001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.replication.regionserver;
019
020import java.util.OptionalLong;
021import org.apache.hadoop.fs.Path;
022import org.apache.yetus.audience.InterfaceAudience;
023
024/**
025 * Used by replication to prevent replicating unacked log entries. See
026 * https://issues.apache.org/jira/browse/HBASE-14004 for more details. WALFileLengthProvider exists
027 * because we do not want to reference WALFactory and WALProvider directly in the replication code
028 * so in the future it will be easier to decouple them. Each walProvider will have its own
029 * implementation.
030 */
031@InterfaceAudience.Private
032@FunctionalInterface
033public interface WALFileLengthProvider {
034
035  OptionalLong getLogFileSizeIfBeingWritten(Path path);
036}