DatabaseService.java

public static class DatabaseService {
    public void queryDb(String id) {
        try (Span childSpan = beeline.startChildSpan("customer-db-query")) {
            String data = getCustomerDataById(id);
            childSpan.addField("customer-data", data);
        }

    }

    public String getCustomerDataById(String id) {
        return "customer-0123";
    }
}

main.java

import io.honeycomb.beeline.tracing.Beeline;
import io.honeycomb.beeline.tracing.Span;
import io.honeycomb.beeline.tracing.SpanBuilderFactory;
import io.honeycomb.beeline.tracing.SpanPostProcessor;
import io.honeycomb.beeline.tracing.Tracer;
import io.honeycomb.beeline.tracing.Tracing;
import io.honeycomb.beeline.tracing.propagation.HttpHeaderV1PropagationCodec;
import io.honeycomb.beeline.tracing.propagation.Propagation;
import io.honeycomb.beeline.tracing.propagation.PropagationContext;
import io.honeycomb.beeline.tracing.sampling.Sampling;
import io.honeycomb.libhoney.HoneyClient;
import io.honeycomb.libhoney.LibHoney;

private DatabaseService db = new DatabaseService();

public static void main(String... args) {
    TracerSpans example = new TracerSpans();
    try {
        HttpRequest request = new HttpRequest();
        String headerValue = request.getHeader(HttpHeaderV1PropagationCodec.HONEYCOMB_TRACE_HEADER);
        PropagationContext context = Propagation.honeycombHeaderV1().decode(headerValue);

        Span rootSpan = beeline.getSpanBuilderFactory().createBuilder()
            .setSpanName("get-customer-data")
            .setServiceName("customer-db-traced")
            .setParentContext(context)
            .build();

        beeline.getTracer().startTrace(rootSpan);

        Span span = beeline.getActiveSpan();
        try {
            db.queryDb(request.getParameter("customer-id"));
            span.addField("result", "OK");
        } catch (Exception e) {
            span.addField("result", "Bad Request")
                .addField("exception-message", e.getMessage());
        }
    } finally {
        beeline.getTracer().endTrace();
        client.close(); // close to flush events and release its thread pool
    }
}

TracerSpans.java

import io.honeycomb.beeline.tracing.Beeline;
import io.honeycomb.beeline.tracing.Span;
import io.honeycomb.beeline.tracing.SpanBuilderFactory;
import io.honeycomb.beeline.tracing.SpanPostProcessor;
import io.honeycomb.beeline.tracing.Tracer;
import io.honeycomb.beeline.tracing.Tracing;
import io.honeycomb.beeline.tracing.sampling.Sampling;
import io.honeycomb.libhoney.HoneyClient;
import io.honeycomb.libhoney.LibHoney;

public class TracerSpans {
    private static final String WRITE_KEY = "test-write-key";
    private static final String DATASET = "test-dataset";

    private static final HoneyClient client;
    private static final Beeline beeline;

    static {
        client                          = LibHoney.create(LibHoney.options().setDataset(DATASET).setWriteKey(WRITE_KEY).build());
        SpanPostProcessor postProcessor = Tracing.createSpanProcessor(client, Sampling.alwaysSampler());
        SpanBuilderFactory factory      = Tracing.createSpanBuilderFactory(postProcessor, Sampling.alwaysSampler());
        Tracer tracer                   = Tracing.createTracer(factory);
        beeline                         = Tracing.createBeeline(tracer, factory);
    }
}