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