Lib.rs

› WebAssembly › wasmCloud
#nats #capability-provider #subscription #jwt #wasmcloud #contract #topic

wasmcloud-provider-messaging-nats

A capability provider that satisfies the 'wasmcloud:messaging' contract using NATS as a backend

by automation-wasmcloud, Brooks Townsend, Roman Volosatovs, vados-cosmonic, Taylor Thomas, Steve Schoettler, The wasmCloud Team (92 contributors)

1 unstable release

new 0.24.0 Jan 23, 2025

#1352 in WebAssembly

Download history 280/week @ 2025-01-22

280 downloads per month
Used in 3 crates (via wasmcloud-host)

Apache-2.0

1.5MB
4K SLoC

NATS Capability Provider

This capability provider is an implementation of the wasmcloud:messaging contract. It exposes publish, request, and subscribe functionality to components.

To configure this provider, use the following link settings in link definitions:

Property Description
SUBSCRIPTIONS A comma-separated list of subscription topics. If a subscription is a queue subscription, follow the subscription with "|" and the queue group name. For example, the setting SUBSCRIPTIONS=example.actor,example.task|work_queue subscribes to the topic example.actor and the topic example.task in the queue group work_queue.
CLUSTER_URIS NATS connection uri. If not specified, the default is 0.0.0.0:4222
CLIENT_JWT Optional JWT auth token. For JWT authentication, both CLIENT_JWT and CLIENT_SEED must be provided.
CLIENT_SEED Private seed for JWT authentication.

Dependencies

~36–51MB
~1M SLoC