Ignite Cookbook

This is a collection of recipes for how to use Ignite to solve many common programming tasks.

Each recipe addresses a specific problem and shows by example how it can be solved using the capabilities of the platform.

Table of Contents

Messages

• Set a message property to a fixed value
• Delete a message property
• Move a message property
• Map a property between different numeric ranges

Flow control

• Trigger a flow whenever Ignite starts
• Trigger a flow at regular intervals
• Trigger a flow at a specific time
• Route a message based on one of its properties
• Route a message based on a context value
• Perform an operation on each element in an array
• Trigger a flow if a message isn’t received after a defined time
• Send placeholder messages when a stream stops sending
• Slow down messages passing through a flow
• Handle messages at a regular rate
• Drop messages that have not changed value
• Create a single message from separate streams of messages

Error handling

• Trigger a flow when a node throws an error
• Automatically retry an action after an error

Working with data formats

• Convert to/from JSON
• Convert to/from XML
• Convert to/from YAML
• Generate CSV output
• Parse CSV input
• Extracting data from an HTML page
• Split text into one message per line

HTTP endpoints

• Create an HTTP Endpoint
• Handle query parameters passed to an HTTP endpoint
• Handle url parameters in an HTTP endpoint
• Access HTTP request headers
• Serve JSON content
• Serve a local file
• Post raw data to a flow
• Post form data to a flow
• Post JSON data to a flow
• Work with cookies

HTTP requests

• Simple GET request
• Set the url of a request
• Set the url of a request using a template
• Set query string parameters
• Get a parsed JSON response
• Get a binary response
• Set a request header

MQTT

• Connect to an MQTT broker
• Publish messages to a topic
• Set the topic of a published message
• Publish a retained message to a topic
• Subscribe to a topic
• Receive a parsed JSON message

OData

• Define a Metadata Model
• Define Metadata Model using EDM
• Convert Request to Query
• Read Only OData Service
• Create an OData Service

Sequelize

• Execute a Query

Auth

• Basic Authentication
• Generate JWT
• Verify JWT