/
index.js
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/
index.js
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/* Copyright (c) 2014-2015 Richard Rodger, MIT License */
'use strict'
var _ = require('lodash')
var fivebeans = require('fivebeans')
var nid = require('nid')
module.exports = function (options) {
var seneca = this
var plugin = 'beanstalk-transport'
var so = seneca.options()
options = seneca.util.deepextend(
{
beanstalk: {
timeout: so.timeout ? so.timeout - 555 : 22222,
type: 'beanstalk',
alivetime: 111,
priority: 100,
delay: 0,
port: 11300,
host: 'localhost'
}
},
so.transport,
options)
var tu = seneca.export('transport/utils')
seneca.add({role: 'transport', hook: 'listen', type: 'beanstalk'},
hook_listen_beanstalk)
seneca.add({role: 'transport', hook: 'client', type: 'beanstalk'},
hook_client_beanstalk)
// Legacy patterns
seneca.add({role: 'transport', hook: 'listen', type: 'queue'}, hook_listen_beanstalk)
seneca.add({role: 'transport', hook: 'client', type: 'queue'}, hook_client_beanstalk)
function make_error_handler (type, tag, instance) {
return function (note, err) {
if (instance.closed$) {
seneca.log.error(type, tag, note, err, 'CLOSED')
} else {
seneca.die(err, 'beanstalk', {type: type, tag: tag, note: note})
}
}
}
function hook_listen_beanstalk (args, done) {
var seneca = this
var type = args.type
var listen_options = seneca.util.clean(_.extend({}, options[type], args))
tu.listen_topics(seneca, args, listen_options, function (topic) {
var beanstalk_out = make_fivebeans(listen_options, 'listen-out')
var out_err = make_error_handler(type, 'listen-out', beanstalk_out)
beanstalk_out
.on('connect', function () {
beanstalk_out.use(topic + '_res', function (err, numwatched) {
if (err) return out_err('use', err)
seneca.log.info('listen', 'connect', 'out', topic,
listen_options, seneca)
})
})
connect_fivebeans(seneca, beanstalk_out, 'listen', 'out',
topic, listen_options, out_err)
var beanstalk_in = make_fivebeans(listen_options, 'listen-in')
var in_err = make_error_handler(type, 'listen-in', beanstalk_in)
beanstalk_in
.on('connect', function () {
var acttopic = topic + '_act'
beanstalk_in.watch(acttopic, function (err, numwatched) {
if (err) return in_err('watch/' + acttopic, err)
function do_reserve () {
if (beanstalk_in.closed$) return
beanstalk_in.reserve(function (err, jobid, payload) {
if (err) return in_err('reserve/' + jobid, err)
var data = tu.parseJSON(seneca, 'listen-' + type, payload)
if (data) {
tu.handle_request(seneca, data, listen_options, function (out) {
if (out == null) return process.nextTick(do_reserve)
var outstr = tu.stringifyJSON(seneca, 'listen-' + type, out)
beanstalk_out.put(
listen_options.priority,
listen_options.delay,
listen_options.alivetime,
outstr,
function (err, outjobid) {
if (err) return out_err('put', err)
beanstalk_in.destroy(jobid, function (err) {
if (err) return in_err('destroy/' + jobid, err)
process.nextTick(do_reserve)
})
})
})
} else {
return process.nextTick(do_reserve)
}
})
}
do_reserve()
})
})
connect_fivebeans(seneca, beanstalk_in, 'listen', 'in',
topic, listen_options, in_err)
})
done()
}
function hook_client_beanstalk (args, clientdone) {
var seneca = this
var type = args.type
var client_options = seneca.util.clean(_.extend({}, options[type], args))
tu.make_client(make_send, client_options, clientdone)
function make_send (spec, topic, send_done) {
var beanstalk_in = make_fivebeans(client_options, 'client-in')
var in_err = make_error_handler(type, 'client-in', beanstalk_in, in_err)
beanstalk_in
.on('connect', function () {
var restopic = topic + '_res'
beanstalk_in.watch(restopic, function (err, numwatched) {
if (err) return in_err('watch/' + restopic, err)
function do_reserve () {
if (beanstalk_in.closed$) return
beanstalk_in.reserve(function (err, jobid, payload) {
if (err) return in_err('reserve/' + jobid, err)
var data = tu.parseJSON(seneca, 'client-' + type, payload)
if (data) {
var complete = tu.handle_response(seneca, data, client_options)
if (complete) {
beanstalk_in.destroy(jobid, function (err) {
if (err) return in_err('destroy/' + jobid, err)
process.nextTick(do_reserve)
})
} else {
beanstalk_in.release(
jobid,
client_options.priority,
client_options.delay,
function (err) {
if (err) return in_err('release/' + jobid, err)
process.nextTick(do_reserve)
})
}
}
else process.nextTick(do_reserve)
})
}
do_reserve()
})
})
connect_fivebeans(seneca, beanstalk_in, 'client', 'in',
topic, client_options, in_err)
var client
var beanstalk_out = make_fivebeans(client_options, 'client-out')
var out_err = make_error_handler(type, 'client-out', beanstalk_in)
beanstalk_out
.on('connect', function () {
var acttopic = topic + '_act'
beanstalk_out.use(acttopic, function (err, numwatched) {
if (err) return out_err('use/' + acttopic, err)
var firsttime = !client
client = function (args, done) {
var outmsg = tu.prepare_request(this, args, done)
var outstr = tu.stringifyJSON(seneca, 'client-beanstalk', outmsg)
try {
beanstalk_out.put(
client_options.priority,
client_options.delay,
client_options.alivetime,
outstr,
function (err, outjobid) {
if (err) return out_err('put/' + outjobid, err)
})
} catch (e) {
if (e) return out_err('put', e)
}
}
client.id$ = nid()
if (firsttime) {
send_done(null, function (args, done) {
client.call(this, args, done)
})
}
})
})
connect_fivebeans(seneca, beanstalk_out, 'client', 'out',
topic, client_options, out_err)
}
}
function make_fivebeans (opts, note) {
var client = new fivebeans.client(opts.host, opts.port) // eslint-disable-line new-cap
client.id$ = nid()
client.note$ = note
return client
}
function connect_fivebeans (seneca, instance, position, direction,
topic, opts, errhandler) {
instance
.on('error', function (err) {
errhandler && errhandler(err)
})
.on('close', function () {
seneca.log.error(position, 'close', direction, topic,
opts, seneca)
})
.connect()
seneca.add('role:seneca,cmd:close', function (close_args, done) {
var closer = this
instance.closed$ = true
instance.end()
closer.prior(close_args, done)
})
}
return {
name: plugin
}
}