12/24/2023 0 Comments Nodejs process![]() If you would like to know how to create applications with the Express framework, check out my Node.js TypeScript Express tutorial. While we don’t create any particular web application here, we learn how Node.js handles files and server connections what might prove to be helpful in many situations. In this article, we create a script that can create and read files based on arguments passed when executing it. In general, in this series, we focus on the environment of Node.js and not the JavaScript itself, while having the advantages of static typing using TypeScript. It includes matters like the File System, Event Loop, and the Worker Threads. In this series, we go through the core concepts of Node.js. Measuring processes & worker threads with Performance Hooks Introduction to Worker Threads with TypeScript Harnessing the power of many processes using a cluster Is Node.js single-threaded? Creating child processes Implementing HTTPS with our own OpenSSL certificate Sending HTTP requests, understanding multipart/form-data Writable streams, pipes, and the process streams ![]() Paused and flowing modes of a readable stream The synchronous nature of the EventEmitter Modules, process arguments, basics of the File System const ) process.This entry is part 1 of 15 in the Node.js TypeScript Whenever a piece of data is ready to be sent back as a response, it will be passed to the standard output stream, and if there’s an error while running the command it will be passed to the standard error stream. This means that it’s purely going to be asynchronous, so it’s not going to block the event loop. After running the command, the data that gets returned for that command will be in the form of streams. The spawn function will run a command in a process. There are essentially 3 functions in the child process module that’ll help us create child processes. The child process module in nodeJS lets you offload these heavy tasks to sub-processes which in turn keeps your main thread free. So when a process is executed and there’s a task that’s going to take some time to run, it’s better to move the task aside from the main thread to avoid any blockages. Now that we know what a process is, let's jump into child processes. You can take a look at all the properties present inside the process object. This object has details related to the application, the operating system, the device, and much more. It’s globally available so you don’t have to require it manually before using it. You can access this process information by using the process object. Similarly, an application created in node JS will also have a process when it’s executed. Opening up your browser or turning on Spotify invokes a process for that program. It’s an instance of the program you run on a system. Firstly, what is a process?Ī “Process” is not necessarily a node-specific concept. You can also watch the video version of this tutorial over here. This can be achieved with child processes which is what we’ll be looking at in this blog post. Tasks like these need to be offloaded to keep the main thread free. Now if there’s a synchronous block in the thread or a CPU-intensive operation like encryption/decryption using crypto, it’s going to block further execution. A Node.js program execution takes place one line at a time, from top to bottom( single-threaded).
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