feat: implements Signaling Data Flow Controller + first E2E test with

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extensions/control-plane/transfer/transfer-data-plane-signaling/build.gradle.kts

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+/*
+ *  Copyright (c) 2024 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Contributors:
+ *       Bayerische Motoren Werke Aktiengesellschaft (BMW AG) - initial API and implementation
+ *
+ */
+
+plugins {
+    `java-library`
+}
+
+dependencies {
+    api(project(":spi:common:core-spi"))
+    api(project(":spi:control-plane:contract-spi"))
+    api(project(":spi:control-plane:transfer-spi"))
+
+    api(project(":spi:control-plane:transfer-data-plane-spi"))
+    api(project(":spi:data-plane:data-plane-spi"))
+    api(project(":extensions:data-plane:data-plane-signaling:data-plane-signaling-client"))
+    api(project(":spi:data-plane-selector:data-plane-selector-spi"))
+
+    testImplementation(project(":core:common:junit"))
+}
+
+edcBuild {
+    swagger {
+        apiGroup.set("control-api")
+    }
+}
+
+
+

extensions/control-plane/transfer/transfer-data-plane-signaling/src/main/java/org/eclipse/edc/connector/transfer/dataplane/TransferDataPlaneSignalingExtension.java

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+/*
+ *  Copyright (c) 2024 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Contributors:
+ *       Bayerische Motoren Werke Aktiengesellschaft (BMW AG) - initial API and implementation
+ *
+ */
+
+package org.eclipse.edc.connector.transfer.dataplane;
+
+import org.eclipse.edc.connector.dataplane.selector.spi.DataPlaneSelectorService;
+import org.eclipse.edc.connector.dataplane.selector.spi.client.DataPlaneClientFactory;
+import org.eclipse.edc.connector.transfer.dataplane.flow.DataPlaneSignalingFlowController;
+import org.eclipse.edc.connector.transfer.spi.callback.ControlApiUrl;
+import org.eclipse.edc.connector.transfer.spi.flow.DataFlowManager;
+import org.eclipse.edc.runtime.metamodel.annotation.Extension;
+import org.eclipse.edc.runtime.metamodel.annotation.Inject;
+import org.eclipse.edc.runtime.metamodel.annotation.Setting;
+import org.eclipse.edc.spi.system.ServiceExtension;
+import org.eclipse.edc.spi.system.ServiceExtensionContext;
+
+import static org.eclipse.edc.connector.transfer.dataplane.TransferDataPlaneSignalingExtension.NAME;
+
+@Extension(NAME)
+public class TransferDataPlaneSignalingExtension implements ServiceExtension {
+
+    protected static final String NAME = "Transfer Data Plane Signaling Extension";
+
+    private static final String DEFAULT_DATAPLANE_SELECTOR_STRATEGY = "random";
+
+    @Setting(value = "Defines strategy for Data Plane instance selection in case Data Plane is not embedded in current runtime", defaultValue = DEFAULT_DATAPLANE_SELECTOR_STRATEGY)
+    private static final String DPF_SELECTOR_STRATEGY = "edc.dataplane.client.selector.strategy";
+    @Inject
+    private DataFlowManager dataFlowManager;
+    @Inject(required = false)
+    private ControlApiUrl callbackUrl;
+
+    @Inject
+    private DataPlaneSelectorService selectorService;
+
+    @Inject
+    private DataPlaneClientFactory clientFactory;
+
+
+    @Override
+    public void initialize(ServiceExtensionContext context) {
+        var selectionStrategy = context.getSetting(DPF_SELECTOR_STRATEGY, DEFAULT_DATAPLANE_SELECTOR_STRATEGY);
+        dataFlowManager.register(new DataPlaneSignalingFlowController(callbackUrl, selectorService, clientFactory, selectionStrategy));
+    }
+}

extensions/control-plane/transfer/transfer-data-plane-signaling/src/main/java/org/eclipse/edc/connector/transfer/dataplane/flow/DataPlaneSignalingFlowController.java

