fix(s3 dataplane): Fix transfer of empty objects

DEPENDENCIES

@@ -1,4 +1,4 @@
 maven/mavencentral/com.apicatalog/carbon-did/0.3.0, Apache-2.0, approved, clearlydefined
 maven/mavencentral/com.apicatalog/copper-multibase/0.5.0, Apache-2.0, approved, #14501
 maven/mavencentral/com.apicatalog/copper-multicodec/0.1.1, Apache-2.0, approved, #14500
 maven/mavencentral/com.apicatalog/iron-verifiable-credentials/0.14.0, Apache-2.0, approved, clearlydefined
@@ -205,16 +205,16 @@
 maven/mavencentral/org.jetbrains/annotations/24.1.0, Apache-2.0, approved, clearlydefined
 maven/mavencentral/org.junit-pioneer/junit-pioneer/2.2.0, EPL-2.0, approved, #11857
 maven/mavencentral/org.junit.jupiter/junit-jupiter-api/5.10.2, EPL-2.0, approved, #9714
-maven/mavencentral/org.junit.jupiter/junit-jupiter-api/5.10.3, EPL-2.0, approved, #9714
+maven/mavencentral/org.junit.jupiter/junit-jupiter-api/5.11.0, EPL-2.0, approved, #15935
 maven/mavencentral/org.junit.jupiter/junit-jupiter-engine/5.10.2, EPL-2.0, approved, #9711
-maven/mavencentral/org.junit.jupiter/junit-jupiter-engine/5.10.3, EPL-2.0, approved, #9711
-maven/mavencentral/org.junit.jupiter/junit-jupiter-params/5.10.3, EPL-2.0, approved, #15250
+maven/mavencentral/org.junit.jupiter/junit-jupiter-engine/5.11.0, EPL-2.0, approved, #15939
+maven/mavencentral/org.junit.jupiter/junit-jupiter-params/5.11.0, EPL-2.0, approved, #15940
 maven/mavencentral/org.junit.platform/junit-platform-commons/1.10.2, EPL-2.0, approved, #9715
-maven/mavencentral/org.junit.platform/junit-platform-commons/1.10.3, EPL-2.0, approved, #9715
-maven/mavencentral/org.junit.platform/junit-platform-engine/1.10.3, EPL-2.0, approved, #9709
-maven/mavencentral/org.junit.platform/junit-platform-launcher/1.10.3, EPL-2.0, approved, #15216
+maven/mavencentral/org.junit.platform/junit-platform-commons/1.11.0, EPL-2.0, approved, #15936
+maven/mavencentral/org.junit.platform/junit-platform-engine/1.11.0, EPL-2.0, approved, #15932
+maven/mavencentral/org.junit.platform/junit-platform-launcher/1.11.0, EPL-2.0, approved, #15934
 maven/mavencentral/org.junit/junit-bom/5.10.2, EPL-2.0, approved, #9844
-maven/mavencentral/org.junit/junit-bom/5.10.3, EPL-2.0, approved, #9844
+maven/mavencentral/org.junit/junit-bom/5.11.0, , restricted, clearlydefined
 maven/mavencentral/org.junit/junit-bom/5.9.2, EPL-2.0, approved, #4711
 maven/mavencentral/org.jvnet.mimepull/mimepull/1.9.15, CDDL-1.1 OR GPL-2.0-only WITH Classpath-exception-2.0, approved, CQ21484
 maven/mavencentral/org.mockito/mockito-core/5.12.0, MIT AND (Apache-2.0 AND MIT) AND Apache-2.0, approved, #14678

extensions/data-plane/data-plane-aws-s3/src/main/java/org/eclipse/edc/connector/dataplane/aws/s3/S3DataSink.java

