SSB(SQLservice Service Broker) 入门实例介绍

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);

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

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

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]
    );

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>'   
        );
        mit transaction;

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

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;
    mit transaction;

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;
    mit transaction;
    go

alter queue [inventory queue]
        with activation(
            status = on,
            procedure_name=    InventoryProc,
            max_queue_readers=2,
            execute as self
        );

        go

select message_type_name from [Inventory client queue]