frodovdr/node-red
1
0
Fork 0
mirror of https://github.com/node-red/node-red.git synced 2025-03-01 10:36:34 +00:00
Code Issues Packages Projects Releases Wiki Activity

Allow nodes types to initialise asynchronously at start

Browse Source 
The code scans the flows that are to be started and checks all
of the necessary node types are registered; if not, it doesn't
start the flows.

An event is emitted when each node type is registered - allowing
the server to track when all of the 'missing' node types register
and then start the flows.

This is a step towards adding node-types without restarting.
This commit is contained in:
Nicholas O'Leary
2013-09-18 21:12:59 +01:00
parent 0878071a91
commit 3b22b585d0
2 changed files with 54 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
red/nodes.js
View File

@@ -98,6 +98,7 @@ var node_type_registry = (function() {
if (! node_configs[configFilename]) {
node_configs[configFilename] = fs.readFileSync(configFilename,'utf8');
}
events.emit("type-registered",type);
} else {
util.log("["+type+"] missing template file: "+configFilename);
}
@@ -106,9 +107,6 @@ var node_type_registry = (function() {
get: function(type) {
return node_types[type];
},
registerNodeConfig: function(type,config) {
node_configs[type] = config;
},
getNodeConfigs: function() {
var result = "";
for (var nt in node_configs) {
@@ -256,33 +254,75 @@ module.exports.load = function() {
loadNodes("nodes");
events.emit("nodes-loaded");
//events.emit("nodes-loaded");
}
var activeConfig = null;
var missingTypes = [];
events.on('type-registered',function(type) {
if (missingTypes.length > 0) {
var i = missingTypes.indexOf(type);
if (i != -1) {
missingTypes.splice(i,1);
util.log("[red] Missing type registered: "+type);
}
if (missingTypes.length == 0) {
parseConfig();
}
}
});
module.exports.getNode = function(nid) {
return registry.get(nid);
}
module.exports.parseConfig = function(conf) {
module.exports.setConfig = function(conf) {
if (activeConfig&&activeConfig.length > 0) {
util.log("[red] Stopping flows");
}
registry.clear();
activeConfig = conf;
parseConfig();
}
var parseConfig = function() {
missingTypes = [];
for (var i in activeConfig) {
var type = activeConfig[i].type;
var nt = node_type_registry.get(type);
if (!nt && missingTypes.indexOf(type) == -1) {
missingTypes.push(type);
}
};
if (missingTypes.length > 0) {
util.log("[red] Waiting for missing types to be registered:");
for (var i in missingTypes) {
util.log("[red] - "+missingTypes[i]);
}
return;
}
util.log("[red] Starting flows");
events.emit("nodes-starting");
for (var i in conf) {
for (var i in activeConfig) {
var nn = null;
var nt = node_type_registry.get(conf[i].type);
var nt = node_type_registry.get(activeConfig[i].type);
if (nt) {
try {
nn = new nt(conf[i]);
nn = new nt(activeConfig[i]);
}
catch (err) {
util.log("[red] "+conf[i].type+" : "+err);
util.log("[red] "+activeConfig[i].type+" : "+err);
}
}
// console.log(nn);
if (nn == null) {
util.log("[red] unknown type: "+conf[i].type);
util.log("[red] unknown type: "+activeConfig[i].type);
}
}

7
red/server.js
View File

@@ -60,7 +60,7 @@ function createServer(_server,settings) {
if(err) {
util.log(err);
} else {
redNodes.parseConfig(JSON.parse(fullBody));
redNodes.setConfig(JSON.parse(fullBody));
}
});
});
@@ -79,13 +79,12 @@ function createServer(_server,settings) {
util.log('or any other errors are resolved');
util.log("------------------------------------------");
util.log("[red] Loading workspace flow : "+rulesfile);
fs.exists(rulesfile, function (exists) {
if (exists) {
util.log("[red] Loading workspace flow : "+rulesfile);
fs.readFile(rulesfile,'utf8',function(err,data) {
redNodes.parseConfig(JSON.parse(data));
redNodes.setConfig(JSON.parse(data));
});
}
});