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JAMES-2433 Implement EventStore for a JPA backend
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<?xml version="1.0" encoding="UTF-8"?> | ||
<!-- | ||
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. | ||
--> | ||
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> | ||
<modelVersion>4.0.0</modelVersion> | ||
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<parent> | ||
<groupId>org.apache.james</groupId> | ||
<artifactId>event-sourcing</artifactId> | ||
<version>3.9.0-SNAPSHOT</version> | ||
</parent> | ||
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<artifactId>event-sourcing-event-store-jpa</artifactId> | ||
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<name>Apache James :: Event sourcing :: Event Store :: JPA</name> | ||
<description>JPA implementation for James Event Store</description> | ||
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<dependencies> | ||
<dependency> | ||
<groupId>${james.groupId}</groupId> | ||
<artifactId>apache-james-backends-jpa</artifactId> | ||
</dependency> | ||
<dependency> | ||
<groupId>${james.groupId}</groupId> | ||
<artifactId>apache-james-backends-jpa</artifactId> | ||
<type>test-jar</type> | ||
<scope>test</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>${james.groupId}</groupId> | ||
<artifactId>event-sourcing-core</artifactId> | ||
<scope>test</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>${james.groupId}</groupId> | ||
<artifactId>event-sourcing-core</artifactId> | ||
<type>test-jar</type> | ||
<scope>test</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>${james.groupId}</groupId> | ||
<artifactId>event-sourcing-event-store-api</artifactId> | ||
</dependency> | ||
<dependency> | ||
<groupId>${james.groupId}</groupId> | ||
<artifactId>event-sourcing-event-store-api</artifactId> | ||
<type>test-jar</type> | ||
<scope>test</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>${james.groupId}</groupId> | ||
<artifactId>event-sourcing-pojo</artifactId> | ||
<type>test-jar</type> | ||
<scope>test</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>${james.groupId}</groupId> | ||
<artifactId>testing-base</artifactId> | ||
<scope>test</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>io.projectreactor</groupId> | ||
<artifactId>reactor-core</artifactId> | ||
</dependency> | ||
<dependency> | ||
<groupId>org.apache.derby</groupId> | ||
<artifactId>derby</artifactId> | ||
<scope>test</scope> | ||
</dependency> | ||
<dependency> | ||
<groupId>org.mockito</groupId> | ||
<artifactId>mockito-core</artifactId> | ||
<scope>test</scope> | ||
</dependency> | ||
</dependencies> | ||
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<build> | ||
<plugins> | ||
<plugin> | ||
<groupId>org.apache.openjpa</groupId> | ||
<artifactId>openjpa-maven-plugin</artifactId> | ||
<version>${apache.openjpa.version}</version> | ||
<configuration> | ||
<includes>org/apache/james/eventsourcing/eventstore/jpa/model/JPAEvent.class</includes> | ||
<addDefaultConstructor>true</addDefaultConstructor> | ||
<enforcePropertyRestrictions>true</enforcePropertyRestrictions> | ||
<toolProperties> | ||
<property> | ||
<name>log</name> | ||
<value>TOOL=TRACE</value> | ||
</property> | ||
<property> | ||
<name>metaDataFactory</name> | ||
<value>jpa(Types=org.apache.james.eventsourcing.eventstore.jpa.model.JPAEvent)</value> | ||
</property> | ||
</toolProperties> | ||
<persistenceXmlFile>${basedir}/src/test/resources/persistence.xml</persistenceXmlFile> | ||
</configuration> | ||
<executions> | ||
<execution> | ||
<id>enhancer</id> | ||
<goals> | ||
<goal>enhance</goal> | ||
</goals> | ||
<phase>process-classes</phase> | ||
</execution> | ||
</executions> | ||
</plugin> | ||
</plugins> | ||
</build> | ||
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</project> |
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...-store-jpa/src/main/java/org/apache/james/eventsourcing/eventstore/jpa/JPAEventStore.java
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/**************************************************************** | ||
* 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; | ||
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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; | ||
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import java.io.IOException; | ||
import java.util.List; | ||
import java.util.stream.Collectors; | ||
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import jakarta.inject.Inject; | ||
import jakarta.persistence.EntityManager; | ||
import jakarta.persistence.EntityManagerFactory; | ||
import jakarta.persistence.EntityTransaction; | ||
import jakarta.persistence.PersistenceException; | ||
import jakarta.persistence.PersistenceUnit; | ||
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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; | ||
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import com.fasterxml.jackson.core.JsonProcessingException; | ||
import com.google.common.annotations.VisibleForTesting; | ||
import com.google.common.base.Preconditions; | ||
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import reactor.core.publisher.Mono; | ||
import scala.collection.Iterable; | ||
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public class JPAEventStore implements EventStore { | ||
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/** | ||
* The entity manager to access the database. | ||
*/ | ||
private EntityManagerFactory entityManagerFactory; | ||
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/** | ||
* The JSON serializer to serialize the event data. | ||
*/ | ||
private JsonEventSerializer jsonEventSerializer; | ||
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/** | ||
* Set the serializer to use. | ||
*/ | ||
@Inject | ||
public void setJsonEventSerializer(JsonEventSerializer jsonEventSerializer) { | ||
this.jsonEventSerializer = jsonEventSerializer; | ||
} | ||
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/** | ||
* Set the entity manager to use. | ||
*/ | ||
@Inject | ||
@PersistenceUnit(unitName = "James") | ||
public void setEntityManagerFactory(EntityManagerFactory entityManagerFactory) { | ||
this.entityManagerFactory = entityManagerFactory; | ||
} | ||
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@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(); | ||
} | ||
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@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); | ||
} | ||
} | ||
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@Override | ||
public Publisher<Void> remove(AggregateId aggregateId) { | ||
EntityManager entityManager = entityManagerFactory.createEntityManager(); | ||
final EntityTransaction transaction = entityManager.getTransaction(); | ||
try { | ||
transaction.begin(); | ||
entityManager.createNamedQuery(DELETE_AGGREGATE_QUERY) | ||
.setParameter("aggregateId", aggregateId.asAggregateKey()) | ||
.executeUpdate(); | ||
transaction.commit(); | ||
} catch (PersistenceException e) { | ||
if (transaction.isActive()) { | ||
transaction.rollback(); | ||
} | ||
throw new RuntimeException("Unable to remove events", e); | ||
} finally { | ||
EntityManagerUtils.safelyClose(entityManager); | ||
} | ||
return Mono.empty(); | ||
} | ||
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@VisibleForTesting | ||
protected void removeAll() { | ||
EntityManager entityManager = entityManagerFactory.createEntityManager(); | ||
final EntityTransaction transaction = entityManager.getTransaction(); | ||
try { | ||
transaction.begin(); | ||
entityManager.createQuery("DELETE FROM JPAEvent").executeUpdate(); | ||
transaction.commit(); | ||
} catch (PersistenceException e) { | ||
throw new RuntimeException("Unable to clear table", e); | ||
} finally { | ||
EntityManagerUtils.safelyClose(entityManager); | ||
} | ||
} | ||
} |
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