{"id":729,"date":"2008-01-21T11:31:00","date_gmt":"2008-01-21T11:31:00","guid":{"rendered":"\/blogs\/bobb\/post\/Service-Broker-in-SQL-Server-2008-Priority-By-Contract.aspx"},"modified":"2013-01-07T09:00:24","modified_gmt":"2013-01-07T17:00:24","slug":"service-broker-in-sql-server-2008-priority-by-contract","status":"publish","type":"post","link":"https:\/\/www.sqlskills.com\/blogs\/bobb\/service-broker-in-sql-server-2008-priority-by-contract\/","title":{"rendered":"Service Broker in SQL Server 2008 – Priority By Contract"},"content":{"rendered":"

\nConversation priority is a new feature with SQL Server 2008. In a previous blog post<\/a>, I talked about how to simply set one up. But you'd usually not want to set up a priority for all messages. So, lets set up a simple service and then define a "Premier Customer" priority. Before trying this you need to make sure the database is set to honor broker priority.\n<\/p>\n

\nALTER DATABASE pubs SET HONOR_BROKER_PRIORITY ON;\n<\/p>\n

\nSuppose I had a simple (one database) service pair. A service called "sender" (note lower case) using senderq is the initiator and a service called "receiver" using receiverq is the target. They use the [default] contract. So we can set up a "Premier Customer" by contract.\n<\/p>\n

\nCREATE CONTRACT premier ([DEFAULT] SENT BY ANY);
\nGO\n<\/p>\n

\nNow, let's ensure that the target can also use the premier contract in addition to the DEFAULT contract.\n<\/p>\n

\nALTER SERVICE receiver ON QUEUE receiveq (ADD CONTRACT premier);\n<\/p>\n

\nWe need to set up the priority.\n<\/p>\n

\nCREATE BROKER PRIORITY PremierCustomer
\n    FOR CONVERSATION
\n    SET (CONTRACT_NAME = premier,
\n         LOCAL_SERVICE_NAME = sender,
\n         REMOTE_SERVICE_NAME = 'receiver',
\n         PRIORITY_LEVEL = 7);
\nGO\n<\/p>\n

\nThe interesting thing is, this priority ONLY covers messages sent and received (and get conversation group) by the sender\/senderq, IT DOESN'T cover the receives in the receiver\/receiveq queue. So we'll set up a mirror image priority, and make the priority level still higher than the default (5) but gratuitously different than the other priority\n<\/p>\n

\nCREATE BROKER PRIORITY PremierCustomer2
\n    FOR CONVERSATION
\n    SET (CONTRACT_NAME = premier,
\n         LOCAL_SERVICE_NAME = receiver,   — local service is receiver
\n         REMOTE_SERVICE_NAME = 'sender', — remote service is sender
\n         PRIORITY_LEVEL = 6);                   — note level 6, not 7
\nGO\n<\/p>\n

\nNow, begin a conversation using sender and receiver and the premier contract and send a message. Note that when you issue "SELECT * FROM sys.conversation_endpoints;" the sender (initiator's) endpoint is priority 7, the receiver's endpoint is priority 6. And, looking at the message in the receiveq its set to priority 6.\n<\/p>\n

\nIf you'd send a return message from the receiver (target) back to the sender (initiator), the return message in the senderq would be priority 7.\n<\/p>\n

\nSo when setting up priorities, if you want all messages on both sides to be affected, don't forget to set up a priority for EACH side. Here's the entire demo.\n<\/p>\n

BrokerPriorityByContractDemo.zip (1.57 KB)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Conversation priority is a new feature with SQL Server 2008. In a previous blog post, I talked about how to simply set one up. But you'd usually not want to set up a priority for all messages. So, lets set up a simple service and then define a "Premier Customer" priority. Before trying this you […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24,29],"tags":[],"class_list":["post-729","post","type-post","status-publish","format-standard","hentry","category-service-broker","category-sql-server-2008"],"yoast_head":"\nService Broker in SQL Server 2008 - Priority By Contract - Bob Beauchemin<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sqlskills.com\/blogs\/bobb\/service-broker-in-sql-server-2008-priority-by-contract\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Service Broker in SQL Server 2008 - Priority By Contract - Bob Beauchemin\" \/>\n<meta property=\"og:description\" content=\"Conversation priority is a new feature with SQL Server 2008. In a previous blog post, I talked about how to simply set one up. But you'd usually not want to set up a priority for all messages. So, lets set up a simple service and then define a "Premier Customer" priority. 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