opentelemetry.io/content/en/docs/languages/java/exporters.md

title	weight	cSpell:ignore
Exporters	50	okhttp

{{% docs/languages/exporters/intro java %}}

Dependencies

If you want to send telemetry data to an OTLP endpoint (like the OpenTelemetry Collector, Jaeger or Prometheus), there are multiple OTLP options available, each catering to different use cases. For most users, the default artifact will suffice and be the most simple:

{{< tabpane text=true >}} {{% tab Gradle %}}

dependencies {
    implementation 'io.opentelemetry:opentelemetry-exporter-otlp:{{% param vers.otel %}}'
}

{{% /tab %}} {{% tab Maven %}}

<project>
    <dependencies>
        <dependency>
            <groupId>io.opentelemetry</groupId>
            <artifactId>opentelemetry-exporter-otlp</artifactId>
        </dependency>
    </dependencies>
</project>

{{< /tab >}} {{< /tabpane>}}

Under the hood, there are two protocol options supported, each with different "sender" implementations.

• grpc - gRPC implementation of OTLP exporters, represented by OtlpGrpcSpanExporter, OtlpGrpcMetricExporter, OtlpGrpcLogRecordExporter.
• http/protobuf - HTTP with protobuf encoded payload implementation of OTLP exporters, represented by OtlpHttpSpanExporter, OtlpHttpMetricExporter, OtlpHttpLogRecordExporter.

A sender is an abstraction which allows different gRPC / HTTP client implementations to fulfill the OTLP contract. Regardless of the sender implementation, the same exporter classes are used. A sender implementation is automatically used when it is detected on the classpath. The sender implementations are described in detail below:

• {groupId}:{artifactId} - Sender description.
• io.opentelemetry:opentelemetry-exporter-sender-okhttp - The default sender, included automatically with opentelemetry-exporter-otlp and bundled with the OpenTelemetry Java agent. This includes an OkHttp based implementation for both the grpc and http/protobuf versions of the protocol, and will be suitable for most users. However, OkHttp has a transitive dependency on kotlin which is problematic in some environments.
• io.opentelemetry:opentelemetry-exporter-sender-jdk - This sender includes a JDK 11+ HttpClient based implementation for the http/protobuf version of the protocol. It requires zero additional dependencies, but requires Java 11+. To use, include the artifact and explicitly exclude the default io.opentelemetry:opentelemetry-exporter-sender-okhttp dependency.
• io.opentelemetry:opentelemetry-exporter-sender-grpc-managed-channel - This sender includes a grpc-java based implementation for the grpc version of the protocol. To use, include the artifact, explicitly exclude the default io.opentelemetry:opentelemetry-exporter-sender-okhttp dependency, and include one of the gRPC transport implementations.

Usage

Next, configure the exporter to point at an OTLP endpoint.

If you use SDK autoconfiguration all you need to do is update your environment variables:

env OTEL_EXPORTER_OTLP_ENDPOINT=http://example:4317 java -jar ./build/libs/java-simple.jar

Note, that in the case of exporting via OTLP you do not need to set OTEL_TRACES_EXPORTER, OTEL_METRICS_EXPORTER and OTEL_LOGS_EXPORTER since otlp is their default value

In the case of [manual configuration] you can update the example app like the following:

package otel;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.Banner;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

import io.opentelemetry.api.OpenTelemetry;
import io.opentelemetry.api.common.Attributes;
import io.opentelemetry.api.trace.propagation.W3CTraceContextPropagator;
import io.opentelemetry.context.propagation.ContextPropagators;
import io.opentelemetry.exporter.otlp.metrics.OtlpGrpcMetricExporter;
import io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporter;
import io.opentelemetry.exporter.otlp.logs.OtlpGrpcLogRecordExporter;
import io.opentelemetry.sdk.OpenTelemetrySdk;
import io.opentelemetry.sdk.metrics.SdkMeterProvider;
import io.opentelemetry.sdk.metrics.export.PeriodicMetricReader;
import io.opentelemetry.sdk.resources.Resource;
import io.opentelemetry.sdk.trace.SdkTracerProvider;
import io.opentelemetry.sdk.trace.export.BatchSpanProcessor;
import io.opentelemetry.sdk.logs.export.BatchLogRecordProcessor;
import io.opentelemetry.sdk.logs.SdkLoggerProvider;
import io.opentelemetry.sdk.logs.export.LogRecordExporter;
import io.opentelemetry.semconv.resource.attributes.ResourceAttributes;

@SpringBootApplication
public class DiceApplication {
  public static void main(String[] args) {
    SpringApplication app = new SpringApplication(DiceApplication.class);
    app.setBannerMode(Banner.Mode.OFF);
    app.run(args);
  }

  @Bean
  public OpenTelemetry openTelemetry() {
    Resource resource = Resource.getDefault().toBuilder().put(SERVICE_NAME, "dice-server").put(SERVICE_VERSION, "0.1.0").build();

    SdkTracerProvider sdkTracerProvider = SdkTracerProvider.builder()
            .addSpanProcessor(BatchSpanProcessor.builder(OtlpGrpcSpanExporter.builder().build()).build())
            .setResource(resource)
            .build();

    SdkMeterProvider sdkMeterProvider = SdkMeterProvider.builder()
            .registerMetricReader(PeriodicMetricReader.builder(OtlpGrpcMetricExporter.builder().build()).build())
            .setResource(resource)
            .build();

    SdkLoggerProvider sdkLoggerProvider = SdkLoggerProvider.builder()
            .addLogRecordProcessor(
                    BatchLogRecordProcessor.builder(OtlpGrpcLogRecordExporter.builder().build()).build())
            .setResource(resource)
            .build();

    OpenTelemetry openTelemetry = OpenTelemetrySdk.builder()
        .setTracerProvider(sdkTracerProvider)
        .setMeterProvider(sdkMeterProvider)
        .setLoggerProvider(sdkLoggerProvider)
        .setPropagators(ContextPropagators.create(W3CTraceContextPropagator.getInstance()))
        .buildAndRegisterGlobal();

    return openTelemetry;
  }
}

Console

To debug your instrumentation or see the values locally in development, you can use exporters writing telemetry data to the console (stdout).

