spring JpaBatchConfigurer 源码
springboot JpaBatchConfigurer 代码
文件路径：/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/batch/JpaBatchConfigurer.java
/*
* Copyright 2012-2022 the original author or authors.
*
* 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
*
* https://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.springframework.boot.autoconfigure.batch;
import javax.sql.DataSource;
import jakarta.persistence.EntityManagerFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.boot.autoconfigure.batch.BatchProperties.Isolation;
import org.springframework.boot.autoconfigure.transaction.TransactionManagerCustomizers;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
/**
* A {@link BasicBatchConfigurer} tailored for JPA.
*
* @author Stephane Nicoll
* @since 2.0.0
*/
public class JpaBatchConfigurer extends BasicBatchConfigurer {
private static final Log logger = LogFactory.getLog(JpaBatchConfigurer.class);
private final EntityManagerFactory entityManagerFactory;
/**
* Create a new {@link BasicBatchConfigurer} instance.
* @param properties the batch properties
* @param dataSource the underlying data source
* @param transactionManagerCustomizers transaction manager customizers (or
* {@code null})
* @param entityManagerFactory the entity manager factory (or {@code null})
*/
protected JpaBatchConfigurer(BatchProperties properties, DataSource dataSource,
TransactionManagerCustomizers transactionManagerCustomizers, EntityManagerFactory entityManagerFactory) {
super(properties, dataSource, transactionManagerCustomizers);
this.entityManagerFactory = entityManagerFactory;
}
@Override
protected String determineIsolationLevel() {
String name = super.determineIsolationLevel();
if (name != null) {
return name;
}
else {
logger.warn("JPA does not support custom isolation levels, so locks may not be taken when launching Jobs. "
+ "To silence this warning, set 'spring.batch.jdbc.isolation-level-for-create' to 'default'.");
return Isolation.DEFAULT.toIsolationName();
}
}
@Override
protected PlatformTransactionManager createTransactionManager() {
return new JpaTransactionManager(this.entityManagerFactory);
}
}
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- 本文标签： Java Spring Spring Boot
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