53 lines
1.6 KiB
Rust
53 lines
1.6 KiB
Rust
#[derive(Debug, Clone, Copy, PartialEq)]
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pub enum NatsMode {
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Core,
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JetStream,
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}
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#[derive(Debug, Clone)]
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pub struct NatsConfig {
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pub url: String,
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pub mode: NatsMode,
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pub subject_prefix: String,
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pub stream_name: String,
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pub consumer_name: String,
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}
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impl NatsConfig {
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pub fn from_env() -> anyhow::Result<Self> {
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Self::from_vars(
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std::env::var("NATS_URL").ok().as_deref(),
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std::env::var("NATS_MODE").ok().as_deref(),
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std::env::var("NATS_SUBJECT_PREFIX").ok().as_deref(),
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std::env::var("NATS_STREAM_NAME").ok().as_deref(),
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std::env::var("NATS_CONSUMER_NAME").ok().as_deref(),
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)
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}
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pub(crate) fn from_vars(
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url: Option<&str>,
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mode: Option<&str>,
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subject_prefix: Option<&str>,
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stream_name: Option<&str>,
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consumer_name: Option<&str>,
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) -> anyhow::Result<Self> {
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let url = url.ok_or_else(|| anyhow::anyhow!("NATS_URL is not set"))?;
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let mode = match mode.unwrap_or("jetstream") {
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"core" => NatsMode::Core,
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"jetstream" => NatsMode::JetStream,
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other => anyhow::bail!("unknown NATS_MODE: {other}"),
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};
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let subject_prefix = subject_prefix.unwrap_or("movies-diary.events").to_string();
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let stream_name = stream_name.unwrap_or("MOVIES_DIARY_EVENTS").to_string();
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let consumer_name = consumer_name.unwrap_or("worker").to_string();
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Ok(Self { url: url.to_string(), mode, subject_prefix, stream_name, consumer_name })
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}
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}
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#[cfg(test)]
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#[path = "tests/config.rs"]
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mod tests;
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