Using Service Broker For Reliably Transmitting Events To Consuming Applications
Apr 16, 2006
Hi, I have a scenario in which an application generates events upon updates to the database, which need to be reliably transmitted to consuming applications running a) other SQL Server instances and b) as remote web services.
Now,
1) I am planning to use SQL Server Notification Services to generate these events, and allow the consuming applications to subscribe to them.
2) The events will be sent to a ReceiveEvent service, which will then process the event and put it in the respective queues for the Subscriber (consumer) applications.
3) The services representing these consumer applications will then get activated, and sent the message across directly to the service broker on the consumer side in case of situation a - where there is a SQL Server on the other side
4) In case the other side is a web service, I plan to make a SOAP request directly from my queue handler, and depending on the response received, decide whether to commit or roll back that particular transaction.
Does this seem like a good solution? I am very new to the Service Broker, and I am still getting my hands dirty. Any comments/suggestions would be very highly appreciated!
We are developing a distributed application based on Tree Network Topology. Any part of this application knows only for one parent part and all children parts. For synchronize data with parts of this application we using SQL Service Broker.
Every part contains database. Lets name it SB?. This database contains one QUEUE for received and sent messages, MESSAGE TYPE, CONTRACT and SERVICE. Any Service on part has unique name. Also there are one REMOTE SERVICE BINDING and ROUTE for parent part (service) and on one fore every child part (service). For each link Source Target we create separate conversation_handle:
"BEGIN DIALOG @ConversationHandle FROM SERVICE [Source] TO SERVICE 'Target' ON CONTRACT Contract WITH ENCRYPTION = OFF;"
All works fine, messages sends and received quite well. But if we have opposite messages in one moment, with probability 100 percent one of messages, will be missing. Why it happened? Is duplex is not supported in Service Broker? May we do something wrong? Anybody encounter this problem?
We using flag retention = on for queue, to analyze messages after they processed. Body of Message that sent into several services (in one transaction) absent in that service from which the message during the same moment has been sent.
I'm working on the design of a system that will have two queues. The first queue will take requests to do something. The second queue will hold the results of having done something. Both queues won't necessarily be on the same physical server. Clients reading/writing to the queue will not be using SQL server. Web service/WCF interfaces will be developed to interrogate/manipulate queues.
My question is: which is better - MSMQ or Service Broker; if I want reliable queues. I can affort to loose items off the first queue, but cannot afford to loose any result data on the second queue.
Hi, Ive been taking a look at how to consume events from a package when executing programatically.
Ive got some code (copied below) that creates a package programatically, adds a sequence container then within that adds a script task , then executes it using the overloaded method of Package.Execute() that takes an IDtsEvents argument.
My class that implements IDtsEvents simply output a message to the console for each event type.
Weird thing is, when I execute, this is the only output I get:
What I find weird is that I dont get information for loads of other event types. I would at least have expected to see some OnPostExecute events.
Anyone know why i dont see all of the events?
Thanks Jamie
Heres the code:
Code Snippet using System; using System.Collections.Generic; using System.Text; using Microsoft.SqlServer.Dts.Runtime; using Microsoft.SqlServer.Dts.Tasks.ScriptTask; namespace Package_API { class Program { static void Main(string[] args) { Console.WriteLine("Starting..."); Package p = new Package(); p.InteractiveMode = true; p.OfflineMode = true; // Add a Script Task to the package. Sequence s = (Sequence)p.Executables.Add("STOCK:Sequence"); TaskHost taskH = (TaskHost)s.Executables.Add("STOCK:ScriptTask"); // Run the package. DtsEvents events = new DtsEvents(); p.Execute(null,null,events,null,null); //p.Execute(); if (p.ExecutionResult == DTSExecResult.Failure || p.ExecutionStatus == DTSExecStatus.Abend) Console.WriteLine("Package failed or abended"); else Console.WriteLine("Package ran successfully"); Console.ReadLine(); } } }
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?
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 β''<<------successfulandSELECT is_broker_enabled FROM sys.databases WHERE name = 'Database name' β'''<<-------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
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.
Can someone help me with a SSIS package that would consume from a Web Service (in fact two of them) and then load the data into SQL Server. I currently have Web Service task which connects to ForEachLoop task, and inside the loop task, I have a DFT. I am thinking, I would need to call the webservice utilizing the Web Services Task, and then store the output in a Full ResultSet variable. In my loop, I would like to loop thru the resultset, and store the data into SQL server. Inside the DFT, how would I construct this mechanism? Also, is this a good way to consume from a Web Service and then populate SQL Server? Are there any alternate ideas on this? Any documentation on this yet? Thanks.
Need a guidance on consuming the WCF service with complex type in the SSIS package. I have a WCF service with complex type inside the complex type (Nested complex type) in the web method as an argument. When I try to use this WCF service in the SSIS web service task, I get an error "The web method has unsupported arguments".
I am able to consume the WCF service with the web method having Complex type and simple/prmitive type in side that as argument.
For example:
The web method in WCF service which accepts the argument as comlex type say "Employee" whose structure is:
Employee { FName String; LName String; Age int }
It is possible to consume this WCF service and pass the arguments.
But when the Employee complex type is changed to have one more complex type in side it it give the above mentioned error. The Employee type is modified as:
Employee { FName String; LName String; Age String Type EmployeeType; }
EmployeeType { type string; }
Now I get the error Web Method has unsupported arguments.
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]'
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.
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.
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.
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.
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.
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.
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...
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.
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?
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...
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;
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
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
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?
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.
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
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?
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?
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));
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 );
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.
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.
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.
I am trying to run the Readme_HelloWorld sample on the SQL server 2005 Books online. But don't know where I can get the setup.sql, SendMessage.sql, ReceiveMessage.sql scripts.
I followed two examples on the blog, but they did not work at all. Here are the scripts:
/* example 1 */ create database TestSB go use TestSB go create queue TxQ create queue RxQ create message type Msg create contract MsgContract(Msg SENT BY ANY) create service TxSve on Queue TxQ Create service RxSve on Queue RxQ declare @h uniqueidentifier begin dialog conversation @h from service TxSve to Service 'RxSve' on contract MsgContract; send on conversation @h Message type Msg ('<hello>World</hello>') end conversation @h with CLEANUP;
select * from RxQ
/* example 2 */ use testsb go
create message type HelloMessage validation = NONE go
/** 2. create contract **/ create contract HelloContract (HelloMessage SENT by initiator)
begin begin transaction; begin dialog conversation @handle from service sender to service 'receiver' on contract HelloContract set @message = N'Hello, World'; send on conversation @handle message type HelloMessage(@message) end conversation @handle commit transaction end go
Receive convert(nvarchar(max), message_body) as message1 from ReceiverQueue
select convert(nvarchar(max), message_body) as message1 from ReceiverQueue
select * from SenderQueue
select * from Receiverqueue
Any assistance or WORKING samples are greatly appreciated.
