| /** |
| * 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.tez.dag.app.dag.impl; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Maps; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.tez.dag.api.EdgeProperty; |
| import org.apache.tez.dag.api.InputDescriptor; |
| import org.apache.tez.dag.api.VertexManagerPlugin; |
| import org.apache.tez.dag.api.VertexManagerPluginContext; |
| import org.apache.tez.dag.api.VertexManagerPluginContext.TaskWithLocationHint; |
| import org.apache.tez.dag.api.event.VertexState; |
| import org.apache.tez.dag.api.event.VertexStateUpdate; |
| import org.apache.tez.runtime.api.Event; |
| import org.apache.tez.runtime.api.events.VertexManagerEvent; |
| |
| import java.util.EnumSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| /** |
| * Starts all tasks immediately on vertex start |
| */ |
| public class ImmediateStartVertexManager extends VertexManagerPlugin { |
| |
| private static final Log LOG = LogFactory.getLog(ImmediateStartVertexManager.class); |
| |
| private final Map<String, Boolean> srcVertexConfigured = Maps.newConcurrentMap(); |
| private int managedTasks; |
| private boolean tasksScheduled = false; |
| private AtomicBoolean onVertexStartedDone = new AtomicBoolean(false); |
| |
| public ImmediateStartVertexManager(VertexManagerPluginContext context) { |
| super(context); |
| } |
| |
| @Override |
| public void onVertexStarted(Map<String, List<Integer>> completions) { |
| managedTasks = getContext().getVertexNumTasks(getContext().getVertexName()); |
| Map<String, EdgeProperty> edges = getContext().getInputVertexEdgeProperties(); |
| for (Map.Entry<String, EdgeProperty> entry : edges.entrySet()) { |
| String srcVertex = entry.getKey(); |
| //track vertices with task count > 0 |
| if (getContext().getVertexNumTasks(srcVertex) > 0) { |
| LOG.info("Task count in " + srcVertex + ": " + getContext().getVertexNumTasks(srcVertex)); |
| srcVertexConfigured.put(srcVertex, false); |
| getContext().registerForVertexStateUpdates(srcVertex, EnumSet.of(VertexState.CONFIGURED)); |
| } else { |
| LOG.info("Vertex: " + getContext().getVertexName() + "; Ignoring " + srcVertex |
| + " as it has got 0 tasks"); |
| } |
| } |
| onVertexStartedDone.set(true); |
| scheduleTasks(); |
| } |
| |
| private void scheduleTasks() { |
| if (!onVertexStartedDone.get()) { |
| // vertex not started yet |
| return; |
| } |
| if (tasksScheduled) { |
| // already scheduled |
| return; |
| } |
| |
| if (!canScheduleTasks()) { |
| return; |
| } |
| |
| tasksScheduled = true; |
| List<TaskWithLocationHint> tasksToStart = Lists.newArrayListWithCapacity(managedTasks); |
| for (int i = 0; i < managedTasks; ++i) { |
| tasksToStart.add(new TaskWithLocationHint(new Integer(i), null)); |
| } |
| |
| if (!tasksToStart.isEmpty()) { |
| LOG.info("Starting " + tasksToStart.size() + " in " + getContext().getVertexName()); |
| getContext().scheduleVertexTasks(tasksToStart); |
| } |
| // all tasks scheduled. Can call vertexManagerDone(). |
| // TODO TEZ-1714 for locking issues getContext().vertexManagerDone(); |
| } |
| |
| private boolean canScheduleTasks() { |
| // check for source vertices completely configured |
| for (Map.Entry<String, Boolean> entry : srcVertexConfigured.entrySet()) { |
| if (!entry.getValue().booleanValue()) { |
| // vertex not configured |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Waiting for vertex: " + entry.getKey() + " in vertex: " + getContext().getVertexName()); |
| } |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public void onVertexStateUpdated(VertexStateUpdate stateUpdate) { |
| Preconditions.checkArgument(stateUpdate.getVertexState() == VertexState.CONFIGURED, |
| "Received incorrect state notification : " + stateUpdate.getVertexState() + " for vertex: " |
| + stateUpdate.getVertexName() + " in vertex: " + getContext().getVertexName()); |
| Preconditions.checkArgument(srcVertexConfigured.containsKey(stateUpdate.getVertexName()), |
| "Received incorrect vertex notification : " + stateUpdate.getVertexState() + " for vertex: " |
| + stateUpdate.getVertexName() + " in vertex: " + getContext().getVertexName()); |
| Preconditions.checkState(srcVertexConfigured.put(stateUpdate.getVertexName(), true) |
| .booleanValue() == false); |
| LOG.info("Received configured notification: " + stateUpdate.getVertexState() + " for vertex: " |
| + stateUpdate.getVertexName() + " in vertex: " + getContext().getVertexName()); |
| scheduleTasks(); |
| } |
| |
| @Override |
| public void onSourceTaskCompleted(String srcVertexName, Integer attemptId) { |
| } |
| |
| @Override |
| public void initialize() { |
| } |
| |
| @Override |
| public void onVertexManagerEventReceived(VertexManagerEvent vmEvent) { |
| } |
| |
| @Override |
| public void onRootVertexInitialized(String inputName, |
| InputDescriptor inputDescriptor, List<Event> events) { |
| } |
| |
| } |