BusinessHABAsynchronous class: Asynchronous programs are here to stay. They’re particularly well-suited to handling the increased demand that new and more connected devices create. But programming asynchronous code can be challenging, not least because it can be difficult to keep track of when and where a particular activity is taking place.
Fortunately, there are many ways you can optimize your asynchronous classes for better performance and easier maintenance. We discuss several of them in this article.
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6 Ways to Get the Most Out of Asynchronous Classes
Asynchronous programming has taken the software world by storm over the past few years. It’s coming for your job too. In fact, the adoption of asynchronous programming in mobile, desktop and web applications is only going to increase in the coming years.
What is asynchronous programming?
Asynchronous programming is when you call a method asynchronously. This means that the method call does not happen until the method is ready to receive input, at which point the caller block is suspended and the method call is executed. Asynchronous programming is a style of programming that deals with execution of code in parallel, rather than sequentially. It is often used to improve the responsiveness of software by avoiding blocking the UI (and the user) while waiting for a series of asynchronous operations to finish. A method that is asynchronous can return a value (like synchronous programming does), but it can also receive a callback function that is executed when the asynchronous operation finishes.
When to use asynchronous programming?
Asynchronous programming is where the rubber meets the road. It is generally used only when there is a real requirement to perform some work in a non-blocking manner. For example, if you have a long-running operation on a database, or a background task related to a third-party service, then you should consider writing a function that handles the task asynchronously. You will be rewarded with faster, more responsive software. If you’ve got some long-running code that is blocking on a database, or an external service, and you can’t get it moving any faster because of the need to wait for those operations to finish. Asynchronous programming is a great solution for that.
Defining an async function
When you write code that is asynchronous, you often want to wait for results before showing the result to the user. For example, suppose you are building a mobile app that lets users order pizza. When the user orders a pizza, you need to call the pizza shop to make sure that the pizza is ready for pick-up. If the pizza shop gets busy and can’t handle all the orders right away, you need to write code that calls the pizza shop and waits for them to get back to you. When they do, they will give you the information you need to process the order. Most likely, you have written some code to handle the order, perhaps a method or a class, and you have the code that calls the pizza shop to handle the order. You might have some code that handles the response from the pizza shop (e.g., displaying an alert that the order is ready for pick-up).
Avoid Async-Returning Functions
Asynchronous functions are all about handling the result of an operation, and then waiting until that operation is complete. This means that you will need to handle the result of the operation, as well as any error that may arise. The most common situation where you end up writing asynchronous functions is when you are waiting for the result of an asynchronous operation. For example, let’s say you have a function that calls a long-running API that takes some time to complete the call. Now if the API is not responsive, or if there is a network issue and the API takes a long time to return the response, you will likely have a blocking function. The code will say “wait here until the API call is completed.” The most common example of this is when someone is sleeping and you want to wake them up.
Using async/await Keywords
Async/await is a set of keywords that allow you to write asynchronous code that looks like synchronous code. This is possible with the help of the async/await keywords. Async/await allows you to write asynchronous functions that don’t return values, and then waits for the result of the operation to be completed. The code looks almost like a synchronous function with the exception that the call to the asynchronous function is wrapped in an await keyword. The await keyword tells the compiler that the current function is done executing, and the code will wait until the asynchronous function call returns.
Conclusion
Asynchronous programming has taken the software world by storm over the past few years. It’s coming for your job too. In fact, the adoption of asynchronous programming in mobile, desktop and web applications is only going to increase in the coming years. This shift will lead to some big changes in the way we code, and those changes will be for the better. Now is the time to embrace asynchronous programming and create the best, most responsive code possible.
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