Class IndirectFileCreateFileTransaction

  • All Implemented Interfaces:
    ITwoPhaseIOTransaction, ITwoPhaseTransaction

    public final class IndirectFileCreateFileTransaction
    extends Object
    The IO operation not done before commit is called by the transaction manager Transaction object for creating a new file. On rollback and commit the given source file will always deleted.
    • Constructor Detail

      • IndirectFileCreateFileTransaction

        public IndirectFileCreateFileTransaction​(File p_fileDst,
                                                 File p_fileSrc,
                                                 boolean p_bOverwriteExisting)
                                          throws IOException
        p_fileDst - The destination file.
        p_fileSrc - The file used for create (must be a temporary file, because it will always be deleted after rollback or commit).
        p_bOverwriteExisting - true if an existing file should be overwritten, or false otherwise.
        IOException - If p_fileDst or p_fileSrc is not a file.
    • Method Detail

      • rollback

        public boolean rollback()
        Try to rollback the file transaction.
        Specified by:
        rollback in interface ITwoPhaseTransaction
        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.
      • 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
      • getDestinationFile

        public final File getDestinationFile()
        Get the destination file.
        The value p_fileDst that was passed to the contructor.
      • getSourceFile

        public final File getSourceFile()
        Get the source file.
        The value p_fileSrc that was passed to the contructor.
      • hasBackup

        public final boolean hasBackup()
        Specified by:
        hasBackup in interface ITwoPhaseIOTransaction
        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
        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).
      • getLastError

        public final Throwable getLastError()
        Specified by:
        getLastError in interface ITwoPhaseTransaction
        The last exception that was caugth during the transaction, or null if no error occurred;