Package de.uplanet.util.transaction

Class IndirectDeleteFileTransaction

java.lang.Object

de.uplanet.util.transaction.IndirectDeleteFileTransaction

All Implemented Interfaces:

ITwoPhaseIOTransaction, ITwoPhaseTransaction

public final class IndirectDeleteFileTransaction
extends Object

The IO operation not done before requestCommit is called.

Constructor Summary

Constructors

Constructor	Description
IndirectDeleteFileTransaction(File p_fileToDelete)
IndirectDeleteFileTransaction(File p_fileToDelete, boolean p_notFailsOnNotExisting)

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

IndirectDeleteFileTransaction

public IndirectDeleteFileTransaction(File p_fileToDelete)
                              throws IOException

Parameters:

p_fileToDelete - The file to delete

Throws:

IOException

IndirectDeleteFileTransaction

public IndirectDeleteFileTransaction(File p_fileToDelete,
                                     boolean p_notFailsOnNotExisting)
                              throws IOException

Parameters:

p_fileToDelete - The file to delete

p_notFailsOnNotExisting - On true the transaction will not fail when the file was moved or deleted before otherwise the transaction will fail.

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

getFileToDelete

public final File getFileToDelete()

Get the source file.

Returns:

The value p_fileSrc 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 file, or false otherwise (e.g. if the destination file did not exist before the transaction).

getBackup

public final File getBackup()

Specified by:

getBackup in interface ITwoPhaseIOTransaction

Returns:

The backup file that was left by the transaction, or null if none was created (e.g. if the destination file 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 file 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 file 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