I want to develop backend server for mobile apps(android,iOS and windows) with azure mobile service(.net). I am looking for a sample project which has repository pattern and unit of work pattern implemented in mobile service.
Till now I have not seen any sample which explains this possibility. If any one has come across then please share a link with me.
I want to implement an enterprise level application architecture with azure mobile service(something like onion architecture) where I can isolated each layer from other. Also wanted to know whether it is possible with mobile service .net back end or not?
If any one has any good link or sample project or suggestions then please share it.
Thanks
A repository pattern is just a fancy way of saying "I want to work with complex views of the database and/or abstract the database away from the user". similarly, a unit of work pattern is just a fancy way of saying "I want to work with transactions". The Onion Architecture is just a fancy way of saying "Separation of concerns". So, basically, you want an enterprise application (probably mobile) where the user doesn't see the implementation of the database, data layer is separated from business logic and presentation logic and you can support transactions?
Azure Mobile Services and it's successor, Azure App Service Mobile Apps provide a great way of getting at views of the data - you just set up a view within your database and then Entity Framework can expose that view for you. it is generally used to expose database tables and there are plenty of examples in the Azure Samples - including the FieldEngineer demo, which provides a concrete example of an enterprise-level mobile application.
You have not provided any details of your application which would indicate design decisions. Azure App Service and Mobile Apps, at the end of the day, are just APIs on the wire. They provide a consistent identity and data access layer for the data stored in Azure services.
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I'm confused about Firebase and serverless in general, as I was just introduced to this concept recently (note that I'm still studying computer science and I'm just exploring on my own now).
In the past I've been part of a project that had the following structure:
Front End in a Single-page-app
Back End built as a REST API
Now let's say I want to build a product, that might have a website and mobile apps. It also has to have backend logic as there are accounts, objects owned by users, and possible integration with a payment service.
What I initially expected from this, before knowning about serverless, is that you build a backend using something like Go (was my case), where you handle all the database data and third-party integrations, build a front end with something like Vue, and then use the backend's REST API to communicate between both of them.
Is this still the case with serverless? Do you build the whole backend server code, or does it work in another way?
I don't need/want you to explain all of it to me. I just need some insight on what is done and common so I can investigate further.
I'm in the process of designing a cloud deployed website for a new solution my company is looking to provide. I have been attempting to answer a few questions and haven't had any luck, so when in rome.
First, I don't want the website to be stuck to any one particular framework. I know there is no way to completely future proof a website, but I would rather not put all of our eggs in one basket.
Secondly, I want to have a separation between the front and back end entirely. I have a list of reasons why I'm looking to do this, don't necessarily want to get into the conversation of what they are. Server Side rendering for the most part is out of the question.
So where does that leave me?
My initial thoughts on the design are to have a REST API that can be accessed for any API calls (this may be turned to GraphQL in the future).
The design decisions that I'm mostly wresting with are for the front end. The website will be a dashboard type system, where tenants can log in and see screens for them.
I was thinking that I would have a sort of shell, that hooks on to the index.html. This would have it's own routing, that would render micro-applications that are completely separate from the shell logic.
So for example, if I load index.html, path being "/"
It has some routes that it's responsible for, lets say
"/todos"
"/account"
If I accessed the /todos route, my shell application would then render that micro app. This application would be completely separate from the shell, except some data that might be loaded via the window. Once this application is rendered via the shell application.
So my todos route, for example, could be a redux application that's independent. It could have it's own routing, etc.
Is this is a common architecture? Are there any examples of this? Is there a better way of going about this?
Thanks for any insight!
Sounds like your well and truly over engineering this beast.
You may take on such an architecture for a HUGE build with many dev teams all working separately. Small agile team, the above would create so much overhead in boilerplate and brain ache in context switching between each "app"
Micro-service architecture is seriously great. Just don't break it up too small, read your use case well and break your services up accordingly.
For example: we are a team of 3. We have a pretty large-ish app devised into:
Php API
Backend management interface (redux)
Frontend website (html, react, php)
Search service (elastic search)
Cache (redis)
Data store (mysql)
All on running in multiple docker containers across multiple hosts. Pull down the backend.. Fine the frontend website is still up and running!
I'm trying to build an API which can be used to update some master data in my app. It contains various drop-downs for city, country etc. Whenever I add new data in these drop-downs, I need the apps to hit this API once a day and get the latest data. Also, if the API is requested older data (from older apps), it should be able to return such data based on some date query parameter.
What's the best way to create such an API?
Also, the API needs to be RESTful and will be exposed to Android/iOS environments.
API should be able to return so based on some date query parameter.
You can use two columns created_at and updated_at in you tables schema. So how can this will useful for your situation:
Whenever some one hitting api without date parameter, you are return all data which are created before current time.
Whenever some one hitting api with date parameter then you can return data which are created before value of date parameter.
Obviously you have to write complete logic for this at server side
end.
Please explore one of the Mobile Backend as a Service (mBaaS) products for your long term needs.
