scouter-tracing 0.21.1

Helper crate for tracing instrumentation
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use std::collections::HashMap;

use crate::error::TraceError;
use crate::exporter::traits::SpanExporterBuilder;
use crate::exporter::ExporterType;
use crate::utils::{OtelExportConfig, OtelProtocol};
use opentelemetry_otlp::ExportConfig as OtlpExportConfig;
use opentelemetry_otlp::SpanExporter as OtlpSpanExporter;
use opentelemetry_otlp::WithExportConfig;
use opentelemetry_otlp::WithHttpConfig;
use opentelemetry_sdk::trace::SpanExporter;
use opentelemetry_sdk::Resource;
use pyo3::prelude::*;
use scouter_types::{CompressionType, PyHelperFuncs};
use serde::Serialize;
use std::time::Duration;

#[derive(Debug, Clone, Serialize)]
#[pyclass]
pub struct HttpSpanExporter {
    #[pyo3(get)]
    pub sample_ratio: Option<f64>,

    #[pyo3(get)]
    pub batch_export: bool,

    #[pyo3(get)]
    endpoint: Option<String>,

    #[pyo3(get)]
    protocol: OtelProtocol,

    #[pyo3(get)]
    timeout: Option<u64>,

    #[pyo3(get)]
    headers: Option<HashMap<String, String>>,

    #[pyo3(get)]
    compression: Option<CompressionType>,
}

#[pymethods]
impl HttpSpanExporter {
    #[new]
    #[pyo3(signature = (batch_export=true, export_config=None,  sample_ratio=None))]
    pub fn new(
        batch_export: bool,
        export_config: Option<&OtelExportConfig>,
        sample_ratio: Option<f64>,
    ) -> Result<Self, TraceError> {
        let (endpoint, protocol, timeout, compression, headers) =
            if let Some(config) = export_config {
                (
                    config.endpoint.clone(),
                    config.protocol.clone(),
                    config.timeout,
                    config.compression.clone(),
                    config.headers.clone(),
                )
            } else {
                (None, OtelProtocol::default(), None, None, None)
            };

        Ok(Self {
            batch_export,
            sample_ratio,
            endpoint,
            protocol,
            timeout,
            compression,
            headers,
        })
    }

    pub fn __str__(&self) -> String {
        PyHelperFuncs::__str__(self)
    }
}

impl SpanExporterBuilder for HttpSpanExporter {
    type Exporter = OtlpSpanExporter;

    fn export_type(&self) -> ExporterType {
        ExporterType::Http
    }

    fn sample_ratio(&self) -> Option<f64> {
        self.sample_ratio
    }

    fn set_sample_ratio(&mut self, sample_ratio: Option<f64>) {
        self.sample_ratio = sample_ratio;
    }

    fn batch_export(&self) -> bool {
        self.batch_export
    }

    fn build_exporter(&self, resource: &Resource) -> Result<Self::Exporter, TraceError> {
        // Reconstruct the OtlpExportConfig each time
        let timeout = self.timeout.map(Duration::from_secs);
        let export_config = OtlpExportConfig {
            endpoint: self.endpoint.clone(),
            protocol: self.protocol.to_otel_protocol(),
            timeout,
        };

        let mut exporter = opentelemetry_otlp::SpanExporter::builder()
            .with_http()
            .with_export_config(export_config);

        if let Some(headers) = &self.headers {
            exporter = exporter.with_headers(headers.clone());
        }

        if let Some(compression) = &self.compression {
            exporter = exporter.with_compression(compression.to_otel_compression()?);
        }

        let mut exporter = exporter.build()?;
        exporter.set_resource(resource);

        Ok(exporter)
    }
}