org.wamblee.glassfish.auth.cache.impl

Class SimpleExpiryCache

java.lang.Object

org.wamblee.glassfish.auth.cache.impl.SimpleExpiryCache

All Implemented Interfaces:

AuthenticationCache

public class SimpleExpiryCache
extends Object
implements AuthenticationCache

Simple cache that has entries that expire after a certain amount of time. Also, the cache has a JMX interface SimpleExpiryCacheManagementMBean by which the entries for one or all users can be expired. The cache does not do an automatic cleanup of expired items although it is possible to trigger cleanup through JMX.

The cache exposes an MBean for remote management and for managing it from an application. This access is unsecured so anyone can in principle clean the cache. The main intention of the JMX MBean is to use it for invalidating the cache for a specific user in case his authentication information has changed. The MBean is exposed at the domain specified by JMX_DOMAIN with a property specified by JMX_REALM_PROPERTY with the value of the realm.

To clear a specific user, proceed as follows:

 ObjectName objectName = new ObjectName(
     "org.wamblee.glassfish.auth.FlexibleJdbcRealm", "realm", REALM_NAME);
 ManagementFactory.getPlatformMBeanServer().invoke(objectName, "clearUser",
     new Object[] { "username" }, new String[] { String.class.getName() });
 

Author:

Erik Brakkee

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	SimpleExpiryCache.Clock
static class	SimpleExpiryCache.SystemClock
static class	SimpleExpiryCache.UserEntry Class representing cached information about a user.

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_EXPIRY_TIME_SECONDS Default expiry time in seconds.
static String	JMX_DOMAIN
static String	PROP_EXPIRY_TIME_SECONDS Name of the property that defines the timeout in seconds for caching.
static String	PROP_REALM_NAME

Constructor Summary

Constructors

Constructor and Description
SimpleExpiryCache(Properties aProperties) Constructs the cache.
SimpleExpiryCache(Properties aProperties, SimpleExpiryCache.Clock aClock) Constructor for unit test.

Method Summary

Modifier and Type	Method and Description
protected void	clearExpired()
SimpleExpiryCache.UserEntry	evict(String aUsername)
int	getExpiryTimeSeconds()
List<String>	getGroups(String aUsername) Gets the groups a user belongs to from the cache.
String	getPassword(String aUsername) Gets the cached password for a given user.
String	getSeed(String aUsername) Gets a cached seed for a given username based on the configured sql seed query.
void	setGroups(String aUsername, List<String> aGroups) Sets the groups for a given user.
void	setPassword(String aUserName, String aPassword) Sets the cached password for a user.
void	setSeed(String aUsername, String aSeed) Sets the seed.
int	size()
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

PROP_EXPIRY_TIME_SECONDS

public static final String PROP_EXPIRY_TIME_SECONDS

Name of the property that defines the timeout in seconds for caching. In case the value is < 0, then entries in the cache will never expire.

See Also:

Constant Field Values

JMX_DOMAIN

public static final String JMX_DOMAIN

See Also:

Constant Field Values

PROP_REALM_NAME

public static final String PROP_REALM_NAME

See Also:

Constant Field Values

DEFAULT_EXPIRY_TIME_SECONDS

public static final long DEFAULT_EXPIRY_TIME_SECONDS

Default expiry time in seconds.

See Also:

Constant Field Values

Constructor Detail

SimpleExpiryCache

public SimpleExpiryCache(Properties aProperties)

Constructs the cache.

Parameters:

aProperties - Properties to configure the cache with.

SimpleExpiryCache

public SimpleExpiryCache(Properties aProperties,
                         SimpleExpiryCache.Clock aClock)

Constructor for unit test.

Parameters:

aProperties - Properties.

aClock - Clock.

Method Detail

clearExpired

protected void clearExpired()

getExpiryTimeSeconds

public int getExpiryTimeSeconds()

size

public int size()

toString

public String toString()

Overrides:

toString in class Object

getGroups

public List<String> getGroups(String aUsername)

Description copied from interface: AuthenticationCache

Gets the groups a user belongs to from the cache.

Specified by:

getGroups in interface AuthenticationCache

Parameters:

aUsername - User.

Returns:

Groups. Returns a (possibly) empty list of cached groups or null of no cached groups are found.

getPassword

public String getPassword(String aUsername)

Description copied from interface: AuthenticationCache

Gets the cached password for a given user.

Specified by:

getPassword in interface AuthenticationCache

Parameters:

aUsername - Username.

Returns:

Password or null if no cached value is available.

getSeed

public String getSeed(String aUsername)

Description copied from interface: AuthenticationCache

Gets a cached seed for a given username based on the configured sql seed query.

Specified by:

getSeed in interface AuthenticationCache

Parameters:

aUsername - Username.

Returns:

The seed found or the empty string if no seeds or multiple seeds were found. Returns null in case no cached seed is available.

setGroups

public void setGroups(String aUsername,
                      List<String> aGroups)

Description copied from interface: AuthenticationCache

Sets the groups for a given user.

Specified by:

setGroups in interface AuthenticationCache

Parameters:

aUsername - User name.

aGroups - Groups (must be non-null).

setPassword

public void setPassword(String aUserName,
                        String aPassword)

Description copied from interface: AuthenticationCache

Sets the cached password for a user.

Specified by:

setPassword in interface AuthenticationCache

Parameters:

aUserName - Username.

aPassword - Password.

setSeed

public void setSeed(String aUsername,
                    String aSeed)

Description copied from interface: AuthenticationCache

Sets the seed.

Specified by:

setSeed in interface AuthenticationCache

Parameters:

aUsername - Username.

aSeed - Seed (may not be null).

evict

public SimpleExpiryCache.UserEntry evict(String aUsername)