Spring Security Framework

org.springframework.security.context
Class SecurityContextHolder

java.lang.Object
  extended by org.springframework.security.context.SecurityContextHolder

public class SecurityContextHolder
extends Object

Associates a given SecurityContext with the current execution thread.

This class provides a series of static methods that delegate to an instance of SecurityContextHolderStrategy. The purpose of the class is to provide a convenient way to specify the strategy that should be used for a given JVM. This is a JVM-wide setting, since everything in this class is static to facilitate ease of use in calling code.

To specify which strategy should be used, you must provide a mode setting. A mode setting is one of the three valid MODE_ settings defined as static final fields, or a fully qualified classname to a concrete implementation of SecurityContextHolderStrategy that provides a public no-argument constructor.

There are two ways to specify the desired strategy mode String. The first is to specify it via the system property keyed on SYSTEM_PROPERTY. The second is to call setStrategyName(String) before using the class. If neither approach is used, the class will default to using MODE_THREADLOCAL, which is backwards compatible, has fewer JVM incompatibilities and is appropriate on servers (whereas MODE_GLOBAL is definitely inappropriate for server use).

Version:
$Id$
Author:
Ben Alex
See Also:
HttpSessionContextIntegrationFilter

Field Summary
static String MODE_GLOBAL
           
static String MODE_INHERITABLETHREADLOCAL
           
static String MODE_THREADLOCAL
           
static String SYSTEM_PROPERTY
           
 
Constructor Summary
SecurityContextHolder()
           
 
Method Summary
static void clearContext()
          Explicitly clears the context value from the current thread.
static SecurityContext getContext()
          Obtain the current SecurityContext.
static int getInitializeCount()
          Primarily for troubleshooting purposes, this method shows how many times the class has reinitialized its SecurityContextHolderStrategy.
static void setContext(SecurityContext context)
          Associates a new SecurityContext with the current thread of execution.
static void setStrategyName(String strategyName)
          Changes the preferred strategy.
 String toString()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

MODE_THREADLOCAL

public static final String MODE_THREADLOCAL
See Also:
Constant Field Values

MODE_INHERITABLETHREADLOCAL

public static final String MODE_INHERITABLETHREADLOCAL
See Also:
Constant Field Values

MODE_GLOBAL

public static final String MODE_GLOBAL
See Also:
Constant Field Values

SYSTEM_PROPERTY

public static final String SYSTEM_PROPERTY
See Also:
Constant Field Values
Constructor Detail

SecurityContextHolder

public SecurityContextHolder()
Method Detail

clearContext

public static void clearContext()
Explicitly clears the context value from the current thread.


getContext

public static SecurityContext getContext()
Obtain the current SecurityContext.

Returns:
the security context (never null)

getInitializeCount

public static int getInitializeCount()
Primarily for troubleshooting purposes, this method shows how many times the class has reinitialized its SecurityContextHolderStrategy.

Returns:
the count (should be one unless you've called setStrategyName(String) to switch to an alternate strategy.

setContext

public static void setContext(SecurityContext context)
Associates a new SecurityContext with the current thread of execution.

Parameters:
context - the new SecurityContext (may not be null)

setStrategyName

public static void setStrategyName(String strategyName)
Changes the preferred strategy. Do NOT call this method more than once for a given JVM, as it will reinitialize the strategy and adversely affect any existing threads using the old strategy.

Parameters:
strategyName - the fully qualified classname of the strategy that should be used.

toString

public String toString()
Overrides:
toString in class Object

Spring Security Framework

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