Databases Reference
In-Depth Information
If we look at the process that JDeveloper has created (as shown in the following
screenshot), we can see that in the center is the process itself, which contains the
activities to be carried out. At the moment, it just contains an initial activity for
receiving a request and a corresponding activity for sending a response.
Either side of the process we have a swim lane containing
Partner
Links
that
represent either the caller of our process, as is the case with the
echoprocess_client
partner links, or services that our BPEL process calls out to. At the moment this is
empty as we haven't defined any external references that we use within our BPEL
process. Notice also that we don't currently have any content between receiving the
call and replying; our process is empty and does nothing.
The
Component Palette
window (to the right of our process window in the
preceding screenshot) lists all the
BPEL Activities and Components
that we can use
within our process. To use any of these, we have to simply drag-and-drop them onto
the appropriate place within our process.
If you click on the
BPEL Services
drop-down, you also have the option of selecting
services which we use whenever we need to call out to an external system.
Getting back to our skeleton process, we can see that it consists of two activities;
receiveInput
and
replyOutput
. In addition it has two variables,
inputVariable
and
outputVariable
, which were created as part of our skeleton process.
