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.fs;
019
020import java.io.DataInput;
021import java.io.DataOutput;
022import java.io.IOException;
023
024import org.apache.hadoop.classification.InterfaceAudience;
025import org.apache.hadoop.classification.InterfaceStability;
026import org.apache.hadoop.io.Writable;
027import org.apache.hadoop.io.WritableFactories;
028import org.apache.hadoop.io.WritableFactory;
029import org.apache.hadoop.io.WritableUtils;
030import org.apache.hadoop.util.DataChecksum;
031
032/****************************************************
033 * Provides server default configuration values to clients.
034 * 
035 ****************************************************/
036@InterfaceAudience.Public
037@InterfaceStability.Evolving
038public class FsServerDefaults implements Writable {
039
040  static { // register a ctor
041    WritableFactories.setFactory(FsServerDefaults.class, new WritableFactory() {
042      @Override
043      public Writable newInstance() {
044        return new FsServerDefaults();
045      }
046    });
047  }
048
049  private long blockSize;
050  private int bytesPerChecksum;
051  private int writePacketSize;
052  private short replication;
053  private int fileBufferSize;
054  private boolean encryptDataTransfer;
055  private long trashInterval;
056  private DataChecksum.Type checksumType;
057
058  public FsServerDefaults() {
059  }
060
061  public FsServerDefaults(long blockSize, int bytesPerChecksum,
062      int writePacketSize, short replication, int fileBufferSize,
063      boolean encryptDataTransfer, long trashInterval,
064      DataChecksum.Type checksumType) {
065    this.blockSize = blockSize;
066    this.bytesPerChecksum = bytesPerChecksum;
067    this.writePacketSize = writePacketSize;
068    this.replication = replication;
069    this.fileBufferSize = fileBufferSize;
070    this.encryptDataTransfer = encryptDataTransfer;
071    this.trashInterval = trashInterval;
072    this.checksumType = checksumType;
073  }
074
075  public long getBlockSize() {
076    return blockSize;
077  }
078
079  public int getBytesPerChecksum() {
080    return bytesPerChecksum;
081  }
082
083  public int getWritePacketSize() {
084    return writePacketSize;
085  }
086
087  public short getReplication() {
088    return replication;
089  }
090
091  public int getFileBufferSize() {
092    return fileBufferSize;
093  }
094  
095  public boolean getEncryptDataTransfer() {
096    return encryptDataTransfer;
097  }
098
099  public long getTrashInterval() {
100    return trashInterval;
101  }
102
103  public DataChecksum.Type getChecksumType() {
104    return checksumType;
105  }
106
107  // /////////////////////////////////////////
108  // Writable
109  // /////////////////////////////////////////
110  @Override
111  @InterfaceAudience.Private
112  public void write(DataOutput out) throws IOException {
113    out.writeLong(blockSize);
114    out.writeInt(bytesPerChecksum);
115    out.writeInt(writePacketSize);
116    out.writeShort(replication);
117    out.writeInt(fileBufferSize);
118    WritableUtils.writeEnum(out, checksumType);
119  }
120
121  @Override
122  @InterfaceAudience.Private
123  public void readFields(DataInput in) throws IOException {
124    blockSize = in.readLong();
125    bytesPerChecksum = in.readInt();
126    writePacketSize = in.readInt();
127    replication = in.readShort();
128    fileBufferSize = in.readInt();
129    checksumType = WritableUtils.readEnum(in, DataChecksum.Type.class);
130  }
131}