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+/*
+ *  Copyright (c) 2024 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Contributors:
+ *       Bayerische Motoren Werke Aktiengesellschaft (BMW AG) - initial API and implementation
+ *
+ */
+
+package org.eclipse.edc.connector.transfer.dataplane.flow;
+
+import org.eclipse.edc.connector.dataplane.selector.spi.DataPlaneSelectorService;
+import org.eclipse.edc.connector.dataplane.selector.spi.client.DataPlaneClientFactory;
+import org.eclipse.edc.connector.dataplane.selector.spi.instance.DataPlaneInstance;
+import org.eclipse.edc.connector.transfer.spi.callback.ControlApiUrl;
+import org.eclipse.edc.connector.transfer.spi.flow.DataFlowController;
+import org.eclipse.edc.connector.transfer.spi.types.DataFlowResponse;
+import org.eclipse.edc.connector.transfer.spi.types.TransferProcess;
+import org.eclipse.edc.policy.model.Policy;
+import org.eclipse.edc.spi.response.ResponseStatus;
+import org.eclipse.edc.spi.response.StatusResult;
+import org.eclipse.edc.spi.types.domain.asset.Asset;
+import org.eclipse.edc.spi.types.domain.transfer.DataFlowStartMessage;
+import org.eclipse.edc.spi.types.domain.transfer.FlowType;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Collection;
+import java.util.Optional;
+import java.util.Set;
+import java.util.UUID;
+import java.util.function.Predicate;
+
+import static java.util.stream.Collectors.toSet;
+
+public class DataPlaneSignalingFlowController implements DataFlowController {
+
+    private final ControlApiUrl callbackUrl;
+    private final DataPlaneSelectorService selectorClient;
+    private final DataPlaneClientFactory clientFactory;
+
+    private final String selectionStrategy;
+
+    public DataPlaneSignalingFlowController(ControlApiUrl callbackUrl, DataPlaneSelectorService selectorClient, DataPlaneClientFactory clientFactory, String selectionStrategy) {
+        this.callbackUrl = callbackUrl;
+        this.selectorClient = selectorClient;
+        this.clientFactory = clientFactory;
+        this.selectionStrategy = selectionStrategy;
+    }
+
+    @Override
+    public boolean canHandle(TransferProcess transferProcess) {
+        return extractFlowType(transferProcess).succeeded();
+    }
+
+    @Override
+    public @NotNull StatusResult<DataFlowResponse> start(TransferProcess transferProcess, Policy policy) {
+        var flowType = extractFlowType(transferProcess);
+        if (flowType.failed()) {
+            return StatusResult.failure(ResponseStatus.FATAL_ERROR, flowType.getFailureDetail());
+        }
+
+        var dataPlaneInstance = selectorClient.select(transferProcess.getContentDataAddress(), transferProcess.getDataDestination(), selectionStrategy, transferProcess.getTransferType());
+        var dataFlowRequest = DataFlowStartMessage.Builder.newInstance()
+                .id(UUID.randomUUID().toString())
+                .processId(transferProcess.getId())
+                .sourceDataAddress(transferProcess.getContentDataAddress())
+                .destinationDataAddress(transferProcess.getDataDestination())
+                .participantId(policy.getAssignee())
+                .agreementId(transferProcess.getContractId())
+                .assetId(transferProcess.getAssetId())
+                .flowType(flowType.getContent())
+                .callbackAddress(callbackUrl != null ? callbackUrl.get() : null)
+                .build();
+
+        var dataPlaneInstanceId = dataPlaneInstance != null ? dataPlaneInstance.getId() : null;
+
+        return clientFactory.createClient(dataPlaneInstance)
+                .start(dataFlowRequest)
+                .map(it -> DataFlowResponse.Builder.newInstance()
+                        .dataAddress(it.getDataAddress())
+                        .dataPlaneId(dataPlaneInstanceId)
+                        .build()
+                );
+    }
+
+    @Override
+    public StatusResult<Void> terminate(TransferProcess transferProcess) {
+        return selectorClient.getAll().stream()
+                .filter(dataPlaneInstanceFilter(transferProcess))
+                .map(clientFactory::createClient)
+                .map(client -> client.terminate(transferProcess.getId()))
+                .reduce(StatusResult::merge)
+                .orElse(StatusResult.failure(ResponseStatus.FATAL_ERROR, "Failed to select the data plane for terminating the transfer process %s".formatted(transferProcess.getId())));
+    }
+
+    @Override
+    public Set<String> transferTypesFor(Asset asset) {
+        return selectorClient.getAll().stream()
+                .filter(it -> it.getAllowedSourceTypes().contains(asset.getDataAddress().getType()))
+                .map(DataPlaneInstance::getAllowedTransferTypes)
+                .flatMap(Collection::stream)
+                .collect(toSet());
+    }
+
+    private StatusResult<FlowType> extractFlowType(TransferProcess transferProcess) {
+        return Optional.ofNullable(transferProcess.getTransferType())
+                .map(transferType -> transferType.split("-"))
+                .filter(tokens -> tokens.length == 2)
+                .map(tokens -> parseFlowType(tokens[1]))
+                .orElse(StatusResult.failure(ResponseStatus.FATAL_ERROR, "Failed to extract flow type from transferType %s".formatted(transferProcess.getTransferType())));
+
+    }
+
+    private StatusResult<FlowType> parseFlowType(String flowType) {
+        try {
+            return StatusResult.success(FlowType.valueOf(flowType));
+        } catch (Exception e) {
+            return StatusResult.failure(ResponseStatus.FATAL_ERROR, "Unknown flow type %s".formatted(flowType));
+        }
+    }
+
+    private Predicate<DataPlaneInstance> dataPlaneInstanceFilter(TransferProcess transferProcess) {
+        if (transferProcess.getDataPlaneId() != null) {
+            return (dataPlaneInstance -> dataPlaneInstance.getId().equals(transferProcess.getDataPlaneId()));
+        } else {
+            return (d) -> true;
+        }
+    }
+}

