| urlList[i] = file.toURI().toURL(); |
| } |
| |
| // Set class loader. |
| ClassLoader prevCl = Thread.currentThread().getContextClassLoader(); |
| URLClassLoader cl = URLClassLoader.newInstance(urlList, prevCl); |
| Thread.currentThread().setContextClassLoader(cl); |
| } |
| } |
| |
| } |
| |
| public static class EmbeddedAppHandleImpl implements EmbeddedAppLauncher.EmbeddedAppHandle |
| { |
| final StramLocalCluster controller; |
| |
| public EmbeddedAppHandleImpl(StramLocalCluster controller) |
| { |
| this.controller = controller; |
| } |
| |
| @Override |
| public boolean isFinished() |
| { |
| return controller.isFinished(); |
| } |
| |
| @Override |
| public void shutdown(ShutdownMode shutdownMode) throws LauncherException |
| { |
| controller.shutdown(); |
| } |
| |
| } |
| } |