Back To Basics: Service Broker Contracts

Published On: 2008-06-02By:

Every Service Broker conversation requires a contract.  The contract defines which message type or types will be used, as well as who (sender or receiver) can use which message types.  The contract is specified when the conversation is created.

The syntax for creating the contract is pretty straight forward.

(MessageType SENT BY ANY)

The SEND BY portion can be used as many times as is needed for each Message Type which is defined on the contract.  It must be listed at least once as you can not have a contract with no message types.  You can specify that the Message Type be used by the INITIATOR, the TARGET or by both (by using the ANY keyword).

A more complex Contract would look something like this.



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