BlockMetaDataInfo.java
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上传日期:2018-01-08
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文件大小:2k
- /**
- * 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.hdfs.server.protocol;
- import java.io.*;
- import org.apache.hadoop.hdfs.protocol.Block;
- import org.apache.hadoop.io.*;
- /**
- * Meta data information for a block
- */
- public class BlockMetaDataInfo extends Block {
- static final WritableFactory FACTORY = new WritableFactory() {
- public Writable newInstance() { return new BlockMetaDataInfo(); }
- };
- static { // register a ctor
- WritableFactories.setFactory(BlockMetaDataInfo.class, FACTORY);
- }
- private long lastScanTime;
- public BlockMetaDataInfo() {}
- public BlockMetaDataInfo(Block b, long lastScanTime) {
- super(b);
- this.lastScanTime = lastScanTime;
- }
- public long getLastScanTime() {return lastScanTime;}
- /** {@inheritDoc} */
- public void write(DataOutput out) throws IOException {
- super.write(out);
- out.writeLong(lastScanTime);
- }
- /** {@inheritDoc} */
- public void readFields(DataInput in) throws IOException {
- super.readFields(in);
- lastScanTime = in.readLong();
- }
- }