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.regionserver; 019 020import java.io.IOException; 021import java.util.Iterator; 022import org.apache.hadoop.hbase.Cell; 023import org.apache.yetus.audience.InterfaceAudience; 024 025/** 026 * The MemStoreSegmentsIterator is designed to perform one iteration over given list of segments For 027 * another iteration new instance of MemStoreSegmentsIterator needs to be created The iterator is 028 * not thread-safe and must have only one instance per MemStore in each period of time 029 */ 030@InterfaceAudience.Private 031public abstract class MemStoreSegmentsIterator implements Iterator<Cell> { 032 033 protected final ScannerContext scannerContext; 034 035 // C-tor 036 public MemStoreSegmentsIterator(int compactionKVMax) throws IOException { 037 this.scannerContext = ScannerContext.newBuilder().setBatchLimit(compactionKVMax).build(); 038 } 039 040 public abstract void close(); 041}