/**
* 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.regionserver;
/**
* Factory to create MetricsRegionServerSource when given a MetricsRegionServerWrapper
*/
public class MetricsRegionServerSourceFactoryImpl implements MetricsRegionServerSourceFactory {
private static enum FactoryStorage {
INSTANCE;
private MetricsRegionServerSource serverSource;
private MetricsRegionAggregateSourceImpl aggImpl;
}
private synchronized MetricsRegionAggregateSourceImpl getAggregate() {
if (FactoryStorage.INSTANCE.aggImpl == null) {
FactoryStorage.INSTANCE.aggImpl = new MetricsRegionAggregateSourceImpl();
}
return FactoryStorage.INSTANCE.aggImpl;
}
@Override
public synchronized MetricsRegionServerSource createServer(MetricsRegionServerWrapper regionServerWrapper) {
if (FactoryStorage.INSTANCE.serverSource == null) {
FactoryStorage.INSTANCE.serverSource = new MetricsRegionServerSourceImpl(
regionServerWrapper);
}
return FactoryStorage.INSTANCE.serverSource;
}
@Override
public MetricsRegionSource createRegion(MetricsRegionWrapper wrapper) {
return new MetricsRegionSourceImpl(wrapper, getAggregate());
}
}