| // Copyright 2016 Twitter. All rights reserved. |
| // |
| // Licensed 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 com.twitter.heron.examples; |
| |
| import java.util.Map; |
| |
| import backtype.storm.Config; |
| import backtype.storm.LocalCluster; |
| import backtype.storm.StormSubmitter; |
| import backtype.storm.metric.api.GlobalMetrics; |
| import backtype.storm.task.OutputCollector; |
| import backtype.storm.task.TopologyContext; |
| import backtype.storm.topology.OutputFieldsDeclarer; |
| import backtype.storm.topology.TopologyBuilder; |
| import backtype.storm.topology.base.BaseRichBolt; |
| import backtype.storm.tuple.Tuple; |
| import backtype.storm.utils.Utils; |
| |
| /** |
| * This is a basic example of a Storm topology. |
| */ |
| public final class ComponentJVMOptionsTopology { |
| |
| private ComponentJVMOptionsTopology() { |
| } |
| |
| public static void main(String[] args) throws Exception { |
| TopologyBuilder builder = new TopologyBuilder(); |
| |
| builder.setSpout("word", new TestWordSpout(), 2); |
| builder.setBolt("exclaim1", new ExclamationBolt(), 2) |
| .shuffleGrouping("word"); |
| |
| Config conf = new Config(); |
| conf.setDebug(true); |
| conf.setMaxSpoutPending(10); |
| conf.setComponentRam("word", 500 * 1024 * 1024); |
| conf.setComponentRam("exclaim1", 1024 * 1024 * 1024); |
| |
| // TOPOLOGY_WORKER_CHILDOPTS will be a global one |
| conf.put(Config.TOPOLOGY_WORKER_CHILDOPTS, "-XX:+HeapDumpOnOutOfMemoryError"); |
| |
| // For each component, both the global and if any the component one will be appended. |
| // And the component one will take precedence |
| conf.setComponentJvmOptions("word", "-XX:NewSize=300m"); |
| conf.setComponentJvmOptions("exclaim1", "-XX:NewSize=800m"); |
| |
| if (args != null && args.length > 0) { |
| conf.setNumStmgrs(1); |
| StormSubmitter.submitTopology(args[0], conf, builder.createTopology()); |
| } else { |
| LocalCluster cluster = new LocalCluster(); |
| cluster.submitTopology("test", conf, builder.createTopology()); |
| Utils.sleep(10000); |
| cluster.killTopology("test"); |
| cluster.shutdown(); |
| } |
| } |
| |
| public static class ExclamationBolt extends BaseRichBolt { |
| private static final long serialVersionUID = 2165326630789117557L; |
| private long nItems; |
| private long startTime; |
| |
| @Override |
| public void prepare( |
| Map<String, Object> conf, |
| TopologyContext context, |
| OutputCollector collector) { |
| nItems = 0; |
| startTime = System.currentTimeMillis(); |
| } |
| |
| @Override |
| public void execute(Tuple tuple) { |
| if (++nItems % 100000 == 0) { |
| long latency = System.currentTimeMillis() - startTime; |
| System.out.println("Done " + nItems + " in " + latency); |
| GlobalMetrics.incr("selected_items"); |
| } |
| } |
| |
| @Override |
| public void declareOutputFields(OutputFieldsDeclarer declarer) { |
| } |
| } |
| } |