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worker.js
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worker.js
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var fs = require('fs')
, utils = require('utilities')
, dispatch = require('./worker_dispatch')
, Logger = require('./worker_logger').Logger
, Worker;
Worker = function () {
var self = this;
};
Worker.prototype = new (function () {
this.init = function (afterConfigure) {
var self = this;
this._afterConfigure = function () {
self.createServer();
self.startHeartbeat();
afterConfigure();
};
this.config = {};
this.server = null;
this.log = new Logger(this);
this.addListeners();
};
this.addListeners = function () {
var self = this;
process.addListener('message', function (data) {
self.receiveMessage(data);
});
};
this.createServer = function () {
var ssl = this.config.ssl
, spdy = this.config.spdy;
// If SSL options were given
if (ssl) {
if (ssl.cert && ssl.key) {
this.server = require('https').createServer({
key: fs.readFileSync(ssl.key)
, cert: fs.readFileSync(ssl.cert)
});
}
else {
this.log.error('Cannot start server using SSL.' +
'Missing certificate or private key.');
}
}
// If SPDY options were given
else if (spdy) {
if (spdy.cert && spdy.key) {
this.server = utils.file.requireLocal('spdy').createServer({
key: fs.readFileSync(spdy.key)
, cert: fs.readFileSync(spdy.cert)
});
}
else {
this.log.error('Cannot start server using SPDY.' +
'Missing certificate or private key.');
}
}
// If neither SSL or SPDY options were given use HTTP
else {
this.server = require('http').createServer();
}
};
this.startServer = function () {
if (this.config) {
var hostname = this.config.hostname || null
, ssl = this.config.ssl ? ' (SSL)' : ''
, spdy = this.config.spdy ? '(SPDY)' : '';
this.server.listen(parseInt(this.config.port, 10), hostname);
this.log.info('Server worker running in ' + this.config.environment +
' on port ' + this.config.port + ssl + spdy + ' with a PID of: ' + process.pid);
this.log.debug('LOGGING STARTED ============================================');
this.log.debug('============================================================');
}
else {
this.log.error('Cannot start server without config.');
}
};
this.configure = function (config) {
this.config = config;
this._afterConfigure();
};
this.sendMessage = function (msg) {
process.send(msg);
};
this.receiveMessage = function (msg) {
if (msg && msg.method && dispatch[msg.method]) {
dispatch[msg.method].call(this, msg);
}
};
this.retire = function (msg) {
var self = this;
this.shutDownCleanly(this.rotationTimeout, function () {
self.sendMessage({
workerId: process.pid
, method: 'readyForRetirement'
});
});
};
this.shutdown = function (msg) {
var self = this;
this.shutDownCleanly(this.gracefulShutdownTimeout, function () {
self.sendMessage({
workerId: process.pid
, method: 'readyForShutdown'
});
});
};
this.shutDownCleanly = function (timeout, callback) {
var self = this
, startTime = (new Date()).getTime()
, ready = false;
this.server.addListener('close', function () {
// Poll to see until all in-flight requests complete or
// we pass the timeout window
setInterval(function () {
var count = geddy.inFlight.getCount();
if (count) {
ready = (new Date()).getTime() - startTime > timeout;
if (ready) {
// Unceremoniously end responses in the in-flight registry
geddy.inFlight.each(function (entry) {
try {
if (entry.response) {
entry.response.end();
}
}
// Squelch, the process is going down anyhow
catch(e) {}
});
}
}
else {
ready = true;
}
if (ready) {
callback();
}
}, 2000);
});
try {
// Squelch this too, the process is going down anyhow
this.server.close();
}
catch(e) {} // Squelch this too
};
this.startHeartbeat = function () {
var self = this;
setInterval(function () {
self.sendMessage({
workerId: process.pid.toString()
, method: 'heartbeat'
});
}, self.config.heartbeatInterval);
};
})();
module.exports.Worker = Worker;