Poll for async resources with an evented interface
$ npm install --save pole
var poll = require('pole')
var user = pole(function (callback) {
getUser(callback)
})
user.onData(console.log)
user.onError(console.error)
user.cancel()
//=> stop polling and ignore any pending responsesReturns a polling interface.
Calls listener when the polling request suceeded with the yielded value. Returns an unlisten function.
Calls listener when the polling request fails with the yielded error. Returns an unlisten function.
Stops the polling loop and ignores any pending responses.
Type: object
Type: number / function
Default: 0
The interval in milliseconds between successful requests. This parameter can optionally be a function that will be called when data arrives and should return the interval as a number.
Type: number
Default: 1000
The interval in milliseconds between retries after failure. Retries are performed using exponential backoff. Given a retryDelay of 1000, the first retry will be performed after 1 second, then 2, then 4, etc.
Type: number
Default: 30000
The maximum interval in milliseconds between retries.
Type: number
Default: 5
The number of attempts in total to make, including an initial attempt and maxAttempts - 1 retries with backoff.
Type: function
Arguments: callback<err, data>
A function that will be called with a polling handler. callback is a Node errback.
MIT © Ben Drucker