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node-red/red/server.js

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/**
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* Copyright 2013, 2015 IBM Corp.
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*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
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var express = require('express');
var when = require('when');
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var redNodes = require("./nodes");
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var comms = require("./comms");
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var storage = require("./storage");
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var log = require("./log");
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var i18n = require("./i18n");
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var app = null;
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var nodeApp = null;
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var server = null;
var settings = null;
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var runtimeMetricInterval = null;
function init(_server,_settings) {
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server = _server;
settings = _settings;
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comms.init(_server,_settings);
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nodeApp = express();
app = express();
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}
function start() {
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return i18n.init()
.then(function() { return storage.init(settings)})
.then(function() { return settings.load(storage)})
.then(function() {
if (settings.httpAdminRoot !== false) {
require("./api").init(app,storage);
}
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if (log.metric()) {
runtimeMetricInterval = setInterval(function() {
reportMetrics();
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}, settings.runtimeMetricInterval||15000);
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}
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console.log("\n\n"+log._("runtime.welcome")+"\n===================\n");
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if (settings.version) {
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log.info(log._("runtime.version",{component:"Node-RED",version:"v"+settings.version}));
}
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log.info(log._("runtime.version",{component:"Node.js ",version:process.version}));
log.info(log._("server.loading"));
redNodes.init(settings,storage);
return redNodes.load().then(function() {
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var i;
var nodeErrors = redNodes.getNodeList(function(n) { return n.err!=null;});
var nodeMissing = redNodes.getNodeList(function(n) { return n.module && n.enabled && !n.loaded && !n.err;});
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if (nodeErrors.length > 0) {
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log.warn("------------------------------------------");
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if (settings.verbose) {
for (i=0;i<nodeErrors.length;i+=1) {
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log.warn("["+nodeErrors[i].name+"] "+nodeErrors[i].err);
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}
} else {
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log.warn(log._("server.errors",{count:nodeErrors.length}));
log.warn(log._("server.errors-help"));
}
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log.warn("------------------------------------------");
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}
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if (nodeMissing.length > 0) {
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log.warn(log._("server.missing-modules"));
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var missingModules = {};
for (i=0;i<nodeMissing.length;i++) {
var missing = nodeMissing[i];
missingModules[missing.module] = (missingModules[missing.module]||[]).concat(missing.types);
}
var promises = [];
for (i in missingModules) {
if (missingModules.hasOwnProperty(i)) {
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log.warn(" - "+i+": "+missingModules[i].join(", "));
if (settings.autoInstallModules && i != "node-red") {
redNodes.installModule(i).otherwise(function(err) {
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// Error already reported. Need the otherwise handler
// to stop the error propagating any further
});
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}
}
}
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if (!settings.autoInstallModules) {
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log.info(log._("server.removing-modules"));
redNodes.cleanModuleList();
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}
}
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log.info(log._("runtime.paths.settings",{path:settings.settingsFile}));
redNodes.loadFlows().then(redNodes.startFlows);
comms.start();
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}).otherwise(function(err) {
console.log(err);
});
});
}
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function reportMetrics() {
var memUsage = process.memoryUsage();
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log.log({
level: log.METRIC,
event: "runtime.memory.rss",
value: memUsage.rss
});
log.log({
level: log.METRIC,
event: "runtime.memory.heapTotal",
value: memUsage.heapTotal
});
log.log({
level: log.METRIC,
event: "runtime.memory.heapUsed",
value: memUsage.heapUsed
});
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}
function stop() {
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if (runtimeMetricInterval) {
clearInterval(runtimeMetricInterval);
runtimeMetricInterval = null;
}
redNodes.stopFlows();
comms.stop();
}
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var serverAPI = module.exports = {
init: init,
start: start,
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stop: stop,
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get app() { return app },
get nodeApp() { return nodeApp },
get server() { return server }
}