Added method to customize x-build-info

core/src/main/java/tech/ydb/core/grpc/GrpcTransportBuilder.java

@@ -78,6 +78,9 @@ public enum InitMode {
     private final List<Consumer<? super ManagedChannelBuilder<?>>> channelInitializers = new ArrayList<>();
     private Supplier<ScheduledExecutorService> schedulerFactory = YdbSchedulerFactory::createScheduler;
     private String localDc;
+    private String buildInfo = Version.getVersion().map(version -> "ydb-java-sdk/" + version)
+            .orElse(Version.UNKNOWN_VERSION);
+
     private BalancingSettings balancingSettings;
     private Executor callExecutor = MoreExecutors.directExecutor();
     private AuthRpcProvider<? super GrpcAuthRpc> authProvider = NopAuthProvider.INSTANCE;
@@ -124,10 +127,13 @@ public String getDatabase() {
         return database;
     }
 
+    @Deprecated
     public String getVersionString() {
-        return Version.getVersion()
-                .map(version -> "ydb-java-sdk/" + version)
-                .orElse(Version.UNKNOWN_VERSION);
+        return getBuildInfo();
+    }
+
+    public String getBuildInfo() {
+        return buildInfo;
     }
 
     public String getApplicationName() {
@@ -423,6 +429,21 @@ public GrpcTransportBuilder withTracer(Tracer tracer) {
         return this;
     }
 
+    /**
+     * Appends an extra build info string to the SDK build info reported to the server via the
+     * {@code x-ydb-sdk-build-info} header. The provided value is concatenated to the existing build info using
+     * a semicolon separator and is typically used to identify higher-level libraries or integrations built on top
+     * of the SDK (for example, {@code "ydb-jdbc-driver/2.4.0"}).
+     *
+     * @param extraBuildInfo additional build info to append to the SDK build info
+     * @return this builder instance
+     */
+    public GrpcTransportBuilder withExtraBuildInfo(String extraBuildInfo) {
+        Objects.requireNonNull(extraBuildInfo, "extraBuildInfo is null");
+        this.buildInfo = this.buildInfo + ";" + extraBuildInfo;
+        return this;
+    }
+
     /**
      * use {@link GrpcTransportBuilder#withGrpcRetry(boolean) } instead
      * @return this

core/src/main/java/tech/ydb/core/grpc/YdbHeaders.java

@@ -41,7 +41,7 @@ private YdbHeaders() { }
     public static ClientInterceptor createMetadataInterceptor(GrpcTransportBuilder builder) {
         Metadata extraHeaders = new Metadata();
         extraHeaders.put(YdbHeaders.DATABASE, builder.getDatabase());
-        extraHeaders.put(YdbHeaders.BUILD_INFO, builder.getVersionString());
+        extraHeaders.put(YdbHeaders.BUILD_INFO, builder.getBuildInfo());
         String appName = builder.getApplicationName();
         if (appName != null) {
             extraHeaders.put(YdbHeaders.APPLICATION_NAME, appName);

core/src/test/java/tech/ydb/core/impl/pool/DefaultChannelFactoryTest.java

@@ -154,6 +154,21 @@ public void customHeadersTest() {
         Assert.assertEquals("client-hostname", metadata.get(YdbHeaders.CLIENT_PROCESS_ID));
     }
 
+    @Test
+    public void customBuildInfoTest() {
+        GrpcTransportBuilder builder = GrpcTransport.forHost(MOCKED_HOST, MOCKED_PORT, "/Root")
+                .withExtraBuildInfo("driver/1.0.0")
+                .withExtraBuildInfo("test-app/1.0.0");
+        ManagedChannelFactory factory = ChannelFactoryLoader.load().buildFactory(builder);
+
+        Assert.assertSame(channelMock, factory.newManagedChannel(MOCKED_HOST, MOCKED_PORT, null));
+        channelStaticMock.verify(FOR_ADDRESS, Mockito.times(1));
+
+        String version = "ydb-java-sdk/" + Version.getVersion().get();
+        Metadata metadata = metadataCapture.getValue();
+        Assert.assertEquals(version + ";driver/1.0.0;test-app/1.0.0", metadata.get(YdbHeaders.BUILD_INFO));
+    }
+
     @Test
     public void customChannelInitializer() {
         GrpcTransportBuilder builder = GrpcTransport.forHost(MOCKED_HOST, MOCKED_PORT, "/Root")

core/src/test/java/tech/ydb/core/impl/pool/EndpointPoolTest.java

@@ -24,7 +24,6 @@
 import tech.ydb.core.UnexpectedResultException;
 import tech.ydb.core.grpc.BalancingSettings;
 import tech.ydb.core.grpc.GrpcRequestSettings;
-import tech.ydb.core.timer.TestTicker;
 
 /**
  * @author Aleksandr Gorshenin

core/src/test/java/tech/ydb/core/impl/pool/PriorityPickerTest.java

@@ -13,7 +13,6 @@
 import org.junit.Test;
 
 import tech.ydb.core.grpc.BalancingSettings;
-import tech.ydb.core.timer.TestTicker;
 
 /**
  * @author Kirill

core/src/test/java/tech/ydb/core/timer/TestTicker.java → core/src/test/java/tech/ydb/core/impl/pool/TestTicker.java

@@ -1,4 +1,4 @@
-package tech.ydb.core.timer;
+package tech.ydb.core.impl.pool;
 
 import java.util.Arrays;
 import java.util.Iterator;