org.acegisecurity.context

Class SecurityContextHolder

java.lang.Object

org.acegisecurity.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: SecurityContextHolder.java 1535 2006-06-01 14:02:56Z benalex $

Author:

Ben Alex

See Also:

HttpSessionContextIntegrationFilter

Field Summary

Fields

Modifier and Type	Field and Description
static String	MODE_GLOBAL
static String	MODE_INHERITABLETHREADLOCAL
static String	MODE_THREADLOCAL
static String	SYSTEM_PROPERTY

Constructor Summary

Constructors

Constructor and Description
SecurityContextHolder()

Method Summary

Modifier and Type	Method and Description
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