org.apache.hudi.org.apache.hadoop.hbase.regionserver.CSLMImmutableSegment Maven / Gradle / Ivy
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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;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hadoop.hbase.util.ClassSize;
/**
* CSLMImmutableSegment is an abstract class that extends the API supported by a {@link Segment},
* and {@link ImmutableSegment}. This immutable segment is working with CellSet with
* ConcurrentSkipListMap (CSLM) delegatee.
*/
@InterfaceAudience.Private
public class CSLMImmutableSegment extends ImmutableSegment {
public static final long DEEP_OVERHEAD_CSLM =
ImmutableSegment.DEEP_OVERHEAD + ClassSize.CONCURRENT_SKIPLISTMAP;
/**------------------------------------------------------------------------
* Copy C-tor to be used when new CSLMImmutableSegment is being built from a Mutable one.
* This C-tor should be used when active MutableSegment is pushed into the compaction
* pipeline and becomes an ImmutableSegment.
*/
protected CSLMImmutableSegment(Segment segment, MemStoreSizing memstoreSizing) {
super(segment);
// update the segment metadata heap size
long indexOverhead = -MutableSegment.DEEP_OVERHEAD + DEEP_OVERHEAD_CSLM;
incMemStoreSize(0, indexOverhead, 0, 0); // CSLM is always on-heap
if (memstoreSizing != null) {
memstoreSizing.incMemStoreSize(0, indexOverhead, 0, 0);
}
}
@Override
protected long indexEntrySize() {
return ClassSize.CONCURRENT_SKIPLISTMAP_ENTRY;
}
@Override protected boolean canBeFlattened() {
return true;
}
}