mirror of
https://github.com/node-red/node-red.git
synced 2023-10-10 13:36:53 +02:00
933 lines
34 KiB
JavaScript
933 lines
34 KiB
JavaScript
/**
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* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var clone = require("clone");
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var redUtil = require("@node-red/util").util;
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const events = require("@node-red/util").events;
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var flowUtil = require("./util");
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const context = require('../nodes/context');
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const hooks = require("@node-red/util").hooks;
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const credentials = require("../nodes/credentials");
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var Subflow;
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var Log;
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var nodeCloseTimeout = 15000;
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var asyncMessageDelivery = true;
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/**
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* This class represents a flow within the runtime. It is responsible for
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* creating, starting and stopping all nodes within the flow.
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*/
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class Flow {
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/**
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* Create a Flow object.
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* @param {[type]} parent The parent flow
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* @param {[type]} globalFlow The global flow definition
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* @param {[type]} flow This flow's definition
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*/
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constructor(parent,globalFlow,flow) {
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this.TYPE = 'flow';
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this.parent = parent;
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this.global = globalFlow;
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if (typeof flow === 'undefined') {
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this.flow = globalFlow;
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this.isGlobalFlow = true;
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} else {
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this.flow = flow;
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this.isGlobalFlow = false;
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}
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this.id = this.flow.id || "global";
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this.activeNodes = {};
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this.subflowInstanceNodes = {};
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this.catchNodes = [];
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this.statusNodes = [];
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this.path = this.id;
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// Ensure a context exists for this flow
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this.context = context.getFlowContext(this.id,this.parent.id);
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}
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/**
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* Log a debug-level message from this flow
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* @param {[type]} msg [description]
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* @return {[type]} [description]
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*/
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debug(msg) {
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Log.log({
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id: this.id||"global",
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level: Log.DEBUG,
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type:this.TYPE,
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msg:msg
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})
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}
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/**
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* Log an error-level message from this flow
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* @param {[type]} msg [description]
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* @return {[type]} [description]
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*/
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error(msg) {
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Log.log({
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id: this.id||"global",
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level: Log.ERROR,
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type:this.TYPE,
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msg:msg
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})
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}
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/**
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* Log a info-level message from this flow
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* @param {[type]} msg [description]
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* @return {[type]} [description]
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*/
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info(msg) {
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Log.log({
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id: this.id||"global",
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level: Log.INFO,
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type:this.TYPE,
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msg:msg
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})
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}
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/**
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* Log a trace-level message from this flow
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* @param {[type]} msg [description]
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* @return {[type]} [description]
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*/
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trace(msg) {
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Log.log({
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id: this.id||"global",
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level: Log.TRACE,
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type:this.TYPE,
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msg:msg
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})
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}
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/**
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* [log description]
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* @param {[type]} msg [description]
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* @return {[type]} [description]
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*/
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log(msg) {
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if (!msg.path) {
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msg.path = this.path;
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}
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this.parent.log(msg);
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}
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/**
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* Checks if node A and node B are in the same group.
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* Node B can also be placed in a subgroup.
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* If node A is not in any group, false is returned
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* @param {[type]} nodeIdA [description]
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* @param {[type]} nodeIdB [description]
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* @returns {[type]} Returns true if all nodes are in the same group. If not, then false or if node A is not in a group then also false.
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*/
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isNodeInSameGroup(nodeIdA, nodeIdB) {
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const groups = this.global.groups;
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let result = false;
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for(let key in groups) {
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let group = groups[key];
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if(!group.nodes.includes(nodeIdA.id)) {
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continue;
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}
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if(group.nodes.includes(nodeIdB.id)) {
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result = true;
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break;
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}
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/**
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* Subfunction to recursively search the groups for matches
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* @param {[type]} targetNode [description]
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* @param {[type]} targetGroup [description]
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* @returns Returns true if a match was found. Otherwise false.
