Concurrency vs Multi-threading vs Asynchronous Programming : Explained

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Recently, I was speaking in an event and I asked a question about Asynchronous programming to the audience, I found that many were confused between multi-threading and asynchronous programming and for few, it was same. So, I thought of explaining these terms including an additional term Concurrency. Here, there are two completely different concepts involved, First – Synchronous and Asynchronous programming model and second – Single threaded and multi-threaded environments. Each programming model (Synchronous and Asynchronous) can run in single threaded and multi-threaded environment. Let’s discuss each in detail.

Synchronous Programming model – In this programming model, A thread is assigned to one task and starts working on it. Once the task completes then it is available for the next task. In this model, it cannot leave the executing task in mid to take up another task. Let’s discuss how this model works in single and multi-threaded environments.

Single Threaded – If we have couple of tasks to be worked on and the current system provides just a single thread, then tasks are assigned to the thread one by one. It can be pictorially depicted as

singlethreadedHere we can see that we have a thread (Thread 1 ) and four tasks to be completed. Thread starts workingon the tasks one by one and completes all. (The order in which tasks will be taken up, does not affect the execution, we can have different algorithm which can define the priorities of tasks)

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Dependency Injection Annotation Process in {{AngularJS}} – Part 18

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Hello All,

In last two post, we discussed about DI, various types available in AngularJS and some insights around it. It is going to be another post on DI itself but here we’ll talk about annotations.I would recommend to go through last two posts before going further.

  1. Dependency Injection (DI) in {{AngularJS}} – Part 16
  2. Dependency Injection (DI) in {{AngularJS}} Contd.– Part 17

Note – This post is a part of series of posts on AngularJS and it is 18th one. Click here to view all the post. Apart from that you can also use the navigation links for next and previous post in each post at the bottom to check all.

In our previous posts, we have seen that services are passed as a parameter with same name  which was used defining like Circle and this is crucial because Angular internally locate the services using the name itself. So if the name does not match then dependencies won’t be resolved. As the name should be same so minifying the script would break the application which cannot be accepted. So let’s first see that the number of options provided by AngularJS.

AngularAnnSo as we have seen, we have three ways to inject the dependencies. Lets discuss one by one

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Presented on ASP.NET performance tuning in C# Corner Hyd Chapter Event : 12th July 15

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11753645_10153514597568086_9069014579518330181_nHello All,

This was the first when I presented at a community event in Hyderabad. I was pretty excited for the day as I started hearing about this city since my college days due to its significance in IT. And yeah Microsoft’s develop center is also in this city. The day arrived and when I reached the venue, I found that most of the seats were full very early and we had some time to start the event as per schedule. Many kept standing throughout the event as the seats were already occupied completely. Here one point to be noted that we organized this event after long in this city and managed to get a venue which was not very known, also not easily accessible. I wasted more than an hour even when somebody was guiding me for the place on phone. Continue reading →

Dependency Injection (DI) in {{AngularJS}} Contd.– Part 17

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This post is in continuation of my last post DI on AngularJS. In previous post, we first discussed about DI in details with an example of implementing it in JavaScript. Then we discussed the way AngularJS provides us the opportunity to implement DI and various options available with it.  We discussed two types Value and Factory in detail. In this post, we will be discussing rest three types and will see how DI takes place behind the scene. I would suggest you to go through the previous post (Dependency Injection (DI) in {{AngularJS}} – Part 16) before continuing further.

Note – This post is a part of series of posts on AngularJS and it is 17th one. Click here to view all the post. Apart from that you can also use the navigation links for next and previous post in each post at the bottom to check all.

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Dependency Injection (DI) in {{AngularJS}} – Part 16

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Dependency Injection (DI) is one of the hottest terms being used in software development nowadays. Most of the application developers talking about this and try using it in their applications. One of the key reasons Agile methodology, as it is used in almost every project in one or other way and DI easily fits into this model and help in achieving its goal. I have been getting many request to write about DI in AngularJS so let’s start exploring that.

