io.opentelemetry.opencensusshim.OpenTelemetryTraceComponentImpl Maven / Gradle / Ivy
/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
package io.opentelemetry.opencensusshim;
import io.opencensus.common.Clock;
import io.opencensus.implcore.common.MillisClock;
import io.opencensus.implcore.trace.config.TraceConfigImpl;
import io.opencensus.implcore.trace.internal.RandomHandler;
import io.opencensus.trace.TraceComponent;
import io.opencensus.trace.Tracer;
import io.opencensus.trace.config.TraceConfig;
import io.opencensus.trace.config.TraceParams;
import io.opencensus.trace.export.ExportComponent;
import io.opencensus.trace.propagation.PropagationComponent;
import io.opencensus.trace.samplers.Samplers;
/**
* Implementation of the {@link TraceComponent} for OpenTelemetry migration, which uses the
* OpenTelemetry migration StartEndHandler. This class is loaded by reflection in {@link
* io.opencensus.trace.Tracing} and overrides the OpenCensus default implementation when present.
*/
public final class OpenTelemetryTraceComponentImpl extends TraceComponent {
private final PropagationComponent propagationComponent =
new OpenTelemetryPropagationComponentImpl();
private final ExportComponent noopExportComponent = ExportComponent.newNoopExportComponent();
private final Clock clock;
private final TraceConfig traceConfig = makeTraceConfig();
private final Tracer tracer;
@SuppressWarnings("unused") // Loaded via reflection
public OpenTelemetryTraceComponentImpl() {
clock = MillisClock.getInstance();
RandomHandler randomHandler = new ThreadLocalRandomHandler();
tracer = new OpenTelemetryTracerImpl(randomHandler, traceConfig);
}
@Override
public Tracer getTracer() {
return tracer;
}
@Override
public PropagationComponent getPropagationComponent() {
return propagationComponent;
}
@Override
public Clock getClock() {
return clock;
}
@Override
public ExportComponent getExportComponent() {
// Drop all OC spans, we will export converted OT spans instead
return noopExportComponent;
}
@Override
public TraceConfig getTraceConfig() {
return traceConfig;
}
private static TraceConfig makeTraceConfig() {
// Use the default TraceParams except use an always-on sampler. This defers the
// sampling decision to OpenTelemetry
TraceConfig traceConfig = new TraceConfigImpl();
traceConfig.updateActiveTraceParams(
TraceParams.DEFAULT.toBuilder().setSampler(Samplers.alwaysSample()).build());
return traceConfig;
}
}