Is This A Good Scenario For A Service Broker Application Usage
Jan 23, 2007
Hi,
Please excuse me if I get some terms wrong - I am not a developer!!
I am working for a company who has a requirement to interface to a customer to query for work. The customer has an established Web Services that it uses for external interfacing, these services are passive at their end, in that it will be my clients who initiate all the communications using SOAP, receiving responses in XML.
There are, as I see it, seven conversations.
Receiving Datasets
1. Requests All new Jobs - This will be a post to a HTP with a list of job numbers sent back, These jobs will then need to be polled from the same webservice.
2. Job Changes - existing jobs that have changed definitions (costs etc..)- simular to above
3. Job Changes - Appointment Times
Sending Datasets
1. Completed Jobs - one at a time
2. Cancelled Jobs
3. Appointments (I believe this is responses to 1 and 3 above)
4. Subsequent Jobs - new work derived from initial Job.
I believe the sending datasets will be one way only (ie POST).
I have suggested using Service Broker for this application, with a custom App sitting inbetween ServiceBroker and the Web Service to deal with the HTTP POSTS and GETS, and communicating with the Service Broker, posting to queues and reading from them.
Is this viable??
Many Thaks
Lawrenso
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May 7, 2007
Hallo I need some hints because I would like to set up my service broker in the proper way.
First: I'm going to setup service Broker between 2 databases on the same sql server instance.
My Goal: I insert the data on table1 in the DB1.On table1 there is a trigger that begin conversation and send the message to the service on the DB2.
On the receiving queue there is an Activation that take the xml message, shred it and save the content on th table 2 on the DB2.
Actually this SP is my main concern because the shred and insert involves also several checks so it could take "a while".
Volume of data: it seems that there are 100-200 daily insert in the table1 on the DB1 and it is possible that some of them arrives at the "same time".
Very quickly:
On the DB1 the trigger:
Notice that I reuse always the same conversation and the send queue as RETENTION = OFF
begin transaction;
begin
set @dialog_handle = (select conversation_handle from sys.conversation_endpoints where far_service='ReceiveService');
if @dialog_handle is null
BEGIN
BEGIN DIALOG CONVERSATION @dialog_handle
FROM SERVICE [SendService]
TO SERVICE 'ReceiveService'
ON CONTRACT [MainContract]
WITH ENCRYPTION = OFF;
END
SEND ON CONVERSATION @dialog_handle
MESSAGE TYPE Message ('uyiuy')
commit;
END
On the DB2
ReceiveQueue is defined as:
CREATE QUEUE [dbo].[ReceiveQueue] WITH STATUS = ON , RETENTION = OFF , ACTIVATION ( STATUS = ON , PROCEDURE_NAME = [dbo].[OnReceivedTrade] , MAX_QUEUE_READERS = 100 , EXECUTE AS N'dbo' ) ON [PRIMARY]
But most important is the Activation's SP and this is the main code:
while (1 = 1)
begin
begin transaction
-- Receive the next available message from the queue
WAITFOR (
RECEIVE top(1)
@message_type=message_type_id,
@message_body=message_body,
@dialog = conversation_handle
FROM ReceivedQueue
)
if (@@ROWCOUNT = 0)
BEGIN
Rollback Transaction
BREAK
END
SET @ErrorSave = @@ERROR ;
IF (@ErrorSave <> 0)
BEGIN
ROLLBACK TRANSACTION ;
SET @ErrorDesc = N'An error has occurred.' ;
END CONVERSATION @dialog
WITH ERROR = @ErrorSave DESCRIPTION = @ErrorDesc ;
INSERT INTO [dbo].[tblLog] VALUES(@ErrorDesc,NULL)
END
ELSE
BEGIN
'this is the SP that does most of the work
exec [dbo].[sp_ShredXMLMessageToRelationalData] @message_body
END
commit transaction
I have to say that everything works fine but I don't think that it is completly performant.
I read several blogs/forums and now I'm confused on the best way to implement service broker messaging:
These are my questions:
1) I read that is the DB's are in the same instance It can improve performances the send the message directly on the Queue2.
Can be useful in my case? How to implement it?
2)In my case it is necessarly that I send a message back to the initiator?
