Method Detail

• isForwardEnabled

  default java.lang.String isForwardEnabled​(IAppHistoryEntry entry,
                                            IClientSessionGyro clientGyro)

  Returns if the forward operation is enabled or not.

  If a null String is returned, the operation is enabled, otherwise the string is the reason why to operation is disabled. This reason is used typically for developers, logging and debugging.

  If an operation is not enabled or allowed, it will not be performed. This method can be called multiple times and should be quick and efficient.

  Override this method to handle other processing than to return true.

  If the operation requires some processing of the history entries focus, use the method IAppHistoryEntry.isForwardEnabled(IClientSessionGyro) to test if the focus operation can be performed.

  Parameters:

  entry - The history entry.

  clientGyro - The client session requesting the forward operation enabled state.

  Returns:

  Default null meaning enabled, otherwise the reason string for being disabled.

• performForward

  java.lang.String performForward​(IAppHistoryEntry entry,
                                  IClientSessionGyro clientGyro,
                                  IAppHistoryOperationCompleted completedCallback)
                           throws PropException,
                                  TXPException

  Performs the forward operation for the client session in question.

  If a null String is returned, the operation is enabled, otherwise the string is the reason why to operation is disabled. This reason is used typically for developers, logging and debugging.

  If the operation requires some processing of the history entries focus, use the method IAppHistoryEntry.setForwardFocus(IClientSessionGyro).

  NOTE 1: This method must complete a call to the callback runnable when it has completed the operation completes with or without errors.

  NOTE 2: The completedCallback function SHOULD NOT be called if an exception is thrown. It should be the last call done in the routine that performs the operation, regardless of execution thread.

  Parameters:

  entry - The history entry.

  clientGyro - The client session requesting the forward operation execution.

  completedCallback - The callback to call when operation has completed.

  Returns:

  Default null meaning enabled and the operation has begun (perhaps not completed yet), otherwise the reason string for being disabled.

  Throws:

  PropException - Property exceptions for property or focus errors or problems.

  TXPException - For transaction exceptions.