Lib.rs

Cargo Features

[dependencies]
async-nats = { version = "0.38.0", default-features = false, features = ["service", "websockets", "aws-lc-rs", "ring", "fips", "experimental", "server_2_10", "slow_tests", "compatibility_tests"] }

default = ring, server_2_10

These default features are set whenever async-nats is added without default-features = false somewhere in the dependency tree.

service experimental?

Enables Service API for the client.

Affects async-nats::service…

websockets

Enables tokio-websockets

aws-lc-rs fips?

Enables aws-lc-rs and aws-lc-rs of tokio-rustls and tokio-websockets

tokio-rustls:

Alias because Cargo features commonly use -

ring default

Enables ring, ring of tokio-rustls and tokio-websockets

fips = aws-lc-rs

Enables fips of tokio-rustls

experimental = service

All experimental features are part of this feature flag.

server_2_10 default

Features that require nats-server version 2.10 or higher.
It is enabled by default since official 2.10 nats-server release.

Affects consumer::Config.filter_subjects, consumer::Config.metadata, pull::OrderedConfig.filter_subjects, pull::OrderedConfig.metadata, pull::Config.filter_subjects, pull::Config.metadata, push::Config.filter_subjects, push::Config.metadata, push::OrderedConfig.filter_subjects, push::OrderedConfig.metadata, kv::Config.compression, stream::Config.metadata, stream::Config.subject_transform, stream::Config.compression, stream::Config.consumer_limits, stream::Config.first_sequence, stream::Source.subject_transforms…

slow_tests

Used for enabling/disabling tests that by design take a lot of time to complete.
Those tests are usually used for time-sensitive checks, like consumer heartbeats, longer timeouts, etc.

compatibility_tests

Used for tests that ensure compatibility across client libraries in APIs that are abstraction layer build on top of NATS server features (Service API, KV, Object Store etc.)