Menu
Is there any way to create threads for running multiple methods at a time?
That way, if any method fails in between all the other threads should be killed.
317
Node. js doesn't use threading. According to its inventor that's a key feature.
Node. js is a single-threaded language and uses the multiple threads in the background for certain tasks as I/O calls but it does not expose child threads to the developer. But node. js gives us ways to work around if we really need to do some work parallelly to our main single thread process.
Conclusion. Node. js has two types of threads: one Event Loop and k Workers.
Node.js uses two kinds of threads: a main thread handled by event loop and several auxiliary threads in the worker pool. Event loop is the mechanism that takes callbacks (functions) and registers them to be executed at some point in the future. It operates in the same thread as the proper JavaScript code.
We use the Worker class to create a new worker thread. It accepts the following arguments when creating a new Worker instance. Here, the filename argument refers to the path to the file which contains the code that should be executed by the worker thread. Therefore, we need to pass the file path of the worker.js file.
Use Nodejs multithreading strategies. Although JavaScript code runs in a single thread, its runtime environment can be customized to do multithreading. Here are two recommended ways to achieve the desired effect. The setImmediate API splits the CPU-intensive task into smaller chunks.
Even though Node doesn’t support multithreading in the traditional way, Worker Threads provides a good workaround to this problem. So, if you were under the impression that Node applications can’t have more than one thread, it’s time to bin that notion and give Worker Threads a try.
New answer: While node.js didn't used to have the ability to use threading natively, the ability has since been added. See https://nodejs.org/api/worker_threads.html for details.
Old answer: Every node.js process is single threaded by design. Therefore to get multiple threads, you have to have multiple processes (As some other posters have pointed out, there are also libraries you can link to that will give you the ability to work with threads in Node, but no such capability exists without those libraries. See answer by Shawn Vincent referencing https://github.com/audreyt/node-webworker-threads)
You can start child processes from your main process as shown here in the node.js documentation: http://nodejs.org/api/child_process.html. The examples are pretty good on this page and are pretty straight forward.
Your parent process can then watch for the close event on any process it started and then could force close the other processes you started to achieve the type of one fail all stop strategy you are talking about.
Also see: Node.js on multi-core machines
183
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
