# Programmatic configuration LLMS index: [llms.txt](/llms.txt) --- You can use the `AutoConfigurationCustomizerProvider` for programmatic configuration. Programmatic configuration is recommended for advanced use cases, which are not configurable using properties. > [!WARNING] > > `AutoConfigurationCustomizerProvider` does not work with > [declarative configuration](../declarative-configuration/). With declarative > configuration, use `DeclarativeConfigurationCustomizerProvider` instead — see > the > [agent Extension API section](/docs/zero-code/java/agent/declarative-configuration/) > 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")
}

```java 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. ```java 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 headers() { return Collections.singletonMap("Authorization", "Bearer " + refreshToken()); } private String refreshToken() { // e.g. read the token from a kubernetes secret return "token"; } } ```