Deprecate Zipkin exporter

docs/apidiffs/current_vs_latest/opentelemetry-exporter-zipkin.txt

@@ -1,2 +1,7 @@
 Comparing source compatibility of opentelemetry-exporter-zipkin-1.59.0-SNAPSHOT.jar against opentelemetry-exporter-zipkin-1.58.0.jar
-No changes.
+===  UNCHANGED CLASS: PUBLIC FINAL io.opentelemetry.exporter.zipkin.ZipkinSpanExporter  (not serializable)
+	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
+	+++  NEW ANNOTATION: java.lang.Deprecated
+===  UNCHANGED CLASS: PUBLIC FINAL io.opentelemetry.exporter.zipkin.ZipkinSpanExporterBuilder  (not serializable)
+	===  CLASS FILE FORMAT VERSION: 52.0 <- 52.0
+	+++  NEW ANNOTATION: java.lang.Deprecated

exporters/zipkin/src/main/java/io/opentelemetry/exporter/zipkin/ZipkinSpanExporter.java

@@ -32,7 +32,12 @@
  * This class was based on the <a
  * href="https://github.com/census-instrumentation/opencensus-java/tree/c960b19889de5e4a7b25f90919d28b066590d4f0/exporters/trace/zipkin">OpenCensus
  * zipkin exporter</a> code.
+ *
+ * @deprecated Zipkin exporter is deprecated in OpenTelemetry spec (see the <a
+ *     href="https://github.com/open-telemetry/opentelemetry-specification/pull/4715">PR</a>).
+ *     Expect this artifact to no longer be published in approximately 6 months (mid 2026).
  */
+@Deprecated
 public final class ZipkinSpanExporter implements SpanExporter {
 
   public static final Logger baseLogger = Logger.getLogger(ZipkinSpanExporter.class.getName());

exporters/zipkin/src/main/java/io/opentelemetry/exporter/zipkin/ZipkinSpanExporterBuilder.java

@@ -23,7 +23,14 @@
 import zipkin2.reporter.SpanBytesEncoder;
 import zipkin2.reporter.okhttp3.OkHttpSender;
 
-/** Builder class for {@link ZipkinSpanExporter}. */
+/**
+ * Builder class for {@link ZipkinSpanExporter}.
+ *
+ * @deprecated Zipkin exporter is deprecated in OpenTelemetry spec (see the <a
+ *     href="https://github.com/open-telemetry/opentelemetry-specification/pull/4715">PR</a>).
+ *     Expect this artifact to no longer be published in approximately 6 months (mid 2026).
+ */
+@Deprecated
 public final class ZipkinSpanExporterBuilder {
   private BytesEncoder<Span> encoder = SpanBytesEncoder.JSON_V2;
   private Supplier<InetAddress> localIpAddressSupplier = LocalInetAddressSupplier.getInstance();

exporters/zipkin/src/main/java/io/opentelemetry/exporter/zipkin/internal/ZipkinSpanExporterProvider.java

@@ -5,19 +5,19 @@
 
 package io.opentelemetry.exporter.zipkin.internal;
 
-import io.opentelemetry.exporter.zipkin.ZipkinSpanExporter;
-import io.opentelemetry.exporter.zipkin.ZipkinSpanExporterBuilder;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
 import io.opentelemetry.sdk.autoconfigure.spi.traces.ConfigurableSpanExporterProvider;
 import io.opentelemetry.sdk.trace.export.SpanExporter;
 import java.time.Duration;
 
 /**
- * {@link SpanExporter} SPI implementation for {@link ZipkinSpanExporter}.
+ * {@link SpanExporter} SPI implementation for {@link
+ * io.opentelemetry.exporter.zipkin.ZipkinSpanExporter}.
  *
  * <p>This class is internal and is hence not for public use. Its APIs are unstable and can change
  * at any time.
  */
+@SuppressWarnings("deprecation")
 public class ZipkinSpanExporterProvider implements ConfigurableSpanExporterProvider {
   @Override
   public String getName() {
@@ -26,7 +26,8 @@ public String getName() {
 
