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Add message router component

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This commit is contained in:
Nick O'Leary
2016-10-29 21:46:19 +01:00
parent 1fd87bf664
commit cebddc0237
6 changed files with 223 additions and 128 deletions
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114
red/runtime/nodes/Node.js
View File

@@ -22,6 +22,7 @@ var redUtil = require("../util");
var Log = require("../log");
var context = require("./context");
var flows = require("./flows");
var router = require("./router");
function Node(n) {
this.id = n.id;
@@ -41,28 +42,10 @@ function Node(n) {
util.inherits(Node, EventEmitter);
Node.prototype.updateWires = function(wires) {
//console.log("UPDATE",this.id);
router.add(this,wires);
this.wires = wires || [];
delete this._wire;
var wc = 0;
this.wires.forEach(function(w) {
wc+=w.length;
});
this._wireCount = wc;
if (wc === 0) {
// With nothing wired to the node, no-op send
this.send = function(msg) {}
} else {
this.send = Node.prototype.send;
if (this.wires.length === 1 && this.wires[0].length === 1) {
// Single wire, so we can shortcut the send when
// a single message is sent
this._wire = this.wires[0][0];
}
}
}
Node.prototype.context = function() {
if (!this._context) {
this._context = context.get(this._alias||this.id,this.z);
@@ -100,103 +83,22 @@ Node.prototype.close = function() {
}
if (promises.length > 0) {
return when.settle(promises).then(function() {
router.remove(this);
if (this._context) {
context.delete(this._alias||this.id,this.z);
context.delete(this._alias||this.id,this.z);
}
});
} else {
router.remove(this);
if (this._context) {
context.delete(this._alias||this.id,this.z);
context.delete(this._alias||this.id,this.z);
}
return;
}
};
Node.prototype.send = function(msg) {
var msgSent = false;
var node;
if (msg === null || typeof msg === "undefined") {
return;
} else if (!util.isArray(msg)) {
if (this._wire) {
// A single message and a single wire on output 0
// TODO: pre-load flows.get calls - cannot do in constructor
// as not all nodes are defined at that point
if (!msg._msgid) {
msg._msgid = redUtil.generateId();
}
this.metric("send",msg);
node = flows.get(this._wire);
/* istanbul ignore else */
if (node) {
node.receive(msg);
}
return;
} else {
msg = [msg];
}
}
var numOutputs = this.wires.length;
// Build a list of send events so that all cloning is done before
// any calls to node.receive
var sendEvents = [];
var sentMessageId = null;
// for each output of node eg. [msgs to output 0, msgs to output 1, ...]
for (var i = 0; i < numOutputs; i++) {
var wires = this.wires[i]; // wires leaving output i
/* istanbul ignore else */
if (i < msg.length) {
var msgs = msg[i]; // msgs going to output i
if (msgs !== null && typeof msgs !== "undefined") {
if (!util.isArray(msgs)) {
msgs = [msgs];
}
var k = 0;
// for each recipent node of that output
for (var j = 0; j < wires.length; j++) {
node = flows.get(wires[j]); // node at end of wire j
if (node) {
// for each msg to send eg. [[m1, m2, ...], ...]
for (k = 0; k < msgs.length; k++) {
var m = msgs[k];
if (m !== null && m !== undefined) {
/* istanbul ignore else */
if (!sentMessageId) {
sentMessageId = m._msgid;
}
if (msgSent) {
var clonedmsg = redUtil.cloneMessage(m);
sendEvents.push({n:node,m:clonedmsg});
} else {
sendEvents.push({n:node,m:m});
msgSent = true;
}
}
}
}
}
}
}
}
/* istanbul ignore else */
if (!sentMessageId) {
sentMessageId = redUtil.generateId();
}
this.metric("send",{_msgid:sentMessageId});
for (i=0;i<sendEvents.length;i++) {
var ev = sendEvents[i];
/* istanbul ignore else */
if (!ev.m._msgid) {
ev.m._msgid = sentMessageId;
}
ev.n.receive(ev.m);
}
router.send(this,msg);
};
Node.prototype.receive = function(msg) {

4
red/runtime/nodes/index.js
View File

@@ -14,10 +14,6 @@
* limitations under the License.
**/
var when = require("when");
var path = require("path");
var fs = require("fs");
var registry = require("./registry");
var credentials = require("./credentials");
var flows = require("./flows");

112
red/runtime/nodes/router/index.js Normal file
View File

@@ -0,0 +1,112 @@
/**
* Copyright 2016 IBM Corp.
*
* 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 util = require("util");
var flows = require("../flows");
var redUtil = require("../../util");
var runtime;
var routes = {};
var sendQueue = [];
function init(_runtime) {
runtime = _runtime;
wires = {};
}
function add(sourceNode, wires) {
routes[sourceNode.id] = wires;
}
function remove(sourceNode) {
delete routes[sourceNode.id];
}
function send(sourceNode, msg) {
if (msg === null || typeof msg === "undefined") {
return;
} else if (!util.isArray(msg)) {
msg = [msg];
}
var node;
var msgSent = false;
var nodeWires = routes[sourceNode.id];
if (nodeWires) {
var numOutputs = nodeWires.length;
var sendEvents = [];
var sentMessageId = null;
// for each output of node eg. [msgs to output 0, msgs to output 1, ...]
for (var i = 0; i < numOutputs; i++) {
var wires = nodeWires[i];
/* istanbul ignore else */
if (i < msg.length) {
var msgs = msg[i]; // msgs going to output i
if (msgs !== null && typeof msgs !== "undefined") {
if (!util.isArray(msgs)) {
msgs = [msgs];
}
var k = 0;
// for each recipent node of that output
for (var j = 0; j < wires.length; j++) {
node = flows.get(wires[j]); // node at end of wire j
if (node) {
// for each msg to send eg. [[m1, m2, ...], ...]
for (k = 0; k < msgs.length; k++) {
var m = msgs[k];
if (m !== null && m !== undefined) {
/* istanbul ignore else */
if (!sentMessageId) {
sentMessageId = m._msgid;
}
if (msgSent) {
var clonedmsg = redUtil.cloneMessage(m);
sendEvents.push({n:node,m:clonedmsg});
} else {
sendEvents.push({n:node,m:m});
msgSent = true;
}
}
}
}
}
}
}
}
/* istanbul ignore else */
if (!sentMessageId) {
sentMessageId = redUtil.generateId();
}
sourceNode.metric("send",{_msgid:sentMessageId});
for (i=0;i<sendEvents.length;i++) {
var ev = sendEvents[i];
/* istanbul ignore else */
if (!ev.m._msgid) {
ev.m._msgid = sentMessageId;
}
ev.n.receive(ev.m);
}
}
}
module.exports = {
init:init,
add:add,
remove: remove,
send:send
}