@@ -60,7 +60,7 @@ protected StreamResult<Object> transferParts(List<DataSource.Part> parts) {
 
                 var partNumber = 1;
                 byte[] bytesChunk = input.readNBytes(chunkSize);
-                while (bytesChunk.length > 0) {
+                do {
                     completedParts.add(CompletedPart.builder().partNumber(partNumber)
                             .eTag(client.uploadPart(UploadPartRequest.builder()
                                     .bucket(bucketName)
@@ -70,7 +70,7 @@ protected StreamResult<Object> transferParts(List<DataSource.Part> parts) {
                                     .build(), RequestBody.fromByteBuffer(ByteBuffer.wrap(bytesChunk))).eTag()).build());
                     bytesChunk = input.readNBytes(chunkSize);
                     partNumber++;
-                }
+                } while (bytesChunk.length > 0);
 
                 client.completeMultipartUpload(CompleteMultipartUploadRequest.builder()
                         .bucket(bucketName)
@@ -92,12 +92,16 @@ protected StreamResult<Object> transferParts(List<DataSource.Part> parts) {
     }
 
     private String getDestinationObjectName(String partName, int partsSize) {
-        var name = (partsSize == 1 && !StringUtils.isNullOrEmpty(objectName)) ? objectName : partName;
+        var name = useObjectName(partsSize) ? objectName : partName;
         if (!StringUtils.isNullOrEmpty(folderName)) {
             return folderName.endsWith("/") ? folderName + name : folderName + "/" + name;
-        } else {
-            return name;
         }
+
+        return name;
+    }
+
+    private boolean useObjectName(int partsSize) {
+        return partsSize == 1 && !StringUtils.isNullOrEmpty(objectName);
     }
 
     @NotNull

extensions/data-plane/data-plane-aws-s3/src/main/java/org/eclipse/edc/connector/dataplane/aws/s3/S3DataSource.java

@@ -28,6 +28,8 @@
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import static org.eclipse.edc.connector.dataplane.spi.pipeline.StreamFailure.Reason.GENERAL_ERROR;
@@ -107,7 +109,9 @@ private List<S3Object> fetchPrefixedS3Objects() {
 
             var response = client.listObjectsV2(listObjectsRequest);
 
-            s3Objects.addAll(response.contents());
+            Predicate<S3Object> isFile = object -> !object.key().endsWith("/");
+
+            s3Objects.addAll(response.contents().stream().filter(isFile).collect(Collectors.toList()));
 
             continuationToken = response.nextContinuationToken();
 
@@ -117,7 +121,7 @@ private List<S3Object> fetchPrefixedS3Objects() {
     }
 
     @Override
-    public void close() throws Exception {
+    public void close() {
         client.close();
     }
 

extensions/data-plane/data-plane-aws-s3/src/test/java/org/eclipse/edc/connector/dataplane/aws/s3/S3DataPlaneIntegrationTest.java

@@ -35,9 +35,11 @@
 import software.amazon.awssdk.core.ResponseBytes;
 import software.amazon.awssdk.regions.Region;
 import software.amazon.awssdk.services.s3.model.GetObjectResponse;
+import software.amazon.awssdk.services.s3.model.NoSuchKeyException;
 
 import java.util.List;
 import java.util.UUID;
+import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executors;
 import java.util.stream.Stream;
 
@@ -105,6 +107,12 @@ void should_copy_using_destination_object_name_case_single_transfer(List<String>
         var objectNameInDestination = "object-name-in-destination";
         var objectContent = UUID.randomUUID().toString();
 
+        //Put folder 0 byte size file marker. AWS does this when a folder is created via the console.
+        if (!isSingleObject) {
+            sourceClient.putStringOnBucket(sourceBucketName, OBJECT_PREFIX, "");
+            sourceClient.putStringOnBucket(sourceBucketName, OBJECT_PREFIX + "testFolder/", "");
+        }
+
         for (var objectName : objectNames) {
             sourceClient.putStringOnBucket(sourceBucketName, objectName, objectContent);
         }
@@ -152,6 +160,11 @@ void should_copy_using_destination_object_name_case_single_transfer(List<String>
                         .extracting(Long::intValue)
                         .isEqualTo(objectContent.length());
             }
+
+            assertThat(destinationClient.getObject(destinationBucketName,
+                    OBJECT_PREFIX)).failsWithin(5, SECONDS)
+                    .withThrowableOfType(ExecutionException.class)
+                    .withCauseInstanceOf(NoSuchKeyException.class);
         }
     }
 
