Package de.uplanet.util.transaction

Class DirectDirectoryTransaction

java.lang.Object

de.uplanet.util.transaction.DirectDirectoryTransaction

All Implemented Interfaces:

ITwoPhaseIOTransaction, ITwoPhaseTransaction

public final class DirectDirectoryTransaction
extends Object

The IO operation may be done before requestCommit is called, on a call of the process method. Without a process() call the IO Operation is done by the requestCommit call.

Constructor Summary

Constructors

Constructor	Description
DirectDirectoryTransaction(File p_dirDst, File p_dirSrc)

Method Summary

Modifier and Type	Method	Description
void	commit()	Commit the transaction.
File	getBackup()
File	getDestinationDirectory()	Get the destination directory.
Throwable	getLastError()
File	getSourceDirectory()	Get the source directory.
boolean	hasBackup()
boolean	process()
boolean	requestCommit()	Request a file system transaction.
boolean	rollback()	Try to rollback the directory transaction.
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DirectDirectoryTransaction

public DirectDirectoryTransaction(File p_dirDst,
                                  File p_dirSrc)
                           throws IOException

Parameters:

p_dirDst -

p_dirSrc -

Throws:

IOException

Method Detail

requestCommit

public boolean requestCommit()

Description copied from interface: ITwoPhaseTransaction

Request a file system transaction.

When this method returns true it has sucessfully moved the source file to it's new location, and has successfully created a backup copy of the destination file, if it existed before.

Specified by:

requestCommit in interface ITwoPhaseTransaction

process

public boolean process()

getDestinationDirectory

public final File getDestinationDirectory()

Get the destination directory.

Returns:

The value p_dirDst that was passed to the contructor.

getSourceDirectory

public final File getSourceDirectory()

Get the source directory.

Returns:

The value p_dirSrc that was passed to the contructor.

hasBackup

public final boolean hasBackup()

Specified by:

hasBackup in interface ITwoPhaseIOTransaction

Returns:

true if the transaction has left a backup directory, or false otherwise (e.g. if the destination directory did not exist before the transaction).

getBackup

public File getBackup()

Specified by:

getBackup in interface ITwoPhaseIOTransaction

Returns:

The backup directory that was left by the transaction, or null if none was created (e.g. if the destination directory did not exist before the transaction).

commit

public final void commit()

Description copied from interface: ITwoPhaseTransaction

Commit the transaction.

Specified by:

commit in interface ITwoPhaseTransaction

rollback

public boolean rollback()

Try to rollback the directory transaction.

Specified by:

rollback in interface ITwoPhaseTransaction

Returns:

true if the rollback was successful, or false otherwise. In the latter case ITwoPhaseTransaction.getLastError() may give additional information about why the rollback failed, and a backup directory may exist then.

getLastError

public final Throwable getLastError()

Specified by:

getLastError in interface ITwoPhaseTransaction

Returns:

The last exception that was caugth during the transaction, or null if no error occurred;

toString

public String toString()

Overrides:

toString in class Object