scylla-jmx/src/main/java/org/apache/cassandra/metrics/CommitLogMetrics.java

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/*
* 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.
*/
/*
* Copyright 2015 Cloudius Systems
*
* Modified by Cloudius Systems
*/
package org.apache.cassandra.metrics;
import com.cloudius.urchin.api.APIClient;
import com.cloudius.urchin.metrics.APIMetrics;
import com.cloudius.urchin.metrics.DefaultNameFactory;
import com.cloudius.urchin.metrics.MetricNameFactory;
import com.yammer.metrics.core.Gauge;
import com.yammer.metrics.core.Timer;
import java.util.concurrent.TimeUnit;
/**
* Metrics for commit log
*/
public class CommitLogMetrics {
public static final MetricNameFactory factory = new DefaultNameFactory(
"CommitLog");
private APIClient c = new APIClient();
/** Number of completed tasks */
public final Gauge<Long> completedTasks;
/** Number of pending tasks */
public final Gauge<Long> pendingTasks;
/** Current size used by all the commit log segments */
public final 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() {
completedTasks = APIMetrics.newGauge(
factory.createMetricName("CompletedTasks"), new Gauge<Long>() {
public Long value() {
return c.getLongValue("/commitlog/metrics/completed_tasks");
}
});
pendingTasks = APIMetrics.newGauge(
factory.createMetricName("PendingTasks"), new Gauge<Long>() {
public Long value() {
return c.getLongValue("/commitlog/metrics/pending_tasks");
}
});
totalCommitLogSize = APIMetrics.newGauge(
factory.createMetricName("TotalCommitLogSize"),
new Gauge<Long>() {
public Long value() {
return c.getLongValue("/commitlog/metrics/total_commit_log_size");
}
});
waitingOnSegmentAllocation = APIMetrics.newTimer("/commit_log/metrics/waiting_on_segment_allocation",
factory.createMetricName("WaitingOnSegmentAllocation"),
TimeUnit.MICROSECONDS, TimeUnit.SECONDS);
waitingOnCommit = APIMetrics.newTimer("/commit_log/metrics/waiting_on_commit",
factory.createMetricName("WaitingOnCommit"),
TimeUnit.MICROSECONDS, TimeUnit.SECONDS);
}
}