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JaegerBackendModule.kt
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JaegerBackendModule.kt
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package misk.tracing.backends.jaeger
import com.google.inject.Provides
import com.google.inject.Singleton
import com.uber.jaeger.Configuration
import io.opentracing.Tracer
import misk.ServiceModule
import misk.config.AppName
import misk.inject.KAbstractModule
import misk.sampling.Sampler
class JaegerBackendModule(val config: JaegerBackendConfig?) : KAbstractModule() {
override fun configure() {
install(ServiceModule<JaegerTracingService>())
}
@Provides
@Singleton
fun jaegerTracer(@AppName appName: String): Tracer {
val reporter =
if (config?.reporter == null) Configuration.ReporterConfiguration()
else Configuration.ReporterConfiguration(
config.reporter.log_spans, config.reporter.agent_host,
config.reporter.agent_port, config.reporter.flush_interval_ms,
config.reporter.max_queue_size)
val sampler =
if (config?.sampler == null) Configuration.SamplerConfiguration()
else Configuration.SamplerConfiguration(
config.sampler.type, config.sampler.param, config.sampler.manager_host_port)
return Configuration(appName, sampler, reporter)
.tracerBuilder
.withScopeManager(MDCScopeManager())
.build()
}
@Provides
@Singleton
@Tracing
fun sampler(tracer: Tracer): Sampler {
val samplingRate = config?.sampler?.param ?: Configuration.SamplerConfiguration().param
return SpanSampler(tracer = tracer, samplingRate = samplingRate.toDouble())
}
}