Posts tagged signal activity
A BPEL process can communicate with another BPEL process just like it can communicatie with any Web Service – as BPEL processes expose WebService interfaces to the world – or at least to their fellow components in the same Composite Application. When one process – the master in tis discussion – calls another one – it can have several types of interaction and dependency on that other process – we will call it the detail process for the purpose of this article:
- it is not interested at all in the detail process – its call was a one-way fire and forget
- it is interested in the response and it will wait for the response before it can continue processing (synchronous calls will always do this, asynchronous calls could have some activity going on while the detail process is churning away)
- it is interested in the fact that the detail process has reached a certain stage – but it does not actually need a response (it wants a signal but no data)
The Signal and ReceiveSignal activities are Oracle extensions to BPEL – that only work on the Oracle BPEL engine – that help us to implement the third scenario.
As part of the Invoke activity from a BPEL process to another process, we More >