Advanced BPEL Functions using BizTalk
Listen Shape (<pick>, <onMessage>, <onAlarm>)
A Listen shape is used when you have to receive a message before proceeding further and also need to specify a timeout period until which BizTalk waits for the message. The Listen shape can have any number of branches each starting with a Receive shape or a Delay shape. Note that you can have all branches starting with a Receive shape in which case there is no timeout period. Alternatively you can have only one branch starting with a Delay shape and the rest must start with a Receive shape. The Listen shape is equivalent to the <pick>, <onMessage>, and <onAlarm>
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