*Notation
A send signal action is notated with a convex pentagon.
Signal Type
Send signal action
Figure 11.23 - Send signal notation
| Previous | UML Classes | Table of Contents | UML Packages | Next |
•
InvocationAction (from BasicActions ) on page 267
SendSignalAction is an action that creates a signal instance from its inputs, and transmits it to the target object, where
it may cause the firing of a state machine transition or the execution of an activity. The argument values are available to
the execution of associated behaviors. The requestor continues execution immediately. Any reply message is ignored and is
not transmitted to the requestor. If the input is already a signal instance, use SendObjectAction.
No additional attributes
• signal: Signal [1] The type of signal transmitted to the target object.
Issue 8188 - add subsets constraint
• target: InputPin [1] The target object to which the signal is sent. {Subsets Action::input}
[1] The number and order of argument pins must be the same as the number and order of attributes in the signal.
[2] The type, ordering, and multiplicity of an argument pin must be the same as the corresponding attribute of the signal.
Issue 8188 - replace ‘his’ with ‘this’
[1] When all the prerequisites of the action execution are satisfied, a signal instance of the type specified by signal is
generated from the argument values and this signal instance is transmitted to the identified target object. The target object
may be local or remote. The signal instance may be copied during transmission, so identity might not be preserved. The manner
of transmitting the signal object, the amount of time required to transmit it, the order in which the transmissions reach
the various target objects, and the path for reaching the target objects are undefined.
[2] When a transmission arrives at a target object, it may invoke behavior in the target object. The effect of receiving a
signal object is specified in Chapter 13, Common Behaviors. Such effects include executing activities and firing state machine
transitions.
[3] A send signal action receives no reply from the invoked behavior; any attempted reply is simply ignored, and no transmission
is performed to the requestor.
A send signal action is notated with a convex pentagon.
Signal Type
Send signal action
Figure 11.23 - Send signal notation
See extension in SendSignalAction (as specialized) on page 423.
Sends a signal to a specified target object.
Same as UML 1.5.