Parallel service invocation
BPEL also supports parallel service invocation. In our example, we have invoked Bookstore A and Bookstore B sequentially. This way, we need to wait for the response from the first service and then for the response from the second service. If these services take longer to execute, the response times will be added together. If we invoke both services in parallel, we only need to wait for the duration of the longer-lasting call, as shown in the following screenshot:
Note
BPEL has several possibilities for parallel flows, which will be described in detail in Chapter 8, Dynamic Parallel Invocations. Here, we present the basic parallel service invocation using the <flow> activity.
To invoke services in parallel, or to perform ...
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