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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.
*/
package org.apache.hadoop.hbase.regionserver.throttle;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseInterfaceAudience;
import org.apache.yetus.audience.InterfaceAudience;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.hbase.regionserver.RegionServerServices;
import org.apache.hadoop.util.ReflectionUtils;
@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.CONFIG)
public final class FlushThroughputControllerFactory {
private static final Logger LOG = LoggerFactory.getLogger(FlushThroughputControllerFactory.class);
public static final String HBASE_FLUSH_THROUGHPUT_CONTROLLER_KEY =
"hbase.regionserver.flush.throughput.controller";
private static final Class
DEFAULT_FLUSH_THROUGHPUT_CONTROLLER_CLASS = NoLimitThroughputController.class;
private FlushThroughputControllerFactory() {
}
public static ThroughputController create(RegionServerServices server,
Configuration conf) {
Class clazz = getThroughputControllerClass(conf);
ThroughputController controller = ReflectionUtils.newInstance(clazz, conf);
controller.setup(server);
return controller;
}
public static Class getThroughputControllerClass(
Configuration conf) {
String className =
conf.get(HBASE_FLUSH_THROUGHPUT_CONTROLLER_KEY,
DEFAULT_FLUSH_THROUGHPUT_CONTROLLER_CLASS.getName());
try {
return Class.forName(className).asSubclass(ThroughputController.class);
} catch (Exception e) {
LOG.warn(
"Unable to load configured flush throughput controller '" + className
+ "', load default throughput controller "
+ DEFAULT_FLUSH_THROUGHPUT_CONTROLLER_CLASS.getName() + " instead", e);
return DEFAULT_FLUSH_THROUGHPUT_CONTROLLER_CLASS;
}
}
}