| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.google.common.base.Predicate; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Lists; |
| import org.apache.storm.Config; |
| import org.apache.storm.metric.api.IMetricsConsumer; |
| import org.apache.storm.metric.util.DataPointExpander; |
| 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; |
| |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.LinkedBlockingDeque; |
| |
| public class MetricsConsumerBolt implements IBolt { |
| public static final Logger LOG = LoggerFactory.getLogger(MetricsConsumerBolt.class); |
| |
| IMetricsConsumer _metricsConsumer; |
| String _consumerClassName; |
| OutputCollector _collector; |
| Object _registrationArgument; |
| private final int _maxRetainMetricTuples; |
| private Predicate<IMetricsConsumer.DataPoint> _filterPredicate; |
| private final DataPointExpander _expander; |
| |
| private final BlockingQueue<MetricsTask> _taskQueue; |
| private Thread _taskExecuteThread; |
| private volatile boolean _running = true; |
| |
| public MetricsConsumerBolt(String consumerClassName, Object registrationArgument, int maxRetainMetricTuples, |
| Predicate<IMetricsConsumer.DataPoint> filterPredicate, DataPointExpander expander) { |
| _consumerClassName = consumerClassName; |
| _registrationArgument = registrationArgument; |
| _maxRetainMetricTuples = maxRetainMetricTuples; |
| _filterPredicate = filterPredicate; |
| _expander = expander; |
| |
| if (_maxRetainMetricTuples > 0) { |
| _taskQueue = new LinkedBlockingDeque<>(_maxRetainMetricTuples); |
| } else { |
| _taskQueue = new LinkedBlockingDeque<>(); |
| } |
| } |
| |
| @Override |
| public void prepare(Map stormConf, 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(stormConf, _registrationArgument, context, collector); |
| _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); |
| } |
| } |
| } |
| } |
| |
| } |