mirror of
https://github.com/node-red/node-red.git
synced 2023-10-10 13:36:53 +02:00
560 lines
20 KiB
JavaScript
560 lines
20 KiB
JavaScript
/**
|
|
* Copyright JS Foundation and other contributors, http://js.foundation
|
|
*
|
|
* 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 clone = require("clone");
|
|
var redUtil = require("@node-red/util").util;
|
|
var flowUtil = require("./util");
|
|
var events = require("../../events");
|
|
|
|
var Subflow;
|
|
var Log;
|
|
|
|
var nodeCloseTimeout = 15000;
|
|
|
|
/**
|
|
* This class represents a flow within the runtime. It is responsible for
|
|
* creating, starting and stopping all nodes within the flow.
|
|
*/
|
|
class Flow {
|
|
|
|
/**
|
|
* Create a Flow object.
|
|
* @param {[type]} parent The parent flow
|
|
* @param {[type]} globalFlow The global flow definition
|
|
* @param {[type]} flow This flow's definition
|
|
*/
|
|
constructor(parent,globalFlow,flow) {
|
|
this.TYPE = 'flow';
|
|
this.parent = parent;
|
|
this.global = globalFlow;
|
|
if (typeof flow === 'undefined') {
|
|
this.flow = globalFlow;
|
|
this.isGlobalFlow = true;
|
|
} else {
|
|
this.flow = flow;
|
|
this.isGlobalFlow = false;
|
|
}
|
|
this.id = this.flow.id || "global";
|
|
this.activeNodes = {};
|
|
this.subflowInstanceNodes = {};
|
|
this.catchNodes = [];
|
|
this.statusNodes = [];
|
|
}
|
|
|
|
/**
|
|
* Log a debug-level message from this flow
|
|
* @param {[type]} msg [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
debug(msg) {
|
|
Log.log({
|
|
id: this.id||"global",
|
|
level: Log.DEBUG,
|
|
type:this.TYPE,
|
|
msg:msg
|
|
})
|
|
}
|
|
|
|
/**
|
|
* Log an error-level message from this flow
|
|
* @param {[type]} msg [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
error(msg) {
|
|
Log.log({
|
|
id: this.id||"global",
|
|
level: Log.ERROR,
|
|
type:this.TYPE,
|
|
msg:msg
|
|
})
|
|
}
|
|
|
|
/**
|
|
* Log a info-level message from this flow
|
|
* @param {[type]} msg [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
log(msg) {
|
|
Log.log({
|
|
id: this.id||"global",
|
|
level: Log.INFO,
|
|
type:this.TYPE,
|
|
msg:msg
|
|
})
|
|
}
|
|
|
|
/**
|
|
* Log a trace-level message from this flow
|
|
* @param {[type]} msg [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
trace(msg) {
|
|
Log.log({
|
|
id: this.id||"global",
|
|
level: Log.TRACE,
|
|
type:this.TYPE,
|
|
msg:msg
|
|
})
|
|
}
|
|
|
|
|
|
/**
|
|
* Start this flow.
|
|
* The `diff` argument helps define what needs to be started in the case
|
|
* of a modified-nodes/flows type deploy.
|
|
* @param {[type]} msg [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
start(diff) {
|
|
this.trace("start "+this.TYPE);
|
|
var node;
|
|
var newNode;
|
|
var id;
|
|
this.catchNodes = [];
|
|
this.statusNodes = [];
|
|
|
|
var configNodes = Object.keys(this.flow.configs);
|
|
var configNodeAttempts = {};
|
|
while (configNodes.length > 0) {
|
|
id = configNodes.shift();
|
|
node = this.flow.configs[id];
|
|
if (!this.activeNodes[id]) {
|
|
var readyToCreate = true;
|
|
// This node doesn't exist.