3) In my case the conversation never end. I don't think that this is correct but in case of the data push who has to END the conversation? The target? the initiator? never end to avoid overhead (I read that big overhead is caused by the BEGIN and END DIALOG)?
3) where (initiator or Target) and how to handle the service broker error? In my case my applications are SPs and I need to inform the developer or DBA that something went wrong during the processing ( conversation or shredding stored procedure).
4) In my case is should be a good idea to think about how to solve the possibility of the "poison messages"
for sure I will find out other questions...
Any hint, link is appreciated!
Thank you very much!
Marina B.
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Mar 23, 2007
Some of my receiving service side applications usually work offline, andthey only are supposed to get connected to the network once/few times a day,to send/receive Service Broker messages.Will my sending service side application (permanent connected to thenetwork) keep retrying repeatedly to connect to the receiver?- Is retrying like that time consuming?.- I don't like it keeping trying over and over. Is retrying behaviorconfigurable?thx
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Aug 14, 2007
hi all,
i want to create a service broker application between two different instances.
can i achieve the dialog security and transport security with out using certificate?
like we can achieve the transport security using windows authentication (both the instances are in same domain).
so how to achieve the dialog security with out using certificates.
if any body has any link plz provide me.
Thanks a lot!!!!!!!!!!!!!!!!!!!!!!!!!!
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Sep 10, 2007
How to prevent the hang on the initator service broker if the target service broker is not started?
Our case has two service brokers (two databases), sometime, the target is need to turn off. But the sitation is the initator service broker (in fact, the message is sent from triggers) become hang, I want to prevent this case and continue to operation, and the messages should queue and will continue to send to target service broker when it startup. How should I do?
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Feb 26, 2008
hi
Do you have any good example of CURSOR with sqlserver. When we should use?
Any live example will be appreciated, also how to call Cursor from .net Web Application
pls help to learn
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Aug 17, 2007
hi ,
i am creating a service broker application between two different instance.when i am initiating a dialog from the source my message remain in the sys.transmission_queue.but its transmission_status column is empty.
i attached the profiler with both source and target by including all the service broker event.
in my source profiler i am getting the error like -- Connection attempt failed with error: '10061(No connection could be made because the target machine actively refused it.)'. with event Broker:connection
and in the target profiler error is --This message could not be delivered because the security context could not be retrieved. with event Broker:Message Undelivarible.
i have checked my port also using telnet with remotely and localy both working fine. i am using port no. 4001
and i have mentioned the port no. in the address of the route.
bt still getiing the error.
please help!!!!!!!!!!!
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Feb 16, 2008
Hello, I receive this error "The SQL Server Service Broker for the current database is not enabled, and as a result query notifications are not supported. Please enable the Service Broker for this database if you wish to use notifications." I attach the database in Management Studio to query and enable the broker using the scrip below but to no avail. ALTER DATABASE DataName SET ENABLE_BROKER ‘''<<------successfulandSELECT is_broker_enabled FROM sys.databases WHERE name = 'Database name' ‘'''<<-------value is 1 Global.asax ... Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs) System.Data.SqlClient.SqlDependency.Start(ConfigurationManager.ConnectionStrings("dataConnectionString1").ConnectionString) End Sub...Web.config ... <connectionStrings> <add name="dataConnectionString1" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|jbp_data.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" /> <add name="ASPNETDBConnectionString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPNETDB.MDF;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" /> </connectionStrings>... Hope you could help. cheers,imperialx
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Apr 5, 2007
Hi,
I am struggling with the position SSB could take in an SOA. If I would want a broker in the general sense, meaning an intermediary sitting between applications which exchange information through messaging, would SSB be a good candidate? I know Biztalk is probably the primary candidate, but in my scenario I would end up with Biztalk apps with empty orchestrations. Also, I think Biztalk is more expensive to manage. So I am looking for a lightweight broker for a simple SOA targeted at application interoperability, no fancy business processes in sight.
I look forward to some responses.
Kind regards,
Neeva
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Oct 1, 2007
I'm new to SSB, so please bear with me. Our application requirements are:
1) Web app gathers user input from a web UI.
2) Web app calls a stored procedure, passing in the user input gathered in step (1).
