spring HibernateCallback 源码
spring HibernateCallback 代码
文件路径：/spring-orm/src/main/java/org/springframework/orm/hibernate5/HibernateCallback.java
/*
* Copyright 2002-2018 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.orm.hibernate5;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.springframework.lang.Nullable;
/**
* Callback interface for Hibernate code. To be used with {@link HibernateTemplate}'s
* execution methods, often as anonymous classes within a method implementation.
* A typical implementation will call {@code Session.load/find/update} to perform
* some operations on persistent objects.
*
* @author Juergen Hoeller
* @since 4.2
* @param <T> the result type
* @see HibernateTemplate
* @see HibernateTransactionManager
*/
@FunctionalInterface
public interface HibernateCallback<T> {
/**
* Gets called by {@code HibernateTemplate.execute} with an active
* Hibernate {@code Session}. Does not need to care about activating
* or closing the {@code Session}, or handling transactions.
* <p>Allows for returning a result object created within the callback,
* i.e. a domain object or a collection of domain objects.
* A thrown custom RuntimeException is treated as an application exception:
* It gets propagated to the caller of the template.
* @param session active Hibernate session
* @return a result object, or {@code null} if none
* @throws HibernateException if thrown by the Hibernate API
* @see HibernateTemplate#execute
*/
@Nullable
T doInHibernate(Session session) throws HibernateException;
}
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