|
|
// Check it doesn't reference another non-existent config node
|
|
for (var prop in node) {
|
|
if (node.hasOwnProperty(prop) && prop !== 'id' && prop !== 'wires' && prop !== '_users' && this.flow.configs[node[prop]]) {
|
|
if (!this.activeNodes[node[prop]]) {
|
|
// References a non-existent config node
|
|
// Add it to the back of the list to try again later
|
|
configNodes.push(id);
|
|
configNodeAttempts[id] = (configNodeAttempts[id]||0)+1;
|
|
if (configNodeAttempts[id] === 100) {
|
|
throw new Error("Circular config node dependency detected: "+id);
|
|
}
|
|
readyToCreate = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (readyToCreate) {
|
|
newNode = flowUtil.createNode(this,node);
|
|
if (newNode) {
|
|
this.activeNodes[id] = newNode;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (diff && diff.rewired) {
|
|
for (var j=0;j<diff.rewired.length;j++) {
|
|
var rewireNode = this.activeNodes[diff.rewired[j]];
|
|
if (rewireNode) {
|
|
rewireNode.updateWires(this.flow.nodes[rewireNode.id].wires);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (id in this.flow.nodes) {
|
|
if (this.flow.nodes.hasOwnProperty(id)) {
|
|
node = this.flow.nodes[id];
|
|
if (!node.subflow) {
|
|
if (!this.activeNodes[id]) {
|
|
newNode = flowUtil.createNode(this,node);
|
|
if (newNode) {
|
|
this.activeNodes[id] = newNode;
|
|
}
|
|
}
|
|
} else {
|
|
if (!this.subflowInstanceNodes[id]) {
|
|
try {
|
|
var subflowDefinition = this.flow.subflows[node.subflow]||this.global.subflows[node.subflow]
|
|
// console.log("NEED TO CREATE A SUBFLOW",id,node.subflow);
|
|
this.subflowInstanceNodes[id] = true;
|
|
var subflow = Subflow.create(
|
|
this,
|
|
this.global,
|
|
subflowDefinition,
|
|
node
|
|
);
|
|
this.subflowInstanceNodes[id] = subflow;
|
|
subflow.start();
|
|
this.activeNodes[id] = subflow.node;
|
|
|
|
// this.subflowInstanceNodes[id] = nodes.map(function(n) { return n.id});
|
|
// for (var i=0;i<nodes.length;i++) {
|
|
// if (nodes[i]) {
|
|
// this.activeNodes[nodes[i].id] = nodes[i];
|
|
// }
|
|
// }
|
|
} catch(err) {
|
|
console.log(err.stack)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
var activeCount = Object.keys(this.activeNodes).length;
|
|
if (activeCount > 0) {
|
|
this.trace("------------------|--------------|-----------------");
|
|
this.trace(" id | type | alias");
|
|
this.trace("------------------|--------------|-----------------");
|
|
}
|
|
// Build the map of catch/status nodes.
|
|
for (id in this.activeNodes) {
|
|
if (this.activeNodes.hasOwnProperty(id)) {
|
|
node = this.activeNodes[id];
|
|
this.trace(" "+id.padEnd(16)+" | "+node.type.padEnd(12)+" | "+(node._alias||""));
|
|
if (node.type === "catch") {
|
|
this.catchNodes.push(node);
|
|
} else if (node.type === "status") {
|
|
this.statusNodes.push(node);
|
|
}
|
|
}
|
|
}
|
|
this.catchNodes.sort(function(A,B) {
|
|
if (A.scope && !B.scope) {
|
|
return -1;
|
|
} else if (!A.scope && B.scope) {
|
|
return 1;
|
|
} else if (A.scope && B.scope) {
|
|
return 0;
|
|
} else if (A.uncaught && !B.uncaught) {
|
|
return 1;
|
|
} else if (!A.uncaught && B.uncaught) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
});
|
|
|
|
if (activeCount > 0) {
|
|
this.trace("------------------|--------------|-----------------");
|
|
}
|
|
// this.dump();
|
|
}
|
|
|
|
/**
|
|
* Stop this flow.
|
|
* The `stopList` argument helps define what needs to be stopped in the case
|
|
* of a modified-nodes/flows type deploy.
|
|
* @param {[type]} stopList [description]
|
|
* @param {[type]} removedList [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
stop(stopList, removedList) {
|
|
this.trace("stop "+this.TYPE);
|
|
var i;
|
|
if (!stopList) {
|
|
stopList = Object.keys(this.activeNodes);
|
|
}
|
|
// this.trace(" stopList: "+stopList.join(","))
|
|
// Convert the list to a map to avoid multiple scans of the list
|
|
var removedMap = {};
|
|
removedList = removedList || [];
|
|
removedList.forEach(function(id) {
|
|
removedMap[id] = true;
|
|
});
|
|
|
|
var promises = [];
|
|
for (i=0;i<stopList.length;i++) {
|
|
var node = this.activeNodes[stopList[i]];
|
|
if (node) {
|
|
delete this.activeNodes[stopList[i]];
|
|
if (this.subflowInstanceNodes[stopList[i]]) {
|
|
try {
|
|
(function(subflow) {
|
|
promises.push(stopNode(node,false).then(() => { subflow.stop() }));
|
|
})(this.subflowInstanceNodes[stopList[i]]);
|
|
} catch(err) {
|
|
node.error(err);
|
|
}
|
|
delete this.subflowInstanceNodes[stopList[i]];
|
|
} else {
|
|
try {
|
|
var removed = removedMap[stopList[i]];
|
|
promises.push(stopNode(node,removed).catch(()=>{}));
|
|
} catch(err) {
|
|
node.error(err);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return Promise.all(promises);
|
|
}
|
|
|
|
/**
|
|
* Update the flow definition. This doesn't change anything that is running.
