| /** |
| * 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.metric; |
| |
| import com.codahale.metrics.Gauge; |
| import com.codahale.metrics.jvm.GarbageCollectorMetricSet; |
| import com.codahale.metrics.jvm.MemoryUsageGaugeSet; |
| import com.codahale.metrics.jvm.ThreadStatesGaugeSet; |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.RuntimeMXBean; |
| import java.util.Map; |
| import org.apache.storm.Config; |
| import org.apache.storm.metric.api.IMetric; |
| import org.apache.storm.task.IBolt; |
| import org.apache.storm.task.OutputCollector; |
| import org.apache.storm.task.TopologyContext; |
| import org.apache.storm.tuple.Tuple; |
| import org.apache.storm.utils.ObjectReader; |
| import org.apache.storm.utils.ReflectionUtils; |
| |
| // There is one task inside one executor for each worker of the topology. |
| // TaskID is always -1, therefore you can only send-unanchored tuples to co-located SystemBolt. |
| // This bolt was conceived to export worker stats via metrics api. |
| public class SystemBolt implements IBolt { |
| private static boolean prepareWasCalled = false; |
| |
| @SuppressWarnings({ "unchecked" }) |
| @Override |
| public void prepare(final Map<String, Object> topoConf, TopologyContext context, OutputCollector collector) { |
| if (prepareWasCalled && !"local".equals(topoConf.get(Config.STORM_CLUSTER_MODE))) { |
| throw new RuntimeException("A single worker should have 1 SystemBolt instance."); |
| } |
| prepareWasCalled = true; |
| |
| context.registerMetricSet("GC", new GarbageCollectorMetricSet()); |
| context.registerMetricSet("threads", new ThreadStatesGaugeSet()); |
| context.registerMetricSet("memory", new MemoryUsageGaugeSet()); |
| |
| final RuntimeMXBean jvmRt = ManagementFactory.getRuntimeMXBean(); |
| |
| context.registerGauge("uptimeSecs", new Gauge<Long>() { |
| @Override |
| public Long getValue() { |
| return jvmRt.getUptime() / 1000L; |
| } |
| }); |
| |
| context.registerGauge("startTimeSecs", new Gauge<Long>() { |
| @Override |
| public Long getValue() { |
| return jvmRt.getStartTime() / 1000L; |
| } |
| }); |
| |
| // newWorkerEvent: 1 when a worker is first started and 0 all other times. |
| // This can be used to tell when a worker has crashed and is restarted. |
| final IMetric newWorkerEvent = new IMetric() { |
| boolean doEvent = true; |
| |
| @Override |
| public Object getValueAndReset() { |
| if (doEvent) { |
| doEvent = false; |
| return 1; |
| } else { |
| return 0; |
| } |
| } |
| }; |
| context.registerGauge("newWorkerEvent", new Gauge<Integer>() { |
| @Override |
| public Integer getValue() { |
| return (Integer) newWorkerEvent.getValueAndReset(); |
| } |
| }); |
| |
| int bucketSize = ObjectReader.getInt(topoConf.get(Config.TOPOLOGY_BUILTIN_METRICS_BUCKET_SIZE_SECS)); |
| registerMetrics(context, (Map<String, String>) topoConf.get(Config.WORKER_METRICS), bucketSize, topoConf); |
| registerMetrics(context, (Map<String, String>) topoConf.get(Config.TOPOLOGY_WORKER_METRICS), bucketSize, topoConf); |
| } |
| |
| private void registerMetrics(TopologyContext context, Map<String, String> metrics, int bucketSize, Map<String, Object> conf) { |
| if (metrics == null) { |
| return; |
| } |
| for (Map.Entry<String, String> metric : metrics.entrySet()) { |
| try { |
| context.registerMetric(metric.getKey(), (IMetric) ReflectionUtils.newInstance(metric.getValue(), conf), bucketSize); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| @Override |
| public void execute(Tuple input) { |
| throw new RuntimeException("Non-system tuples should never be sent to __system bolt."); |
| } |
| |
| @Override |
| public void cleanup() { |
| } |
| } |