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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | 1x 1x 1x 9x 9x 5x 5x 5x 2x 1x | const precond = require('precond')
const humanInterval = require('human-interval')
const HealthStrategy = require('../strategy')
/**
* Ping an adapter to test a connection
* @class
* @extends HealthStrategy
*/
class PingStrategy extends HealthStrategy {
constructor (adapter, { timeout } = {}) {
super(timeout)
this.adapter = adapter
}
/**
* @param {String} url The connection url
* @param {String} timeout How long to wait until giving up on a connection attempt
* @return {Promise}
*/
check (url, timeout = this.timeout) {
const connectTimeoutMS = humanInterval(timeout)
precond.checkIsNumber(
connectTimeoutMS,
'An invalid format was used for Ping Interval, check human-interval for examples'
)
return this.adapter.ping(url, connectTimeoutMS)
}
/**
* Destroys the connection
*/
cleanup () {
return this.adapter.close()
}
}
module.exports = PingStrategy
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