|
|
* This should be called after `stop` and before `start`.
|
|
* @param {[type]} _global [description]
|
|
* @param {[type]} _flow [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
update(_global,_flow) {
|
|
this.global = _global;
|
|
this.flow = _flow;
|
|
}
|
|
|
|
/**
|
|
* Get a node instance from this flow. If the node is not known to this
|
|
* flow, pass the request up to the parent.
|
|
* @param {String} id [description]
|
|
* @param {Boolean} cancelBubble if true, prevents the flow from passing the request to the parent
|
|
* This stops infinite loops when the parent asked this Flow for the
|
|
* node to begin with.
|
|
* @return {[type]} [description]
|
|
*/
|
|
getNode(id, cancelBubble) {
|
|
if (!id) {
|
|
return undefined;
|
|
}
|
|
// console.log((new Error().stack).toString().split("\n").slice(1,3).join("\n"))
|
|
if ((this.flow.configs && this.flow.configs[id]) || (this.flow.nodes && this.flow.nodes[id])) {
|
|
// This is a node owned by this flow, so return whatever we have got
|
|
// During a stop/restart, activeNodes could be null for this id
|
|
return this.activeNodes[id];
|
|
} else if (this.activeNodes[id]) {
|
|
// TEMP: this is a subflow internal node within this flow
|
|
return this.activeNodes[id];
|
|
} else if (cancelBubble) {
|
|
// The node could be inside one of this flow's subflows
|
|
var node;
|
|
for (var sfId in this.subflowInstanceNodes) {
|
|
if (this.subflowInstanceNodes.hasOwnProperty(sfId)) {
|
|
node = this.subflowInstanceNodes[sfId].getNode(id,cancelBubble);
|
|
if (node) {
|
|
return node;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// Node not found inside this flow - ask the parent
|
|
return this.parent.getNode(id);
|
|
}
|
|
return undefined;
|
|
}
|
|
|
|
/**
|
|
* Get all of the nodes instantiated within this flow
|
|
* @return {[type]} [description]
|
|
*/
|
|
getActiveNodes() {
|
|
return this.activeNodes;
|
|
}
|
|
|
|
/**
|
|
* Get a flow setting value. This currently automatically defers to the parent
|
|
* flow which, as defined in ./index.js returns `process.env[key]`.
|
|
* This lays the groundwork for Subflow to have instance-specific settings
|
|
* @param {[type]} key [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
getSetting(key) {
|
|
return this.parent.getSetting(key);
|
|
}
|
|
|
|
/**
|
|
* Handle a status event from a node within this flow.
|
|
* @param {Node} node The original node that triggered the event
|
|
* @param {Object} statusMessage The status object
|
|
* @param {Node} reportingNode The node emitting the status event.
|
|
* This could be a subflow instance node when the status
|
|
* is being delegated up.
|
|
* @param {boolean} muteStatusEvent Whether to emit the status event
|
|
* @return {[type]} [description]
|
|
*/
|
|
handleStatus(node,statusMessage,reportingNode,muteStatusEvent) {
|
|
if (!reportingNode) {
|
|
reportingNode = node;
|
|
}
|
|
if (!muteStatusEvent) {
|
|
events.emit("node-status",{
|
|
id: node.id,
|
|
status:statusMessage
|
|
});
|
|
}
|
|
|
|
let handled = false;
|
|
|
|
if (this.id === 'global' && node.users) {
|
|
// This is a global config node
|
|
// Delegate status to any nodes using this config node
|
|
for (let userNode in node.users) {
|
|
if (node.users.hasOwnProperty(userNode)) {
|
|
node.users[userNode]._flow.handleStatus(node,statusMessage,node.users[userNode],true);
|
|
}
|
|
}
|
|
handled = true;
|
|
} else {
|
|
this.statusNodes.forEach(function(targetStatusNode) {
|
|
if (targetStatusNode.scope && targetStatusNode.scope.indexOf(reportingNode.id) === -1) {
|
|
return;
|
|
}
|
|
var message = {
|
|
status: clone(statusMessage)
|
|
}
|
|
if (statusMessage.hasOwnProperty("text")) {
|
|
message.status.text = statusMessage.text.toString();
|
|
}
|
|
message.status.source = {
|
|
id: node.id,
|
|
type: node.type,
|
|
name: node.name
|
|
}
|
|
|
|
targetStatusNode.receive(message);
|
|
handled = true;
|
|
});
|
|
}
|
|
return handled;
|
|
}
|
|
|
|
/**
|
|
* Handle an error event from a node within this flow. If there are no Catch
|
|
* nodes within this flow, pass the event to the parent flow.
