org.apache.hadoop.hbase.master.MetricsMaster Maven / Gradle / Ivy
/**
* 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.hadoop.hbase.master;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.CompatibilitySingletonFactory;
/**
* This class is for maintaining the various master statistics
* and publishing them through the metrics interfaces.
*
* This class has a number of metrics variables that are publicly accessible;
* these variables (objects) have methods to update their values.
*/
@InterfaceStability.Evolving
@InterfaceAudience.Private
public class MetricsMaster {
private static final Log LOG = LogFactory.getLog(MetricsMaster.class);
private MetricsMasterSource masterSource;
private MetricsMasterProcSource masterProcSource;
public MetricsMaster(MetricsMasterWrapper masterWrapper) {
masterSource = CompatibilitySingletonFactory.getInstance(MetricsMasterSourceFactory.class).create(masterWrapper);
masterProcSource =
CompatibilitySingletonFactory.getInstance(MetricsMasterProcSourceFactory.class).create(masterWrapper);
}
// for unit-test usage
public MetricsMasterSource getMetricsSource() {
return masterSource;
}
public MetricsMasterProcSource getMetricsProcSource() {
return masterProcSource;
}
/**
* @param inc How much to add to requests.
*/
public void incrementRequests(final long inc) {
masterSource.incRequests(inc);
}
}