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async-lock

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async-lock

Lock on asynchronous code

  • 1.2.1
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  • npm
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What is async-lock?

The async-lock npm package is designed to handle synchronization issues in Node.js applications where asynchronous operations need to be executed in a controlled sequence. It provides a mechanism to ensure that certain sections of code that should not be executed concurrently can be locked to avoid race conditions and other concurrency-related bugs.

What are async-lock's main functionalities?

Locking asynchronous operations

This feature allows you to lock a section of asynchronous operations using a unique key. The lock ensures that only one block of code that uses the same key can execute at a time, preventing race conditions.

const AsyncLock = require('async-lock');
const lock = new AsyncLock();

lock.acquire('key', function(done) {
  // async work
  setTimeout(function() {
    done(null, 'result');
  }, 1000);
}, function(err, result) {
  console.log(result); // prints 'result' after 1000ms
});

Promise support

Async-lock also supports promises, allowing you to use it in modern asynchronous workflows. This feature simplifies working with asynchronous operations by using promises instead of callbacks.

const AsyncLock = require('async-lock');
const lock = new AsyncLock();

lock.acquire('key', () => {
  return new Promise(resolve => {
    setTimeout(() => {
      resolve('result');
    }, 1000);
  });
}).then(result => {
  console.log(result); // prints 'result' after 1000ms
});

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Package last updated on 13 Jul 2019

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