@@ -164,6 +177,12 @@ void should_copy_to_folder_case_property_is_present(List<String> objectNames) {
         var folderNameInDestination = "folder-name-in-destination/";
         var objectBody = UUID.randomUUID().toString();
 
+        //Put folder 0 byte size file marker. AWS does this when a folder is created via the console.
+        if (!isSingleObject) {
+            sourceClient.putStringOnBucket(sourceBucketName, OBJECT_PREFIX, "");
+            sourceClient.putStringOnBucket(sourceBucketName, OBJECT_PREFIX + "testFolder/", "");
+        }
+
         for (var objectToTransfer : objectNames) {
             sourceClient.putStringOnBucket(sourceBucketName, objectToTransfer, objectBody);
         }
@@ -212,7 +231,13 @@ void should_copy_to_folder_case_property_is_present(List<String> objectNames) {
                         .extracting(Long::intValue)
                         .isEqualTo(objectBody.length());
             }
+            assertThat(destinationClient.getObject(destinationBucketName, folderNameInDestination +
+                    OBJECT_PREFIX)).failsWithin(5, SECONDS)
+                    .withThrowableOfType(ExecutionException.class)
+                    .withCauseInstanceOf(NoSuchKeyException.class);
         }
+
+
     }
 
     private DataAddress createDataAddress(List<String> assetNames, boolean isSingleObject) {

extensions/data-plane/data-plane-aws-s3/src/test/java/org/eclipse/edc/connector/dataplane/aws/s3/S3DataSinkTest.java

@@ -26,7 +26,6 @@
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.ArgumentsProvider;
 import org.junit.jupiter.params.provider.ArgumentsSource;
-import org.junit.platform.commons.util.StringUtils;
 import org.mockito.ArgumentCaptor;
 import software.amazon.awssdk.core.sync.RequestBody;
 import software.amazon.awssdk.services.s3.S3Client;
@@ -63,11 +62,6 @@ public class S3DataSinkTest {
 
     private ArgumentCaptor<CompleteMultipartUploadRequest> completeMultipartUploadRequestCaptor;
 
-    private static InputStreamDataSource createDataSource(String text) {
-        var content = StringUtils.isBlank(text) ? "test stream" : text;
-        return new InputStreamDataSource(SOURCE_OBJECT_NAME, new ByteArrayInputStream(content.getBytes(UTF_8)));
-    }
-
     @BeforeEach
     void setup() {
         s3ClientMock = mock(S3Client.class);
@@ -90,37 +84,23 @@ void setup() {
     }
 
     @ParameterizedTest
-    @ArgumentsSource(SinglePartsInputs.class)
-    void transferParts_singlePart_succeeds(List<DataSource.Part> inputStream) {
+    @ArgumentsSource(PartsInputs.class)
+    void transferParts_succeeds(List<DataSource.Part> inputStream, int expectedPartsPerObject) {
         var isSingleObject = inputStream.size() == 1;
 
         var result = dataSink.transferParts(inputStream);
         assertThat(result.succeeded()).isTrue();
         verify(s3ClientMock, times(inputStream.size())).completeMultipartUpload(completeMultipartUploadRequestCaptor
                 .capture());
 
-        var completeMultipartUploadRequest = completeMultipartUploadRequestCaptor.getValue();
-        assertThat(completeMultipartUploadRequest.bucket()).isEqualTo(BUCKET_NAME);
-        assertThat(completeMultipartUploadRequest.key())
-                .isEqualTo(isSingleObject ? DESTINATION_OBJECT_NAME : SOURCE_OBJECT_NAME);
-        assertThat(completeMultipartUploadRequest.multipartUpload().parts()).hasSize(1);
-    }
-
-    @ParameterizedTest
-    @ArgumentsSource(MultiPartsInputs.class)
-    void transferParts_multiPart_succeeds(List<DataSource.Part> inputStream) {
-        var isSingleObject = inputStream.size() == 1;
+        var completeMultipartUploadRequests = completeMultipartUploadRequestCaptor.getAllValues();
 