extensions/control-plane/transfer/transfer-data-plane-signaling/src/main/resources/META-INF/services/org.eclipse.edc.spi.system.ServiceExtension

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+#
+#  Copyright (c) 2024 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+#
+#  This program and the accompanying materials are made available under the
+#  terms of the Apache License, Version 2.0 which is available at
+#  https://www.apache.org/licenses/LICENSE-2.0
+#
+#  SPDX-License-Identifier: Apache-2.0
+#
+#  Contributors:
+#       Bayerische Motoren Werke Aktiengesellschaft (BMW AG) - initial API and implementation
+#
+#
+
+org.eclipse.edc.connector.transfer.dataplane.TransferDataPlaneSignalingExtension

extensions/control-plane/transfer/transfer-data-plane-signaling/src/test/java/org/eclipse/edc/connector/transfer/dataplane/TransferDataPlaneSignalingExtensionTest.java

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+/*
+ *  Copyright (c) 2024 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+ *
+ *  This program and the accompanying materials are made available under the
+ *  terms of the Apache License, Version 2.0 which is available at
+ *  https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Contributors:
+ *       Bayerische Motoren Werke Aktiengesellschaft (BMW AG) - initial API and implementation
+ *
+ */
+
+package org.eclipse.edc.connector.transfer.dataplane;
+
+import org.eclipse.edc.connector.transfer.dataplane.flow.DataPlaneSignalingFlowController;
+import org.eclipse.edc.connector.transfer.spi.flow.DataFlowManager;
+import org.eclipse.edc.junit.extensions.DependencyInjectionExtension;
+import org.eclipse.edc.spi.system.ServiceExtensionContext;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import static org.mockito.ArgumentMatchers.isA;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+@ExtendWith(DependencyInjectionExtension.class)
+class TransferDataPlaneSignalingExtensionTest {
+
+    private final DataFlowManager dataFlowManager = mock();
+
+    @BeforeEach
+    void setup(ServiceExtensionContext context) {
+        context.registerService(DataFlowManager.class, dataFlowManager);
+    }
+
+    @Test
+    void initialize(ServiceExtensionContext context, TransferDataPlaneSignalingExtension extension) {
+        extension.initialize(context);
+        verify(dataFlowManager).register(isA(DataPlaneSignalingFlowController.class));
+    }
+}