ActionContext (Struts 2 Core 2.5 API)

java.lang.Object
- com.opensymphony.xwork2.ActionContext

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

ServletActionContext
```
public class ActionContext
extends Object
implements Serializable
```
The ActionContext is the context in which an Action is executed. Each context is basically a container of objects an action needs for execution like the session, parameters, locale, etc.

The ActionContext is thread local which means that values stored in the ActionContext are unique per thread. See the ThreadLocal class for more information. The benefit of this is you don't need to worry about a user specific action context, you just get it:
ActionContext context = ActionContext.getContext();
Finally, because of the thread local usage you don't need to worry about making your actions thread safe.

Author:

Patrick Lightbody, Bill Lynch (docs)

See Also:
Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ACTION_INVOCATION` Constant for the action's `invocation` context.
`static String`	`ACTION_NAME` Constant for the name of the action being executed.
`static String`	`APPLICATION` Constant for the action's application context.
`static String`	`CONTAINER` Constant for the container
`static String`	`CONVERSION_ERRORS` Constant for the map of type conversion errors.
`static String`	`LOCALE` Constant for the action's locale.
`static String`	`PARAMETERS` Constant for the action's parameters.
`static String`	`SESSION` Constant for the action's session.
`static String`	`TYPE_CONVERTER` Constant for the action's type converter.
`static String`	`VALUE_STACK` Constant for the `OGNL value stack`.

Constructor Summary

Constructors
Constructor and Description

ActionContext(Map<String,Object> context)
Creates a new ActionContext initialized with another context.

Constructors
Constructor and Description
`ActionContext(Map<String,Object> context)` Creates a new ActionContext initialized with another context.

Method Summary

Methods
Modifier and Type	Method and Description
`Object`	`get(String key)` Returns a value that is stored in the current ActionContext by doing a lookup using the value's key.
`ActionInvocation`	`getActionInvocation()` Gets the action invocation (the execution state).
`Map<String,Object>`	`getApplication()` Returns a Map of the ServletContext when in a servlet environment or a generic application level Map otherwise.
`Container`	`getContainer()` Sets the container for this request
`static ActionContext`	`getContext()` Returns the ActionContext specific to the current thread.
`Map<String,Object>`	`getContextMap()` Gets the context map.
`Map<String,Object>`	`getConversionErrors()` Gets the map of conversion errors which occurred when executing the action.
`<T> T`	`getInstance(Class<T> type)`
`Locale`	`getLocale()` Gets the Locale of the current action.
`String`	`getName()` Gets the name of the current Action.
`Map<String,Object>`	`getParameters()` Returns a Map of the HttpServletRequest parameters when in a servlet environment or a generic Map of parameters otherwise.
`Map<String,Object>`	`getSession()` Gets the Map of HttpSession values when in a servlet environment or a generic session map otherwise.
`ValueStack`	`getValueStack()` Gets the OGNL value stack.
`void`	`put(String key, Object value)` Stores a value in the current ActionContext.
`void`	`setActionInvocation(ActionInvocation actionInvocation)` Sets the action invocation (the execution state).
`void`	`setApplication(Map<String,Object> application)` Sets the action's application context.
`void`	`setContainer(Container cont)` Gets the container for this request
`static void`	`setContext(ActionContext context)` Sets the action context for the current thread.
`void`	`setContextMap(Map<String,Object> contextMap)` Sets the action's context map.
`void`	`setConversionErrors(Map<String,Object> conversionErrors)` Sets conversion errors which occurred when executing the action.
`void`	`setLocale(Locale locale)` Sets the Locale for the current action.
`void`	`setName(String name)` Sets the name of the current Action in the ActionContext.
`void`	`setParameters(Map<String,Object> parameters)` Sets the action parameters.
`void`	`setSession(Map<String,Object> session)` Sets a map of action session values.
`void`	`setValueStack(ValueStack stack)` Sets the OGNL value stack.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - ACTION_NAME
```
public static final String ACTION_NAME
```
    Constant for the name of the action being executed.
    
    See Also:
    Constant Field Values
  - VALUE_STACK
```
public static final String VALUE_STACK
```
    Constant for the OGNL value stack.
    
    See Also:
    Constant Field Values
  - SESSION
```
public static final String SESSION
```
    Constant for the action's session.
    
    See Also:
    Constant Field Values
  - APPLICATION
```
public static final String APPLICATION
```
    Constant for the action's application context.
    
    See Also:
    Constant Field Values
  - PARAMETERS
```
public static final String PARAMETERS
```
    Constant for the action's parameters.
    
    See Also:
    Constant Field Values
  - LOCALE
```
public static final String LOCALE
```
    Constant for the action's locale.
    
    See Also:
    Constant Field Values
  - TYPE_CONVERTER
```
public static final String TYPE_CONVERTER
```
    Constant for the action's type converter.
    
    See Also:
    Constant Field Values
  - ACTION_INVOCATION
```
public static final String ACTION_INVOCATION
```
    Constant for the action's invocation context.
    
    See Also:
    Constant Field Values
  - CONVERSION_ERRORS
```
public static final String CONVERSION_ERRORS
```
    Constant for the map of type conversion errors.
    