3) Procedure issues queries to multiple data sources (SQL Server 2005 db's) derived from the user input.
4) Procedure waits for replies from these multiple data sources, governed by a timeout in case a data source is unavailable or slow to respond.
5) Procedure aggregates the data returned in step (4) from multiple data sources into an XML document.
6) Procedure returns the XML document as an output parameter.
This is different than the usual SSB asynchronous application paradigm. In particular, I'm wondering:
How can I setup a synchronous dialog, where the procedure that issues the SEND waits for a reply from the target service? I don't want the initiator procedure to end after SENDing, but rather wait for the replies to those messages so it can aggregate the data from the reply message bodies.
Thanks - Dana Reed
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Mar 30, 2007
I am trying to send a message between to SQL Server 2005 instances on two different machines. I have checked all my routes and all my objects appear to be setup correctly. However, when running Profiler on the target machine, I receive the "This message has been dropped because the TO service could not be found. Service name: "[tcp://mydomain.com/TARGET/MyService]". Message origin: "Transport". This is my activated stored procedure that is sending the message to the target service. I am using certificate security. Any help appreciated....
CREATE PROCEDURE [usp_ProcessMessage]
AS
BEGIN
SET NOCOUNT ON;
DECLARE @conversation_handle uniqueidentifier
DECLARE @message_body AS VARBINARY(MAX)
WHILE (1=1)
BEGIN
BEGIN TRANSACTION;
WAITFOR(RECEIVE TOP (1)
@conversation_handle = conversation_handle,
@message_body = message_body
FROM [tcp://mydomain.com/INITIATE/MyQueue]
), TIMEOUT 1000;
IF (@@ROWCOUNT = 0)
BEGIN
COMMIT;
BREAK;
END
END CONVERSATION @conversation_handle
IF @message_body IS NOT NULL
BEGIN
BEGIN DIALOG CONVERSATION @conversation_handle
FROM SERVICE [tcp://mydomain.com/INITIATE/MyService]
TO SERVICE '[tcp://mydomain.com/TARGET/MyService]'
ON CONTRACT [tcp://mydomain.com/INITIATE/MyMessage/v1.0]
WITH ENCRYPTION = ON, LIFETIME = 600;
SEND ON CONVERSATION @conversation_handle
MESSAGE TYPE [tcp://mydomain.com/TARGET/VisitMessage]
(@message_body);
END
COMMIT;
END
END
GO
My endpoints are created like so:
CREATE ENDPOINT MyEndpoint
STATE = STARTED
AS TCP
(
LISTENER_PORT = 4022
)
FOR SERVICE_BROKER (AUTHENTICATION = CERTIFICATE MasterCertificate)
GO
GRANT CONNECT TO CertOwner
GRANT CONNECT ON ENDPOINT::MyEndpoint TO CertOwner
GO
And my routes like so:
GRANT SEND ON SERVICE::[tcp://mydomain.com/INITIATE/MyService] TO CertOwner
GO
CREATE REMOTE SERVICE BINDING [MyCertificateBinding]
TO SERVICE '[tcp://mydomain.com/TARGET/MyService]'
WITH USER = CertOwner,
ANONYMOUS=OFF
CREATE ROUTE [tcp://mydomain.com/INITIATE/MyRoute]
WITH SERVICE_NAME = '[tcp://mydomain.com/TARGET/MyService]',
BROKER_INSTANCE = N'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx',
ADDRESS = N'TCP://xxx.xx.xx.xx:4022'
GO
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Sep 26, 2007
I am doing some research to see if the Service Broker technology would help my company with our Enterprise application. Here is our scenario: We have a 3 tier system. The first tier needs to contact the second tier asynchronously. Hence, using queues is a good option. However, the process that needs to happen on the second tier is mostly process intensive with little database updates. Is it still worth our time to use Service Broker?
I like the concept of Activation that Service Broker provides. But, from what I am reading most of the documentation describes activation as a way to call another stored proc. I definitely dont' want to do any process intensive work on the SQL server. So here comes my question...
How would I use a windows service to listen to the activation event from the Service Broker. I could have multiple windows services watching the same queue (scalable). Would I have to handle collisions myself? If so, I think I would rather keep it simple, and just use a simple table as my queue.
