seal-droddel

Serialize asynchronous calls.

Installation

$ npm install seal-droddel

Quick start

First you need to add a reference to seal-droddel within your application.

const droddel = require('seal-droddel');

To actually throttle a function, call droddel and hand over the function that shall be throttled.

E.g., if you want to serialize read access to a file, hand over a function that does the actual fs.readFile call and return its result using a callback:

const throttledRead = droddel((callback) => {
  fs.readFile('/etc/passwd', callback);
});

To then read the file, simply call throttledRead:

throttledRead((err, data) => {
  // ...
});

If you call throttledRead while it is already being run, the new call gets delayed.

Referencing this

If you need to access this from within the function that shall be throttled, call the throttledRead function using call and provide the object that you want to use as this.

E.g., if you want to preserve the outer this, simply hand it over:

throttledRead.call(this, (err, data) => {
  // ...
});

Running the build

To build this module use roboter.

$ bot