| /** |
| * 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.hadoop.tools.rumen; |
| |
| import java.util.Set; |
| import java.util.HashSet; |
| import java.util.Properties; |
| import java.util.StringTokenizer; |
| |
| import org.apache.hadoop.mapreduce.jobhistory.HistoryEvent; |
| import org.apache.hadoop.mapreduce.jobhistory.TaskAttemptFinishedEvent; |
| import org.apache.hadoop.mapreduce.jobhistory.TaskAttemptUnsuccessfulCompletionEvent; |
| import org.apache.hadoop.mapreduce.jobhistory.MapAttemptFinishedEvent; |
| import org.apache.hadoop.mapreduce.jobhistory.ReduceAttemptFinishedEvent; |
| import org.apache.hadoop.mapreduce.jobhistory.TaskStartedEvent; |
| |
| /** |
| * Building the cluster topology. |
| */ |
| public class TopologyBuilder { |
| private Set<ParsedHost> allHosts = new HashSet<ParsedHost>(); |
| |
| /** |
| * Process one {@link HistoryEvent} |
| * |
| * @param event |
| * The {@link HistoryEvent} to be processed. |
| */ |
| public void process(HistoryEvent event) { |
| if (event instanceof TaskAttemptFinishedEvent) { |
| processTaskAttemptFinishedEvent((TaskAttemptFinishedEvent) event); |
| } else if (event instanceof TaskAttemptUnsuccessfulCompletionEvent) { |
| processTaskAttemptUnsuccessfulCompletionEvent((TaskAttemptUnsuccessfulCompletionEvent) event); |
| } else if (event instanceof TaskStartedEvent) { |
| processTaskStartedEvent((TaskStartedEvent) event); |
| } else if (event instanceof MapAttemptFinishedEvent) { |
| processMapAttemptFinishedEvent((MapAttemptFinishedEvent) event); |
| } else if (event instanceof ReduceAttemptFinishedEvent) { |
| processReduceAttemptFinishedEvent((ReduceAttemptFinishedEvent) event); |
| } |
| |
| // I do NOT expect these if statements to be exhaustive. |
| } |
| |
| /** |
| * Process a collection of JobConf {@link Properties}. We do not restrict it |
| * to be called once. |
| * |
| * @param conf |
| * The job conf properties to be added. |
| */ |
| public void process(Properties conf) { |
| // no code |
| } |
| |
| /** |
| * Request the builder to build the final object. Once called, the |
| * {@link TopologyBuilder} would accept no more events or job-conf properties. |
| * |
| * @return Parsed {@link LoggedNetworkTopology} object. |
| */ |
| public LoggedNetworkTopology build() { |
| return new LoggedNetworkTopology(allHosts); |
| } |
| |
| private void processTaskStartedEvent(TaskStartedEvent event) { |
| preferredLocationForSplits(event.getSplitLocations()); |
| } |
| |
| private void processTaskAttemptUnsuccessfulCompletionEvent( |
| TaskAttemptUnsuccessfulCompletionEvent event) { |
| recordParsedHost(event.getHostname(), event.getRackName()); |
| } |
| |
| private void processTaskAttemptFinishedEvent(TaskAttemptFinishedEvent event) { |
| recordParsedHost(event.getHostname(), event.getRackName()); |
| } |
| |
| private void processMapAttemptFinishedEvent(MapAttemptFinishedEvent event) { |
| recordParsedHost(event.getHostname(), event.getRackName()); |
| } |
| |
| private void processReduceAttemptFinishedEvent(ReduceAttemptFinishedEvent event) { |
| recordParsedHost(event.getHostname(), event.getRackName()); |
| } |
| |
| private void recordParsedHost(String hostName, String rackName) { |
| if (hostName == null) { |
| return; |
| } |
| ParsedHost result = null; |
| if (rackName == null) { |
| result = ParsedHost.parse(hostName); |
| } else { |
| result = new ParsedHost(rackName, hostName); |
| } |
| |
| |
| if (result != null && !allHosts.contains(result)) { |
| allHosts.add(result); |
| } |
| } |
| |
| private void recordParsedHost(String nodeName) { |
| ParsedHost result = ParsedHost.parse(nodeName); |
| |
| if (result != null && !allHosts.contains(result)) { |
| allHosts.add(result); |
| } |
| } |
| |
| private void preferredLocationForSplits(String splits) { |
| if (splits != null) { |
| StringTokenizer tok = new StringTokenizer(splits, ",", false); |
| |
| while (tok.hasMoreTokens()) { |
| String nextSplit = tok.nextToken(); |
| |
| recordParsedHost(nextSplit); |
| } |
| } |
| } |
| } |