The following table is a quick guide to which kind of inter-process communication mechanism you should use in various circumstances:
Throw/catch message events
|
Throw/catch signal events
|
Send/receive tasks
| |
|---|---|---|---|
Ability to attach a boundary event to catch errors
|
No
|
No
|
Yes
|
Asynchronous
|
Either
|
Yes
|
Yes
|
Invoked process becomes a ...
|
Child
|
Child
|
Peer
|
The process you want to invoke starts with a ...
|
Catch message event or receive task that creates an instance
|
Catch signal event
|
Receive task
|
You know who the receiver is at design time
|
Yes
|
No
|
Yes
|
You want to send the 'message' to ... receivers
|
One
|
Any number
|
One
|
Failure of called process propagates to calling process*
|
