Package de.businesscode.bcdui.wrs.load

Class DataLoader

java.lang.Object

de.businesscode.bcdui.wrs.load.DataLoader

public class DataLoader
extends Object

This algorithms
reads input from input options,
uses generator to interpret the options (generate SQL),
executes sql and
writes the resultSet out into the writer.

Constructor Summary

Constructors

Constructor	Description
DataLoader(IRequestOptions options, ISqlGenerator generator, IDataWriter dataWriter)	DataLoader

Method Summary

Modifier and Type	Method	Description
protected ResultSet	executeQuery(PreparedStatement statement)	Execute query generated by the generator Clients can overwrite this method to implement same logic
protected final IDataWriter	getDataWriter()
final long	getExecuteDuration()
protected final ISqlGenerator	getGenerator()
protected final IRequestOptions	getOptions()
long	getRsEndTime()
long	getRsStartTime()
long	getWriteDuration()
boolean	isEmpty()	isEmpty
protected PreparedStatement	prepareStatement(Connection connection, String sql)	Create the prepared statement Clients can overwrite this method to implement same logic
void	run()	run
protected void	writeResult(ResultSet resultSet)	Write result out using the data writer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DataLoader

public DataLoader(IRequestOptions options,
 ISqlGenerator generator,
 IDataWriter dataWriter)

DataLoader

Parameters:

options -

generator -

dataWriter -

Method Details

getOptions

protected final IRequestOptions getOptions()

Returns:

the options

getGenerator

protected final ISqlGenerator getGenerator()

Returns:

the generator

getDataWriter

protected final IDataWriter getDataWriter()

Returns:

the dataWriter

isEmpty

public boolean isEmpty()

isEmpty

Returns:

true if no query was specified from the request

getExecuteDuration

public final long getExecuteDuration()

Returns:

the sql execution executeDuration

getWriteDuration

public long getWriteDuration()

Returns:

the writeDuration

getRsStartTime

public long getRsStartTime()

Returns:

the rsStartTime

getRsEndTime

public long getRsEndTime()

Returns:

the rsEndTime

run

public void run()
         throws Exception

run

Throws:

Exception

prepareStatement

protected PreparedStatement prepareStatement(Connection connection,
 String sql)
                                      throws Exception

Create the prepared statement Clients can overwrite this method to implement same logic

Parameters:

connection -

sql -

Returns:

the statement

Throws:

Exception

executeQuery

protected ResultSet executeQuery(PreparedStatement statement)
                          throws Exception

Execute query generated by the generator Clients can overwrite this method to implement same logic

Parameters:

statement -

Returns:

the result set

Throws:

Exception

writeResult

protected void writeResult(ResultSet resultSet)
                    throws Exception

Write result out using the data writer. Clients can overwrite this method to implement same logic

Parameters:

resultSet - - data to write out. Can be null if generator was empty

Throws:

Exception