SSB(SQLservice Service Broker) 入门实例介绍

step 1：perpar database & data

复制代码 代码如下:

use master
go
Create database Inventory
go
use Inventory
go
Create table inventory
(
TitleId nvarchar(6) not null,
Quantity int not null,
primary key (TitleId,Quantity)
);
go

insert inventory values ('pc1001',100);
insert inventory values ('pc1002',200);
insert inventory values ('pc1003',300);
insert inventory values ('pc1004',400);

首先创建信息类型

复制代码 代码如下:

Create Message Type [//mark/v10/types/inventory]
Create Message Type [//mark/v10/types/inventoryresponse]

复制代码 代码如下:

Create contracts [//mark/v10/contracts/inventorycontract]
(
[//mark/v10/types/inventory] send by initiator,
[//mark/v10/types/inventoryresponse] send by target
);

复制代码 代码如下:

create queue [inventory client queue];
create service [//mark/v10/services/inventory client]
on queue [inventory client queue]

go
--create inventory service
create queue [inventory queue];
create service [//mark/v10/services/inventory]
on queue [inventory queue]
(
[//mark/v10/contracts/inventorycontract]
);

复制代码 代码如下:

use Inventory
go
--send message
begin transaction
declare @dialog_id uniqueidentifier
begin dialog conversation @dialog_id
from service [//mark/v10/services/inventory client]
to service '//mark/v10/services/inventory'
on contract [//mark/v10/contracts/inventorycontract]
with encryption = off;
send on conversation @dialog_id message type [//mark/v10/types/inventory]
(
'<InventoryUpdate>
<TitleId>pc1001</TitleId>
<Quantity>102</Quantity>
</InventoryUpdate>'
);
commit transaction;

复制代码 代码如下:

select conversation_handle, cast(message_body as xml) as conversation_body from [Inventory queue]

setp 4: 从 inventory queue 中获取信息并更新数据

复制代码 代码如下:

use inventory
go
begin transaction
declare @dialog_id uniqueidentifier
declare @message_body xml
declare @amount int;
declare @title nvarchar(128);

receive
@dialog_id = conversation_handle,
@message_body = message_body
from [dbo].[Inventory queue]

print 'handle is' + cast(@dialog_id as nvarchar(90))
print 'message body is' + cast(@message_body as nvarchar(max) )
if(@dialog_id is not null)
begin
set @amount = @message_body.value('(/InventoryUpdate/Quantity)[1]','int');
set @title = @message_body.value('(/InventoryUpdate/TitleId)[1]','nvarchar(100)');
print 'a:'+cast(@amount as nvarchar(100))
print 'b:'+@title;

Update inventory set Quantity = @amount where TitleId = @title;
end
end conversation @dialog_id;
commit transaction;

数据同时被更新了

首先建立个存储过程，（把receive 中的那段代码拿过来就可以了）

复制代码 代码如下:

use Inventory
go
--create procedure to receive message and update table
create proc InventoryProc as

begin transaction
declare @dialog_id uniqueidentifier
declare @message_body xml
declare @amount int;
declare @title nvarchar(128);

waitfor(
receive
@dialog_id = conversation_handle,
@message_body = message_body
from [dbo].[Inventory queue]),timeout 5000;

print 'handle is' + cast(@dialog_id as nvarchar(90))
print 'message body is' + cast(@message_body as nvarchar(max) )
if(@dialog_id is not null)
begin
set @amount = @message_body.value('(/InventoryUpdate/Quantity)[1]','int');
set @title = @message_body.value('(/InventoryUpdate/TitleId)[1]','nvarchar(100)');
print 'a:'+cast(@amount as nvarchar(100))
print 'b:'+@title;

Update inventory set Quantity = @amount where TitleId = @title;
end
end conversation @dialog_id;
commit transaction;
go

复制代码 代码如下: