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## org.apache.catalina.realm
Class UserDatabaseRealm

    java.lang.Object
      org.apache.catalina.util.LifecycleBase
          org.apache.catalina.util.LifecycleMBeanBase
              org.apache.catalina.realm.RealmBase
                  org.apache.catalina.realm.UserDatabaseRealm

All Implemented Interfaces:
  MBeanRegistration, Lifecycle, Realm

    public class UserDatabaseRealm

extends RealmBase

Implementation of `Realm` that is based on an implementation of `UserDatabase` made available through the global JNDI resources configured for this instance of Catalina. Set the `resourceName` parameter to the global JNDI resources name for the configured instance of `UserDatabase` that we should consult.

Since:
  4.1
Version:
  $Id: UserDatabaseRealm.java 1079405 2011-03-08 15:58:53Z markt $
Author:
  Craig R. McClanahan

Nested Class Summary

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

Field Summary
`protected UserDatabase` | `database` The `UserDatabase` we will use to authenticate users and identify associated roles.
`protected static String` | `info` Descriptive information about this Realm implementation.
`protected static String` | `name` Descriptive information about this Realm implementation.
`protected String` | `resourceName` The global JNDI name of the `UserDatabase` resource we will be utilizing.

Fields inherited from class org.apache.catalina.realm.RealmBase
`allRolesMode, container, containerLog, digest, digestEncoding, md, md5Encoder, md5Helper, realmPath, sm, stripRealmForGss, support, validate, x509UsernameRetriever, x509UsernameRetrieverClassName`

Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase
`mserver`

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
`UserDatabaseRealm()`

Method Summary
`String` | `getInfo()` Return descriptive information about this Realm implementation and the corresponding version number, in the format `<description>/<version>`.
`protected String` | `getName()` Return a short name for this Realm implementation.
`protected String` | `getPassword(String username)` Return the password associated with the given principal's user name.
`protected Principal` | `getPrincipal(String username)` Return the Principal associated with the given user name.
`String` | `getResourceName()` Return the global JNDI name of the `UserDatabase` resource we will be using.
`boolean` | `hasRole(Wrapper wrapper, Principal principal, String role)` Return `true` if the specified Principal has the specified security role, within the context of this Realm; otherwise return `false`.
`void` | `setResourceName(String resourceName)` Set the global JNDI name of the `UserDatabase` resource we will be using.
`protected void` | `startInternal()` Prepare for the beginning of active use of the public methods of this component and implement the requirements of `LifecycleBase.startInternal()`.
`protected void` | `stopInternal()` Gracefully terminate the active use of the public methods of this component and implement the requirements of `LifecycleBase.stopInternal()`.

Methods inherited from class org.apache.catalina.realm.RealmBase
`addPropertyChangeListener, authenticate, authenticate, authenticate, authenticate, backgroundProcess, digest, Digest, findSecurityConstraints, getAllRolesMode, getContainer, getDigest, getDigest, getDigestCharset, getDigestEncoding, getDomainInternal, getObjectNameKeyProperties, getPrincipal, getPrincipal, getRealmPath, getRealmSuffix, getServer, getValidate, getX509UsernameRetrieverClassName, hasMessageDigest, hasResourcePermission, hasUserDataPermission, initInternal, isStripRealmForGss, main, removePropertyChangeListener, setAllRolesMode, setContainer, setDigest, setDigestEncoding, setRealmPath, setStripRealmForGss, setValidate, setX509UsernameRetrieverClassName, toString`

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase
`destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister`

Methods inherited from class org.apache.catalina.util.LifecycleBase
`addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### database

    protected UserDatabase database

  The `UserDatabase` we will use to authenticate users and identify associated roles.

### info

    protected static final String info

  Descriptive information about this Realm implementation.

  See Also:
    Constant Field Values

### name

    protected static final String name

  Descriptive information about this Realm implementation.

  See Also:
    Constant Field Values

### resourceName

    protected String resourceName

  The global JNDI name of the `UserDatabase` resource we will be utilizing.

Constructor Detail

### UserDatabaseRealm

    public UserDatabaseRealm()

Method Detail

### getInfo

    public 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`

### getResourceName

    public String getResourceName()

  Return the global JNDI name of the `UserDatabase` resource we will be using.

### setResourceName

    public void setResourceName(String resourceName)

  Set the global JNDI name of the `UserDatabase` resource we will be using.

  Parameters:
    `resourceName` - The new global JNDI name

### hasRole

    public boolean hasRole(Wrapper wrapper,
                           Principal principal,
                           String role)

  Return `true` if the specified Principal has the specified security role, within the context of this Realm; otherwise return `false`. This implementation returns `true` if the `User` has the role, or if any `Group` that the `User` is a member of has the role.

  Specified by:
    `hasRole` in interface `Realm`
  Overrides:
    `hasRole` in class `RealmBase`
  Parameters:
    `principal` - Principal for whom the role is to be checked
    `role` - Security role to be checked
    `wrapper` - wrapper context for evaluating role

### getName

    protected String getName()

  Return a short name for this Realm implementation.

  Specified by:
    `getName` in class `RealmBase`

### getPassword

    protected String getPassword(String username)

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

  Specified by:
    `getPassword` in class `RealmBase`

### getPrincipal

    protected Principal getPrincipal(String username)

  Return the Principal associated with the given user name.

  Specified by:
    `getPrincipal` in class `RealmBase`

### startInternal

    protected void startInternal()
                          throws LifecycleException

  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

### stopInternal

    protected void stopInternal()
                         throws LifecycleException

  Gracefully terminate the active use of the public methods of this component and implement the requirements of `LifecycleBase.stopInternal()`.

  Overrides:
    `stopInternal` in class `RealmBase`
  Throws:
    `LifecycleException` - if this component detects a fatal error that needs to be reported

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