   @Override
   public SpanExporter createExporter(ConfigProperties config) {
-    ZipkinSpanExporterBuilder builder = ZipkinSpanExporter.builder();
+    io.opentelemetry.exporter.zipkin.ZipkinSpanExporterBuilder builder =
+        io.opentelemetry.exporter.zipkin.ZipkinSpanExporter.builder();
 
     String endpoint = config.getString("otel.exporter.zipkin.endpoint");
     if (endpoint != null) {

exporters/zipkin/src/test/java/io/opentelemetry/exporter/zipkin/ZipkinSpanExporterEndToEndHttpTest.java

@@ -50,6 +50,7 @@
 import zipkin2.reporter.SpanBytesEncoder;
 import zipkin2.reporter.okhttp3.OkHttpSender;
 
+@SuppressWarnings("deprecation") // testing deprecated code
 @Testcontainers(disabledWithoutDocker = true)
 class ZipkinSpanExporterEndToEndHttpTest {
   private static final WebClient client = WebClient.of();

exporters/zipkin/src/test/java/io/opentelemetry/exporter/zipkin/ZipkinSpanExporterTest.java

@@ -41,6 +41,7 @@
 import zipkin2.reporter.SpanBytesEncoder;
 
 @ExtendWith(MockitoExtension.class)
+@SuppressWarnings("deprecation") // testing deprecated code
 class ZipkinSpanExporterTest {
 
   @Mock private BytesMessageSender mockSender;

exporters/zipkin/src/test/java/io/opentelemetry/exporter/zipkin/internal/ZipkinSpanExporterProviderTest.java

@@ -7,14 +7,14 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import io.opentelemetry.exporter.zipkin.ZipkinSpanExporter;
 import io.opentelemetry.sdk.autoconfigure.spi.internal.DefaultConfigProperties;
 import io.opentelemetry.sdk.trace.export.SpanExporter;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import org.junit.jupiter.api.Test;
 
+@SuppressWarnings("deprecation") // testing deprecated code
 class ZipkinSpanExporterProviderTest {
 
   private static final ZipkinSpanExporterProvider provider = new ZipkinSpanExporterProvider();
@@ -28,7 +28,8 @@ void getName() {
   void createExporter_Default() {
     try (SpanExporter spanExporter =
         provider.createExporter(DefaultConfigProperties.createFromMap(Collections.emptyMap()))) {
-      assertThat(spanExporter).isInstanceOf(ZipkinSpanExporter.class);
+      assertThat(spanExporter)
+          .isInstanceOf(io.opentelemetry.exporter.zipkin.ZipkinSpanExporter.class);
       assertThat(spanExporter)
           .extracting("sender")
           .extracting("delegate")
@@ -50,7 +51,8 @@ void createExporter_WithConfiguration() {
 
     try (SpanExporter spanExporter =
         provider.createExporter(DefaultConfigProperties.createFromMap(config))) {
-      assertThat(spanExporter).isInstanceOf(ZipkinSpanExporter.class);
+      assertThat(spanExporter)
+          .isInstanceOf(io.opentelemetry.exporter.zipkin.ZipkinSpanExporter.class);
       assertThat(spanExporter)
           .extracting("sender")
           .extracting("delegate")

sdk-extensions/autoconfigure/src/testFullConfig/java/io/opentelemetry/sdk/autoconfigure/ConfigurableSpanExporterTest.java

@@ -13,7 +13,6 @@
 import io.opentelemetry.exporter.logging.LoggingSpanExporter;
 import io.opentelemetry.exporter.otlp.internal.OtlpSpanExporterProvider;
 import io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporter;
-import io.opentelemetry.exporter.zipkin.ZipkinSpanExporter;
 import io.opentelemetry.internal.testing.CleanupExtension;
 import io.opentelemetry.sdk.autoconfigure.internal.NamedSpiManager;
 import io.opentelemetry.sdk.autoconfigure.internal.SpiHelper;
@@ -37,6 +36,7 @@
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.RegisterExtension;
 
