Using ServiceStack ORMLite https://github.com/ServiceStack/ServiceStack.OrmLite I want to trace certain database calls with CaptureSqlFilter or some similar technique. However when you use this filter it captures the "intended" SQL but stops the commands actually being executed. This appears to be by design.
I want to use this or a similar technique to trace the ACTUAL calls made to the DB without stopping them.
Note that I want to do this in the code, I'm using SQL Azure so can't readily use SQL Profiler etc to achieve a similar result.
Thanks.
If you enable a Logger with Debug enabled it will log the SQL to your registered Logging Provider.
Otherwise you can also enable ServiceStack's built-in Mini Profiler which will provide access to the executed SQL.
Related
I want to execute database operation in a handler and then send three commands to other handlers.
I want to make sure that all the execution of database operation together with sending commands occur in a transaction and whether all succeed or all fail.
I am using .net core and when I try to do this I get an exception that "This platform does not support distributed Transactions"
I was using RabbitMQ Transport and then SQL server transport but still getting the same problem.
I would like to know the best way to ensure that all the execution is ATOMIC under .NET Core and RabbitMQ or SQL Server transport.
Thanks
I am surprised that you get this particular exception, because Rebus does not participate in distributed transactions (at least not with any of the supported transports, and especially not with RabbitMQ).
Could you maybe update your question to include the full exception details (with stack trace and everything)? And maybe tell a little bit about how you're performing your database operations?
when I use the cloudify(2.7) to deploy an application(e.g. an application app includes two services A and B ),I try to use the Admin.addEventListener() to add some eventListener,but it does't work !
I try to add the ProcessingUnitStatusChangedEventListener ,when I debug the code,the value of (ProcessingUnitStatusChangedEvent)event.getNewStatus() changes from SCHEDULED to INTACT,then SCHEDULED,then INTACT again,
I also try to add the ProcessingUnitInstanceLifecycleEventListener,when I debug the code,the status is intact,but the service is not available!
Is there any other listener or method to know the application(not the services) is available,or I use the listener in the wrong way?
First, the Admin API is internal - use it at your own risk. And you should not be using it the way you are - Cloudify adds a lot of logic on top of the internal Admin API.
Second, it is not exactly clear where you are executing your code from.
You can always use the rest client to get an accurate state of the application. Look at https://github.com/CloudifySource/cloudify/blob/master/rest-client/src/main/java/org/cloudifysource/restclient/RestClient.java#L388
In addition, if you are running this code in a service lifecycle event handler, the easiest way to implement this is to have your 'top' level service, the one that should be available last, write an application entry to the shared attributes store in its 'postStart' event. Everyone else can just periodically poll on this entry. The polling itself is very fast, all in-memory operations.
If you do not have a top-level service, or your logic is more complicated then that, you would need to use the Service Context API to scan each service and its instances to see if they are up. An explanation on getting service instance state is available here:
cloudify service dependsOn other service
I have a requirement where third party software running on a desktop will write to a local database and I need to send some of that information to a remote web service. I don't have any control over the thirdparty software that is doing the insert but I can read the database.
My approach is to have a windows service check the local table every second for an insert, if there is an insert send the webservice request. I don't like checking every second but this whole process needs to happen in a short amount of time after the insert. Is there a better way to go about this? Some kind of listener? I don't think I can use triggers.
This will be .NET and SQL Server if that matters.
Try using the SQLDependency class. Implement the onChange method of the class to handle your processing. The following article describes the process of configuring your environment and has some sample code for this.
http://www.codeproject.com/Articles/144344/Query-Notification-using-SqlDependency-and-SqlCach
I'm looking for a feature much like the Log property in Linq DataContext.
All executed SQL is written to the Trace, so you can access is using a TraceListener.
I have been given a task where it should be possible for a user to pass some information to a database table.
The table should be seen as a queue.
My question is:
Is it possible to execute some code on the webserver asynchronously, so the users can use the website for others tasks meanwhile processing the queue?
Is it possible to use the Thread class and how ?
Look into Asynchronous Pages as a start - it is teh easiest way to do what you describe.
http://msdn.microsoft.com/en-us/magazine/cc163725.aspx
You could use a service bus to get this done. If you feel up to it you could have a look at my open source esb:
http://shuttle.codeplex.com
It has an implementation that can use a sql table as a queue.