| package org.apache.helix.monitoring.mbeans; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.TimeUnit; |
| import javax.management.JMException; |
| |
| import com.codahale.metrics.Histogram; |
| import com.codahale.metrics.SlidingTimeWindowArrayReservoir; |
| import org.apache.helix.model.Message; |
| import org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMBeanProvider; |
| import org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMetric; |
| import org.apache.helix.monitoring.mbeans.dynamicMBeans.HistogramDynamicMetric; |
| import org.apache.helix.monitoring.mbeans.dynamicMBeans.SimpleDynamicMetric; |
| |
| public class MessageLatencyMonitor extends DynamicMBeanProvider { |
| private static final String MBEAN_DESCRIPTION = "Helix Message Latency Monitor"; |
| private final String _sensorName; |
| private final String _domainName; |
| private final String _participantName; |
| |
| private SimpleDynamicMetric<Long> _totalMessageCount; |
| private SimpleDynamicMetric<Long> _totalMessageLatency; |
| private HistogramDynamicMetric _messageLatencyGauge; |
| |
| public MessageLatencyMonitor(String domainName, String participantName) throws JMException { |
| _domainName = domainName; |
| _participantName = participantName; |
| _sensorName = String.format("%s.%s", ParticipantMessageMonitor.PARTICIPANT_STATUS_KEY, |
| "MessageLatency"); |
| |
| _messageLatencyGauge = new HistogramDynamicMetric("MessagelatencyGauge", new Histogram( |
| new SlidingTimeWindowArrayReservoir(getResetIntervalInMs(), TimeUnit.MILLISECONDS))); |
| _totalMessageLatency = new SimpleDynamicMetric("TotalMessageLatency", 0l); |
| _totalMessageCount = new SimpleDynamicMetric("TotalMessageCount", 0l); |
| } |
| |
| @Override |
| public String getSensorName() { |
| return _sensorName; |
| } |
| |
| public void updateLatency(Message message) { |
| long latency = System.currentTimeMillis() - message.getCreateTimeStamp(); |
| _logger.info(String.format("The latency of message %s is %d ms", message.getMsgId(), latency)); |
| |
| _totalMessageCount.updateValue(_totalMessageCount.getValue() + 1); |
| _totalMessageLatency.updateValue(_totalMessageLatency.getValue() + latency); |
| _messageLatencyGauge.updateValue(latency); |
| } |
| |
| @Override |
| public MessageLatencyMonitor register() throws JMException { |
| List<DynamicMetric<?, ?>> attributeList = new ArrayList<>(); |
| attributeList.add(_totalMessageCount); |
| attributeList.add(_totalMessageLatency); |
| attributeList.add(_messageLatencyGauge); |
| doRegister(attributeList, MBEAN_DESCRIPTION, _domainName, ParticipantMessageMonitor.PARTICIPANT_KEY, |
| _participantName, "MonitorType", MessageLatencyMonitor.class.getSimpleName()); |
| |
| return this; |
| } |
| } |