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Apache Tomcat 6.0.53
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org.apache.catalina.realm
Class MemoryRealm

java.lang.Object
  extended by org.apache.catalina.realm.RealmBase
      extended by org.apache.catalina.realm.MemoryRealm
All Implemented Interfaces:
javax.management.MBeanRegistration, 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
 
Field Summary
protected  java.lang.String info
          Descriptive information about this Realm implementation.
protected static java.lang.String name
          Descriptive information about this Realm implementation.
 
Fields inherited from class org.apache.catalina.realm.RealmBase
allRolesMode, container, containerLog, controller, digest, digestEncoding, domain, host, initialized, lifecycle, md, md5Encoder, md5Helper, mserver, oname, path, realmPath, started, support, type, validate, x509UsernameRetriever, x509UsernameRetrieverClassName
 
Fields inherited from interface org.apache.catalina.Lifecycle
AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, DESTROY_EVENT, INIT_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT
 
Constructor Summary
MemoryRealm()
           
 
Method Summary
 java.security.Principal authenticate(java.lang.String username, java.lang.String credentials)
          Return the Principal associated with the specified username and credentials, if there is one; otherwise return null.
protected  Digester getDigester()
          Return a configured Digester to use for processing the XML input file, creating a new one if necessary.
 java.lang.String getInfo()
          Return descriptive information about this Realm implementation and the corresponding version number, in the format <description>/<version>.
protected  java.lang.String getName()
          Return a short name for this Realm implementation.
protected  java.lang.String getPassword(java.lang.String username)
          Return the password associated with the given principal's user name.
 java.lang.String getPathname()
          Return the pathname of our XML file containing user definitions.
protected  java.security.Principal getPrincipal(java.lang.String username)
          Return the Principal associated with the given user name.
protected  java.util.Map getPrincipals()
          Returns the principals for this realm.
 void setPathname(java.lang.String pathname)
          Set the pathname of our XML file containing user definitions.
 void start()
          Prepare for active use of the public methods of this Component.
 void stop()
          Gracefully shut down active use of the public methods of this Component.
 
Methods inherited from class org.apache.catalina.realm.RealmBase
addLifecycleListener, addPropertyChangeListener, authenticate, authenticate, authenticate, backgroundProcess, destroy, digest, Digest, findLifecycleListeners, findSecurityConstraints, getAllRolesMode, getContainer, getController, getDigest, getDigest, getDigestEncoding, getDomain, getObjectName, getPrincipal, getRealmPath, getRealmSuffix, getType, getValidate, getX509UsernameRetrieverClassName, hasMessageDigest, hasResourcePermission, hasRole, hasUserDataPermission, init, main, postDeregister, postRegister, preDeregister, preRegister, removeLifecycleListener, removePropertyChangeListener, setAllRolesMode, setContainer, setController, setDigest, setDigestEncoding, setRealmPath, setValidate, setX509UsernameRetrieverClassName
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

info

protected final java.lang.String info
Descriptive information about this Realm implementation.

See Also:
Constant Field Values

name

protected static final java.lang.String name
Descriptive information about this Realm implementation.

See Also:
Constant Field Values
Constructor Detail

MemoryRealm

public MemoryRealm()
Method Detail

getInfo

public java.lang.String getInfo()
Return descriptive information about this Realm implementation and the corresponding version number, in the format <description>/<version>.

Specified by:
getInfo in interface Realm
Overrides:
getInfo in class RealmBase

getPathname

public java.lang.String getPathname()
Return the pathname of our XML file containing user definitions.

setPathname

public void setPathname(java.lang.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 java.security.Principal authenticate(java.lang.String username,
                                            java.lang.String credentials)
Return the Principal associated with the specified username and credentials, if there is one; otherwise return null.

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

getDigester

protected Digester getDigester()
Return a configured Digester to use for processing the XML input file, creating a new one if necessary.

getName

protected java.lang.String getName()
Return a short name for this Realm implementation.

Specified by:
getName in class RealmBase

getPassword

protected java.lang.String getPassword(java.lang.String username)
Return the password associated with the given principal's user name.

Specified by:
getPassword in class RealmBase

getPrincipal

protected java.security.Principal getPrincipal(java.lang.String username)
Return the Principal associated with the given user name.

Specified by:
getPrincipal in class RealmBase

getPrincipals

protected java.util.Map getPrincipals()
Returns the principals for this realm.

Returns:
The principals, keyed by user name (a String)

start

public void start()
           throws LifecycleException
Prepare for active use of the public methods of this Component.

Specified by:
start in interface Lifecycle
Overrides:
start in class RealmBase
Throws:
LifecycleException - if this component detects a fatal error that prevents it from being started

stop

public void stop()
          throws LifecycleException
Gracefully shut down active use of the public methods of this Component.

Specified by:
stop in interface Lifecycle
Overrides:
stop in class RealmBase
Throws:
LifecycleException - if this component detects a fatal error that needs to be reported
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Apache Tomcat 6.0.53
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