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 */
018 package org.apache.hadoop.fs;
019
020 import java.io.DataInput;
021 import java.io.DataOutput;
022 import java.io.IOException;
023
024 import org.apache.hadoop.classification.InterfaceAudience;
025 import org.apache.hadoop.classification.InterfaceStability;
026 import org.apache.hadoop.io.Writable;
027 import org.apache.hadoop.io.WritableFactories;
028 import org.apache.hadoop.io.WritableFactory;
029
030 /****************************************************
031 * Provides server default configuration values to clients.
032 *
033 ****************************************************/
034 @InterfaceAudience.Public
035 @InterfaceStability.Evolving
036 public class FsServerDefaults implements Writable {
037
038 static { // register a ctor
039 WritableFactories.setFactory(FsServerDefaults.class, new WritableFactory() {
040 public Writable newInstance() {
041 return new FsServerDefaults();
042 }
043 });
044 }
045
046 private long blockSize;
047 private int bytesPerChecksum;
048 private int writePacketSize;
049 private short replication;
050 private int fileBufferSize;
051
052 public FsServerDefaults() {
053 }
054
055 public FsServerDefaults(long blockSize, int bytesPerChecksum,
056 int writePacketSize, short replication, int fileBufferSize) {
057 this.blockSize = blockSize;
058 this.bytesPerChecksum = bytesPerChecksum;
059 this.writePacketSize = writePacketSize;
060 this.replication = replication;
061 this.fileBufferSize = fileBufferSize;
062 }
063
064 public long getBlockSize() {
065 return blockSize;
066 }
067
068 public int getBytesPerChecksum() {
069 return bytesPerChecksum;
070 }
071
072 public int getWritePacketSize() {
073 return writePacketSize;
074 }
075
076 public short getReplication() {
077 return replication;
078 }
079
080 public int getFileBufferSize() {
081 return fileBufferSize;
082 }
083
084 // /////////////////////////////////////////
085 // Writable
086 // /////////////////////////////////////////
087 @InterfaceAudience.Private
088 public void write(DataOutput out) throws IOException {
089 out.writeLong(blockSize);
090 out.writeInt(bytesPerChecksum);
091 out.writeInt(writePacketSize);
092 out.writeShort(replication);
093 out.writeInt(fileBufferSize);
094 }
095
096 @InterfaceAudience.Private
097 public void readFields(DataInput in) throws IOException {
098 blockSize = in.readLong();
099 bytesPerChecksum = in.readInt();
100 writePacketSize = in.readInt();
101 replication = in.readShort();
102 fileBufferSize = in.readInt();
103 }
104 }