| /* |
| * 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.storm.perf; |
| |
| import java.util.Map; |
| import org.apache.storm.Config; |
| import org.apache.storm.generated.StormTopology; |
| import org.apache.storm.perf.spout.ConstSpout; |
| import org.apache.storm.perf.utils.Helper; |
| import org.apache.storm.task.OutputCollector; |
| import org.apache.storm.task.TopologyContext; |
| import org.apache.storm.topology.BoltDeclarer; |
| import org.apache.storm.topology.OutputFieldsDeclarer; |
| import org.apache.storm.topology.TopologyBuilder; |
| import org.apache.storm.topology.base.BaseRichBolt; |
| import org.apache.storm.tuple.Tuple; |
| import org.apache.storm.utils.ObjectReader; |
| import org.apache.storm.utils.Utils; |
| import org.slf4j.LoggerFactory; |
| |
| |
| public class BackPressureTopo { |
| |
| private static final String SPOUT_ID = "ConstSpout"; |
| private static final String BOLT_ID = "ThrottledBolt"; |
| private static final Integer SPOUT_COUNT = 1; |
| private static final Integer BOLT_COUNT = 1; |
| private static final String SLEEP_MS = "sleep"; |
| |
| static StormTopology getTopology(Map<String, Object> conf) { |
| |
| Long sleepMs = ObjectReader.getLong(conf.get(SLEEP_MS)); |
| // 1 - Setup Spout -------- |
| ConstSpout spout = new ConstSpout("some data").withOutputFields("string"); |
| |
| // 2 - Setup DevNull Bolt -------- |
| ThrottledBolt bolt = new ThrottledBolt(sleepMs); |
| |
| |
| // 3 - Setup Topology -------- |
| TopologyBuilder builder = new TopologyBuilder(); |
| |
| builder.setSpout(SPOUT_ID, spout, Helper.getInt(conf, SPOUT_COUNT, 1)); |
| BoltDeclarer bd = builder.setBolt(BOLT_ID, bolt, Helper.getInt(conf, BOLT_COUNT, 1)); |
| |
| bd.localOrShuffleGrouping(SPOUT_ID); |
| return builder.createTopology(); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| int runTime = -1; |
| Config topoConf = new Config(); |
| topoConf.put(Config.TOPOLOGY_SPOUT_RECVQ_SKIPS, 1); |
| topoConf.putAll(Utils.readCommandLineOpts()); |
| if (args.length > 0) { |
| long sleepMs = Integer.parseInt(args[0]); |
| topoConf.put(SLEEP_MS, sleepMs); |
| } |
| if (args.length > 1) { |
| runTime = Integer.parseInt(args[1]); |
| } |
| if (args.length > 2) { |
| System.err.println("args: boltSleepMs [runDurationSec] "); |
| return; |
| } |
| // Submit topology to storm cluster |
| Helper.runOnClusterAndPrintMetrics(runTime, "BackPressureTopo", topoConf, getTopology(topoConf)); |
| } |
| |
| private static class ThrottledBolt extends BaseRichBolt { |
| private static final org.slf4j.Logger LOG = LoggerFactory.getLogger(ThrottledBolt.class); |
| private OutputCollector collector; |
| private long sleepMs; |
| |
| ThrottledBolt(Long sleepMs) { |
| this.sleepMs = sleepMs; |
| } |
| |
| @Override |
| public void prepare(Map<String, Object> topoConf, TopologyContext context, OutputCollector collector) { |
| this.collector = collector; |
| } |
| |
| @Override |
| public void execute(Tuple tuple) { |
| collector.ack(tuple); |
| LOG.debug("Sleeping"); |
| try { |
| Thread.sleep(sleepMs); |
| } catch (InterruptedException e) { |
| //.. ignore |
| } |
| } |
| |
| @Override |
| public void declareOutputFields(OutputFieldsDeclarer declarer) { |
| } |
| } |
| } |