| /** |
| * 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 java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.LinkedBlockingDeque; |
| import org.apache.storm.Config; |
| import org.apache.storm.metric.api.IMetricsConsumer; |
| import org.apache.storm.metric.util.DataPointExpander; |
| import org.apache.storm.shade.com.google.common.base.Predicate; |
| import org.apache.storm.shade.com.google.common.collect.Iterables; |
| import org.apache.storm.shade.com.google.common.collect.Lists; |
| 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.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class MetricsConsumerBolt implements IBolt { |
| public static final Logger LOG = LoggerFactory.getLogger(MetricsConsumerBolt.class); |
| private final int maxRetainMetricTuples; |
| private final Predicate<IMetricsConsumer.DataPoint> filterPredicate; |
| private final DataPointExpander expander; |
| private final BlockingQueue<MetricsTask> taskQueue; |
| IMetricsConsumer metricsConsumer; |
| String consumerClassName; |
| OutputCollector collector; |
| Object registrationArgument; |
| private Thread taskExecuteThread; |
| private volatile boolean running = true; |
| |
| public MetricsConsumerBolt(String consumerClassName, Object registrationArgument, int maxRetainMetricTuples, |
| Predicate<IMetricsConsumer.DataPoint> filterPredicate, DataPointExpander expander) { |
| |
| this.consumerClassName = consumerClassName; |
| this.registrationArgument = registrationArgument; |
| this.maxRetainMetricTuples = maxRetainMetricTuples; |
| this.filterPredicate = filterPredicate; |
| this.expander = expander; |
| |
| if (this.maxRetainMetricTuples > 0) { |
| taskQueue = new LinkedBlockingDeque<>(this.maxRetainMetricTuples); |
| } else { |
| taskQueue = new LinkedBlockingDeque<>(); |
| } |
| } |
| |
| @Override |
| public void prepare(Map<String, Object> topoConf, TopologyContext context, OutputCollector collector) { |
| try { |
| metricsConsumer = (IMetricsConsumer) Class.forName(consumerClassName).newInstance(); |
| } catch (Exception e) { |
| throw new RuntimeException("Could not instantiate a class listed in config under section " |
| + Config.TOPOLOGY_METRICS_CONSUMER_REGISTER |
| + " with fully qualified name " |
| + consumerClassName, |
| e); |
| } |
| metricsConsumer.prepare(topoConf, registrationArgument, context, collector); |
| this.collector = collector; |
| taskExecuteThread = new Thread(new MetricsHandlerRunnable()); |
| taskExecuteThread.setDaemon(true); |
| taskExecuteThread.start(); |
| } |
| |
| @Override |
| public void execute(Tuple input) { |
| IMetricsConsumer.TaskInfo taskInfo = (IMetricsConsumer.TaskInfo) input.getValue(0); |
| Collection<IMetricsConsumer.DataPoint> dataPoints = (Collection) input.getValue(1); |
| Collection<IMetricsConsumer.DataPoint> expandedDataPoints = expander.expandDataPoints(dataPoints); |
| List<IMetricsConsumer.DataPoint> filteredDataPoints = getFilteredDataPoints(expandedDataPoints); |
| MetricsTask metricsTask = new MetricsTask(taskInfo, filteredDataPoints); |
| |
| while (!taskQueue.offer(metricsTask)) { |
| taskQueue.poll(); |
| } |
| |
| collector.ack(input); |
| } |
| |
| private List<IMetricsConsumer.DataPoint> getFilteredDataPoints(Collection<IMetricsConsumer.DataPoint> dataPoints) { |
| return Lists.newArrayList(Iterables.filter(dataPoints, filterPredicate)); |
| } |
| |
| @Override |
| public void cleanup() { |
| running = false; |
| metricsConsumer.cleanup(); |
| taskExecuteThread.interrupt(); |
| } |
| |
| static class MetricsTask { |
| private IMetricsConsumer.TaskInfo taskInfo; |
| private Collection<IMetricsConsumer.DataPoint> dataPoints; |
| |
| public MetricsTask(IMetricsConsumer.TaskInfo taskInfo, Collection<IMetricsConsumer.DataPoint> dataPoints) { |
| this.taskInfo = taskInfo; |
| this.dataPoints = dataPoints; |
| } |
| |
| public IMetricsConsumer.TaskInfo getTaskInfo() { |
| return taskInfo; |
| } |
| |
| public Collection<IMetricsConsumer.DataPoint> getDataPoints() { |
| return dataPoints; |
| } |
| } |
| |
| class MetricsHandlerRunnable implements Runnable { |
| |
| @Override |
| public void run() { |
| while (running) { |
| try { |
| MetricsTask task = taskQueue.take(); |
| metricsConsumer.handleDataPoints(task.getTaskInfo(), task.getDataPoints()); |
| } catch (InterruptedException e) { |
| break; |
| } catch (Throwable t) { |
| LOG.error("Exception occurred during handle metrics", t); |
| } |
| } |
| } |
| } |
| |
| } |