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Merge pull request #4332 from node-red/4330-fix-multiple-input-handlers

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Handle nodes with multiple input handlers properly
This commit is contained in:
Nick O'Leary
2023-09-19 09:19:22 +01:00
committed by GitHub
parent 90045683c9 ee2d91fb4a
commit 2ccdeb968c
2 changed files with 39 additions and 5 deletions
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15
packages/node_modules/@node-red/runtime/lib/nodes/Node.js vendored
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@@ -42,6 +42,7 @@ function Node(n) {
this._closeCallbacks = [];
this._inputCallback = null;
this._inputCallbacks = null;
this._expectedDoneCount = 0;
if (n.name) {
this.name = n.name;
@@ -159,6 +160,9 @@ Node.prototype.on = function(event, callback) {
if (event == "close") {
this._closeCallbacks.push(callback);
} else if (event === "input") {
if (callback.length === 3) {
this._expectedDoneCount++
}
if (this._inputCallback) {
this._inputCallbacks = [this._inputCallback, callback];
this._inputCallback = null;
@@ -218,19 +222,17 @@ Node.prototype._emitInput = function(arg) {
} else if (node._inputCallbacks) {
// Multiple callbacks registered. Call each one, tracking eventual completion
var c = node._inputCallbacks.length;
let doneCount = 0
for (var i=0;i<c;i++) {
var cb = node._inputCallbacks[i];
if (cb.length === 2) {
c++;
}
try {
cb.call(
node,
arg,
function() { node.send.apply(node,arguments) },
function(err) {
c--;
if (c === 0) {
doneCount++;
if (doneCount === node._expectedDoneCount) {
node._complete(arg,err);
}
}
@@ -257,6 +259,9 @@ Node.prototype._removeListener = Node.prototype.removeListener;
Node.prototype.removeListener = function(name, listener) {
var index;
if (name === "input") {
if (listener.length === 3) {
this._expectedDoneCount--
}
if (this._inputCallback && this._inputCallback === listener) {
// Removing the only callback
this._inputCallback = null;