| /* |
| * 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.samza.zk; |
| |
| |
| import org.apache.samza.metrics.MetricsBase; |
| import org.apache.samza.metrics.Counter; |
| import org.apache.samza.metrics.Gauge; |
| import org.apache.samza.metrics.MetricsRegistry; |
| import org.apache.samza.metrics.Timer; |
| |
| |
| public class ZkJobCoordinatorMetrics extends MetricsBase { |
| |
| private final MetricsRegistry metricsRegistry; |
| |
| /** |
| * Denotes if the processor is a leader or not |
| */ |
| public final Gauge<Integer> isLeader; |
| |
| /** |
| * Number of times a barrier was created by the leader |
| */ |
| public final Counter barrierCreation; |
| |
| /** |
| * Number of times the barrier state changed |
| */ |
| public final Counter barrierStateChange; |
| |
| /** |
| * Number of times the barrier encountered an error while attaining consensus on the job model version |
| */ |
| public final Counter barrierError; |
| |
| /** |
| * Average time taken for all the processors to get the latest version of the job model after single |
| * processor change (without the occurence of a barrier timeout) |
| */ |
| public final Timer singleBarrierRebalancingTime; |
| |
| public ZkJobCoordinatorMetrics(MetricsRegistry metricsRegistry) { |
| super(metricsRegistry); |
| this.metricsRegistry = metricsRegistry; |
| this.isLeader = newGauge("is-leader", 0); |
| this.barrierCreation = newCounter("barrier-creation"); |
| this.barrierStateChange = newCounter("barrier-state-change"); |
| this.barrierError = newCounter("barrier-error"); |
| this.singleBarrierRebalancingTime = newTimer("single-barrier-rebalancing-time"); |
| } |
| |
| public MetricsRegistry getMetricsRegistry() { |
| return this.metricsRegistry; |
| } |
| |
| } |