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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,20 +1,263 @@ | ||
| var Nsquishy = require('./lib'); | ||
| var nsq = require('nsqjs'); | ||
| var Wreck = require('wreck'); | ||
| var Utils = require('hoek'); | ||
| var Schema = require('./schema'); | ||
|
|
||
| exports.register = function (server, options, next) { | ||
| // Declare internals | ||
|
|
||
| var nsquishy = new Nsquishy(options); | ||
| nsquishy.squish(function squishCallback (err) { | ||
| var internals = {}; | ||
|
|
||
| // Defaults | ||
|
|
||
| internals.defaults = { | ||
| topic: null, | ||
| channel: null, | ||
| nsqlookupd: [], | ||
| nsqlookupdHttpProtocol: 'http://', | ||
| etcd: null, | ||
| etcdNsqlookupdKey: null, | ||
| nsqdHost: null, | ||
| nsqdPort: null, | ||
| readerOptions: {}, | ||
| writerOptions: {} | ||
| }; | ||
|
|
||
| // Helpers to start and log nsq reader and writer | ||
|
|
||
| nsq.Reader.prototype.init = function (callback) { | ||
|
|
||
| this.connect(); | ||
|
|
||
| this.on('nsqd_connected', function _nsqConect () { | ||
| console.log(['nsq', 'startup'], 'nsq reader connection established'); | ||
| callback(null); | ||
| }); | ||
|
|
||
| this.on('error', function _nsqError (err) { | ||
| throw err; | ||
| }); | ||
|
|
||
| this.on('nsqd_closed', function _nsqClosed () { | ||
| throw new Error('nsqd closed connection'); | ||
| }); | ||
| }; | ||
|
|
||
| nsq.Writer.prototype.init = function (callback) { | ||
|
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| this.connect(); | ||
|
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||
| this.on('ready', function _nsqReady () { | ||
| console.log(['nsq', 'startup'], 'nsq writer connection established'); | ||
| callback(null); | ||
| }); | ||
|
|
||
| this.on('error', function _nsqWriterError (err) { | ||
| throw err; | ||
| }); | ||
|
|
||
| this.on('closed', function _nsqWriterClosed () { | ||
| throw new Error('nsqd closed connection'); | ||
| }); | ||
| }; | ||
|
|
||
| internals.getNsqlookupd = function (settings, cb) { | ||
|
|
||
| // If nsqlookupd registered in etcd | ||
| if (settings.nsqlookupd && settings.nsqlookupd.length === 0 && settings.etcd && settings.etcdNsqlookupdKey) { | ||
|
|
||
| this._url = [settings.etcd, '/v2/keys', settings.etcdNsqlookupdKey].join(''); | ||
|
|
||
| Wreck.get(this._url, function (err, res, payload) { | ||
|
|
||
| if (err) { | ||
| return cb(err); | ||
| } | ||
|
|
||
| var body; | ||
| try { | ||
| body = JSON.parse(payload); | ||
| } | ||
| catch (e) { | ||
| return cb('error parsing etcd payload: ' + e); | ||
| } | ||
|
|
||
| if (!body.node.nodes || body.node.nodes.length === 0) { | ||
| return cb('etcd key not set'); | ||
| } | ||
|
|
||
| var addresses = body.node.nodes.map(function _mapCallback (node) { | ||
| return node.value; | ||
| }); | ||
|
|
||
| cb(null, addresses); | ||
| }); | ||
| } | ||
| else { | ||
|
|
||
| return cb('cannot determine nsqlookupd location'); | ||
| } | ||
| }; | ||
|
|
||
| internals.getNsqd = function (nsqlookupd, settings, cb) { | ||
|
|
||
| // Fetch random nsqd if not specified in setings | ||
|
|
||
| if (!nsqlookupd) { | ||
| throw new Error('nsqlookupd needed to lookup nsqd'); | ||
| } | ||
|
|
||
| var url = internals._urlNsqloolkupdAll = [settings.nsqlookupdHttpProtocol, nsqlookupd, '/nodes'].join(''); | ||
|
|
||
| if (settings.topic) { | ||
| url = [settings.nsqlookupdHttpProtocol, nsqlookupd, '/lookup?topic=', settings.topic].join(''); | ||
| } | ||
|
|
||
| Wreck.get(url, function (err, res, payload) { | ||
|
|
||
| if (err) { | ||
| return next(err); | ||
| return cb(err); | ||
| } | ||
|
|
||
| server.app.nsquishy = nsquishy; | ||
| console.log('server.app.nsquishy: %j', Object.keys(server.app.nsquishy)); | ||
| next(); | ||
| var body; | ||
| try { | ||
| body = JSON.parse(payload); | ||
| } | ||
| catch (e) { | ||
| return cb('error parsing nsqlookupd payload: ' + e); | ||
| } | ||
|
|
||
| // If topic specific nsqd search fails, get a list of all nsqd producers | ||
| if (settings.topic && !body.data || body.data.producers.length === 0) { | ||
| Wreck.get(internals._urlNsqloolkupdAll, function (err, res, payload) { | ||
|
|
||
| if (err) { | ||
| return cb(err); | ||
| } | ||
| var body; | ||
