/**
* 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.replication;
import java.util.ArrayList;
import java.util.NavigableMap;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.wal.WAL.Entry;
/**
* Keeps KVs that are scoped other than local
*/
@InterfaceAudience.Private
public class ScopeWALEntryFilter implements WALEntryFilter {
@Override
public Entry filter(Entry entry) {
NavigableMap<byte[], Integer> scopes = entry.getKey().getScopes();
if (scopes == null || scopes.isEmpty()) {
return null;
}
ArrayList<Cell> cells = entry.getEdit().getCells();
int size = cells.size();
for (int i = size - 1; i >= 0; i--) {
Cell cell = cells.get(i);
// The scope will be null or empty if
// there's nothing to replicate in that WALEdit
if (!scopes.containsKey(cell.getFamily())
|| scopes.get(cell.getFamily()) == HConstants.REPLICATION_SCOPE_LOCAL) {
cells.remove(i);
}
}
if (cells.size() < size / 2) {
cells.trimToSize();
}
return entry;
}
}