Note – This post is a part of series of posts on AngularJS and it is 16th one. Click here to view all the post. Apart from that you can also use the navigation links for next and previous post in each post at the bottom to check all. Continue reading →

How to use Angular Filter in Controller, Factory, Service – Part 15

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In last two posts, we explored about the Filters and saw that how easily we can create custom filter and use as Angular predefined filters. We have used these filters in views for a single as well as an array of items. This is a normal scenario but there could be some cases where you need to use these filters in other components like Controllers, Factory, and Services etc. I have seen many questions around this on different online forums. So I thought to discuss it in detail.

If you are new to Angular Filter or even if you have some idea about, I will highly recommend you to go through my below two earlier Posts then continue. In this post, I will use the same examples that I used in my previous two posts as well.

Exploring Filters in {{AngularJS}} – Part 13

Exploring Filters in {{AngularJS}} Contd. : Custom Filters – Part 14

Note – This post is a part of series of posts on AngularJS and it is fifteenth one. Click here to view all the post. Apart from that you can also use the navigation links for next and previous post in each post at the bottom to check all. Continue reading →

Exploring Filters in {{AngularJS}} Contd. : Custom Filters – Part 14

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This post is in continuation of my previous post regarding Filters. (Click here to go to previous post). In last post we discussed about the basics of Angular Filters and found that how easy is to use the predefined filters with examples. This post is also fourteenth post in the series of AngularJS and to see all the previous posts, click here.

In this post, we will be discussing about custom Filter, its uses and create a few custom ones. Also we’ll try to explore some more flavors of the filters. We discussed two main types of Filters in previous post, one that transforms a single item in different format. Another one that can be applied on array of items which produces another array after applying Filter .The resultant array could have same or less number of elements and contain same or transformed data. As we discussed in my earlier posts that Modules in Angular are like containers. It is a top level element and contains all the components of AngularJS. So every custom items must be registered with it. Same is true here as well. Let’s start creating a filter of first type, we already saw some Filters like uppercase, lowercase, currency etc. Now we are going to create a Filter which currently does not exist. It takes a string of numbers and convert into phone number format. Excited?

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Exploring Filters in {{AngularJS}} – Part 13

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AngularJS is one of the hottest technologies currently in market. Every web project built on any platform whether .NET, JAVA, PHP or any other, all are just embracing it. It is because the kind of power, flexibility, openness and many other awesome features provided by AngularJS. But I would say even we are using this framework in most of our web applications, but we are not leveraging the real power of of many features. In this post, I am going to discuss about Filters and how to get best out of it.

This post is again in the series of Posts of AngularJS and it is thirteenth in the list. To go though the previous posts in the series, click here.

Filters is one of key features provided by AngularJS and almost used in every web application. In this post, we will be exploring it with bunch of examples. We’ll start from basics then dig deep and create our own custom filter at the end.

What is Filter Continue reading →

A Great unification of Controllers: ASP.NET 5

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This is another post on one of the cool features of ASP.NET 5. Microsoft introduced One ASP.NET concept with ASP.NET 4.5 which allows us to use MVC, Web API, Web forms in one project without any pain. But as we know that MVC and Web API follow the same coding constructs like controller, action but inherently they were different. There were some features like OutputCache (Refer one of my earlier post ) is available only with MVC not with Web API. Microsoft has redesigned ASP.NET MVC and Web API framework and made it truly one ASP.NET with vNext (ASP.NET 5). Now we can use the same controller to expose as an web-api endpoint and for returning the MVC views as well. As these are using the same framework now, all the features available with MVC can be seamlessly used with web api as well and vice versa.  Let’s have a pictorial look

Earlier versions of ASP.NET

All the MVC controllers are derived from Controller class under the name space System.Web.Mvc.

ControllersEarlier Continue reading →