org.apache.hadoop.hbase.replication.TableCfWALEntryFilter Maven / Gradle / Ivy
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Main functionality for HBase
/**
* 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.List;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.wal.WAL.Entry;
import org.apache.hadoop.hbase.util.Bytes;
public class TableCfWALEntryFilter implements WALEntryFilter {
private static final Log LOG = LogFactory.getLog(TableCfWALEntryFilter.class);
private final ReplicationPeer peer;
public TableCfWALEntryFilter(ReplicationPeer peer) {
this.peer = peer;
}
@Override
public Entry filter(Entry entry) {
TableName tabName = entry.getKey().getTablename();
ArrayList cells = entry.getEdit().getCells();
Map> tableCFs = null;
try {
tableCFs = this.peer.getTableCFs();
} catch (IllegalArgumentException e) {
LOG.error("should not happen: can't get tableCFs for peer " + peer.getId() +
", degenerate as if it's not configured by keeping tableCFs==null");
}
int size = cells.size();
// return null(prevent replicating) if logKey's table isn't in this peer's
// replicable table list (empty tableCFs means all table are replicable)
if (tableCFs != null && !tableCFs.containsKey(tabName)) {
return null;
} else {
List cfs = (tableCFs == null) ? null : tableCFs.get(tabName);
for (int i = size - 1; i >= 0; i--) {
Cell cell = cells.get(i);
// ignore(remove) kv if its cf isn't in the replicable cf list
// (empty cfs means all cfs of this table are replicable)
if ((cfs != null && !cfs.contains(Bytes.toString(cell.getFamily())))) {
cells.remove(i);
}
}
}
if (cells.size() < size/2) {
cells.trimToSize();
}
return entry;
}
}
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