Module nats_config 

Shared NATS server-list and JetStream context helpers.

The streamer, archiver, exporter and subscriber all connect to a NATS server (by default the local one), and the streamer and archiver open JetStream contexts, including ones on a central server for configuration mirroring. These helpers read the server list and the optional JetStream domain from the environment in one consistent way.

Configuration

• NATS_SERVERS - Comma-separated NATS server URLs, read by servers_from_env. Default: nats://127.0.0.1:4222.
• JS_DOMAIN - JetStream domain, read by jetstream_context. Unset or blank means no domain.

Constants

DEFAULT_NATS_SERVERS 🔒

Default NATS server URL used when NATS_SERVERS is unset: the local server on the standard NATS port.

Functions

jetstream_context

Creates the default JetStream context, using JS_DOMAIN as the domain if set.

jetstream_context_for_domain

Creates a JetStream context for an explicit optional domain.

jetstream_context_from_env

Creates a JetStream context using a domain name read from an environment variable.

servers_from_env

Parses NATS_SERVERS, defaulting to DEFAULT_NATS_SERVERS.

servers_from_env_var

Parses a comma-separated NATS server list from an environment variable.