-        var result = dataSink.transferParts(inputStream);
-
-        assertThat(result.succeeded()).isTrue();
-        verify(s3ClientMock, times(inputStream.size()))
-                .completeMultipartUpload(completeMultipartUploadRequestCaptor.capture());
-        var completeMultipartUploadRequest = completeMultipartUploadRequestCaptor.getValue();
-        assertThat(completeMultipartUploadRequest.bucket()).isEqualTo(BUCKET_NAME);
-        assertThat(completeMultipartUploadRequest.key())
-                .isEqualTo(isSingleObject ? DESTINATION_OBJECT_NAME : SOURCE_OBJECT_NAME);
-        assertThat(completeMultipartUploadRequest.multipartUpload().parts()).hasSize(2);
+        for (var request : completeMultipartUploadRequests) {
+            assertThat(request.bucket()).isEqualTo(BUCKET_NAME);
+            assertThat(request.key())
+                    .isEqualTo(isSingleObject ? DESTINATION_OBJECT_NAME : SOURCE_OBJECT_NAME);
+            assertThat(request.multipartUpload().parts()).hasSize(expectedPartsPerObject);
+        }
     }
 
     @Test
@@ -139,7 +119,7 @@ void transferParts_failed_to_download() {
     }
 
     @ParameterizedTest
-    @ArgumentsSource(MultiPartsInputs.class)
+    @ArgumentsSource(PartsInputs.class)
     void transferParts_fails_to_upload(List<DataSource.Part> inputStream) {
         var isSingleObject = inputStream.size() == 1;
 
@@ -167,24 +147,30 @@ void transferParts_fails_to_upload(List<DataSource.Part> inputStream) {
         assertThat(result.getFailureDetail()).isEqualTo(expectedMessage);
     }
 
-    private static class SinglePartsInputs implements ArgumentsProvider {
+    private static class PartsInputs implements ArgumentsProvider {
         @Override
         public Stream<? extends Arguments> provideArguments(ExtensionContext context) {
-            var content = "content smaller than a chunk size";
-            return Stream.of(Arguments.of(List.of(createDataSource(content))),
-                    Arguments.of(List.of(createDataSource(content)), List.of(createDataSource(content)))
-            );
+            var emptyContent = "";
+            var smallContent = "content smaller than a chunk size";
+            var bigContent = "content bigger than 50 bytes chunk size so that it gets chunked and uploaded as a multipart upload";
+            return Stream.of(
+                    Arguments.of(
+                            List.of(createDataSource(emptyContent)), 1),
+                    Arguments.of(
+                            List.of(createDataSource(smallContent)), 1),
+                    Arguments.of(
+                            List.of(createDataSource(bigContent)), 2),
+                    Arguments.of(
+                            List.of(createDataSource(emptyContent), createDataSource(smallContent)), 1),
+                    Arguments.of(
+                            List.of(createDataSource(bigContent), createDataSource(bigContent)), 2));
         }
     }
 
-    private static class MultiPartsInputs implements ArgumentsProvider {
-        @Override
-        public Stream<? extends Arguments> provideArguments(ExtensionContext context) {
-            var content = "content bigger than 50 bytes chunk size so that it gets chunked and uploaded as a multipart upload";
-            return Stream.of(Arguments.of(List.of(createDataSource(content))),
-                    Arguments.of(List.of(createDataSource(content)), List.of(createDataSource(content)))
-            );
+    private static InputStreamDataSource createDataSource(String text) {
+        if (text.length() > 0) {
+            return new InputStreamDataSource(SOURCE_OBJECT_NAME, new ByteArrayInputStream(text.getBytes(UTF_8)));
         }
-
+        return new InputStreamDataSource(SOURCE_OBJECT_NAME, new ByteArrayInputStream(new byte[0]));
     }
 }