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*/
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const isInSubGroup = (targetNode, targetGroup) => {
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let _result = false;
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if(targetGroup.nodes.includes(targetNode.id)) {
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_result = true;
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} else {
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for(let nodeId of targetGroup.nodes) {
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let node = this.getGroupNode(nodeId);
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if(!node){
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continue;
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}
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if(node.type === "group"){
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let result = isInSubGroup(targetNode, node);
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if(result === true){
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_result = true;
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break;
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}
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}
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}
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}
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return _result;
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};
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result = isInSubGroup(nodeIdB, group);
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}
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return result;
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}
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/**
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* Start this flow.
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* The `diff` argument helps define what needs to be started in the case
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* of a modified-nodes/flows type deploy.
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* @param {[type]} msg [description]
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* @return {[type]} [description]
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*/
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start(diff) {
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this.trace("start "+this.TYPE+" ["+this.path+"]");
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var node;
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var newNode;
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var id;
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this.catchNodes = [];
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this.statusNodes = [];
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this.completeNodeMap = {};
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var configNodes = Object.keys(this.flow.configs);
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var configNodeAttempts = {};
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while (configNodes.length > 0) {
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id = configNodes.shift();
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node = this.flow.configs[id];
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if (!this.activeNodes[id]) {
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if (node.d !== true) {
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var readyToCreate = true;
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// This node doesn't exist.
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// Check it doesn't reference another non-existent config node
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for (var prop in node) {
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if (node.hasOwnProperty(prop) &&
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prop !== 'id' &&
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prop !== 'wires' &&
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prop !== '_users' &&
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this.flow.configs[node[prop]] &&
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this.flow.configs[node[prop]].d !== true
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) {
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if (!this.activeNodes[node[prop]]) {
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// References a non-existent config node
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// Add it to the back of the list to try again later
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configNodes.push(id);
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configNodeAttempts[id] = (configNodeAttempts[id]||0)+1;
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if (configNodeAttempts[id] === 100) {
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throw new Error("Circular config node dependency detected: "+id);
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}
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readyToCreate = false;
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break;
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}
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}
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}
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if (readyToCreate) {
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newNode = flowUtil.createNode(this,node);
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if (newNode) {
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this.activeNodes[id] = newNode;
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}
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}
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} else {
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this.debug("not starting disabled config node : "+id);
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}
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}
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}
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if (diff && diff.rewired) {
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for (var j=0;j<diff.rewired.length;j++) {
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var rewireNode = this.activeNodes[diff.rewired[j]];
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if (rewireNode) {
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rewireNode.updateWires(this.flow.nodes[rewireNode.id].wires);
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}
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}
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}
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for (id in this.flow.nodes) {
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if (this.flow.nodes.hasOwnProperty(id)) {
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node = this.flow.nodes[id];
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if (node.d !== true) {
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if (!node.subflow) {
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if (!this.activeNodes[id]) {
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newNode = flowUtil.createNode(this,node);
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if (newNode) {
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this.activeNodes[id] = newNode;
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}
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}
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} else {
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if (!this.subflowInstanceNodes[id]) {
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try {
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var subflowDefinition = this.flow.subflows[node.subflow]||this.global.subflows[node.subflow]
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// console.log("NEED TO CREATE A SUBFLOW",id,node.subflow);
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this.subflowInstanceNodes[id] = true;
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var subflow = Subflow.create(
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this,
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this.global,
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subflowDefinition,
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node
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);
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this.subflowInstanceNodes[id] = subflow;
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subflow.start();
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this.activeNodes[id] = subflow.node;
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// this.subflowInstanceNodes[id] = nodes.map(function(n) { return n.id});
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// for (var i=0;i<nodes.length;i++) {
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// if (nodes[i]) {
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// this.activeNodes[nodes[i].id] = nodes[i];
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// }
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// }
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} catch(err) {
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console.log(err.stack)
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}
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}
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}
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} else {
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this.debug("not starting disabled node : "+id);
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}
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}
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}
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var activeCount = Object.keys(this.activeNodes).length;
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if (activeCount > 0) {
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this.trace("------------------|--------------|-----------------");
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this.trace(" id | type | alias");
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this.trace("------------------|--------------|-----------------");
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}
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// Build the map of catch/status/complete nodes.
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for (id in this.activeNodes) {
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if (this.activeNodes.hasOwnProperty(id)) {
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node = this.activeNodes[id];
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this.trace(" "+id.padEnd(16)+" | "+node.type.padEnd(12)+" | "+(node._alias||"")+(node._zAlias?" [zAlias:"+node._zAlias+"]":""));
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if (node.type === "catch") {
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this.catchNodes.push(node);
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} else if (node.type === "status") {
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this.statusNodes.push(node);
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} else if (node.type === "complete") {
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if (node.scope) {
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node.scope.forEach(id => {
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this.completeNodeMap[id] = this.completeNodeMap[id] || [];
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this.completeNodeMap[id].push(node);
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})
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}
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}
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}
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}
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this.catchNodes.sort(function(A,B) {
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if (A.scope && !B.scope) {
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return -1;
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} else if (!A.scope && B.scope) {
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return 1;
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} else if (A.scope && B.scope) {
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return 0;
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} else if (A.uncaught && !B.uncaught) {
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return 1;
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} else if (!A.uncaught && B.uncaught) {
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return -1;
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}
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return 0;
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});
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if (activeCount > 0) {
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this.trace("------------------|--------------|-----------------");
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}
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// this.dump();
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}
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/**
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* Stop this flow.
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* The `stopList` argument helps define what needs to be stopped in the case
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* of a modified-nodes/flows type deploy.
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* @param {[type]} stopList [description]
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* @param {[type]} removedList [description]
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* @return {[type]} [description]
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*/
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stop(stopList, removedList) {
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this.trace("stop "+this.TYPE);
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var i;
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if (!stopList) {
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stopList = Object.keys(this.activeNodes);
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}
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// this.trace(" stopList: "+stopList.join(","))
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// Convert the list to a map to avoid multiple scans of the list
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var removedMap = {};
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removedList = removedList || [];
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removedList.forEach(function(id) {
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removedMap[id] = true;
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});
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let nodesToStop = [];
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let configsToStop = [];
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stopList.forEach(id => {
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if (this.flow.configs[id]) {
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configsToStop.push(id);
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} else {
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nodesToStop.push(id);
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}
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});
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stopList = nodesToStop.concat(configsToStop);
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var promises = [];
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for (i=0;i<stopList.length;i++) {
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var node = this.activeNodes[stopList[i]];
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if (node) {
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delete this.activeNodes[stopList[i]];
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if (this.subflowInstanceNodes[stopList[i]]) {
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delete this.subflowInstanceNodes[stopList[i]];
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}
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try {
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var removed = removedMap[stopList[i]];
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promises.push(stopNode(node,removed).catch(()=>{}));
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} catch(err) {
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node.error(err);
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}
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if (removedMap[stopList[i]]) {
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events.emit("node-status",{
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id: node.id
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});
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}
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}
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}
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return Promise.all(promises);
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}
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/**
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* Update the flow definition. This doesn't change anything that is running.
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* This should be called after `stop` and before `start`.
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* @param {[type]} _global [description]
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* @param {[type]} _flow [description]
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* @return {[type]} [description]
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*/
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update(_global,_flow) {
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this.global = _global;
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this.flow = _flow;
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}
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/**
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* Get a node instance from this flow. If the node is not known to this
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* flow, pass the request up to the parent.
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* @param {String} id [description]
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* @param {Boolean} cancelBubble if true, prevents the flow from passing the request to the parent
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* This stops infinite loops when the parent asked this Flow for the
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* node to begin with.
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* @return {[type]} [description]
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*/
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getNode(id, cancelBubble) {
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if (!id) {
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return undefined;
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}
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// console.log((new Error().stack).toString().split("\n").slice(1,3).join("\n"))
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if ((this.flow.configs && this.flow.configs[id]) || (this.flow.nodes && this.flow.nodes[id] && this.flow.nodes[id].type.substring(0,8) != "subflow:")) {
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// This is a node owned by this flow, so return whatever we have got
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// During a stop/restart, activeNodes could be null for this id
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return this.activeNodes[id];
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} else if (this.activeNodes[id]) {
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// TEMP: this is a subflow internal node within this flow or subflow instance node
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return this.activeNodes[id];
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} else if (this.subflowInstanceNodes[id]) {
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return this.subflowInstanceNodes[id];
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} else if (cancelBubble) {
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// The node could be inside one of this flow's subflows
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var node;
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for (var sfId in this.subflowInstanceNodes) {
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if (this.subflowInstanceNodes.hasOwnProperty(sfId)) {
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node = this.subflowInstanceNodes[sfId].getNode(id,cancelBubble);
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if (node) {
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return node;
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}
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}
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}
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} else {
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// Node not found inside this flow - ask the parent
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return this.parent.getNode(id);
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}
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return undefined;
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}
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|
|
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/**
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* Get a group node instance
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* @param {String} id
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* @return {Node} group node
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*/
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getGroupNode(id) {
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const groups = this.global.groups;
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return groups[id];
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}
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/**
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* Get all of the nodes instantiated within this flow
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* @return {[type]} [description]
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*/
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getActiveNodes() {
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return this.activeNodes;
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}
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|
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/*!
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* Get value of environment variable defined in group node.
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* @param {String} group - group node
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* @param {String} name - name of variable
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* @return {Object} object containing the value in val property or null if not defined
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*/
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getGroupEnvSetting(node, group, name) {
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if (group) {
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if (name === "NR_GROUP_NAME") {
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return [{
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val: group.name
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}, null];
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}
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if (name === "NR_GROUP_ID") {
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return [{
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val: group.id
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}, null];
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}
|
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|
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if (group.credentials === undefined) {
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group.credentials = credentials.get(group.id) || {};
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}
|
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if (!name.startsWith("$parent.")) {
|
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if (group.env) {
|
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if (!group._env) {
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const envs = group.env;
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const entries = envs.map((env) => {
|
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if (env.type === "cred") {
|
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const cred = group.credentials;
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if (cred.hasOwnProperty(env.name)) {