Thanks for your comments in advance...
Vijay.
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Apr 5, 2008
Hi to all, I want to study Sql server Service broker, have some questions1. What is the use of service broker ?2. Where this will use ? (With example)3. How to enable Service broker? Because i have sql server 2005 version but no folder like service broker.
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Aug 29, 2006
Im having a hard time understanding everything required to create a simple Service Broker example. Can someone please assist? Source code would be ideal, but if not "do this, do that" would even be helpful.
Thanks.
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Sep 8, 2006
I am trying to implement service broker. I send a message from my application code to the database to execute a specific stored procedure. How do i return the result set obtained by the execution of the stored procedure to the application.
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May 16, 2006
My service broker seems to be broken... The database was restored from another crashed server but i have tried the
ALTER AUTHORIZATION ON DATABASE::[SPYDERONTHEWEB] TO [SA];
The error i'm getting is
Service Broker needs to access the master key in the database 'SpyderOnTheWeb'. Error code 25. The master key has to exist and th service master key encryption is required.
Error: 28054, Severity 11, State: 1.
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Sep 26, 2006
Hi
It will be great to have an update on MS plans to solve the problem of using
Service Broker for remote users who sit behind the NAT.
Any news will be appreciated.
Leonid.
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Sep 11, 2006
Hello , I am trying to Implement distribution of the Stock Quotes over the LAN(only within the Network) and showing the live changing stock Quotes on the front end (in datagrid) installed at each clients desktop.I am receiving the Stock prices over the TCP / IP from the Stock Exchange. I am recieving atleast 10-15 messages per second over the TCP / IP from the Stock Exchange. Now i need to distribute this feed to Each connected client.
I tried doing it from TCP / IP , but in vein. Can we install the SQL 2005 Database Client Version on every client and use Service broker instaed of Live TCP / IP connections programmatically?
Ideally Can i dump the meesages from Stock Exchange in to each connected client's database locally and each front end application will keep a record of all the incomming messages.i.e Front end have a notification event , it will referesh the Datagrid in Front end accordingly...
ALL my front end application are made in dot net
Pls suggest if this above workflow will help me
Yugant
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Jan 8, 2008
Hi,
Is it possible to develop Service Broker in .Net 1.1 (VS 2003)? Currently I have a project developed in .Net 1.1 and I want to add a new method utilize the message queue concept (instead of using MSMQ, using Service Broker SQL 2005), although my DB is SQL server 2005.
Thanks,
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Jul 3, 2007
Hi all
if any one have any white paper or artical cover this issue kindly i need it
thanks , regards
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May 16, 2007
Hi,
I am looking at the Service Broker as a way to notify multiple clients that there has been data changed on a table in the shared database. These clients may or may not be online. When there is a change, the notification should fire off a query to refresh the clients local cache. Is this a situation where Service Broker would help me? Can multiple clients recieve the notification at different times ( some recieve while online, some recieve when they come back online)? Any help on this would be appreciated. It seems from what I read that the messages are pulled off the queue when a notification has taken place. Is this correct? If so, can I set it to behave differently?
Thanks,
-paul
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Sep 15, 2005
Let's assume the situation: we have Initiator and Target. Target is behind ISP's NAT and can't be published outside. So, when Initiator sends a message to Target, Target will not be able to establish a backward connection and will not send an acknowledge. Initiator will retry and retry...
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Apr 26, 2008
I have tried the following, each runs successfully with no error, but nothing is in the queues, what can be the issue?
