Thursday, 2 August 2012

Convoy in BizTalk Orchestration

  Convoys are used when you receive related messages from diffirent sources or system and in dirrent order and on different time interval. Using convoys you can start the orchestration process and keep receiving the correlated messages either in parallel or sequentially. Thus there are two kind of convoys are possible.

1- Sequential - When you need to receive messages in predefined order then you need to use Sequential convoy.
2- Parallel - When you can receive the related messages in any order then you need to use parallel convoy.
How they are implemented in BizTalk : You achieve these convoy implementation in Biztalk using BizTalk orchestration. For sequential convoy you need to implement receive in a line and using correlation you need to correlate the next incoming message. For parallel convoy you need to use parallel shape and implement as many receive shapes as required. Again you will relate these messages using correlation.

        Sequential Convoy

In sequential convoy all the types of messages are received in an ordered sequence. The first receive shape initializes the correlation set while the other receive shapes follow the correlation set. You can have the first receive shape’s activate property to true and set the initialize correlation property. While the other receive shapes will have the follow correlation set property set and activate property false.

Parallel Convoy

In the parallel convoy the messages arriving are not in a sequence and their sequence does not matter but the processing should be started when all the three messages are received. Configuring the parallel convoy is straight forward. Just drag the parallel shape and add the receive shapes in the parallel shape branches. If the parallel shape is the first shape in the orchestration then each parallel receive shape must have activate property to true and initialize the correlation set otherwise follow the correlation set initialized by any first receive shape or send shape.

Please refer below great article for more details.

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