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use crate::ExportConfig;
use std::fmt::{Debug, Formatter};
use tonic::metadata::MetadataMap;
#[cfg(feature = "tls")]
use tonic::transport::ClientTlsConfig;
use super::default_headers;
#[derive(Debug, Default)]
#[non_exhaustive]
pub struct TonicConfig {
pub metadata: Option<MetadataMap>,
#[cfg(feature = "tls")]
pub tls_config: Option<ClientTlsConfig>,
}
#[derive(Debug)]
pub struct TonicExporterBuilder {
pub(crate) exporter_config: ExportConfig,
pub(crate) tonic_config: TonicConfig,
pub(crate) channel: Option<tonic::transport::Channel>,
pub(crate) interceptor: Option<BoxInterceptor>,
}
pub(crate) struct BoxInterceptor(Box<dyn tonic::service::Interceptor + Send>);
impl tonic::service::Interceptor for BoxInterceptor {
fn call(&mut self, request: tonic::Request<()>) -> Result<tonic::Request<()>, tonic::Status> {
self.0.call(request)
}
}
impl Debug for BoxInterceptor {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(f, "BoxInterceptor(..)")
}
}
impl Default for TonicExporterBuilder {
fn default() -> Self {
let tonic_config = TonicConfig {
metadata: Some(MetadataMap::from_headers(
(&default_headers())
.try_into()
.expect("Invalid tonic headers"),
)),
#[cfg(feature = "tls")]
tls_config: None,
};
TonicExporterBuilder {
exporter_config: ExportConfig::default(),
tonic_config,
channel: Option::default(),
interceptor: Option::default(),
}
}
}
impl TonicExporterBuilder {
#[cfg(feature = "tls")]
pub fn with_tls_config(mut self, tls_config: ClientTlsConfig) -> Self {
self.tonic_config.tls_config = Some(tls_config);
self
}
pub fn with_metadata(mut self, metadata: MetadataMap) -> Self {
let incoming_headers = metadata.into_headers();
let mut existing_headers = self
.tonic_config
.metadata
.unwrap_or_default()
.into_headers();
existing_headers.extend(incoming_headers.into_iter());
self.tonic_config.metadata = Some(MetadataMap::from_headers(existing_headers));
self
}
pub fn with_channel(mut self, channel: tonic::transport::Channel) -> Self {
self.channel = Some(channel);
self
}
pub fn with_interceptor<I>(mut self, interceptor: I) -> Self
where
I: tonic::service::Interceptor + Send + 'static,
{
self.interceptor = Some(BoxInterceptor(Box::new(interceptor)));
self
}
}
#[cfg(test)]
mod tests {
use crate::TonicExporterBuilder;
use tonic::metadata::{MetadataMap, MetadataValue};
#[test]
fn test_with_metadata() {
let mut metadata = MetadataMap::new();
metadata.insert("foo", "bar".parse().unwrap());
let builder = TonicExporterBuilder::default().with_metadata(metadata);
let result = builder.tonic_config.metadata.unwrap();
let foo = result.get("foo").unwrap();
assert_eq!(foo, &MetadataValue::try_from("bar").unwrap());
assert!(result.get("User-Agent").is_some());
let mut metadata = MetadataMap::new();
metadata.insert("user-agent", "baz".parse().unwrap());
let builder = TonicExporterBuilder::default().with_metadata(metadata);
let result = builder.tonic_config.metadata.unwrap();
assert_eq!(
result.get("User-Agent").unwrap(),
&MetadataValue::try_from("baz").unwrap()
);
assert_eq!(
result.len(),
TonicExporterBuilder::default()
.tonic_config
.metadata
.unwrap()
.len()
);
}
}