Registry / devops / node-red-contrib-exec-queue

node-red-contrib-exec-queue

library1.0.28jsnpmunverified

A Node-RED alternative exec node that runs template code with a queue. Version 1.0.28. This node allows executing any command-line program (bash, Node.js, Python, etc.) from Node-RED, queuing executions to avoid overwhelming the system. Key differentiators: built-in queue, template-based code editing, and support for multiple programming languages. Does not work on Windows, has performance limitations with high message rates. Stable release with no recent updates.

devops

npm install node-red-contrib-exec-queue

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · NODE-RED-CONTRIB-E

node-red-contrib-exec-queue

devopsjavascriptv1.0.28

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

exec queue

✓ Add the node from the Node-RED palette (node-red-contrib-exec-queue is installed as a npm package)

✗ Importing as a JavaScript module in Node-RED function nodes

This is a Node-RED custom node, not a library to be imported in code. It appears in the palette as 'exec queue' under the 'advanced' category.

ExecQueue

✓ N/A - No programmatic API, only Node-RED node

No JavaScript API is exported; the package is used solely via Node-RED's flow editor.

Shows how to install and use the node in Node-RED to execute Node.js code via 'node $file' command.

// This node is used via Node-RED's flow editor. // 1. Install: npm install node-red-contrib-exec-queue // 2. Restart Node-RED // 3. Add an 'exec queue' node from the palette // 4. In the node config, set Command to "node $file" // 5. Write Node.js code in the template editor // 6. Deploy and inject a msg to execute the code // Example flow JSON: [{"id":"1fe0aad8f59279e6","type":"exec queue","name":"node.js code","command":"node $file","debugMode":false,"outputs":1,"useSpawn":"false","field":"payload","x":450,"y":320,"wires":[["node-id"]]}]

Debug

Known issues

gotchaDoes not work on Windows - Linux only.

fix

Use WSL or a Linux VM/machine.

affects: *

gotchaPerformance: Slow for high message rates (e.g., ~2 minutes for 10k simple executions).

fix

Avoid using for high-throughput scenarios; batch messages or use alternative node if performance critical.

affects: <=1.0.28

gotchaSpawn mode (useSpawn) may cause unexpected behavior if not used correctly.

fix

Set 'useSpawn' to true only if you need to run a long-lived process; otherwise keep as false.

affects: *

Errors

Common errors & fixes

Error: spawn ENOENT

Command not found or path incorrect.

fix

Ensure the command (e.g., 'python3') is installed and accessible in the system PATH.

TypeError: Cannot read properties of undefined (reading 'length')

Missing or malformed msg.payload when node expects a string.

fix

Ensure incoming msg.payload is a string containing the code to execute.

Error: exec queue node is not defined

Node not installed or not restarted after install.

fix

Run 'npm install node-red-contrib-exec-queue' in your Node-RED user directory and restart Node-RED.

Upgrade

Version history

1.0.28latest on npm

Audit

Dependencies

node-redoptionalRequires Node-RED runtime to be installed

Agent activity

4 hits · last 30 days

node

Resources

githubhttps://github.com/rafaelmuynarsk/node-red-contrib-exec-queue ↗

packagenode-red-contrib-exec-queue ↗

homepagehttps://github.com/rafaelmuynarsk/node-red-contrib-exec-queue ↗