/**
* 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 org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.HBaseInterfaceAudience;
import org.apache.hadoop.hbase.wal.WAL.Entry;
/**
* A Filter for WAL entries before being sent over to replication. Multiple
* filters might be chained together using {@link ChainWALEntryFilter}.
*/
@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.REPLICATION)
public interface WALEntryFilter {
/**
* Applies the filter, possibly returning a different Entry instance.
* If null is returned, the entry will be skipped.
* @param entry Entry to filter
* @return a (possibly modified) Entry to use. Returning null or an entry with
* no cells will cause the entry to be skipped for replication.
*/
public Entry filter(Entry entry);
}