CREATE MESSAGE TYPE SentMsgType
VALIDATION = WELL_FORMED_XML;
CREATE CONTRACT MQContract
(SentMsgType SENT BY ANY );
CREATE QUEUE SentQueue
WITH
STATUS=ON, RETENTION=OFF;
CREATE QUEUE ReceivedQueue
WITH
STATUS=ON, RETENTION=OFF;
CREATE SERVICE SentService ON QUEUE SentQueue
(MQContract);
CREATE SERVICE ReceivedService ON QUEUE ReceivedQueue
(MQContract);
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TRIGGER [dbo].[insertTrigger]
ON [dbo].[tblBBB] FOR INSERT AS
BEGIN
SET NOCOUNT ON;
DECLARE @handle uniqueidentifier
DECLARE @msgBody nvarchar(500)
select @msgBody = someString from inserted
BEGIN DIALOG CONVERSATION @handle
FROM SERVICE SentService
TO SERVICE 'ReceivedService', 'CURRENT DATABASE'
ON CONTRACT MQContract;
--Sends a message
SEND ON CONVERSATION @handle
MESSAGE TYPE SentMsgType
('<message>' + @msgBody + '</message>')
END CONVERSATION @handle WITH CLEANUP;
END
SELECT * FROM SentQueue
SELECT * FROM ReceivedQueue;
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Oct 16, 2006
How to create service broker and whic version is supported to create serveice broker.
can you plz exlain to create servece broker from the scratch
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Feb 16, 2007
Hi everyone,
Can anyone let meknow how do i enable a service broker. I am trying to enable a service broker for an issuetracker application to get change of events in my database. When ever i try enabling it using the ALTER DATABASE [ databse] set Enable_Broker. it takes abt more that 2 hrs or more but doesnt show as enabled.
Thanks in Advance,
Pawan Venugopal
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Mar 22, 2007
So SQLDependencies failed to do what I wanted them to do for my Cache Invalidating, so i'm going to humor another possibility for a half day - Triggers on my database table that communicate messages to my C# inside my ASP.NET App. Any advice on how to tap into a message queue with C#? I'm thinking that my messages could be 1 of about 100 different strings as far as what occurred on the Database Tables
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Apr 25, 2006
Hi,
We have a customer whos database just grows and grows. Not the customers own tables, but the:
sys.sysconvgroup
sys.sysdesend
sys.sysdercv
And these tables are linked to the Service Broker, and according to http://msdn2.microsoft.com/en-us/library/ms179503.aspx these tables exists in every database and are used by the Service Broker.
Now to my questions =)
HOW do I delete rows from these tables? How come these tables hust grows and grows, could it be any setting in the SQL 2005 Server or is it the customer who has programmed his application wrong?
Please respond as soon as possible.
Best regards
.Henrik
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Aug 23, 2006
I'm in the process of doing the initial research for the architecture of a large scale, transactional messages routing platform.
My initial
design called for a series of MSMQ queues and Windows Services, written
in C#, to process the messages in these queues. There will be incoming
and outgoing queues, queues to store unroutable messages, etc.
My
application will be routing many hundreds of thousands (and eventually
millions) of messages per day. These message are very small (< 200
bytes each) and must be routed very quickly. (<1 second processing overhead per message for high priority messages.)
Using the term
"routing" may be a bit misleading. The messages arrive via TCP socket
connections. I will just need to take in a message, examine its
intended destination, and send it to one of several outgoing socket
connections, likely on different machines. Some messages require higher priority routing than others,
but I don't need multi-hop routing or anything like that.
Of
great concern to me is that there are absolutely no single points of
failure in the system. Because of this I was considering using a combination of MSMQ and Windows Services in a Clustered environment.
Can the Service Broker provide me with this kind of functionality? If so, how well does it perform and scale? Is it a better choice for messaging applications that require high transactional throughput than MSMQ?
I'm just trying to get an idea of what products/services I should look into further.
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Feb 27, 2007
i'm new with service broker and need to develop mail site to send mass email and decide to use sevice broker i'm make aqueue ,sevice and all function for run service borker and creat databasie mail profile
then test it but it's don't work please help me to fine what's the problem ?
thanks very mcuh for every one read my request and response to me thanks very mcuh
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Jan 17, 2007
Hello people
I am new to service broker and would like a little help please. I have a SP which gathers information from a collection of tables. Depending on the data gathered it may or may not begin a dialog conversation with a service broker queue. What i'm needing to know is should at the end of the SP once the required message has been sent should i end the conversation or not?
Many thanks in advance, Michael
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Jul 3, 2007
Hi, in the development env. I created the 2 dbs used by service brokers, the service brokers objects (messages, queues etc...).
The schema applied to tables and Activation SP is [dbo] and also the queues are executed as [dbo].
Everything works fine!Cool!