| try { | ||
| body = JSON.parse(payload); | ||
| } | ||
| catch (e) { | ||
| return cb('error parsing nsqlookupd payload: ' + e); | ||
| } | ||
|
|
||
| return cb(null, body.data.producers[Math.floor(Math.random()*body.data.producers.length)]); | ||
| }); | ||
| } | ||
| else { | ||
| // return a random nsqd | ||
| return cb(null, body.data.producers[Math.floor(Math.random()*body.data.producers.length)]); | ||
| } | ||
| }); | ||
| }; | ||
|
|
||
| exports.register.attributes = { | ||
| pkg: require('../package.json') | ||
| function Nsquishy (options) { | ||
|
|
||
| if (!options) { | ||
| throw new Error('Nsquishy must be instantiated with a valid "options" object'); | ||
| } | ||
|
|
||
| var self = this; | ||
|
|
||
| // Init reader and writer | ||
|
|
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| return Schema.validate(options, function (err) { | ||
|
|
||
| if (err) { | ||
| throw err; | ||
| } | ||
|
|
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| self.settings = Utils.applyToDefaults(internals.defaults, options); | ||
| }); | ||
| } | ||
|
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| Nsquishy.prototype.squish = function (next) { | ||
|
|
||
| var settings = this.settings; | ||
| var self = this; | ||
|
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||
| internals.initNsqlookupd = function(addresses, settings, cb) { | ||
|
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| var nsqOptions = {}; | ||
|
|
||
| if (settings.topic && settings.channel) { | ||
| delete settings.readerOptions.nsqdTCPAddresses; | ||
| settings.readerOptions.lookupdHTTPAddresses = addresses; | ||
| self.nsqReader = new nsq.Writer(settings.topic, settings.channel, settings.readerOptions); | ||
| } | ||
| else { | ||
| console.log(['nsq', 'warn'], 'nsq reader not loaded - please set topic and channel to load reader'); | ||
| } | ||
|
|
||
| var address = addresses[Math.floor(Math.random() * addresses.length)]; | ||
|
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| return internals.getNsqd(address, settings, function (err, producer) { | ||
|
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| console.log(['nsq', 'writer'], 'creating writer for: ', producer); | ||
|
|
||
| if (err) { | ||
| return cb(err); | ||
| } | ||
|
|
||
| if (!producer) { | ||
| return cb(new Error('no nsqd instance found')); | ||
| } | ||
|
|
||
| self.nsqWriter = new nsq.Writer(producer.broadcast_address, producer.tcp_port, settings.writerOptions); | ||
|
|
||
| return cb(null); | ||
| }); | ||
| }; | ||
|
|
||
| // if setings.nsqlookups specified as string, convert to array | ||
| if (settings.nsqlookupd && !Array.isArray(settings.nsqlookupd) && settings.nsqlookupd.length !== 0) { | ||
| settings.nsqlookupd = [settings.nsqlookupd]; | ||
| } | ||
|
|
||
| // Use nsqd host if specified | ||
| if (settings.nsqdHost && settings.nsqdPort) { | ||
|
|
||
| if (settings.topic && settings.channel) { | ||
| delete settings.readerOptions.lookupdHTTPAddresses; | ||
| settings.readerOptions.nsqdTCPAddresses = [settings.nsqdHost, settings.nsqdPort].join(':'); | ||
| self.nsqReader = new nsq.Reader(settings.topic, settings.channel, settings.readerOptions); | ||
| } | ||
| else { | ||
| console.log(['nsq', 'warn'], 'nsq reader not loaded - please set topic and channel to load reader'); | ||
| } | ||
| self.nsqWriter = new nsq.Writer(settings.nsqdHost, settings.nsqdPort, settings.writerOptions); | ||
|
|
||
| next(); | ||
| } | ||
|
|
||
| // Use provided nsqdlookupd setting | ||
| else if (settings.nsqlookupd && settings.nsqlookupd.length !== 0) { | ||
| internals.initNsqlookupd(settings.nsqlookupd, settings, function (err) { | ||
|
|
||
| if (err) { | ||
| return next(err); | ||
| } | ||
| next(); | ||
| }); | ||
| } | ||
|
|
||
| //Fetch nsqlookupd host from etcd | ||
| else { | ||
| internals.getNsqlookupd(settings, function (err, address) { | ||
|
|
||
| if (err) { | ||
| return next(err); | ||
| } | ||
|
|
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| internals.initNsqlookupd(address, settings, function (err) { | ||
|
|
||
| if (err) { | ||
| next(err); | ||
| } | ||
| next(); | ||
| }); | ||
| }); | ||
| } | ||
| }; | ||
|
|
||
| module.exports = Nsquishy; |
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