org.apache.hadoop.fs.FsServerDefaults.java Source code

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Here is the source code for org.apache.hadoop.fs.FsServerDefaults.java

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/**
 * 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.fs;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.io.WritableFactories;
import org.apache.hadoop.io.WritableFactory;
import org.apache.hadoop.io.WritableUtils;
import org.apache.hadoop.util.DataChecksum;

/****************************************************
 * Provides server default configuration values to clients.
 * 
 ****************************************************/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public class FsServerDefaults implements Writable {

    static { // register a ctor
        WritableFactories.setFactory(FsServerDefaults.class, new WritableFactory() {
            @Override
            public Writable newInstance() {
                return new FsServerDefaults();
            }
        });
    }

    private long blockSize;
    private int bytesPerChecksum;
    private int writePacketSize;
    private short replication;
    private int fileBufferSize;
    private boolean encryptDataTransfer;
    private long trashInterval;
    private DataChecksum.Type checksumType;
    private String keyProviderUri;
    private byte storagepolicyId;

    public FsServerDefaults() {
    }

    public FsServerDefaults(long blockSize, int bytesPerChecksum, int writePacketSize, short replication,
            int fileBufferSize, boolean encryptDataTransfer, long trashInterval, DataChecksum.Type checksumType) {
        this(blockSize, bytesPerChecksum, writePacketSize, replication, fileBufferSize, encryptDataTransfer,
                trashInterval, checksumType, null, (byte) 0);
    }

    public FsServerDefaults(long blockSize, int bytesPerChecksum, int writePacketSize, short replication,
            int fileBufferSize, boolean encryptDataTransfer, long trashInterval, DataChecksum.Type checksumType,
            String keyProviderUri) {
        this(blockSize, bytesPerChecksum, writePacketSize, replication, fileBufferSize, encryptDataTransfer,
                trashInterval, checksumType, keyProviderUri, (byte) 0);
    }

    public FsServerDefaults(long blockSize, int bytesPerChecksum, int writePacketSize, short replication,
            int fileBufferSize, boolean encryptDataTransfer, long trashInterval, DataChecksum.Type checksumType,
            String keyProviderUri, byte storagepolicy) {
        this.blockSize = blockSize;
        this.bytesPerChecksum = bytesPerChecksum;
        this.writePacketSize = writePacketSize;
        this.replication = replication;
        this.fileBufferSize = fileBufferSize;
        this.encryptDataTransfer = encryptDataTransfer;
        this.trashInterval = trashInterval;
        this.checksumType = checksumType;
        this.keyProviderUri = keyProviderUri;
        this.storagepolicyId = storagepolicy;
    }

    public long getBlockSize() {
        return blockSize;
    }

    public int getBytesPerChecksum() {
        return bytesPerChecksum;
    }

    public int getWritePacketSize() {
        return writePacketSize;
    }

    public short getReplication() {
        return replication;
    }

    public int getFileBufferSize() {
        return fileBufferSize;
    }

    public boolean getEncryptDataTransfer() {
        return encryptDataTransfer;
    }

    public long getTrashInterval() {
        return trashInterval;
    }

    public DataChecksum.Type getChecksumType() {
        return checksumType;
    }

    /* null means old style namenode.
     * "" (empty string) means namenode is upgraded but EZ is not supported.
     * some string means that value is the key provider.
     */
    public String getKeyProviderUri() {
        return keyProviderUri;
    }

    public byte getDefaultStoragePolicyId() {
        return storagepolicyId;
    }

    // /////////////////////////////////////////
    // Writable
    // /////////////////////////////////////////
    @Override
    @InterfaceAudience.Private
    public void write(DataOutput out) throws IOException {
        out.writeLong(blockSize);
        out.writeInt(bytesPerChecksum);
        out.writeInt(writePacketSize);
        out.writeShort(replication);
        out.writeInt(fileBufferSize);
        WritableUtils.writeEnum(out, checksumType);
        out.writeByte(storagepolicyId);
    }

    @Override
    @InterfaceAudience.Private
    public void readFields(DataInput in) throws IOException {
        blockSize = in.readLong();
        bytesPerChecksum = in.readInt();
        writePacketSize = in.readInt();
        replication = in.readShort();
        fileBufferSize = in.readInt();
        checksumType = WritableUtils.readEnum(in, DataChecksum.Type.class);
        storagepolicyId = in.readByte();
    }
}