Basically what I need is to to call DbContext.SaveChanges a few times and at the end, commit the transaction or rollback.
It is an MVC application based on .NET 4.5 and EF 5 hosted on Windows Azure.
-- EDITED --
I found out TransactionScope works well in Windows Azure as long as you only have a single connection (lightweight transaction).
The exception I was getting was due to the fact that I was using DbContext and A Membership Provider inside the same transaction.
I started a new post with more details and code here.
You should look at using a TransactionScope:
TransactionScope Class
Simple way of using transactions in ADO.NET Entity framework
Related
I'm starting to wonder whether this is the right tool for the job, still here goes.
I'm attempting to automate the creation of our Azure Test environment using Azure SDK for JS. The environment spans many services (as you can imagine), including Classic ASP.NET app services.
Node is my safe space, so that is why I started with the JS SDK.
I have started scripting the creation of an app service using WebSiteManagementClient.webApps.createOrUpdate. I'm confused though, there is seemingly no way to configure any of the following:
Which app service plan the app service should be connected to. This feels fundamental.
The operating system, Windows or Linux.
The stack version, .NET 4.8, .NET Core, or whatever.
Is it possible to configure the above using the JS SDK, or am I going to have find another approach?
Update 23/03/21
Untested, but these are my findings so far:
App Service Plan - The plan is set using the serverFarmId property of the Site interface.
Operating system - Assuming Windows as the default, if you want a Linux app service, you change the kind property of Site from app, to app,linux.
Stack & version - In the SiteConfig interface, you have linuxFxVersion and windowsFxVersion. Again, I think the assumption is 'latest .NET' (e.g. .NET 4.8). For .NET Core 3.1, the setting looks to be DOTNETCORE|3.1.
It can be achieved using js SDK. I checked the source code and it is ok. But I don't recommend to use js sdk to do this.
Because you need to call the SDK, there are many internal logics that you need to code. This will waste a lot of your time. So I recommend you to use restapi.
The restapi method name is similar to the naming in the SDK, mainly because you can test api interfaces online to achieve the functions you want. So you can selectively choose the method you want to achieve the function you want.
Official doc
Web Apps - Create Or Update
As for your concerns, you only need to write all the configuration in json format and put it in the request body.
Tips:
First use the online interface, encode the json format, create a webapp according to your needs, and then integrate it into your code.
I've recently switched jobs from a AWS shop to an Azure shop, both using dotnet. AWS publishes Amazon.Lambda.AspNetCoreServer, which is a magic Nuget package that allows you to write a plain ol' ASP.NET core Web API and deploy it as into a lambda with only a few lines on config. I really loved this pattern because it allows developers to just write a normal web api without having the host runtime leak into their coding.
Does anything like this exist in Azure? Even something that is community supported? Or is there some any way to achieve something like this in Azure Functions?
Unfortunately there is no simple way to do that since Azure function format is a bit different.
[FunctionName(nameof(GetAll))]
public IActionResult GetAll([HttpTrigger("get", Route = "entity")]HttpRequest request)
Then it will generate json with meta data for AF.
If you wish to host pure .net core without any changes I would look into Containers option
PS0: Theoretically it would be possible to do it with little bit of reflection. For instance you create project with all your Asp.Net core apis, which you can use in asp.net core hosting. Then you write tool which grabs your dll and using reflection you find all actions in your controllers and generate code for AF
PS1: Have a look https://github.com/tntwist/NL.Serverless.AspNetCore
does any tool exist that can simplify generation of the new APP if the DB already exists? I can create JDL file for new app manually base on existing DB - but I prefer to automate the process. This DB is part of old Spring Roo app.
Thank you.
The spring Roo 1.x version provides the "Database Reverse Engineering" functionality. This add-on allows you to create an application tier of JPA 2.0 entities based on the tables in your database. DBRE will also incrementally maintain your application tier if you add or remove tables and columns.
After generate the entities, you could execute the necessary web mvc commands to generate the complete application.
However, remember that the Spring Roo 1.x is not beeing maintained, because uses old technologies.
See more about the DBRE process here:
http://docs.spring.io/spring-roo/reference/html/base-dbre.html
Hope it helps,
There's a JHipster module that is being developed for this purpose: https://github.com/bastienmichaux/generator-jhipster-db-helper
It is probably not ready yet but could be a good start.
For doing authorization in asp.net mvc 5 I have searched lot on internet but not getting correct answer. Actually I am using Visual studio community edition with .net framework 4.5.2 and mvc5. I want to do the Authorization in my project. My project is created with no authentication mode while creating a project.
Firstly I have tried these things:
I typed a command "Enable Migrations" on Package manager console.
Then I got one error like: Creating a DbModelBuilder or writing the EDMX from a DbContext created using Database First or Model First is not supported. EDMX can only be obtained from a Code First DbContext created without using an existing DbCompiledModel.
I dont know how to resolve this error. please help me to get out of it.
Which approach did you chooses to build our database model? Code First, Model First or Database First?
I'm asking because you can't use migrations with Model First or Database First approach. EF Migrations is a product targeted for Code First approach. CodeFirst assumes that you will never make any changes manually to the database. All the changes to the database will go through the code first migrations.
But there is solution for that - you can use Code First approach with an existing database. Take a look here: Using EF “Code First” with an Existing Database.
I am implementing a solution that has a web interface (service stack) and a long running job service (servicestack?).
I already implemented the web interface and found servicestack a really good framework for creating what i wanted. I used redis as a semi reliable object store.
Then i started to think about how to implement the job service.
What i originally thought i do was to set up a simple windows service and have the redis client pick up thinks marked for the job service ( how exactly i wasn't sure ). These are very long running jobs that require alot of resources so i want to throttle how many of them are running at a time and also if i could fan out with worker machines that would be nice.
Then i saw that ServiceStack has a RedisMQ that might fit the bill, and hence the question.
Should i create a seperate servicestack service and host it in a windows service. Then have a MQ interface on it and let the webservice post to that message queue jobs that need to run. Then the jobservice is decoulpled from the webservice and all is well.
or
Am i over thinking it and should just use the logic part of the service i already have running and implement the job logic there, could pop in a MQ but in the same process that would probably just be a waste of time. I could skip the message part entirely and just call the logic part straight with some throttling algorithm.
Also when i was testing this out i had trouble with creating the RedisMQ server
using ServiceStack.redis;
using ServiceStack.messaging;
var mqHost = new RedisMqServer(redisFactory, retryCount:2);
Returns RedisMQServer not found.
I did a full nuget install of the servicestack and servicestack.redis packages
install-package servicestack
install-package servicestack.redis
When i use object browser on the .dll i don't find any mention of the ReidsMQServer, the version i 4.0.15
I found this url https://github.com/ServiceStack/ServiceStack/blob/master/src/ServiceStack.Server/Messaging/Redis/RedisMqServer.cs
And would think that this should belong to the servicestack.redis reference.
Any help appreciated,
cheers
Redis MQ is in the ServiceStack.Server NuGet package, i.e:
PM> Install-Package ServiceStack.Server
When in doubt as to which package to install, refer to ServiceStack's download page, e.g: https://servicestack.net/download#mq