Package com.evolveum.midpoint.model.api.hooks

Interface ChangeHook

public interface ChangeHook

TODO This applies to all changes, therefore it will "hook" into addObject, modifyObject and also deleteObject.

Author:

semancik

Method Summary

Modifier and Type	Method	Description
default int	getPriority()
<O extends ObjectType> HookOperationMode	invoke(ModelContext<O> context, Task task, OperationResult result)	Generic method to be implemented by the hook.
void	invokeOnException(ModelContext context, Throwable throwable, Task task, OperationResult result)	This method is invoked by the clockwork when an exception occurs.
default void	invokePreview(ModelContext<? extends ObjectType> context, Task task, OperationResult result)	Invokes the hook in "preview mode".

Method Detail

invoke

<O extends ObjectType> HookOperationMode invoke(@NotNull
                                                ModelContext<O> context,
                                                @NotNull
                                                Task task,
                                                @NotNull
                                                OperationResult result)
                                         throws PolicyViolationException

Generic method to be implemented by the hook. It is invoked by the Model Clockwork at these occasions: - after PRIMARY state has been entered, - after SECONDARY state has been entered, and - after each of secondary-state waves has been executed (i.e. with the state of SECONDARY for all except the last one, will have state set to FINAL). TODO: what about EXECUTION and POSTEXECUTION states?

Returns:

- FOREGROUND, if the processing of model operation should continue on the foreground - BACKGROUND, if the hook switched further processing into background (and, therefore, current execution of model operation should end immediately, in the hope it will eventually be resumed later) - ERROR, if the hook encountered an error which prevents model operation from continuing (this case is currently not defined very well)

Throws:

PolicyViolationException

invokeOnException

void invokeOnException(@NotNull
                       ModelContext context,
                       @NotNull
                       Throwable throwable,
                       @NotNull
                       Task task,
                       @NotNull
                       OperationResult result)

This method is invoked by the clockwork when an exception occurs. It is intended e.g. to implement a notification to the user.

Parameters:

context - actual model context at the point of processing the exception

throwable - the exception itself

task - actual task, in context of which the operation was carried out

result - actual operation result - the handler should create a subresult here for its operation This method has no return value, as it is not expected that the processing would continue in the background. (This could change in the future.)

getPriority

default int getPriority()

invokePreview

default void invokePreview(@NotNull
                           ModelContext<? extends ObjectType> context,
                           Task task,
                           OperationResult result)

Invokes the hook in "preview mode". It is expected that hook will set its output into "hookPreviewResultsMap" in the model context. Hooks can decide whether to do anything based on partial processing options. The defaults are expected to be different from defaults during normal processing, e.g. they might be set to "skip". If the caller wants preview processing by a particular hook, it might enable it using partial processing option set to "process".