/**
* 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.protocol;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableFactories;
import org.apache.hadoop.io.WritableFactory;
/**
* A block with its location and NameNode meta info
* like data transfer version number and namespace id.
*/
public class LocatedBlockWithMetaInfo extends VersionedLocatedBlock {
private int namespaceid = -1; // namespace id
private int methodFingerPrint;
LocatedBlockWithMetaInfo() {
}
public LocatedBlockWithMetaInfo(Block b, DatanodeInfo[] locs, long startOffset,
int dataProtocolVersion, int namespaceid, int methodFingerPrint) {
super(b, locs, startOffset, dataProtocolVersion);
this.namespaceid = namespaceid;
this.methodFingerPrint = methodFingerPrint;
}
/**
* Get namespace id
*/
public int getNamespaceID() {
return this.namespaceid;
}
public int getMethodFingerPrint() {
return methodFingerPrint;
}
//////////////////////////////////////////////////
// Writable
//////////////////////////////////////////////////
static { // register a ctor
WritableFactories.setFactory
(LocatedBlockWithMetaInfo.class,
new WritableFactory() {
public Writable newInstance() { return new LocatedBlockWithMetaInfo(); }
});
}
public void write(DataOutput out) throws IOException {
out.writeInt(this.namespaceid);
out.writeInt(methodFingerPrint);
super.write(out);
}
public void readFields(DataInput in) throws IOException {
this.namespaceid = in.readInt();
this.methodFingerPrint = in.readInt();
super.readFields(in);
}
}