June 17, 2008

Service Broker - An Alternate to Messaging MS SQL Server

1. Enable Service Broker in the DB.
Use Master;
Go
ALTER DATABASE AdventureWorks SET ENABLE_BROKER;
go

2. Create Endpoint to send / receive messages from outside of SQL Server Instance.
- Create Endpoint with Port number and authentication level
Use Master;
go
CREATE ENDPOINT ExampleEndPoint
STATE = STARTED
AS TCP ( LISTENER_PORT = 3133)
FOR SERVICE_BROKER (AUTHENTICATION = WINDOWS KERBEROS);
go

Once Service Broker in STARTED state it will send /receive Messages. To stop either deacticate / pause

Use Master;
Go
ALTER ENDPOINT ExampleEndPoint
STATE = STOPPEDl
Go

To start again
Use Master;
Go
ALTER ENDPOINT ExampleEndPoint
STATE = STARTED
Go

3. TO Forward Message from One instance to another you need to have service endpoint started and follow the below syntax to Enable /disable forwarding. The Size mentioned is in MB

Use Master;
go
ALTER ENDPOINT ExampleEndPoint
FOR SERVICE_BROKER (MESSAGE_FORWARDING = ENABLED, MESSAGE_FORWARD_SIZE = 15);
go

Use Master;
go
ALTER ENDPOINT ExampleEndPoint
FOR SERVICE_BROKER (MESSAGE_FORWARDING = DISABLED);
go

4.Message Transport
BABP (Binary Adjacent Broker Protocol) and Dialog Protocol.
BABP - Basic message Transport, Bi-directional and multiplexed. Role to send messages.
Dialog - handles end to end communication and message ordering as a one-time-only in order delivery system. authenitcation and encryption is responsibility.

Steps to Create SErvice Borker:

1. Define Message Type and Validation
2. Define Contract
3. Create 2 queues sender and receiver
4. Create service and bind them to queue
5. Begin the conversation by sending messages.

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