Now that we have to deploy evertything on production I would like that the service broker conversation runs using a specif user ( in this way when I log the Service Broker's errot in the event log I see this specific user and not my name)
Which kind of permission I have to give to this the user .. it is enought that I assign to it the schema DBO or I have to change the definition of my queues( execute as '[dbo]') or to create a new schema?
Thankx everybody fo any help!
Marina B.
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Mar 19, 2007
Hi,
I'm not able to get Service Broker to work. I've created the following sample and would excpect to get some data from "PreisanfrageQueue" or "PreisanfrageRequestorQueue". But both they are emtpy.
What do I do wrong?
Regards,
Manfred
create message type Preisanfrage
validation = well_formed_xml;
create message type PreisanfrageAntwort
validation = well_formed_xml;
create contract PreisanfrageContract
(
Preisanfrage sent by initiator,
PreisanfrageAntwort sent by target
);
create queue PreisanfrageRequestorQueue with
status=on;
create queue PreisanfrageQueue;
create service PreisanfrageRequestorService
on queue PreisanfrageRequestorQueue ( PreisanfrageContract );
create service PreisanfrageService
on queue PreisanfrageQueue (PreisanfrageContract );
create table debug_table;
create table debug_table (id int primary key identity(1,1), msg varchar(100));
create procedure PreisanfrageAction
as
declare @conversation uniqueidentifier
declare @msg nvarchar(max)
declare @msgType nvarchar(256)
declare @answer xml;
insert into debug_table(msg) values('1');
;receive top(1)
@conversation = conversation_handle,
@msg = message_body,
@msgType = message_type_name
from PreisanfrageQueue;
insert into debug_table(msg) values('2');
-- Preisanfrage bearbeiten
set @answer = '<preis>1</preis>';
;send on conversation @conversation
message type PreisanfrageAntwort (@answer);
end conversation @conversation;
insert into debug_table(msg) values('3');
alter queue PreisanfrageQueue
with
status=on,
activation (
status=on,
PROCEDURE_NAME = PreisanfrageAction,
max_queue_readers = 100,
EXECUTE AS OWNER
);
-- Dialog starten
declare @conversation uniqueidentifier;
begin dialog conversation @conversation
from service [PreisanfrageRequestorService]
to service 'PreisanfrageService'
on contract [PreisanfrageContract];
declare @request xml;
set @request = '<?xml version="1.0" encoding="UTF-8"?><Preisanfrage xmlns="4711101'">http://www.xyz.at/samples/Preisanfrage"><KundenId>4711</KundenId><ProduktId>10</ProduktId><Anzahl>1</Anzahl></Preisanfrage>';
;send on conversation @conversation
message type Preisanfrage ( @request );
receive * from PreisanfrageQueue;
receive * from PreisanfrageRequestorQueue;
select * from debug_table
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Feb 12, 2007
I am trying to use SSI Sto receive messages from a Service Broker Queue and continue to have difficulty doing so.
I have come to the point where I need to get the messages that share a conversation with this BatchEnd message type before I get any other messages, as this message type tells me information about how many others there are.
I built this script and ran it in management studio with success and felt it should work for me running as the sql for an OLE DB source.
declare @ch uniqueidentifier;
select @ch = conversation_handle
from dm.[consultant queue]
where message_type_name = 'BatchEnd';
Receive conversation_handle, message_type_name, message_body
from dm.[consultant queue]
where conversation_handle = @ch;
But SSIS constantly complains about it. I finally profiled SSIS to catch the sql that it is executing. It is below and this fails with an error about a missing conversation_handle.
declare @p1 int
exec sp_prepare @p1 output,NULL,N'declare @ch uniqueidentifier;
select @ch = conversation_handle
from dm.[consultant queue]
where message_type_name = ''BatchEnd'';
Receive conversation_handle, message_type_name, message_body
from dm.[consultant queue]
where conversation_handle = @ch;',1
select @p1
go
Now I'm not sure which team may own this, but shouldn't this sp_prepare work. If I change this to use a table variable then the prepare seems to work just fine, but then I never actually get any data back into SSIS. It is almost like it calls it twice; although, I could not confirm that with profiler.
I'll cross post this in the Service Broker forum too.
Thanks!
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