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new CancelableEvents()

Description

CancelableEvents is a class that allows an operation to be canceled before it is completed.

In the SuiteCommerce Extensibility API, most operations have a before and after event. The operation can be canceled before it is executed by creating a component listener that subscribes to the before event. Business logic in the listener can then throw an error or return a Deferred object in the rejected state.

For example, in CartComponent.js, the AddLine method is used to add a line to the cart. The beforeAddLine event occurs before the line is added and the afterAddLine events occurs after the line is added.

Methods

cancelableOn( event_name, handler ) → {void}

Description

Attaches an event handler to an event.

Parameters
Name Type Description
event_name String

The name of the event to which the event handler will be attached.
handler function

The event handler method that will be invoked when event_name is triggered. This function can receive optionally one parameter representing the action parameter. Besides optionally can return a Deferred to details the execution of the trigger's callback. If the returned Deferred is rejected the trigger's callback wont be called
Returns

cancelableOff( event_name, handler ) → {void}

Description

Detaches an event handler from an event.

Parameters
Name Type Description
event_name String

The name of the event from which to detach the event handler. This argument is required.
handler function

The event handler that will be removed from the list of handlers attached to the event. This argument is required.
Returns

cancelableDisable( event_name ) → {void}

Description

Disables all the event handlers attached to an event.

Parameters
Name Type Description
event_name String

The name of the event.
Returns

cancelableEnable( event_name ) → {Void}

Description

Re-enables all the event handlers attached to an event.

Parameters
Name Type Description
event_name String

The name of the event.
Returns

cancelableTrigger( event_name, ...args ) → {Deferred}

Description

Triggers an event with a set of arguments. If an event handler is rejected, the event handler callbacks will not be executed.

Parameters
Name Type Attributes Description
event_name String

The name of the event to trigger.
args params <repeatable>

One or more arguments that will be broadcast to all event handlers attached to the event.
Returns

Returns a Deferred object. Because event handlers are sometimes asynchronous, any callbacks in the event handlers will also be asynchronous.

cancelableTriggerUnsafe( event_name, ...args ) → {Deferred}

Description

Triggers an event with a set of unsanitized arguments. If an event handler is rejected, the event handler callbacks will not be executed.

Parameters
Name Type Attributes Description
event_name String

The name of the event to trigger.
args params <repeatable>

One or more arguments that will be broadcast to all event handlers attached to the event.
Returns

Returns a Deferred object. Because event handlers are sometimes asynchronous, any callbacks in the event handlers will also be asynchronous.