| /* |
| * 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.cassandra.metrics; |
| |
| import com.codahale.metrics.Gauge; |
| import com.codahale.metrics.Timer; |
| import org.apache.cassandra.db.commitlog.AbstractCommitLogService; |
| import org.apache.cassandra.db.commitlog.AbstractCommitLogSegmentManager; |
| |
| import static org.apache.cassandra.metrics.CassandraMetricsRegistry.Metrics; |
| |
| /** |
| * Metrics for commit log |
| */ |
| public class CommitLogMetrics |
| { |
| public static final MetricNameFactory factory = new DefaultNameFactory("CommitLog"); |
| |
| /** Number of completed tasks */ |
| public Gauge<Long> completedTasks; |
| /** Number of pending tasks */ |
| public Gauge<Long> pendingTasks; |
| /** Current size used by all the commit log segments */ |
| public Gauge<Long> totalCommitLogSize; |
| /** Time spent waiting for a CLS to be allocated - under normal conditions this should be zero */ |
| public final Timer waitingOnSegmentAllocation; |
| /** The time spent waiting on CL sync; for Periodic this is only occurs when the sync is lagging its sync interval */ |
| public final Timer waitingOnCommit; |
| |
| public CommitLogMetrics() |
| { |
| waitingOnSegmentAllocation = Metrics.timer(factory.createMetricName("WaitingOnSegmentAllocation")); |
| waitingOnCommit = Metrics.timer(factory.createMetricName("WaitingOnCommit")); |
| } |
| |
| public void attach(final AbstractCommitLogService service, final AbstractCommitLogSegmentManager segmentManager) |
| { |
| completedTasks = Metrics.register(factory.createMetricName("CompletedTasks"), new Gauge<Long>() |
| { |
| public Long getValue() |
| { |
| return service.getCompletedTasks(); |
| } |
| }); |
| pendingTasks = Metrics.register(factory.createMetricName("PendingTasks"), new Gauge<Long>() |
| { |
| public Long getValue() |
| { |
| return service.getPendingTasks(); |
| } |
| }); |
| totalCommitLogSize = Metrics.register(factory.createMetricName("TotalCommitLogSize"), new Gauge<Long>() |
| { |
| public Long getValue() |
| { |
| return segmentManager.onDiskSize(); |
| } |
| }); |
| } |
| } |