|
|
* @param {[type]} node [description]
|
|
* @param {[type]} logMessage [description]
|
|
* @param {[type]} msg [description]
|
|
* @param {[type]} reportingNode [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
handleError(node,logMessage,msg,reportingNode) {
|
|
if (!reportingNode) {
|
|
reportingNode = node;
|
|
}
|
|
// console.log("HE",logMessage);
|
|
var count = 1;
|
|
if (msg && msg.hasOwnProperty("error") && msg.error !== null) {
|
|
if (msg.error.hasOwnProperty("source") && msg.error.source !== null) {
|
|
if (msg.error.source.id === node.id) {
|
|
count = msg.error.source.count+1;
|
|
if (count === 10) {
|
|
node.warn(Log._("nodes.flow.error-loop"));
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
let handled = false;
|
|
|
|
if (this.id === 'global' && node.users) {
|
|
// This is a global config node
|
|
// Delegate status to any nodes using this config node
|
|
for (let userNode in node.users) {
|
|
if (node.users.hasOwnProperty(userNode)) {
|
|
node.users[userNode]._flow.handleError(node,logMessage,msg,node.users[userNode]);
|
|
}
|
|
}
|
|
handled = true;
|
|
} else {
|
|
var handledByUncaught = false;
|
|
|
|
this.catchNodes.forEach(function(targetCatchNode) {
|
|
if (targetCatchNode.scope && targetCatchNode.scope.indexOf(reportingNode.id) === -1) {
|
|
return;
|
|
}
|
|
if (!targetCatchNode.scope && targetCatchNode.uncaught && !handledByUncaught) {
|
|
if (handled) {
|
|
// This has been handled by a !uncaught catch node
|
|
return;
|
|
}
|
|
// This is an uncaught error
|
|
handledByUncaught = true;
|
|
}
|
|
var errorMessage;
|
|
if (msg) {
|
|
errorMessage = redUtil.cloneMessage(msg);
|
|
} else {
|
|
errorMessage = {};
|
|
}
|
|
if (errorMessage.hasOwnProperty("error")) {
|
|
errorMessage._error = errorMessage.error;
|
|
}
|
|
errorMessage.error = {
|
|
message: logMessage.toString(),
|
|
source: {
|
|
id: node.id,
|
|
type: node.type,
|
|
name: node.name,
|
|
count: count
|
|
}
|
|
};
|
|
if (logMessage.hasOwnProperty('stack')) {
|
|
errorMessage.error.stack = logMessage.stack;
|
|
}
|
|
targetCatchNode.receive(errorMessage);
|
|
handled = true;
|
|
});
|
|
}
|
|
return handled;
|
|
}
|
|
|
|
dump() {
|
|
console.log("==================")
|
|
console.log(this.TYPE, this.id);
|
|
for (var id in this.activeNodes) {
|
|
if (this.activeNodes.hasOwnProperty(id)) {
|
|
var node = this.activeNodes[id];
|
|
console.log(" ",id.padEnd(16),node.type)
|
|
if (node.wires) {
|
|
console.log(" -> ",node.wires)
|
|
}
|
|
}
|
|
}
|
|
console.log("==================")
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Stop an individual node within this flow.
|
|
*
|
|
* @param {[type]} node [description]
|
|
* @param {[type]} removed [description]
|
|
* @return {[type]} [description]
|
|
*/
|
|
function stopNode(node,removed) {
|
|
Log.trace("Stopping node "+node.type+":"+node.id+(removed?" removed":""));
|
|
const start = Date.now();
|
|
const closePromise = node.close(removed);
|
|
const closeTimeout = new Promise((resolve,reject) => {
|
|
setTimeout(() => {
|
|
reject("Close timed out");
|
|
}, nodeCloseTimeout);
|
|
});
|
|
return Promise.race([closePromise,closeTimeout]).then(() => {
|
|
var delta = Date.now() - start;
|
|
Log.trace("Stopped node "+node.type+":"+node.id+" ("+delta+"ms)" );
|
|
}).catch(err => {
|
|
node.error(Log._("nodes.flows.stopping-error",{message:err}));
|
|
Log.debug(err.stack);
|
|
})
|
|
}
|
|
|
|
|
|
module.exports = {
|
|
init: function(runtime) {
|
|
nodeCloseTimeout = runtime.settings.nodeCloseTimeout || 15000;
|
|
Log = runtime.log;
|
|
Subflow = require("./Subflow");
|
|
Subflow.init(runtime);
|
|
},
|
|
create: function(parent,global,conf) {
|
|
return new Flow(parent,global,conf);
|
|
},
|
|
Flow: Flow
|
|
}
|