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node-red/packages/node_modules/@node-red/runtime/lib/index.js

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/*!
* Copyright JS Foundation and other contributors, http://js.foundation
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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.
**/
var when = require('when');
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var externalAPI = require("./api");
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var redNodes = require("./nodes");
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var storage = require("./storage");
var library = require("./library");
var events = require("./events");
var settings = require("./settings");
var exec = require("./exec");
var express = require("express");
var path = require('path');
var fs = require("fs");
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var os = require("os");
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var redUtil = require("@node-red/util");
var log = redUtil.log;
var i18n = redUtil.i18n;
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var runtimeMetricInterval = null;
var started = false;
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var stubbedExpressApp = {
get: function() {},
post: function() {},
put: function() {},
delete: function() {}
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}
var adminApi = {
auth: {
needsPermission: function() {}
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},
adminApp: stubbedExpressApp,
server: {}
}
var nodeApp;
var server;
/**
* Initialise the runtime module.
* @param {Object} settings - the runtime settings object
* @param {HTTPServer} server - the http server instance for the server to use
* @param {AdminAPI} adminApi - an instance of @node-red/editor-api. <B>TODO</B>: This needs to be
* better abstracted.
* @memberof @node-red/runtime
*/
function init(userSettings,httpServer,_adminApi) {
server = httpServer;
userSettings.version = getVersion();
settings.init(userSettings);
nodeApp = express();
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if (_adminApi) {
adminApi = _adminApi;
}
redNodes.init(runtime);
library.init(runtime);
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externalAPI.init(runtime);
exec.init(runtime);
}
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var version;
function getVersion() {
if (!version) {
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version = require(path.join(__dirname,"..","package.json")).version;
/* istanbul ignore else */
try {
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fs.statSync(path.join(__dirname,"..","..","..","..",".git"));
version += "-git";
} catch(err) {
// No git directory
}
}
return version;
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}
/**
* Start the runtime.
* @return {Promise} - resolves when the runtime is started. This does not mean the
* flows will be running as they are started asynchronously.
* @memberof @node-red/runtime
*/
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function start() {
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return i18n.registerMessageCatalog("runtime",path.resolve(path.join(__dirname,"..","locales")),"runtime.json")
.then(function() { return storage.init(runtime)})
.then(function() { return settings.load(storage)})
.then(function() {
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if (log.metric()) {
runtimeMetricInterval = setInterval(function() {
reportMetrics();
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}, settings.runtimeMetricInterval||15000);
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}
log.info("\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}));
if (settings.UNSUPPORTED_VERSION) {
log.error("*****************************************************************");
log.error("* "+log._("runtime.unsupported_version",{component:"Node.js",version:process.version,requires: ">=4"})+" *");
log.error("*****************************************************************");
events.emit("runtime-event",{id:"runtime-unsupported-version",payload:{type:"error",text:"notification.errors.unsupportedVersion"},retain:true});
}
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log.info(os.type()+" "+os.release()+" "+os.arch()+" "+os.endianness());
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) {
log.warn("------------------------------------------------------");
for (i=0;i<nodeErrors.length;i+=1) {
if (nodeErrors[i].err.code === "type_already_registered") {
log.warn("["+nodeErrors[i].id+"] "+log._("server.type-already-registered",{type:nodeErrors[i].err.details.type,module: nodeErrors[i].err.details.moduleA}));
} else {
log.warn("["+nodeErrors[i].id+"] "+nodeErrors[i].err);
}
}
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]||{
module:missing.module,
version:missing.pending_version||missing.version,
types:[]
}
missingModules[missing.module].types = missingModules[missing.module].types.concat(missing.types);
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}
var moduleList = [];
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var promises = [];
var installingModules = [];
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for (i in missingModules) {
if (missingModules.hasOwnProperty(i)) {
log.warn(" - "+i+" ("+missingModules[i].version+"): "+missingModules[i].types.join(", "));
