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| 1 | +use std::env; |
| 2 | + |
| 3 | +use anyhow::Result; |
| 4 | +use opentelemetry::global; |
| 5 | +use opentelemetry_otlp::{LogExporter, MetricExporter, SpanExporter}; |
| 6 | +use opentelemetry_sdk::Resource; |
| 7 | +use opentelemetry_sdk::logs::BatchLogProcessor; |
| 8 | +use opentelemetry_sdk::logs::SdkLoggerProvider; |
| 9 | +use opentelemetry_sdk::metrics::{PeriodicReader, SdkMeterProvider}; |
| 10 | +use opentelemetry_sdk::trace::{BatchSpanProcessor, SdkTracerProvider}; |
| 11 | + |
| 12 | +/// dropping this struct causes the observability stack to be flushed |
| 13 | +pub struct TelemetryGuards { |
| 14 | + tracer: Option<SdkTracerProvider>, |
| 15 | + meter: Option<SdkMeterProvider>, |
| 16 | + logger: SdkLoggerProvider, |
| 17 | +} |
| 18 | + |
| 19 | +impl TelemetryGuards { |
| 20 | + /// Whether this guard even guards something lol |
| 21 | + pub fn is_guarding(&self) -> bool { |
| 22 | + self.tracer.is_some() && self.meter.is_some() |
| 23 | + } |
| 24 | +} |
| 25 | + |
| 26 | +impl Drop for TelemetryGuards { |
| 27 | + fn drop(&mut self) { |
| 28 | + if let Some(ref p) = self.tracer { |
| 29 | + let _ = p.shutdown(); |
| 30 | + } |
| 31 | + if let Some(ref p) = self.meter { |
| 32 | + let _ = p.shutdown(); |
| 33 | + } |
| 34 | + let _ = self.logger.shutdown(); |
| 35 | + } |
| 36 | +} |
| 37 | + |
| 38 | +fn is_configured() -> bool { |
| 39 | + env::var_os("OTEL_EXPORTER_OTLP_ENDPOINT").is_some() |
| 40 | + || env::var_os("OTEL_EXPORTER_OTLP_TRACES_ENDPOINT").is_some() |
| 41 | + || env::var_os("OTEL_EXPORTER_OTLP_METRICS_ENDPOINT").is_some() |
| 42 | + || env::var_os("OTEL_EXPORTER_OTLP_LOGS_ENDPOINT").is_some() |
| 43 | +} |
| 44 | + |
| 45 | +/// needs to be called before `init_logger` |
| 46 | +pub fn init(service_name: &'static str) -> Result<(TelemetryGuards, SdkLoggerProvider)> { |
| 47 | + if !is_configured() { |
| 48 | + let noop_logger = SdkLoggerProvider::builder().build(); |
| 49 | + let clone = noop_logger.clone(); |
| 50 | + return Ok(( |
| 51 | + TelemetryGuards { |
| 52 | + tracer: None, |
| 53 | + meter: None, |
| 54 | + logger: noop_logger, |
| 55 | + }, |
| 56 | + clone, |
| 57 | + )); |
| 58 | + } |
| 59 | + |
| 60 | + let resource = Resource::builder() |
| 61 | + .with_service_name(env::var("OTEL_SERVICE_NAME").unwrap_or_else(|_| service_name.to_owned())) |
| 62 | + .build(); |
| 63 | + |
| 64 | + let span_exporter = SpanExporter::builder().with_tonic().build()?; |
| 65 | + let tracer_provider = SdkTracerProvider::builder() |
| 66 | + .with_resource(resource.clone()) |
| 67 | + .with_span_processor(BatchSpanProcessor::builder(span_exporter).build()) |
| 68 | + .build(); |
| 69 | + global::set_tracer_provider(tracer_provider.clone()); |
| 70 | + |
| 71 | + let metric_exporter = MetricExporter::builder().with_tonic().build()?; |
| 72 | + let meter_provider = SdkMeterProvider::builder() |
| 73 | + .with_resource(resource.clone()) |
| 74 | + .with_reader(PeriodicReader::builder(metric_exporter).build()) |
| 75 | + .build(); |
| 76 | + global::set_meter_provider(meter_provider.clone()); |
| 77 | + |
| 78 | + let log_exporter = LogExporter::builder().with_tonic().build()?; |
| 79 | + let logger_provider = SdkLoggerProvider::builder() |
| 80 | + .with_resource(resource) |
| 81 | + .with_log_processor(BatchLogProcessor::builder(log_exporter).build()) |
| 82 | + .build(); |
| 83 | + |
| 84 | + let logger_for_bridge = logger_provider.clone(); |
| 85 | + |
| 86 | + Ok(( |
| 87 | + TelemetryGuards { |
| 88 | + tracer: Some(tracer_provider), |
| 89 | + meter: Some(meter_provider), |
| 90 | + logger: logger_provider, |
| 91 | + }, |
| 92 | + logger_for_bridge, |
| 93 | + )) |
| 94 | +} |
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