Support gcs-connector 3.x in GcsUtil

CHANGES.md

@@ -62,6 +62,7 @@
 
 ## I/Os
 
+* Support gcs-connector 3.x+ in GcsUtil ([#33368](https://github.com/apache/beam/pull/33368))
 * Support for X source added (Java/Python) ([#X](https://github.com/apache/beam/issues/X)).
 
 ## New Features / Improvements

sdks/java/extensions/google-cloud-platform-core/src/main/java/org/apache/beam/sdk/extensions/gcp/util/GcsUtil.java

@@ -30,6 +30,7 @@
 import com.google.api.client.http.HttpHeaders;
 import com.google.api.client.http.HttpRequestInitializer;
 import com.google.api.client.http.HttpStatusCodes;
+import com.google.api.client.http.HttpTransport;
 import com.google.api.client.util.BackOff;
 import com.google.api.client.util.Sleeper;
 import com.google.api.services.storage.Storage;
@@ -52,6 +53,7 @@
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import java.io.FileNotFoundException;
 import java.io.IOException;
+import java.lang.reflect.Method;
 import java.nio.channels.SeekableByteChannel;
 import java.nio.channels.WritableByteChannel;
 import java.nio.file.AccessDeniedException;
@@ -739,7 +741,47 @@ public WritableByteChannel create(GcsPath path, CreateOptions options) throws IO
 
   GoogleCloudStorage createGoogleCloudStorage(
       GoogleCloudStorageOptions options, Storage storage, Credentials credentials) {
-    return new GoogleCloudStorageImpl(options, storage, credentials);
+    try {
+      return new GoogleCloudStorageImpl(options, storage, credentials);
+    } catch (NoSuchMethodError e) {
+      // gcs-connector 3.x drops the direct constructor and exclusively uses Builder
+      // TODO eliminate reflection once Beam drops Java 8 support and upgrades to gcsio 3.x
+      try {
+        final Method builderMethod = GoogleCloudStorageImpl.class.getMethod("builder");
+        Object builder = builderMethod.invoke(null);
+        final Class<?> builderClass =
+            Class.forName(
+                "com.google.cloud.hadoop.gcsio.AutoBuilder_GoogleCloudStorageImpl_Builder");
+
+        final Method setOptionsMethod =
+            builderClass.getMethod("setOptions", GoogleCloudStorageOptions.class);
+        setOptionsMethod.setAccessible(true);
+        builder = setOptionsMethod.invoke(builder, options);
+
+        final Method setHttpTransportMethod =
+            builderClass.getMethod("setHttpTransport", HttpTransport.class);
+        setHttpTransportMethod.setAccessible(true);
+        builder =
+            setHttpTransportMethod.invoke(builder, storage.getRequestFactory().getTransport());
+
+        final Method setCredentialsMethod =
+            builderClass.getMethod("setCredentials", Credentials.class);
+        setCredentialsMethod.setAccessible(true);
+        builder = setCredentialsMethod.invoke(builder, credentials);
+
+        final Method setHttpRequestInitializerMethod =
+            builderClass.getMethod("setHttpRequestInitializer", HttpRequestInitializer.class);
+        setHttpRequestInitializerMethod.setAccessible(true);
+        builder = setHttpRequestInitializerMethod.invoke(builder, httpRequestInitializer);
+
+        final Method buildMethod = builderClass.getMethod("build");
+        buildMethod.setAccessible(true);
+        return (GoogleCloudStorage) buildMethod.invoke(builder);
+      } catch (Exception reflectionError) {
+        throw new RuntimeException(
+            "Failed to construct GoogleCloudStorageImpl from gcsio 3.x Builder", reflectionError);
+      }
+    }
   }
 
   /**