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Module providing support for auto-configuration of Axon Framework through Spring Boot.
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/*
 * Copyright (c) 2010-2017. Axon Framework
 * Licensed 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.axonframework.boot.autoconfig;

import org.axonframework.boot.util.RegisterDefaultEntities;
import org.axonframework.common.jdbc.PersistenceExceptionResolver;
import org.axonframework.common.jpa.ContainerManagedEntityManagerProvider;
import org.axonframework.common.jpa.EntityManagerProvider;
import org.axonframework.common.transaction.TransactionManager;
import org.axonframework.eventhandling.saga.repository.SagaStore;
import org.axonframework.eventhandling.saga.repository.jpa.JpaSagaStore;
import org.axonframework.eventhandling.tokenstore.TokenStore;
import org.axonframework.eventhandling.tokenstore.jpa.JpaTokenStore;
import org.axonframework.eventsourcing.eventstore.EventStorageEngine;
import org.axonframework.eventsourcing.eventstore.jpa.JpaEventStorageEngine;
import org.axonframework.serialization.Serializer;
import org.axonframework.serialization.upcasting.event.EventUpcaster;
import org.axonframework.spring.config.AxonConfiguration;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.persistence.EntityManagerFactory;

@ConditionalOnBean(EntityManagerFactory.class)
@RegisterDefaultEntities(packages = {"org.axonframework.eventsourcing.eventstore.jpa",
        "org.axonframework.eventhandling.tokenstore",
        "org.axonframework.eventhandling.saga.repository.jpa"})
@Configuration
@AutoConfigureAfter(JdbcAutoConfiguration.class)
public class JpaAutoConfiguration {

    @ConditionalOnMissingBean
    @Bean
    public EventStorageEngine eventStorageEngine(Serializer serializer,
                                                 PersistenceExceptionResolver persistenceExceptionResolver,
                                                 AxonConfiguration configuration,
                                                 EntityManagerProvider entityManagerProvider,
                                                 TransactionManager transactionManager) {
        return new JpaEventStorageEngine(serializer, configuration.getComponent(EventUpcaster.class),
                                         persistenceExceptionResolver, configuration.eventSerializer(), null,
                                         entityManagerProvider, transactionManager, null, null, true);
    }

    @ConditionalOnMissingBean
    @Bean
    public EventStorageEngine eventStorageEngine(Serializer serializer,
                                                 PersistenceExceptionResolver persistenceExceptionResolver,
                                                 @Qualifier("eventSerializer") Serializer eventSerializer,
                                                 AxonConfiguration configuration,
                                                 EntityManagerProvider entityManagerProvider,
                                                 TransactionManager transactionManager) {
        return new JpaEventStorageEngine(serializer, configuration.getComponent(EventUpcaster.class),
                                         persistenceExceptionResolver, eventSerializer, null, entityManagerProvider,
                                         transactionManager, null, null, true);
    }

    @ConditionalOnMissingBean
    @Bean
    public EntityManagerProvider entityManagerProvider() {
        return new ContainerManagedEntityManagerProvider();
    }

    @ConditionalOnMissingBean
    @Bean
    public TokenStore tokenStore(Serializer serializer, EntityManagerProvider entityManagerProvider) {
        return new JpaTokenStore(entityManagerProvider, serializer);
    }

    @ConditionalOnMissingBean(SagaStore.class)
    @Bean
    public JpaSagaStore sagaStore(Serializer serializer, EntityManagerProvider entityManagerProvider) {
        return new JpaSagaStore(serializer, entityManagerProvider);
    }
}