JndiCallback (Apache Shiro :: Core 1.7.1 API)

```
public interface JndiCallback
```
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.
Note that there is hardly any need to implement this callback interface, as JndiTemplate provides all usual JNDI operations via convenience methods.
Note that this interface is an exact copy of the Spring Framework's identically named interface from their 2.5.4 distribution - we didn't want to re-invent the wheel, but not require a full dependency on the Spring framework, nor does Spring make available only its JNDI classes in a small jar, or we would have used that. Since Shiro is also Apache 2.0 licensed, all regular licenses and conditions and authors have remained in tact.

See Also:

JndiTemplate

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Object doInContext(Context ctx)
  Do something with the given JNDI context.

- Method Detail
  - doInContext
```
Object doInContext(Context ctx)
            throws NamingException
```
    Do something with the given JNDI context. Implementations don't need to worry about error handling or cleanup, as the JndiTemplate class will handle this.
    
    Parameters:
    
    ctx - the current JNDI context
    
    Returns:
    
    a result object, or null
    
    Throws:
    
    NamingException - if thrown by JNDI methods