We are now prepared to extend the BookWarehousingBPEL process. The goal is to invoke the AnotherBookstoreBPEL process in addition to the BookstoreABPEL and BookstoreBBPEL processes. We will do the following:
- We will add a new
<flow>branch for the invocation of theAnotherBookstoreBPELprocess, as shown in the following screenshot:
- Before we can invoke the
AnotherBookstoreBPELprocess, we need to declare two variables,AnotherBookstoreRequestandAnotherBookstoreResponse. They should be ofAnotherBookstoreRequestMessageandAnotherBookstoreResponseMessagemessage types, respectively. - We will need to assign the values for the
AnotherBookstoreRequestvariable. For this, we will use the<assign>activity, which we will drag-and-drop from the Components palette to the<flow>branch. We will copy field-by-field the book ISSN, title, edition, and publishing year from theinputVariablevariable to the corresponding elements of theAnotherBookstoreRequestvariable, as shown in the following screenshot:
- Next, we will make the invocation of the
AnotherBookstoreBPELprocess. We will drag-and-drop the<invoke>activity to the process, connect it with theAnotheBookstoreBPELprocess (this way, we will set the partner link), and map the variables. We will use theAnotherBookstoreRequestvariable for the input andAnotherBookstoreResponsevariable for the output:
You have successfully transformed the data from the inputVariable variable to the AnotherBookstoreRequest variable and invoked the AnotherBookstoreBPEL process. The source code for this should look like the following:
With this, we have successfully invoked the AnotherBookstoreBPEL process. However, we also need to modify the <if> activity, which should now select among the three options. We will also need to deal with AnotherBookstoreResponse, which has a different structure than the responses from the other two bookstores.
It's your turn now. You should modify the <if> activity, which should now select among the three options. You should also map the AnotherBookstoreResponse to the outputVariable in case AnotherBookstore has the lowest stock quantity.
After you have successfully implemented the modified process, try to deploy it and test it.