components-contrib/bindings/Readme.md

Bindings

Bindings provide a common way to trigger an application with events from external systems, or invoke an external system with optional data payloads. Bindings are great for event-driven, on-demand compute and help reduce boilerplate code.

List of bindings and their status:

Name	Input Binding	Output Binding	Status
Kafka	V	V	Experimental
RabbitMQ	V	V	Experimental
AWS SQS	V	V	Experimental
AWS SNS		V	Experimental
GCP Cloud Pub/Sub	V	V	Experimental
Azure EventHubs	V	V	Experimental
Azure CosmosDB		V	Experimental
GCP Storage Bucket		V	Experimental
HTTP		V	Experimental
MQTT	V	V	Experimental
Redis		V	Experimental
AWS DynamoDB		V	Experimental
AWS S3		V	Experimental
Azure Blob Storage		V	Experimental
Azure Service Bus Queues	V	V	Experimental
Kubernetes Events	V		Experimental

Implementing a new binding

A compliant binding needs to implement one or more interfaces, depending on the type of binding (Input or Output):

Input binding:

type InputBinding interface {
	Init(metadata Metadata) error
	Read(handler func(*ReadResponse) error) error
}

Output binding:

type OutputBinding interface {
	Init(metadata Metadata) error
	Write(req *WriteRequest) error
}