amichair commented on code in PR #2452: URL: https://github.com/apache/james-project/pull/2452#discussion_r1804600989
########## event-sourcing/event-store-jpa/src/main/java/org/apache/james/eventsourcing/eventstore/jpa/JPAEventStore.java: ########## @@ -0,0 +1,176 @@ +/**************************************************************** + * Licensed to the Apache Software Foundation (ASF) under one * + * or more contributor license agreements. See the NOTICE file * + * distributed with this work for additional information * + * regarding copyright ownership. The ASF licenses this file * + * to you under the Apache License, Version 2.0 (the * + * "License"); you may not use this file except in compliance * + * with the License. You may obtain a copy of the License at * + * * + * http://www.apache.org/licenses/LICENSE-2.0 * + * * + * Unless required by applicable law or agreed to in writing, * + * software distributed under the License is distributed on an * + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * + * KIND, either express or implied. See the License for the * + * specific language governing permissions and limitations * + * under the License. * + ****************************************************************/ +package org.apache.james.eventsourcing.eventstore.jpa; + + +import static org.apache.james.eventsourcing.eventstore.jpa.model.JPAEvent.DELETE_AGGREGATE_QUERY; +import static org.apache.james.eventsourcing.eventstore.jpa.model.JPAEvent.SELECT_AGGREGATE_QUERY; + +import java.io.IOException; +import java.util.List; +import java.util.stream.Collectors; + +import jakarta.inject.Inject; +import jakarta.persistence.EntityManager; +import jakarta.persistence.EntityManagerFactory; +import jakarta.persistence.EntityTransaction; +import jakarta.persistence.PersistenceException; +import jakarta.persistence.PersistenceUnit; + +import org.apache.james.backends.jpa.EntityManagerUtils; +import org.apache.james.eventsourcing.AggregateId; +import org.apache.james.eventsourcing.Event; +import org.apache.james.eventsourcing.eventstore.EventStore; +import org.apache.james.eventsourcing.eventstore.EventStoreFailedException; +import org.apache.james.eventsourcing.eventstore.History; +import org.apache.james.eventsourcing.eventstore.JsonEventSerializer; +import org.apache.james.eventsourcing.eventstore.jpa.model.JPAEvent; +import org.reactivestreams.Publisher; + +import com.fasterxml.jackson.core.JsonProcessingException; +import com.google.common.base.Preconditions; + +import reactor.core.publisher.Mono; +import scala.collection.Iterable; + + +public class JPAEventStore implements EventStore { + + /** + * The entity manager to access the database. + */ + private EntityManagerFactory entityManagerFactory; + + /** + * The JSON serializer to serialize the event data. + */ + private JsonEventSerializer jsonEventSerializer; + + /** + * Set the serializer to use. + */ + @Inject + public void setJsonEventSerializer(JsonEventSerializer jsonEventSerializer) { + this.jsonEventSerializer = jsonEventSerializer; + } + + /** + * Set the entity manager to use. + */ + @Inject + @PersistenceUnit(unitName = "James") + public void setEntityManagerFactory(EntityManagerFactory entityManagerFactory) { + this.entityManagerFactory = entityManagerFactory; + } + + @Override + public Publisher<Void> appendAll(Iterable<Event> events) { + if (events.isEmpty()) { + return Mono.empty(); + } + Preconditions.checkArgument(Event.belongsToSameAggregate(events)); + AggregateId aggregateId = events.head().getAggregateId(); + EntityManager entityManager = entityManagerFactory.createEntityManager(); + final EntityTransaction transaction = entityManager.getTransaction(); + try { + transaction.begin(); + events.foreach(e -> { + try { + JPAEvent jpaEvent = new JPAEvent(aggregateId, e.eventId(), jsonEventSerializer.serialize(e)); + entityManager.persist(jpaEvent); + } catch (JsonProcessingException ex) { + throw new RuntimeException(ex); + } + return e; + }); + transaction.commit(); + } catch (PersistenceException e) { + if (transaction.isActive()) { + transaction.rollback(); + } + EventStoreFailedException esfe = new EventStoreFailedException("Unable to add events"); + esfe.initCause(e); + throw esfe; + } finally { + EntityManagerUtils.safelyClose(entityManager); + } + return Mono.empty(); + } + + @Override + @SuppressWarnings("unchecked") + public Publisher<History> getEventsOfAggregate(AggregateId aggregateId) { + Preconditions.checkNotNull(aggregateId); + EntityManager entityManager = entityManagerFactory.createEntityManager(); + try { + List<Event> events = (List<Event>) entityManager.createNamedQuery(SELECT_AGGREGATE_QUERY) + .setParameter("aggregateId", aggregateId.asAggregateKey()) + .getResultStream() + .map(e -> { + try { + return jsonEventSerializer.deserialize(((JPAEvent) e).getEvent()); + } catch (IOException ex) { + throw new RuntimeException(ex); + } + }) + .collect(Collectors.toList()); + return Mono.fromSupplier(() -> History.of(events.toArray(new Event[0]))); + } catch (PersistenceException e) { + throw new RuntimeException("Unable to get events", e); + } finally { + EntityManagerUtils.safelyClose(entityManager); + } + } + + @Override + public Publisher<Void> remove(AggregateId aggregateId) { + EntityManager entityManager = entityManagerFactory.createEntityManager(); + final EntityTransaction transaction = entityManager.getTransaction(); Review Comment: done -- This is an automated message from the Apache Git Service. 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