    See Also:
    Constant Field Values
  - CONTAINER
```
public static final String CONTAINER
```
    Constant for the container
    
    See Also:
    Constant Field Values
- Constructor Detail
  - ActionContext
```
public ActionContext(Map<String,Object> context)
```
    Creates a new ActionContext initialized with another context.
    
    Parameters:
    context - a context map.
- Method Detail
  - setActionInvocation
```
public void setActionInvocation(ActionInvocation actionInvocation)
```
    Sets the action invocation (the execution state).
    
    Parameters:
    actionInvocation - the action execution state.
  - getActionInvocation
```
public ActionInvocation getActionInvocation()
```
    Gets the action invocation (the execution state).
    
    Returns:
    the action invocation (the execution state).
  - setApplication
```
public void setApplication(Map<String,Object> application)
```
    Sets the action's application context.
    
    Parameters:
    application - the action's application context.
  - getApplication
```
public Map<String,Object> getApplication()
```
    Returns a Map of the ServletContext when in a servlet environment or a generic application level Map otherwise.
    
    Returns:
    a Map of ServletContext or generic application level Map
  - setContext
```
public static void setContext(ActionContext context)
```
    Sets the action context for the current thread.
    
    Parameters:
    context - the action context.
  - getContext
```
public static ActionContext getContext()
```
    Returns the ActionContext specific to the current thread.
    
    Returns:
    the ActionContext for the current thread, is never null.
  - setContextMap
```
public void setContextMap(Map<String,Object> contextMap)
```
    Sets the action's context map.
    
    Parameters:
    contextMap - the context map.
  - getContextMap
```
public Map<String,Object> getContextMap()
```
    Gets the context map.
    
    Returns:
    the context map.
  - setConversionErrors
```
public void setConversionErrors(Map<String,Object> conversionErrors)
```
    Sets conversion errors which occurred when executing the action.
    
    Parameters:
    conversionErrors - a Map of errors which occurred when executing the action.
  - getConversionErrors
```
public Map<String,Object> getConversionErrors()
```
    Gets the map of conversion errors which occurred when executing the action.
    
    Returns:
    the map of conversion errors which occurred when executing the action or an empty map if there were no errors.
  - setLocale
```
public void setLocale(Locale locale)
```
    Sets the Locale for the current action.
    
    Parameters:
    locale - the Locale for the current action.
  - getLocale
```
public Locale getLocale()
```
    Gets the Locale of the current action. If no locale was ever specified the platform's default locale is used.
    
    Returns:
    the Locale of the current action.
  - setName
```
public void setName(String name)
```
    Sets the name of the current Action in the ActionContext.
    
    Parameters:
    name - the name of the current action.
  - getName
```
public String getName()
```
    Gets the name of the current Action.
    
    Returns:
    the name of the current action.
  - setParameters
```
public void setParameters(Map<String,Object> parameters)
```
    Sets the action parameters.
    
    Parameters:
    parameters - the parameters for the current action.
  - getParameters
```
public Map<String,Object> getParameters()
```
    Returns a Map of the HttpServletRequest parameters when in a servlet environment or a generic Map of parameters otherwise.
    
    Returns:
    a Map of HttpServletRequest parameters or a multipart map when in a servlet environment, or a generic Map of parameters otherwise.
  - setSession
```
public void setSession(Map<String,Object> session)
```
    Sets a map of action session values.
    
    Parameters:
    session - the session values.
  - getSession
```
public Map<String,Object> getSession()
```
    Gets the Map of HttpSession values when in a servlet environment or a generic session map otherwise.
    
    Returns:
    the Map of HttpSession values when in a servlet environment or a generic session map otherwise.
  - setValueStack
```
public void setValueStack(ValueStack stack)
```
    Sets the OGNL value stack.
    
    Parameters:
    stack - the OGNL value stack.
  - getValueStack
```
public ValueStack getValueStack()
```
    Gets the OGNL value stack.
    
    Returns:
    the OGNL value stack.
  - setContainer
```
public void setContainer(Container cont)
```
    Gets the container for this request
    
    Parameters:
    cont - The container
  - getContainer
```
public Container getContainer()
```
    Sets the container for this request
    
    Returns:
    The container
  - getInstance
```
public <T> T getInstance(Class<T> type)
```
  - get
```
public Object get(String key)
```
    Returns a value that is stored in the current ActionContext by doing a lookup using the value's key.
    
    Parameters:
    key - the key used to find the value.
    
    Returns:
    the value that was found using the key or null if the key was not found.
  - put
```
public void put(String key,
       Object value)
```
    Stores a value in the current ActionContext. The value can be looked up using the key.
    
    Parameters:
    key - the key of the value.
    value - the value to be stored.

Class ActionContext

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ACTION_NAME

VALUE_STACK

SESSION

APPLICATION

PARAMETERS

LOCALE

TYPE_CONVERTER

ACTION_INVOCATION

CONVERSION_ERRORS

CONTAINER

Constructor Detail

ActionContext

Method Detail

setActionInvocation

getActionInvocation

setApplication

getApplication

setContext

getContext

setContextMap

getContextMap

setConversionErrors

getConversionErrors

setLocale

getLocale

setName

getName

setParameters

getParameters

setSession

getSession

setValueStack

getValueStack

setContainer

getContainer

getInstance

get

put