spring JndiCallback 源码
spring JndiCallback 代码
文件路径：/spring-context/src/main/java/org/springframework/jndi/JndiCallback.java
/*
* Copyright 2002-2021 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.jndi;
import javax.naming.Context;
import javax.naming.NamingException;
import org.springframework.lang.Nullable;
/**
* Callback interface to be implemented by classes that need to perform an
* operation (such as a lookup) in a JNDI context. This callback approach
* is valuable in simplifying error handling, which is performed by the
* JndiTemplate class. This is a similar to JdbcTemplate's approach.
*
* <p>Note that there is hardly any need to implement this callback
* interface, as JndiTemplate provides all usual JNDI operations via
* convenience methods.
*
* @author Rod Johnson
* @param <T> the resulting object type
* @see JndiTemplate
* @see org.springframework.jdbc.core.JdbcTemplate
*/
@FunctionalInterface
public interface JndiCallback<T> {
/**
* Do something with the given JNDI context.
* <p>Implementations don't need to worry about error handling
* or cleanup, as the JndiTemplate class will handle this.
* @param ctx the current JNDI context
* @return a result object, or {@code null}
* @throws NamingException if thrown by JNDI methods
*/
@Nullable
T doInContext(Context ctx) throws NamingException;
}
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