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env.value = cred[env.name];
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}
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}
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return [env.name, env];
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});
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group._env = Object.fromEntries(entries);
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}
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const env = group._env[name];
|
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if (env) {
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let value = env.value;
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const type = env.type;
|
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if ((type !== "env") ||
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(value !== name)) {
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if (type === "env") {
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value = value.replace(new RegExp("\\${"+name+"}","g"),"${$parent."+name+"}");
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}
|
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if (type === "bool") {
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const val
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= ((value === "true") ||
|
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(value === true));
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return [{
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val: val
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}, null];
|
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}
|
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if (type === "cred") {
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return [{
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val: value
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}, null];
|
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}
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try {
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var val = redUtil.evaluateNodeProperty(value, type, node, null, null);
|
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return [{
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val: val
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}, null];
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}
|
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catch (e) {
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this.error(e);
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return [null, null];
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}
|
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}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
name = name.substring(8);
|
|
}
|
|
if (group.g) {
|
|
const parent = this.getGroupNode(group.g);
|
|
return this.getGroupEnvSetting(node, parent, name);
|
|
}
|
|
}
|
|
return [null, name];
|
|
}
|
|
|
|
|
|
/**
|
|
* 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) {
|
|
const flow = this.flow;
|
|
if (key === "NR_FLOW_NAME") {
|
|
return flow.label;
|
|
}
|
|
if (key === "NR_FLOW_ID") {
|
|
return flow.id;
|
|
}
|
|
if (flow.credentials === undefined) {
|
|
flow.credentials = credentials.get(flow.id) || {};
|
|
}
|
|
if (flow.env) {
|
|
if (!key.startsWith("$parent.")) {
|
|
if (!flow._env) {
|
|
const envs = flow.env;
|
|
const entries = envs.map((env) => {
|
|
if (env.type === "cred") {
|
|
const cred = flow.credentials;
|
|
if (cred.hasOwnProperty(env.name)) {
|
|
env.value = cred[env.name];
|
|
}
|
|
}
|
|
return [env.name, env]
|
|
});
|
|
flow._env = Object.fromEntries(entries);
|
|
}
|
|
const env = flow._env[key];
|
|
if (env) {
|
|
let value = env.value;
|
|
const type = env.type;
|
|
if ((type !== "env") || (value !== key)) {
|
|
if (type === "env") {
|
|
value = value.replace(new RegExp("\\${"+key+"}","g"),"${$parent."+key+"}");
|
|
}
|
|
try {
|
|
if (type === "bool") {
|
|
const val = ((value === "true") ||
|
|
(value === true));
|
|
return val;
|
|
}
|
|
if (type === "cred") {
|
|
return value;
|
|
}
|
|
var val = redUtil.evaluateNodeProperty(value, type, null, null, null);
|
|
return val;
|
|
}
|
|
catch (e) {
|
|
this.error(e);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
key = key.substring(8);
|
|
}
|
|
}
|
|
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) {
|
|
if (statusMessage.hasOwnProperty("text") && typeof statusMessage.text !== "string") {
|
|
try {
|
|
statusMessage.text = statusMessage.text.toString();
|
|
}
|
|
catch(e) {}
|
|
}
|
|
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 {
|
|
const flow = this;
|
|
this.statusNodes.forEach(function(targetStatusNode) {
|
|
if (Array.isArray(targetStatusNode.scope) && targetStatusNode.scope.indexOf(reportingNode.id) === -1) {
|
|
return;
|
|
}
|
|
|
|
if (targetStatusNode.scope === "group" && flow.isNodeInSameGroup(targetStatusNode, reportingNode) === false){
|
|
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) {
|
|
if (msg.error.hasOwnProperty("source") && msg.error.source) {
|
|
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;
|
|
|
|
const flow = this;
|
|
this.catchNodes.forEach(function(targetCatchNode) {
|
|
if (Array.isArray(targetCatchNode.scope) && targetCatchNode.scope.indexOf(reportingNode.id) === -1) {
|
|
return;
|
|
}
|
|
|
|
if (targetCatchNode.scope === "group" && flow.isNodeInSameGroup(targetCatchNode, reportingNode) === false){
|
|
return;
|
|
}
|
|
|
|
if ((!targetCatchNode.scope || targetCatchNode.scope === "group") && 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;
|
|
}
|
|
|
|
handleComplete(node,msg) {
|
|
if (this.completeNodeMap[node.id]) {
|
|
let toSend = msg;
|
|
this.completeNodeMap[node.id].forEach((completeNode,index) => {
|
|
toSend = redUtil.cloneMessage(msg);
|
|
completeNode.receive(toSend);
|
|
})
|
|
}
|
|
}
|
|
|
|
send(sendEvents) {
|
|
// onSend - passed an array of SendEvent objects. The messages inside these objects are exactly what the node has passed to node.send - meaning there could be duplicate references to the same message object.
|
|
// preRoute - called once for each SendEvent object in turn
|
|
// preDeliver - the local router has identified the node it is going to send to. At this point, the message has been cloned if needed.
