faktory-worker
Version:
A faktory worker framework for node apps
177 lines (176 loc) • 6.67 kB
JavaScript
"use strict";
/**
* An RFC3339-format datetime string
* @typedef RFC3339_DateTime
* @type {string}
* @example
* "2002-10-02T10:00:00-05:00"
* "2002-10-02T15:00:00Z"
* "2002-10-02T15:00:00.05Z"
*
* new Date().toISOString();
* // => '2019-02-11T15:59:15.593Z'
*/
Object.defineProperty(exports, "__esModule", { value: true });
/**
* An after-connect initial message from the server to handshake the connection
* @typedef HI
* @type {object}
* @property {number} v faktory server protocol version number
* @property {number} i only present when password is required. number of password hash iterations.
* see {@link HELLO}.
* @property {string} s only present when password is required. salt for password hashing.
* see {@link HELLO}.
* @see HELLO
*/
/**
* A function that executes work
*
* @typedef JobFunction
* @type {function}
* @param {...*} args arguments from the job payload
* @example
* function(...args) {
* // does something meaningful
* }
*/
/**
* Discriminator used by a worker to decide how to execute a job. This will be the name you
* used during register.
* @typedef Jobtype
* @type {string}
* @global
* @example
* // where `MyFunction` is the jobtype
*
* faktory.register('MyFunction', () => {})
* @see {@link https://github.com/contribsys/faktory/wiki/The-Job-Payload}
*/
/**
* A function that executes work
*
* @typedef {Function} JobFunction
* @param {...*} args arguments from the job payload
* @example
* function(...args) {
* // does something meaningful
* }
*/
/**
* A lookup table holding the jobtype constants mapped to their job functions
*
* @typedef Registry
* @type {Object.<Jobtype, JobFunction>}
* @see Jobtype
* @see JobFunction
* @example
* {
* SendWelcomeUser: (id) => {
* // job fn
* },
* GenerateThumbnail: (id, size) => {
* // job fn
* }
* }
*/
/**
* A function returned by a job function that will be called with the job context as its
* only argument and awaited. This exists to allow you to define simple job functions that
* only accept their job args, but in many cases you might need the job's custom properties
* or stateful connections (like a database connection) in your job and want to attach
* a connection for your job function to use without having to create it itself.
*
* @typedef ContextProvider
* @type {function}
* @param {object} ctx context object containing the job and any other data attached
* via userland-middleware
* @example
* // assumes you have middleware that attaches `db` to `ctx`
*
* faktory.register('UserWelcomer', (...args) => async (ctx) => {
* const [ id ] = args;
* const user = await ctx.db.users.find(id);
* const email = new WelcomeEmail(user);
* await email.deliver();
* });
* @see Context
*/
/**
* A context object passed through middleware and to a job thunk
*
* @typedef Context
* @type {object}
* @property {object} Context.job the job payload
* @property {function} Context.fn a reference to the job function
*/
/**
* A function returned by a job function that will be called with the job context as its
* only argument and awaited. This exists to allow you to define simple job functions that
* only accept their job args, but in many cases you might need the job's custom properties
* or stateful connections (like a database connection) in your job and want to attach
* a connection for your job function to use without having to create it itself.
*
* @typedef ContextProvider
* @type {function}
* @param {object} ctx context object containing the job and any other data attached
* via userland-middleware
* @example
* // assumes you have middleware that attaches `db` to `ctx`
*
* faktory.register('UserWelcomer', (...args) => async (ctx) => {
* const [ id ] = args;
* const user = await ctx.db.users.find(id);
* const email = new WelcomeEmail(user);
* await email.deliver();
* });
* @see Context
*/
/**
* The client's response to the server's {@link HI} to initiate a connection
*
* @typedef {object} HELLO
* @property {string} v the faktory client protocol version
* @property {string} hostname name of the host that is running this worker
* @property {string} wid globally unique identifier for this worker
* @property {number} pid local process identifier for this worker on its host
* @property {string[]} labels labels that apply to this worker, to allow producers to target work
* units to worker types.
* @property {string} pwdhash This field should be the hexadecimal representation of the ith
* SHA256 hash of the client password concatenated with the value in s.
* @see HI
* @see {@link https://github.com/contribsys/faktory/blob/master/docs/protocol-specification.md|Faktory Protocol Specification}
*/
/**
* A work unit that can be scheduled by the faktory work server and executed by clients
*
* @typedef {Object} JobPayload
* @global
* @property {string} [jid=uuid()] globally unique ID for the job.
* @property {Jobtype} jobtype
* @property {string} [queue=default] which job queue to push this job onto.
* @property {array} [args=[]] parameters the worker should use when executing the job.
* @property {number} [priority=5] higher priority jobs are dequeued before lower priority jobs.
* @property {number} [retry=25] number of times to retry this job if it fails. 0 discards the
* failed job, -1 saves the failed job to the dead set.
* @property {RFC3339_DateTime} [at] run the job at approximately this time; immediately if blank
* @property {number} [reserve_for=1800] number of seconds a job may be held by a worker before it
* is considered failed.
* @property {?object} custom provides additional context to the worker executing the job.
* @see {@link https://github.com/contribsys/faktory/wiki/The-Job-Payload}
* @see {@link https://github.com/contribsys/faktory/blob/master/docs/protocol-specification.md#work-units|Faktory Protocol Specification - Work Units}
*/
/**
* A lookup table holding the jobtype constants mapped to their job functions
*
* @typedef {Object} RejectedJobFromPushBulk
* @property {string} reason server-provided reason for the job failing to enqueue.
* @property {JobPayload} jobPayload the job payload that failed to enqueue.
* @see JobPayload
*/
/**
* A lookup table holding the jobtype constants mapped to their job functions
*
* @typedef {Array} RejectedJobsFromPushBulk
* @see RejectedJobFromPushBulk
* @see JobPayload
*/