Package org.apache.catalina.realm

Class MemoryRealm

java.lang.Object

org.apache.catalina.util.LifecycleBase

org.apache.catalina.util.LifecycleMBeanBase

org.apache.catalina.realm.RealmBase

org.apache.catalina.realm.MemoryRealm

All Implemented Interfaces:

MBeanRegistration, Contained, JmxEnabled, Lifecycle, Realm

Direct Known Subclasses:

JAASMemoryLoginModule

public class MemoryRealm
extends RealmBase

Simple implementation of Realm that reads an XML file to configure the valid users, passwords, and roles. The file format (and default file location) are identical to those currently supported by Tomcat 3.X.

IMPLEMENTATION NOTE: It is assumed that the in-memory collection representing our defined users (and their roles) is initialized at application startup and never modified again. Therefore, no thread synchronization is performed around accesses to the principals collection.

Author:

Craig R. McClanahan

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.catalina.realm.RealmBase

RealmBase.AllRolesMode

Nested classes/interfaces inherited from interface org.apache.catalina.Lifecycle

Lifecycle.SingleUse

Field Summary

Fields inherited from class org.apache.catalina.realm.RealmBase

allRolesMode, container, containerLog, realmPath, sm, stripRealmForGss, support, USER_ATTRIBUTES_DELIMITER, USER_ATTRIBUTES_WILDCARD, userAttributes, userAttributesList, validate, x509UsernameRetriever, x509UsernameRetrieverClassName

Fields inherited from interface org.apache.catalina.Lifecycle

AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT

Constructor Summary

Constructors

Constructor	Description
MemoryRealm()

Method Summary

Modifier and Type	Method	Description
Principal	authenticate(String username, String credentials)	Try to authenticate using the specified username and credentials.
protected Digester	getDigester()
protected String	getPassword(String username)	Get the password for the specified user.
String	getPathname()
protected Principal	getPrincipal(String username)	Get the principal associated with the specified user.
void	setPathname(String pathname)	Set the pathname of our XML file containing user definitions.
protected void	startInternal()	Prepare for the beginning of active use of the public methods of this component and implement the requirements of LifecycleBase.startInternal().

Methods inherited from class org.apache.catalina.realm.RealmBase

addPropertyChangeListener, authenticate, authenticate, authenticate, authenticate, authenticate, backgroundProcess, findSecurityConstraints, getAllRolesMode, getContainer, getCredentialHandler, getDigest, getDomainInternal, getObjectNameKeyProperties, getPrincipal, getPrincipal, getRealmPath, getRealmSuffix, getServer, getTransportGuaranteeRedirectStatus, getUserAttributes, getValidate, getX509UsernameRetrieverClassName, hasMessageDigest, hasResourcePermission, hasRole, hasRoleInternal, hasUserDataPermission, initInternal, isStripRealmForGss, main, parseUserAttributes, removePropertyChangeListener, setAllRolesMode, setContainer, setCredentialHandler, setRealmPath, setStripRealmForGss, setTransportGuaranteeRedirectStatus, setUserAttributes, setValidate, setX509UsernameRetrieverClassName, stopInternal, toString

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister, unregister

Methods inherited from class org.apache.catalina.util.LifecycleBase

addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, getThrowOnFailure, init, removeLifecycleListener, setState, setState, setThrowOnFailure, start, stop

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.catalina.Realm

isAvailable

Constructor Details

MemoryRealm

public MemoryRealm()

Method Details

getPathname

public String getPathname()

Returns:

the pathname of our XML file containing user definitions.

setPathname

public void setPathname(String pathname)

Set the pathname of our XML file containing user definitions. If a relative pathname is specified, it is resolved against "catalina.base".

Parameters:

pathname - The new pathname

authenticate

public Principal authenticate(String username,
 String credentials)

Description copied from interface: Realm

Try to authenticate using the specified username and credentials.

Specified by:

authenticate in interface Realm

Overrides:

authenticate in class RealmBase

Parameters:

username - Username of the Principal to look up

credentials - Password or other credentials to use in authenticating this username

Returns:

the associated principal, or null if there is none

getDigester

protected Digester getDigester()

Returns:

a configured Digester to use for processing the XML input file, creating a new one if necessary.

getPassword

protected String getPassword(String username)

Description copied from class: RealmBase

Get the password for the specified user.

Specified by:

getPassword in class RealmBase

Parameters:

username - The user name

Returns:

the password associated with the given principal's user name.

getPrincipal

protected Principal getPrincipal(String username)

Description copied from class: RealmBase

Get the principal associated with the specified user.

Specified by:

getPrincipal in class RealmBase

Parameters:

username - The user name

Returns:

the Principal associated with the given user name.

startInternal

protected void startInternal()
                      throws LifecycleException

Description copied from class: RealmBase

Prepare for the beginning of active use of the public methods of this component and implement the requirements of LifecycleBase.startInternal().

Overrides:

startInternal in class RealmBase

Throws:

LifecycleException - if this component detects a fatal error that prevents this component from being used