Programmatic configuration
You can use the AutoConfigurationCustomizerProvider for programmatic
configuration. Programmatic configuration is recommended for advanced use cases,
which are not configurable using properties.
AutoConfigurationCustomizerProvider does not work with
declarative configuration. With declarative
configuration, use DeclarativeConfigurationCustomizerProvider instead — see
the
agent Extension API section
for details and examples.
Exclude actuator endpoints from tracing
As an example, you can customize the sampler to exclude health check endpoints from tracing:
<dependencies>
<dependency>
<groupId>io.opentelemetry.contrib</groupId>
<artifactId>opentelemetry-samplers</artifactId>
<version>1.54.0-alpha</version>
</dependency>
</dependencies>
dependencies {
implementation("io.opentelemetry.contrib:opentelemetry-samplers:1.54.0-alpha")
}
package otel;
import io.opentelemetry.api.trace.SpanKind;
import io.opentelemetry.contrib.sampler.RuleBasedRoutingSampler;
import io.opentelemetry.sdk.autoconfigure.spi.AutoConfigurationCustomizerProvider;
import io.opentelemetry.semconv.UrlAttributes;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class FilterPaths {
@Bean
public AutoConfigurationCustomizerProvider otelCustomizer() {
return p ->
p.addSamplerCustomizer(
(fallback, config) ->
RuleBasedRoutingSampler.builder(SpanKind.SERVER, fallback)
.drop(UrlAttributes.URL_PATH, "^/actuator")
.build());
}
}
Configure the exporter programmatically
You can also configure OTLP exporters programmatically. This configuration replaces the default OTLP exporter and adds a custom header to the requests.
package otel;
import io.opentelemetry.exporter.otlp.http.trace.OtlpHttpSpanExporter;
import io.opentelemetry.sdk.autoconfigure.spi.AutoConfigurationCustomizerProvider;
import java.util.Collections;
import java.util.Map;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class CustomAuth {
@Bean
public AutoConfigurationCustomizerProvider otelCustomizer() {
return p ->
p.addSpanExporterCustomizer(
(exporter, config) -> {
if (exporter instanceof OtlpHttpSpanExporter) {
return ((OtlpHttpSpanExporter) exporter)
.toBuilder().setHeaders(this::headers).build();
}
return exporter;
});
}
private Map<String, String> headers() {
return Collections.singletonMap("Authorization", "Bearer " + refreshToken());
}
private String refreshToken() {
// e.g. read the token from a kubernetes secret
return "token";
}
}
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