refactor(sampling): remove resource from datadog_sampler

Author: bantonsson

datadog-opentelemetry/benches/datadog_sampling_benchmark.rs

@@ -397,14 +397,15 @@ fn bench_datadog_sampling<M: criterion::measurement::Measurement + MeasurementNa
     let configs = create_benchmark_configs();
 
     for config in configs {
-        let sampler = DatadogSampler::new(config.rules, -1, Arc::new(RwLock::new(config.resource)));
+        let sampler = DatadogSampler::new(config.rules, -1);
+        let resource = Arc::new(RwLock::new(config.resource));
         let data = OtelSamplingData::new(
             black_box(config.is_parent_sampled),
             black_box(&config.trace_id),
             black_box(config.span_name),
             black_box(config.span_kind.clone()),
             black_box(&config.attributes),
-            black_box(sampler.resource()),
+            black_box(resource.as_ref()),
         );
 
         c.bench_function(

datadog-opentelemetry/src/sampler.rs

@@ -25,6 +25,7 @@ use crate::{
 #[derive(Debug, Clone)]
 pub struct Sampler {
     sampler: DatadogSampler,
+    resource: Arc<RwLock<Resource>>,
     trace_registry: Option<TraceRegistry>,
     cfg: Arc<Config>,
 }
@@ -45,10 +46,11 @@ impl Sampler {
         trace_registry: Option<TraceRegistry>,
     ) -> Self {
         let rules = SamplingRule::from_configs(cfg.trace_sampling_rules().to_vec());
-        let sampler = DatadogSampler::new(rules, cfg.trace_rate_limit(), resource);
+        let sampler = DatadogSampler::new(rules, cfg.trace_rate_limit());
         Self {
             cfg,
             sampler,
+            resource,
             trace_registry,
         }
     }
@@ -105,7 +107,7 @@ impl ShouldSample for Sampler {
             name,
             span_kind.clone(),
             attributes,
-            self.sampler.resource(),
+            self.resource.as_ref(),
         );
         let result = self.sampler.sample(&data);
         let trace_propagation_data = if let Some(trace_root_info) =