|
|
// postDeliver - the message has been dispatched to be delivered asynchronously (unless the sync delivery flag is set, in which case it would be continue as synchronous delivery)
|
|
// onReceive - a node is about to receive a message
|
|
// postReceive - the message has been passed to the node's input handler
|
|
// onDone, onError - the node has completed with a message or logged an error
|
|
handleOnSend(this,sendEvents, (err, eventData) => {
|
|
if (err) {
|
|
let srcNode;
|
|
if (Array.isArray(eventData)) {
|
|
srcNode = eventData[0].source.node;
|
|
} else {
|
|
srcNode = eventData.source.node;
|
|
}
|
|
srcNode.error(err);
|
|
}
|
|
});
|
|
}
|
|
|
|
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);
|
|
let closeTimer = null;
|
|
const closeTimeout = new Promise((resolve,reject) => {
|
|
closeTimer = setTimeout(() => {
|
|
reject("Close timed out");
|
|
}, nodeCloseTimeout);
|
|
});
|
|
return Promise.race([closePromise,closeTimeout]).then(() => {
|
|
clearTimeout(closeTimer);
|
|
var delta = Date.now() - start;
|
|
Log.trace("Stopped node "+node.type+":"+node.id+" ("+delta+"ms)" );
|
|
}).catch(err => {
|
|
clearTimeout(closeTimer);
|
|
node.error(Log._("nodes.flows.stopping-error",{message:err}));
|
|
Log.debug(err.stack);
|
|
})
|
|
}
|
|
|
|
|
|
function handleOnSend(flow,sendEvents, reportError) {
|
|
// onSend - passed an array of SendEvent objects. The messages inside these objects are exactly what the node has passed to node.send - meaning there could be duplicate references to the same message object.
|
|
hooks.trigger("onSend",sendEvents,(err) => {
|
|
if (err) {
|
|
reportError(err,sendEvents);
|
|
return
|
|
} else if (err !== false) {
|
|
for (var i=0;i<sendEvents.length;i++) {
|
|
handlePreRoute(flow,sendEvents[i],reportError)
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
function handlePreRoute(flow, sendEvent, reportError) {
|
|
// preRoute - called once for each SendEvent object in turn
|
|
hooks.trigger("preRoute",sendEvent,(err) => {
|
|
if (err) {
|
|
reportError(err,sendEvent);
|
|
return;
|
|
} else if (err !== false) {
|
|
sendEvent.destination.node = flow.getNode(sendEvent.destination.id);
|
|
if (sendEvent.destination.node) {
|
|
if (sendEvent.cloneMessage) {
|
|
sendEvent.msg = redUtil.cloneMessage(sendEvent.msg);
|
|
}
|
|
handlePreDeliver(flow,sendEvent,reportError);
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
function handlePreDeliver(flow,sendEvent, reportError) {
|
|
// preDeliver - the local router has identified the node it is going to send to. At this point, the message has been cloned if needed.
|
|
hooks.trigger("preDeliver",sendEvent,(err) => {
|
|
if (err) {
|
|
reportError(err,sendEvent);
|
|
return;
|
|
} else if (err !== false) {
|
|
if (asyncMessageDelivery) {
|
|
setImmediate(function() {
|
|
if (sendEvent.destination.node) {
|
|
sendEvent.destination.node.receive(sendEvent.msg);
|
|
}
|
|
})
|
|
} else {
|
|
if (sendEvent.destination.node) {
|
|
sendEvent.destination.node.receive(sendEvent.msg);
|
|
|
|
}
|
|
}
|
|
// postDeliver - the message has been dispatched to be delivered asynchronously (unless the sync delivery flag is set, in which case it would be continue as synchronous delivery)
|
|
hooks.trigger("postDeliver", sendEvent, function(err) {
|
|
if (err) {
|
|
reportError(err,sendEvent);
|
|
}
|
|
})
|
|
}
|
|
})
|
|
}
|
|
|
|
module.exports = {
|
|
init: function(runtime) {
|
|
nodeCloseTimeout = runtime.settings.nodeCloseTimeout || 15000;
|
|
asyncMessageDelivery = !runtime.settings.runtimeSyncDelivery
|
|
Log = runtime.log;
|
|
Subflow = require("./Subflow");
|
|
},
|
|
create: function(parent,global,conf) {
|
|
return new Flow(parent,global,conf);
|
|
},
|
|
Flow: Flow
|
|
}
|