所有MSDN上的例子放在交易中发送和接收的语句。下面的脚本是http://msdn.microsoft.com/en-US/library/bb839499(v=sql.100).aspxSQL服务代理和交易
问题1:为什么所有的例子不使用begin try...end try begin catch...end catch
来处理异常?
问题2:如果消息消耗/处理需要多长时间?在SSB报表上进行长时间交易可以吗?什么是最好的方法?
问题3:如果消息名称不是'//AWDB/1DBSample/RequestMessage'
,以下代码不会结束对话。这是一个错误吗?
DECLARE @RecvReqDlgHandle UNIQUEIDENTIFIER;
DECLARE @RecvReqMsg NVARCHAR(100);
DECLARE @RecvReqMsgName sysname;
BEGIN TRANSACTION;
WAITFOR
(RECEIVE TOP(1)
@RecvReqDlgHandle = conversation_handle,
@RecvReqMsg = message_body,
@RecvReqMsgName = message_type_name
FROM TargetQueue1DB
), TIMEOUT 1000;
-- Process.... May take a long time
IF @RecvReqMsgName =
N'//AWDB/1DBSample/RequestMessage'
BEGIN
DECLARE @ReplyMsg NVARCHAR(100);
SELECT @ReplyMsg =
N'<ReplyMsg>Message for Initiator service.</ReplyMsg>';
SEND ON CONVERSATION @RecvReqDlgHandle
MESSAGE TYPE
[//AWDB/1DBSample/ReplyMessage]
(@ReplyMsg);
END CONVERSATION @RecvReqDlgHandle;
END
SELECT @ReplyMsg AS SentReplyMsg;
COMMIT TRANSACTION;