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A TDH_SOCKET Client For Java
/*
* 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.response;
import com.taobao.tdhs.client.common.IMySQLHandlerErrorCodes;
import com.taobao.tdhs.client.common.MySQLHandlerErrorCodes;
import com.taobao.tdhs.client.exception.TDHSException;
import com.taobao.tdhs.client.util.ByteOrderUtil;
import com.taobao.tdhs.client.util.ConvertUtil;
import org.apache.commons.lang.StringUtils;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
/**
* @author 文通
* @since 11-11-1 上午11:16
*/
public class TDHSResponse {
private TDHSResponseEnum.IClientStatus status;
private TDHSResponseEnum.IErrorCode errorCode;
private int dbErrorCode;
private int fieldNumber;
private List fieldTypes;
private List> fieldData;
private List> fieldOriData;
private byte data[];
private String charsetName;
private boolean isParsed = false;
private TDHSMetaData metaData;
/**
* Constructor TDHSResponse creates a new TDHSResponse instance.
*
* @param status of type ClientStatus ,client status from sever-side
* @param metaData of type TDHSMetaData ,meta data from client
* @param data of type byte[] ,data from server-side need to parse
* @param charsetName of type String ,charest for decoding
*/
public TDHSResponse(TDHSResponseEnum.IClientStatus status, TDHSMetaData metaData, byte[] data,
String charsetName) {
this.status = status;
this.metaData = metaData;
this.data = data;
if (StringUtils.isNotBlank(charsetName)) {
this.charsetName = charsetName;
}
}
/**
* parse the data received from server
*
* @throws TDHSException when has unknow response code
*/
private synchronized void parse() throws TDHSException {
if (isParsed) {
return;
}
if (400 <= status.getStatus() && 600 > status.getStatus()) {
parseFailed(this.data);
} else if (TDHSResponseEnum.ClientStatus.OK.equals(status)) {
parseData(this.data);
} else {
throw new TDHSException("unknown response code!");
}
this.data = null;
isParsed = true;
}
/**
* parse the data if the client status is not successed
*
* @param data of type byte[] ,data from server-side need to parse
*/
private void parseFailed(final byte data[]) {
int code = (int) ByteOrderUtil.getUnsignInt(data, 0);
if (status == TDHSResponseEnum.ClientStatus.DB_ERROR) {
dbErrorCode = code;
} else {
errorCode = TDHSResponseEnum.ErrorCode.valueOf(code);
}
}
/**
* parse the data if the client status is successed
*
* @param data of type byte[] ,data from server-side need to parse
*/
private void parseData(final byte data[]) {
int len = data.length;
int pos = 0;
fieldOriData = new ArrayList>();
//read field number
fieldNumber = (int) ByteOrderUtil.getUnsignInt(data, pos);
pos += 4;
fieldTypes = new ArrayList(fieldNumber);
for (int i = 0; i < fieldNumber; i++) {
fieldTypes.add(TDHSResponseEnum.FieldType.valueOf(data[pos] & 0xFF));
pos++;
}
while (pos < len) {
List record = new ArrayList(fieldNumber);
for (int i = 0; i < fieldNumber; i++) {
int fieldLength = (int) ByteOrderUtil.getUnsignInt(data, pos);
pos += 4;
if (fieldLength > 0) {
byte f[] = new byte[fieldLength];
System.arraycopy(data, pos, f, 0, fieldLength);
record.add(f);
pos += fieldLength;
} else {
record.add(new byte[0]);
}
}
fieldOriData.add(record);
}
}
/**
* Method parseFieldData ...
*
* @throws TDHSException when
*/
private void parseFieldData() throws TDHSException {
parse();
fieldData = new ArrayList>();
if (fieldOriData != null && !fieldOriData.isEmpty()) {
try {
for (List record : fieldOriData) {
if (record != null) {
List strRecord = new ArrayList(record.size());
for (byte[] f : record) {
strRecord.add(ConvertUtil.getStringFromByte(f, this.charsetName));
}
fieldData.add(strRecord);
} else {
fieldData.add(null);
}
}
} catch (UnsupportedEncodingException e) {
throw new TDHSException(e);
}
}
}
/**
* Method getCharsetName returns the charsetName of this TDHSResponse object.
*
* @return the charsetName (type String) of this TDHSResponse object.
*/
public String getCharsetName() {
return charsetName;
}
/**
* Method setCharsetName sets the charsetName of this TDHSResponse object.
*
* @param charsetName the charsetName of this TDHSResponse object.
*/
public void setCharsetName(String charsetName) {
if (StringUtils.isNotBlank(charsetName)) {
this.charsetName = charsetName;
}
}
/**
* Method getStatus returns the status of this TDHSResponse object.
*
* @return the status (type ClientStatus) of this TDHSResponse object.