if (settings.autoInstallModules && i != "node-red") {
installingModules.push({id:i,version:missingModules[i].version});
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}
}
}
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if (!settings.autoInstallModules) {
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log.info(log._("server.removing-modules"));
redNodes.cleanModuleList();
} else if (installingModules.length > 0) {
reinstallAttempts = 0;
reinstallModules(installingModules);
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}
}
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if (settings.settingsFile) {
log.info(log._("runtime.paths.settings",{path:settings.settingsFile}));
}
if (settings.httpStatic) {
log.info(log._("runtime.paths.httpStatic",{path:path.resolve(settings.httpStatic)}));
}
return redNodes.loadContextsPlugin().then(function () {
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redNodes.loadFlows().then(redNodes.startFlows).catch(function(err) {});
started = true;
});
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});
});
}
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var reinstallAttempts;
var reinstallTimeout;
function reinstallModules(moduleList) {
var promises = [];
var failedModules = [];
for (var i=0;i<moduleList.length;i++) {
if (settings.autoInstallModules && i != "node-red") {
promises.push(redNodes.installModule(moduleList[i].id,moduleList[i].version));
}
}
when.settle(promises).then(function(results) {
var reinstallList = [];
for (var i=0;i<results.length;i++) {
if (results[i].state === 'rejected') {
reinstallList.push(moduleList[i]);
} else {
events.emit("runtime-event",{id:"node/added",retain:false,payload:results[i].value.nodes});
}
}
if (reinstallList.length > 0) {
reinstallAttempts++;
// First 5 at 1x timeout, next 5 at 2x, next 5 at 4x, then 8x
var timeout = (settings.autoInstallModulesRetry||30000) * Math.pow(2,Math.min(Math.floor(reinstallAttempts/5),3));
reinstallTimeout = setTimeout(function() {
reinstallModules(reinstallList);
},timeout);
}
});
}
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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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}
/**
* Stops the runtime.
* @return {Promise} - resolves when the runtime is stopped.
* @memberof @node-red/runtime
*/
function stop() {
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if (runtimeMetricInterval) {
clearInterval(runtimeMetricInterval);
runtimeMetricInterval = null;
}
if (reinstallTimeout) {
clearTimeout(reinstallTimeout);
}
started = false;
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return redNodes.stopFlows().then(function(){
return redNodes.closeContextsPlugin();
});
}
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// This is the internal api
var runtime = {
version: getVersion,
get log() { return log },
get i18n() { return i18n },
settings: settings,
storage: storage,
events: events,
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nodes: redNodes,
library: library,
exec: exec,
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util: require("@node-red/util").util,
get adminApi() { return adminApi },
get nodeApp() { return nodeApp },
get server() { return server },
isStarted: function() {
return started;
}
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};
/**
* This module provides the core runtime component of Node-RED.
* It does *not* include the Node-RED editor. All interaction with
* this module is done using the api provided.
*
* @namespace @node-red/runtime
*/
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module.exports = {
init: init,
start: start,
stop: stop,
/**
* @memberof @node-red/runtime
* @mixes @node-red/runtime_comms
*/
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comms: externalAPI.comms,
/**
* @memberof @node-red/runtime
* @mixes @node-red/runtime_flows
*/
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flows: externalAPI.flows,
/**
* @memberof @node-red/runtime
* @mixes @node-red/runtime_library
*/
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library: externalAPI.library,
/**
* @memberof @node-red/runtime
* @mixes @node-red/runtime_nodes
*/
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nodes: externalAPI.nodes,
/**
* @memberof @node-red/runtime
* @mixes @node-red/runtime_settings
*/
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settings: externalAPI.settings,
/**
* @memberof @node-red/runtime
* @mixes @node-red/runtime_projects
*/
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projects: externalAPI.projects,
/**
* @memberof @node-red/runtime
* @mixes @node-red/runtime_context
*/
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context: externalAPI.context,
/**
* Returns whether the runtime is started
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @return {Promise<Boolean>} - whether the runtime is started
* @function
* @memberof @node-red/runtime
*/
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isStarted: externalAPI.isStarted,
/**
* Returns version number of the runtime
* @param {Object} opts
* @param {User} opts.user - the user calling the api
* @return {Promise<String>} - the runtime version number
* @function
* @memberof @node-red/runtime
*/
version: externalAPI.version,
storage: storage,
events: events,
get httpNode() { return nodeApp },
get server() { return server }
}
/**
* A user accessing the API
* @typedef User
* @type {object}
*/