If you followed the Getting Started or Manual Instrumentation guides, you already have the console exporter installed.

The LoggingSpanExporter, the LoggingMetricExporter and the SystemOutLogRecordExporter are included in the opentelemetry-exporter-logging artifact.

If you use SDK autoconfiguration all you need to do is update your environment variables:

env OTEL_TRACES_EXPORTER=logging OTEL_METRICS_EXPORTER=logging OTEL_LOGS_EXPORTER=logging  java -jar ./build/libs/java-simple.jar

{{% docs/languages/exporters/jaeger %}}

{{% docs/languages/exporters/prometheus-setup %}}

Dependencies

Install the opentelemetry-exporter-prometheus artifact as a dependency for your application:

{{< tabpane text=true >}} {{% tab Gradle %}}

dependencies {
    implementation 'io.opentelemetry:opentelemetry-exporter-prometheus:{{% param vers.otel %}}-alpha'
}

{{% /tab %}} {{% tab Maven %}}

<project>
    <dependencies>
        <dependency>
            <groupId>io.opentelemetry</groupId>
            <artifactId>opentelemetry-exporter-prometheus</artifactId>
        </dependency>
    </dependencies>
</project>

{{< /tab >}} {{< /tabpane>}}

Update your OpenTelemetry configuration to use the exporter and to send data to your Prometheus backend:

import io.opentelemetry.exporter.prometheus.PrometheusHttpServer;

int prometheusPort = 9464;
SdkMeterProvider sdkMeterProvider = SdkMeterProvider.builder()
        .registerMetricReader(PrometheusHttpServer.builder().setPort(prometheusPort).build())
        .setResource(resource)
        .build();

With the above you can access your metrics at http://localhost:9464/metrics. Prometheus or an OpenTelemetry Collector with the Prometheus receiver can scrape the metrics from this endpoint.

{{% docs/languages/exporters/zipkin-setup %}}

Dependencies

To send your trace data to Zipkin, you can use the ZipkinSpanExporter.

Install the opentelemetry-exporter-zipkin artifact as a dependency for your application:

{{< tabpane text=true >}} {{% tab Gradle %}}

dependencies {
    implementation 'io.opentelemetry:opentelemetry-exporter-zipkin:{{% param vers.otel %}}-alpha'
}

{{% /tab %}} {{% tab Maven %}}

<project>
    <dependencies>
        <dependency>
            <groupId>io.opentelemetry</groupId>
            <artifactId>opentelemetry-exporter-zipkin</artifactId>
        </dependency>
    </dependencies>
</project>

{{< /tab >}} {{< /tabpane>}}

Update your OpenTelemetry configuration to use the exporter and to send data to your Zipkin backend:

import io.opentelemetry.exporter.zipkin.ZipkinSpanExporter;

SdkTracerProvider sdkTracerProvider = SdkTracerProvider.builder()
        .addSpanProcessor(BatchSpanProcessor.builder(ZipkinSpanExporter.builder().setEndpoint("http://localhost:9411/api/v2/spans").build()).build())
        .setResource(resource)
        .build();

{{% docs/languages/exporters/outro java "https://javadoc.io/doc/io.opentelemetry/opentelemetry-sdk-trace/latest/io/opentelemetry/sdk/trace/export/SpanExporter.html" %}}

{{< tabpane text=true >}} {{% tab Batch %}}

import io.opentelemetry.sdk.trace.export.BatchSpanProcessor;
import io.opentelemetry.sdk.logs.export.BatchLogRecordProcessor;

SdkTracerProvider sdkTracerProvider = SdkTracerProvider.builder()
        .addSpanProcessor(BatchSpanProcessor.builder(...).build())
        .setResource(resource)
        .build();

SdkLoggerProvider sdkLoggerProvider = SdkLoggerProvider.builder()
        .addLogRecordProcessor(
                BatchLogRecordProcessor.builder(...).build())
        .setResource(resource)
        .build();

{{% /tab %}} {{% tab Simple %}}

import io.opentelemetry.sdk.trace.export.SimpleSpanProcessor;
import io.opentelemetry.sdk.logs.export.SimpleLogRecordProcessor;

SdkTracerProvider sdkTracerProvider = SdkTracerProvider.builder()
        .addSpanProcessor(SimpleSpanProcessor.builder(...).build())
        .setResource(resource)
        .build();

SdkLoggerProvider sdkLoggerProvider = SdkLoggerProvider.builder()
        .addLogRecordProcessor(
                SimpleLogRecordProcessor.builder(...).build())
        .setResource(resource)
        .build();

{{< /tab >}} {{< /tabpane>}}

{{% /docs/languages/exporters/outro %}}