Retrievable (Apache Turbine 4.0-M2 API)

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```
public interface Retrievable
```
This interface specifies methods for uniquely identifying an object.

Version:

$Id: Retrievable.java 1706425 2015-10-02 14:47:51Z tv $

Author:

John D. McNally

Method Summary

Methods
Modifier and Type	Method and Description
`String`	`getQueryKey()` get an id that differentiates this object from others of its class.
`void`	`setQueryKey(String key)` set an id that differentiates this object from others of its class.

- Method Detail
  - getQueryKey
```
String getQueryKey()
```
    get an id that differentiates this object from others of its class.
    
    Returns:
    The id value
  - setQueryKey
```
void setQueryKey(String key)
                 throws Exception
```
    set an id that differentiates this object from others of its class.
    
    Parameters:
    key - The new id value
    
    Throws:
    
    Exception - A problem occurred while setting the id.

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