org.apache.hudi.org.apache.hadoop.hbase.quotas.NoOpRegionSizeStore 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.quotas;
import java.util.Iterator;
import java.util.Map.Entry;
import org.apache.hadoop.hbase.client.RegionInfo;
import org.apache.yetus.audience.InterfaceAudience;
/**
* A {@link RegionSizeStore} implementation that stores nothing.
*/
@InterfaceAudience.Private
public final class NoOpRegionSizeStore implements RegionSizeStore {
private static final NoOpRegionSizeStore INSTANCE = new NoOpRegionSizeStore();
private NoOpRegionSizeStore() {}
public static NoOpRegionSizeStore getInstance() {
return INSTANCE;
}
@Override
public Iterator> iterator() {
return null;
}
@Override
public long heapSize() {
return 0;
}
@Override
public RegionSize getRegionSize(RegionInfo regionInfo) {
return null;
}
@Override
public void put(RegionInfo regionInfo, long size) {}
@Override
public void incrementRegionSize(RegionInfo regionInfo, long delta) {}
@Override
public RegionSize remove(RegionInfo regionInfo) {
return null;
}
@Override
public int size() {
return 0;
}
@Override
public boolean isEmpty() {
return true;
}
@Override
public void clear() {}
}