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A TDH_SOCKET Client For Java
There is a newer version: 0.4.1
/*
 * Copyright(C) 2011-2012 Alibaba Group Holding Limited
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  Authors:
 *    wentong 
 */

package com.taobao.tdhs.client.packet;

import com.taobao.tdhs.client.common.TDHSCommon;
import com.taobao.tdhs.client.response.TDHSResponseEnum;
import com.taobao.tdhs.client.util.ByteOrderUtil;
import com.taobao.tdhs.client.util.ConvertUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author 文通
 * @since 11-10-31 下午3:57
 */
public class BasePacket {

    private Logger logger = LoggerFactory.getLogger(this.getClass());

    public final static int TDHS_MAGIC_CODE = 0xFFFFFFFF;

    public final static int TDHS_MAGIC_CODE_SIZE = 4;

    public final static int TDH_SOCKET_COMAND_LENGTH = 4;

    public final static int TDH_SOCKET_ID_LENGTH = 4;

    public final static int TDH_SOCKET_REVERSE_LENGTH = 4;

    public final static int TDH_SOCKET_SIZE_LENGTH = 4;

    public final static int TDH_SOCKET_HEADER_LENGTH =
            TDHS_MAGIC_CODE_SIZE + TDH_SOCKET_COMAND_LENGTH + TDH_SOCKET_ID_LENGTH + TDH_SOCKET_REVERSE_LENGTH +
                    TDH_SOCKET_SIZE_LENGTH;

    private TDHSCommon.RequestType commandIdOrResponseCode;

    private TDHSResponseEnum.IClientStatus clientStatus;

    private long seqId;

    private long reserved;

    private byte data[];


    public BasePacket(TDHSCommon.RequestType commandIdOrResponseCode, long seqId, byte[] data) {
        this.commandIdOrResponseCode = commandIdOrResponseCode;
        this.seqId = seqId;
        this.reserved = 0;
        this.data = data;
    }

    public BasePacket(TDHSCommon.RequestType commandIdOrResponseCode, long seqId, long reserved, byte[] data) {
        this.commandIdOrResponseCode = commandIdOrResponseCode;
        this.seqId = seqId;
        this.reserved = reserved;
        this.data = data;
    }


    public BasePacket(TDHSResponseEnum.IClientStatus clientStatus, long seqId, byte[] data) {
        this.clientStatus = clientStatus;
        this.seqId = seqId;
        this.data = data;
    }

    public BasePacket(TDHSResponseEnum.IClientStatus clientStatus, long seqId, long reserved, byte[] data) {
        this.clientStatus = clientStatus;
        this.seqId = seqId;
        this.data = data;
        this.reserved = reserved;
    }

    public TDHSCommon.RequestType getCommandIdOrResponseCode() {
        return commandIdOrResponseCode;
    }

    public void setCommandIdOrResponseCode(TDHSCommon.RequestType commandIdOrResponseCode) {
        this.commandIdOrResponseCode = commandIdOrResponseCode;
    }


    public TDHSResponseEnum.IClientStatus getClientStatus() {
        return clientStatus;
    }

    public void setClientStatus(TDHSResponseEnum.IClientStatus clientStatus) {
        this.clientStatus = clientStatus;
    }

    public long getSeqId() {
        return seqId;
    }

    public void setSeqId(long seqId) {
        this.seqId = seqId;
    }

    public long getBatchNumber() {
        return reserved;
    }

    public byte[] getData() {
        return data;
    }

    public void setData(byte[] data) {
        this.data = data;
    }

    public byte[] toByteArray() {
        byte result[] = new byte[TDH_SOCKET_HEADER_LENGTH + data.length];
        int i = 0;
        //write magic code
        long mcode = TDHS_MAGIC_CODE;
        ByteOrderUtil.writeIntToNet(result, i, mcode);
        i += 4;
        //write request code
        long rcode = commandIdOrResponseCode.getValue();
        ByteOrderUtil.writeIntToNet(result, i, rcode);
        i += 4;
        //write  seq_id
        long tempId = seqId;
        ByteOrderUtil.writeIntToNet(result, i, tempId);
        i += 4;

        //write batch_number
        long tempBatch = reserved;
        ByteOrderUtil.writeIntToNet(result, i, tempBatch);
        i += 4;

        //write length
        long len = data.length;
        ByteOrderUtil.writeIntToNet(result, i, len);
        i += 4;

        //write data
        for (; i < TDH_SOCKET_HEADER_LENGTH + data.length; i++) {
            result[i] = data[i - TDH_SOCKET_HEADER_LENGTH];
        }

        if (logger.isDebugEnabled()) {
            StringBuilder sb = new StringBuilder("Request hex:[");
            for (byte b : result) {
                sb.append(ConvertUtil.toHex(b));
                sb.append(" ");
            }
            sb.append("]");
            logger.debug(sb.toString());
        }

        return result;
    }
}