*/
public TDHSResponseEnum.IClientStatus getStatus() {
return status;
}
/**
* Method getErrorCode returns the errorCode of this TDHSResponse object.
*
* @return the errorCode (type ErrorCode) of this TDHSResponse object.
*
* @throws TDHSException when
*/
public TDHSResponseEnum.IErrorCode getErrorCode() throws TDHSException {
parse();
return errorCode;
}
/**
* Method getFieldNumber returns the fieldNumber of this TDHSResponse object.
*
* @return the fieldNumber (type int) of this TDHSResponse object.
*
* @throws TDHSException when
*/
public int getFieldNumber() throws TDHSException {
parse();
return fieldNumber;
}
/**
* Method getFieldTypes returns the fieldTypes of this TDHSResponse object.
*
* @return the fieldTypes (type List) of this TDHSResponse object.
*
* @throws TDHSException when
*/
public List getFieldTypes() throws TDHSException {
parse();
return fieldTypes;
}
/**
* Method getFieldData returns the fieldData of this TDHSResponse object.
*
* @return the fieldData (type List>) of this TDHSResponse object.
*
* @throws TDHSException when
*/
public List> getFieldData() throws TDHSException {
if (fieldData != null) {
return fieldData;
}
parseFieldData();
return fieldData;
}
/**
* Method getFieldOriData returns the fieldOriData of this TDHSResponse object.
*
* @return the fieldOriData (type List>) of this TDHSResponse object.
*
* @throws TDHSException when
*/
public List> getFieldOriData() throws TDHSException {
parse();
return fieldOriData;
}
/**
* Method getDbErrorCode returns the dbErrorCode of this TDHSResponse object.
*
* @return the dbErrorCode (type int) of this TDHSResponse object.
*
* @throws TDHSException when
*/
public int getDbErrorCode() throws TDHSException {
parse();
return dbErrorCode;
}
/**
* Method getMySQLHandlerErrorCode returns the mySQLHandlerErrorCode of this TDHSResponse object.
*
* @return the mySQLHandlerErrorCode (type IMySQLHandlerErrorCodes) of this TDHSResponse object.
*
* @throws TDHSException when
*/
public IMySQLHandlerErrorCodes getMySQLHandlerErrorCode() throws TDHSException {
return MySQLHandlerErrorCodes.valueOf(getDbErrorCode());
}
/**
* Method getFieldNames returns the fieldNames of this TDHSResponse object.
*
* @return the fieldNames (type List) of this TDHSResponse object.
*/
public List getFieldNames() {
return metaData.getFieldNames();
}
/**
* Method getResultSet returns the resultSet of this TDHSResponse object.
*
* @return the resultSet (type ResultSet) of this TDHSResponse object.
*
* @throws TDHSException when
*/
public ResultSet getResultSet() throws TDHSException {
if (TDHSResponseEnum.ClientStatus.OK.equals(status)) {
return new TDHSResultSet(getFieldNames(), metaData, getFieldTypes(), getFieldOriData(), charsetName);
}
return null;
}
/**
* Method getResultSet ...
*
* @param alias of type List
*
* @return ResultSet
*
* @throws TDHSException when
*/
public ResultSet getResultSet(List alias) throws TDHSException {
if (TDHSResponseEnum.ClientStatus.OK.equals(status)) {
if (alias == null || alias.size() != getFieldNames().size()) {
throw new TDHSException("alias is wrong! alias:[" + alias + "] fieldNames:[" + getFieldNames() + "]");
}
return new TDHSResultSet(alias, metaData, getFieldTypes(), getFieldOriData(), charsetName);
}
return null;
}
/**
* Method toString ...
*
* @return String
*/
@Override
public String toString() {
try {
return "TDHSResponse{" +
"status=" + getStatus() +
", errorCode=" + getErrorCode() +
", dbErrorCode=" + getDbErrorCode() +
", MySQLHandlerErrorCode=" + getMySQLHandlerErrorCode() +
", fieldNumber=" + getFieldNumber() +
", fieldTypes=" + getFieldTypes() +
", fieldData=" + getFieldData() +
'}';
} catch (TDHSException e) {
PrintWriter pw = new PrintWriter(new StringWriter());
e.printStackTrace(pw);
return "TDHSResponse parse failed!\n" + pw.toString();
}
}
/**
* Method getErrorMessage returns the errorMessage of this TDHSResponse object.
*
* @return the errorMessage (type String) of this TDHSResponse object.
*/
public String getErrorMessage() {
try {
return "status=" + getStatus() +
", errorCode=" + getErrorCode() +
", dbErrorCode=" + getDbErrorCode() +
", MySQLHandlerErrorCode=" + getMySQLHandlerErrorCode();
} catch (TDHSException e) {
PrintWriter pw = new PrintWriter(new StringWriter());
e.printStackTrace(pw);
return "TDHSResponse parse failed!\n" + pw.toString();
}
}
}
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