JndiCallback


1   /*
2    * Copyright 2002-2005 the original author or authors.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.springframework.jndi;
18  
19  import javax.naming.Context  ;
20  import javax.naming.NamingException  ;
21  
22  /**
23   * Callback interface to be implemented by classes that need to perform an
24   * operation (such as a lookup) in a JNDI context. This callback approach
25   * is valuable in simplifying error handling, which is performed by the
26   * JndiTemplate class. This is a similar to JdbcTemplate's approach.
27   *
28   * <p>Note that there is hardly any need to implement this callback
29   * interface, as JndiTemplate provides all usual JNDI operations via
30   * convenience methods.
31   *
32   * @see JndiTemplate
33   * @see org.springframework.jdbc.core.JdbcTemplate
34   * @author Rod Johnson
35   */
36  public interface JndiCallback {
37      
38      /**
39       * Do something with the given JNDI context.
40       * Implementations don't need to worry about error handling
41       * or cleanup, as the JndiTemplate class will handle this.
42       * @param ctx the current JNDI context
43       * @throws NamingException if thrown by JNDI methods
44       * @return a result object, or <code>null</code>
45       */
46    Object   doInContext(Context   ctx) throws NamingException  ;
47  
48  }
49  
50
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