Here are some players:
BaasBox: Open source backend
Backendless: Allows
developers to have an instant backend without writing server-side
code.
Apigee App Services: provides a lot of free storage, push notification, analytics etc.
Appcelerator: An BaaS targeted at the Enterprise audience.
For the short run you may want to try https://www.webscript.io/ to embed some quick javascript code to return the JSON response for you.
I would put a spin on #Santanu's suggestion of using BaaS. I would recommend using a BaaS during the development phase of your project.
When the iPhone and Android Apps have been developed and tested, replace the Baas-based server components with a in-house built RESTful server.
This approach has a couple of benefits. It lets you divide the effort into two distinct parts: the client changes to your product, and the building of your server component.
I assume your company's current expertise lies in App development, so it should be easier for you all to upgrade your applications to use the BaaS-based APIs.
It will also be much easier to reiterate and refine your data components and models using a mature BaaS server.
With Apps using data requests to populate the drop-downs from a BaaS-based RESTful API, and stable working data models and data sets hosted in the BaaS servers, it will be much faster to start building your own RESTful service.
When you run into issues, you will be confident they are in the server side code. You can run A/B tests with the same Apps against two versions of the server and ensure the client experience is the same.
You could continue to use the BaaS Server for rapid prototyping and developing API extensions.
I'm writing a mobile application, and this mobile application will be talking to a server in Azure to get data, and possibly push some too.
Now, I always had it in mind that I was going to write a simple RESTful web service that was going to deal with all this, and host it on Azure in a website - however, I've since discovered their Mobile Services, and I'm not entirely sure I understand what it's for.
Looking at it, it seems that it's about extracting away the code running on the server from you, and what you push to it, is what you get back? So it wouldn't be much use for me, as my web service is going to be returning data dependant on logic etc. However the ability for the Mobile Services to deal with push notifications directly is nice (how hard is it to use Azure Websites to send push notifications through mobile services?)
However, I wonder if I'm missing something? I'd rather not have to go re-invent the wheel as such, is Mobile Services will do what I need, especially as I'll be using Xamarin and there is a nice component to talk to Mobile Services...
Thanks
I am facing the same question: Should I use Azure Mobile Services or roll my own REST service. Below are some discoveries I have made so far.
With Azure Mobile Services there is a backend running a set of assemblies, which your code ultimately depends on. This is fine until you start using versions of other assemblies, which are not compatible with the versions Microsoft hosts. To me this is a major pain. This problem alone makes me question whether I want to use Azure Mobile Services. If you make your own REST service, I do not expect you to face these problems. See this link for details.
You should note that an Azure Mobile Services is tied to a single Azure region: If your Azure region fails, you need to manually migrate to another Azure region. This might not be a problem for your project. If you want to run in more than one region, I think it will be easier to roll your own REST service.
Regarding push notification, you could do that without using Mobile Service. See these links:
http://msdn.microsoft.com/library/azure/jj927170.aspx
http://weblogs.asp.net/scottgu/broadcast-push-notifications-to-millions-of-mobile-devices-using-windows-azure-notification-hubs
Auto-scaling is supported out-of-the-box in Azure Mobile Services. You would need to make your own scaling logic if you make your own REST service. You can scale VMs using Azure’s REST API, but it will be more work than using Mobile Services.
Authentication is supported in Azure Mobile Services. You would need to look into a separate framework to do this if you make your own REST service.
If you use Mobile Services you will probably create ASP.NET Web APIs through the Visual Studio wizards. There are examples and tutorials, which is great. However, even if you roll your own service, you could build on other frameworks. One example is ServiceStack, which I would strongly consider if you want to make your own REST service. I think ServiceStack could also help with authentication.
If you use Mobile Services you will tie yourself stronger to Azure. By rolling your own REST service it will probably be easier to move to another infrastructure later.
I've been ramping up on Azure Mobile Services over the past week. There are definitely some PROs and CONs in using them over a standard Azure Web Site where I can write APIs that hit SQL DB, etc.
One of the biggest negatives I see is developing the server side code and DB structures ON THE SERVER. I've watched lots of videos from launch and beyond, read lots of blog posts about tips and tricks around WAMS, but nobody seems to talk about the downside of developing the code (server scripts) and database structures on the server, at your live URL.
This is all great for developing the first version of your mobile app and associated mobile services. But once it's all deployed, how do you ever build version 2? Real apps hitting real APIs and data, but now I want to develop/change/play with the server scripts and database schema?
With Azure Web Sites, I can develop locally and only publish code and DB changes to the server on my schedule.
Have any of you seen or heard of the "v2 development story" around Azure Mobile Services?
Only thing I can think of would be to create another set of tables and APIs around them, most likely "virtual tables" that allow me to write APIs against the original set of data. Seems like a huge hassle, since the client code would now have to know about the original set of tables and the new set of tables... that's only for v2...
Thanks for any thoughts / insight.
You should have two services, one dev and one production and use scripts to promote your code from dev to production (pretty similar to how most workflows go, in moving from a test setup to a production one).
http://channel9.msdn.com/Events/Build/2013/3-511