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feat: implement ParticipantContextEventCoordinator (#265)
* renamed event listener impls to *EventPublisher * feat: implement ParticipantContextEventCoordinator * run ci * DEPENDENCIES
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73
...va/org/eclipse/edc/identityhub/participantcontext/ParticipantContextEventCoordinator.java
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| /* | ||
| * Copyright (c) 2024 Metaform Systems, Inc. | ||
| * | ||
| * 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: | ||
| * Metaform Systems, Inc. - initial API and implementation | ||
| * | ||
| */ | ||
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| package org.eclipse.edc.identityhub.participantcontext; | ||
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| import org.eclipse.edc.iam.did.spi.document.DidDocument; | ||
| import org.eclipse.edc.identithub.did.spi.DidDocumentService; | ||
| import org.eclipse.edc.identityhub.spi.KeyPairService; | ||
| import org.eclipse.edc.identityhub.spi.events.participant.ParticipantContextCreated; | ||
| import org.eclipse.edc.spi.event.Event; | ||
| import org.eclipse.edc.spi.event.EventEnvelope; | ||
| import org.eclipse.edc.spi.event.EventSubscriber; | ||
| import org.eclipse.edc.spi.monitor.Monitor; | ||
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| import static org.eclipse.edc.spi.result.ServiceResult.success; | ||
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| /** | ||
| * Coordinates {@link ParticipantContextCreated} events. More specifically, it coordinates the sequence, in which the following actions are performed: | ||
| * <ul> | ||
| * <li>Create DID Document</li> | ||
| * <li>Optional: publish DID document</li> | ||
| * <li>Add a KeyPair</li> | ||
| * </ul> | ||
| * To that end, the {@link ParticipantContextEventCoordinator} directly collaborates with the {@link KeyPairService} and the {@link DidDocumentService}. | ||
| * <p> | ||
| * Please note that once this initial sequence is executed, every collaborator service emits their events as per their event contract. | ||
| * For example, once a KeyPair is added, the {@link KeyPairService} will emit a {@link org.eclipse.edc.identityhub.spi.events.keypair.KeyPairAdded} event. The {@link DidDocumentService} | ||
| * can then react to this event by updating the DID Document. | ||
| */ | ||
| public class ParticipantContextEventCoordinator implements EventSubscriber { | ||
| private final Monitor monitor; | ||
| private final DidDocumentService didDocumentService; | ||
| private final KeyPairService keyPairService; | ||
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| public ParticipantContextEventCoordinator(Monitor monitor, DidDocumentService didDocumentService, KeyPairService keyPairService) { | ||
| this.monitor = monitor; | ||
| this.didDocumentService = didDocumentService; | ||
| this.keyPairService = keyPairService; | ||
| } | ||
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| @Override | ||
| public <E extends Event> void on(EventEnvelope<E> event) { | ||
| var payload = event.getPayload(); | ||
| if (payload instanceof ParticipantContextCreated createdEvent) { | ||
| var manifest = createdEvent.getManifest(); | ||
| var doc = DidDocument.Builder.newInstance() | ||
| .id(manifest.getDid()) | ||
| .service(manifest.getServiceEndpoints().stream().toList()) | ||
| // updating and adding a verification method happens as a result of the KeyPairAddedEvent | ||
| .build(); | ||
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| didDocumentService.store(doc, manifest.getParticipantId()) | ||
| .compose(u -> manifest.isActive() ? didDocumentService.publish(doc.getId()) : success()) | ||
| // adding the keypair event will cause the DidDocumentService to update the DID. | ||
| .compose(u -> keyPairService.addKeyPair(createdEvent.getParticipantId(), createdEvent.getManifest().getKey(), true)) | ||
| .onFailure(f -> monitor.warning("%s".formatted(f.getFailureDetail()))); | ||
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| } else { | ||
| monitor.warning("Received event with unexpected payload type: %s".formatted(payload.getClass())); | ||
| } | ||
| } | ||
| } |
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