Action (Struts 2 Core 2.5 API)

All Known Implementing Classes:

ActionSupport, AppendIteratorFilter, DefaultActionSupport, IteratorGenerator, MergeIteratorFilter, SortIteratorFilter, SubsetIteratorFilter
```
public interface Action
```
All actions may implement this interface, which exposes the execute() method.
However, as of XWork 1.1, this is not required and is only here to assist users. You are free to create POJOs that honor the same contract defined by this interface without actually implementing the interface.

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ERROR` The action execution was a failure.
`static String`	`INPUT` The action execution require more input in order to succeed.
`static String`	`LOGIN` The action could not execute, since the user most was not logged in.
`static String`	`NONE` The action execution was successful but do not show a view.
`static String`	`SUCCESS` The action execution was successful.

Method Summary

Methods
Modifier and Type Method and Description

String execute()
Where the logic of the action is executed.

Methods
Modifier and Type	Method and Description
`String`	`execute()` Where the logic of the action is executed.

- Field Detail
  - SUCCESS
```
static final String SUCCESS
```
    The action execution was successful. Show result view to the end user.
    
    See Also:
    Constant Field Values
  - NONE
```
static final String NONE
```
    The action execution was successful but do not show a view. This is useful for actions that are handling the view in another fashion like redirect.
    
    See Also:
    Constant Field Values
  - ERROR
```
static final String ERROR
```
    The action execution was a failure. Show an error view, possibly asking the user to retry entering data.
    
    See Also:
    Constant Field Values
  - INPUT
```
static final String INPUT
```
    The action execution require more input in order to succeed. This result is typically used if a form handling action has been executed so as to provide defaults for a form. The form associated with the handler should be shown to the end user.
    
    This result is also used if the given input params are invalid, meaning the user should try providing input again.
    
    See Also:
    Constant Field Values
  - LOGIN
```
static final String LOGIN
```
    The action could not execute, since the user most was not logged in. The login view should be shown.
    
    See Also:
    Constant Field Values
- Method Detail
  - execute
```
String execute()
               throws Exception
```
    Where the logic of the action is executed.
    
    Returns:
    a string representing the logical result of the execution. See constants in this interface for a list of standard result values.
    
    Throws:
    
    Exception - thrown if a system level exception occurs. Note: Application level exceptions should be handled by returning an error value, such as Action.ERROR.

Interface Action

Field Summary

Method Summary

Field Detail

SUCCESS

NONE

ERROR

INPUT

LOGIN

Method Detail

execute