+@SuppressWarnings("deprecation") // testing deprecated code
 class ConfigurableSpanExporterTest {
 
   @RegisterExtension CleanupExtension cleanup = new CleanupExtension();
@@ -168,7 +168,9 @@ void configureSpanProcessors_batchSpanProcessor() {
         TracerProviderConfiguration.configureSpanProcessors(
             DefaultConfigProperties.createFromMap(
                 Collections.singletonMap("otel.traces.exporter", exporterName)),
-            ImmutableMap.of(exporterName, ZipkinSpanExporter.builder().build()),
+            ImmutableMap.of(
+                exporterName,
+                io.opentelemetry.exporter.zipkin.ZipkinSpanExporter.builder().build()),
             MeterProvider.noop(),
             closeables);
     cleanup.addCloseables(closeables);
@@ -189,7 +191,7 @@ void configureSpanProcessors_multipleExporters() {
                 "otlp",
                 OtlpGrpcSpanExporter.builder().build(),
                 "zipkin",
-                ZipkinSpanExporter.builder().build()),
+                io.opentelemetry.exporter.zipkin.ZipkinSpanExporter.builder().build()),
             MeterProvider.noop(),
             closeables);
     cleanup.addCloseables(closeables);
@@ -212,7 +214,8 @@ void configureSpanProcessors_multipleExporters() {
                       spanExporters -> {
                         assertThat(spanExporters.length).isEqualTo(2);
                         assertThat(spanExporters)
-                            .hasAtLeastOneElementOfType(ZipkinSpanExporter.class)
+                            .hasAtLeastOneElementOfType(
+                                io.opentelemetry.exporter.zipkin.ZipkinSpanExporter.class)
                             .hasAtLeastOneElementOfType(OtlpGrpcSpanExporter.class);
                       });
             });
@@ -231,7 +234,7 @@ void configureSpanProcessors_multipleExportersWithLogging() {
                 "logging",
                 LoggingSpanExporter.create(),
                 "zipkin",
-                ZipkinSpanExporter.builder().build()),
+                io.opentelemetry.exporter.zipkin.ZipkinSpanExporter.builder().build()),
             MeterProvider.noop(),
             closeables);
     cleanup.addCloseables(closeables);

sdk-extensions/autoconfigure/src/testFullConfig/java/io/opentelemetry/sdk/autoconfigure/SpanExporterConfigurationTest.java

@@ -12,7 +12,6 @@
 import io.opentelemetry.exporter.logging.LoggingSpanExporter;
 import io.opentelemetry.exporter.logging.otlp.OtlpJsonLoggingSpanExporter;
 import io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporter;
-import io.opentelemetry.exporter.zipkin.ZipkinSpanExporter;
 import io.opentelemetry.sdk.autoconfigure.internal.NamedSpiManager;
 import io.opentelemetry.sdk.autoconfigure.internal.SpiHelper;
 import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
@@ -22,6 +21,7 @@
 import java.util.Collections;
 import org.junit.jupiter.api.Test;
 
+@SuppressWarnings("deprecation") // testing deprecated code
 class SpanExporterConfigurationTest {
 
   private final SpiHelper spiHelper =
@@ -42,7 +42,7 @@ void configureExporter_KnownSpiExportersOnClasspath() {
     assertThat(SpanExporterConfiguration.configureExporter("otlp", spiExportersManager))
         .isInstanceOf(OtlpGrpcSpanExporter.class);
     assertThat(SpanExporterConfiguration.configureExporter("zipkin", spiExportersManager))
-        .isInstanceOf(ZipkinSpanExporter.class);
+        .isInstanceOf(io.opentelemetry.exporter.zipkin.ZipkinSpanExporter.class);
   }
 
   @Test