Configurable retry mechanism for Node-RED flows.

A user-friendly node for configurable retry handling in Node-RED flows.

Features

• Limit number of retry approaches.
• Different retry strategies:
  • Immediate
  • Fixed Delay
  • Random Delay
• Routing/Re-Throwing of subsequent errors if retries limit is exceeded.

Installation

You can install the nodes using the Node-RED 'Manage palette' in the side bar.

Or run the following command in the root directory of your Node-RED installation

npm install @waldbaer/node-red-retry

Changelog

Changes can be followed here.

Usage

Introduction

Wiring

1. Add a retry node before a flow section which might fail.
2. Add a catch node and catch all errors of the node(s) which might fail with errors. It is recommended to catch only errors from the potentially failing nodes (catch node option: Catch errors from 'selected nodes').
3. Connect the output of the catch node to the input of the retry node.

Configuration

• Set max. number of retry approaches
• Configure used retry strategy.
• Optional: Enable throwing of every subsequent error msg as error if the retries limit is exceeded.

Examples

Import into Node-RED instance via Node-RED -> Import -> Examples -> @waldbaer/node-red-retry.

Development

Setup environment

npm install --save-dev

Format / Linter / Tests

# Check linter
npm run lint

# Run all tests incl. coverage check
npm run coverage

# Run subset of tests
npm run test -- -g "<filter>"

# Node-RED package verification
npm run node-red-dev-validate

Update dependencies to latest versions

# Show outdated dependencies
npm outdated