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## org.apache.catalina.realm
Class JDBCRealm

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

All Implemented Interfaces:
  MBeanRegistration, Lifecycle, Realm

    public class JDBCRealm

extends RealmBase

Implementation of Realm that works with any JDBC supported database. See the JDBCRealm.howto for more details on how to set up the database and for configuration options.

For a Realm implementation that supports connection pooling and doesn't require synchronisation of `authenticate()`, `getPassword()`, `roles()` and `getPrincipal()` or the ugly connection logic use the `DataSourceRealm`.

Version:
  $Id: JDBCRealm.java 1348499 2012-06-09 20:37:14Z markt $
Author:
  Craig R. McClanahan, Carson McDonald, Ignacio Ortega

Nested Class Summary

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

Field Summary
`protected String` | `connectionName` The connection username to use when trying to connect to the database.
`protected String` | `connectionPassword` The connection URL to use when trying to connect to the database.
`protected String` | `connectionURL` The connection URL to use when trying to connect to the database.
`protected Connection` | `dbConnection` The connection to the database.
`protected Driver` | `driver` Instance of the JDBC Driver class we use as a connection factory.
`protected String` | `driverName` The JDBC driver to use.
`protected static String` | `info` Descriptive information about this Realm implementation.
`protected static String` | `name` Descriptive information about this Realm implementation.
`protected PreparedStatement` | `preparedCredentials` The PreparedStatement to use for authenticating users.
`protected PreparedStatement` | `preparedRoles` The PreparedStatement to use for identifying the roles for a specified user.
`protected String` | `roleNameCol` The column in the user role table that names a role
`protected String` | `userCredCol` The column in the user table that holds the user's credentials
`protected String` | `userNameCol` The column in the user table that holds the user's name
`protected String` | `userRoleTable` The table that holds the relation between user's and roles
`protected String` | `userTable` The table that holds user data.

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
`JDBCRealm()`

Method Summary
`Principal` | `authenticate(Connection dbConnection, String username, String credentials)` Return the Principal associated with the specified username and credentials, if there is one; otherwise return `null`.
`Principal` | `authenticate(String username, String credentials)` Return the Principal associated with the specified username and credentials, if there is one; otherwise return `null`.
`protected void` | `close(Connection dbConnection)` Close the specified database connection.
`protected PreparedStatement` | `credentials(Connection dbConnection, String username)` Return a PreparedStatement configured to perform the SELECT required to retrieve user credentials for the specified username.
`String` | `getConnectionName()` Return the username to use to connect to the database.
`String` | `getConnectionPassword()` Return the password to use to connect to the database.
`String` | `getConnectionURL()` Return the URL to use to connect to the database.
`String` | `getDriverName()` Return the JDBC driver that will be used.
`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` | `getRoleNameCol()` Return the column in the user role table that names a role.
`protected ArrayList<String>` | `getRoles(String username)` Return the roles associated with the gven user name.
`String` | `getUserCredCol()` Return the column in the user table that holds the user's credentials.
`String` | `getUserNameCol()` Return the column in the user table that holds the user's name.
`String` | `getUserRoleTable()` Return the table that holds the relation between user's and roles.
`String` | `getUserTable()` Return the table that holds user data..
`protected Connection` | `open()` Open (if necessary) and return a database connection for use by this Realm.
`protected void` | `release(Connection dbConnection)` Release our use of this connection so that it can be recycled.
`protected PreparedStatement` | `roles(Connection dbConnection, String username)` Return a PreparedStatement configured to perform the SELECT required to retrieve user roles for the specified username.
`void` | `setConnectionName(String connectionName)` Set the username to use to connect to the database.
`void` | `setConnectionPassword(String connectionPassword)` Set the password to use to connect to the database.
`void` | `setConnectionURL(String connectionURL)` Set the URL to use to connect to the database.
`void` | `setDriverName(String driverName)` Set the JDBC driver that will be used.
`void` | `setRoleNameCol(String roleNameCol)` Set the column in the user role table that names a role.
`void` | `setUserCredCol(String userCredCol)` Set the column in the user table that holds the user's credentials.
`void` | `setUserNameCol(String userNameCol)` Set the column in the user table that holds the user's name.
`void` | `setUserRoleTable(String userRoleTable)` Set the table that holds the relation between user's and roles.
`void` | `setUserTable(String userTable)` Set the table that holds user data.
`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, backgroundProcess, digest, Digest, findSecurityConstraints, getAllRolesMode, getContainer, getDigest, getDigest, getDigestCharset, getDigestEncoding, getDomainInternal, getObjectNameKeyProperties, getPrincipal, getPrincipal, getRealmPath, getRealmSuffix, getServer, getValidate, getX509UsernameRetrieverClassName, hasMessageDigest, hasResourcePermission, hasRole, 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

### connectionName

    protected String connectionName

  The connection username to use when trying to connect to the database.

### connectionPassword

    protected String connectionPassword

  The connection URL to use when trying to connect to the database.

### connectionURL

    protected String connectionURL

  The connection URL to use when trying to connect to the database.

### dbConnection

    protected Connection dbConnection

  The connection to the database.

### driver

    protected Driver driver

  Instance of the JDBC Driver class we use as a connection factory.

### driverName

    protected String driverName

  The JDBC driver to use.

### 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

### preparedCredentials

    protected PreparedStatement preparedCredentials

  The PreparedStatement to use for authenticating users.

### preparedRoles

    protected PreparedStatement preparedRoles

  The PreparedStatement to use for identifying the roles for a specified user.

### roleNameCol

    protected String roleNameCol

  The column in the user role table that names a role

### userCredCol

    protected String userCredCol

  The column in the user table that holds the user's credentials

### userNameCol

    protected String userNameCol

  The column in the user table that holds the user's name

### userRoleTable

    protected String userRoleTable

  The table that holds the relation between user's and roles

### userTable

    protected String userTable

  The table that holds user data.

Constructor Detail

### JDBCRealm

    public JDBCRealm()

Method Detail

### getConnectionName

    public String getConnectionName()

  Return the username to use to connect to the database.

### setConnectionName

    public void setConnectionName(String connectionName)

  Set the username to use to connect to the database.

  Parameters:
    `connectionName` - Username

### getConnectionPassword

    public String getConnectionPassword()

  Return the password to use to connect to the database.

### setConnectionPassword

    public void setConnectionPassword(String connectionPassword)

  Set the password to use to connect to the database.

  Parameters:
    `connectionPassword` - User password

### getConnectionURL

    public String getConnectionURL()

  Return the URL to use to connect to the database.

### setConnectionURL

    public void setConnectionURL(String connectionURL)

  Set the URL to use to connect to the database.

  Parameters:
    `connectionURL` - The new connection URL

### getDriverName

    public String getDriverName()

  Return the JDBC driver that will be used.

### setDriverName

    public void setDriverName(String driverName)

  Set the JDBC driver that will be used.

  Parameters:
    `driverName` - The driver name

### getRoleNameCol

    public String getRoleNameCol()

  Return the column in the user role table that names a role.

### setRoleNameCol

    public void setRoleNameCol(String roleNameCol)

  Set the column in the user role table that names a role.

  Parameters:
    `roleNameCol` - The column name

### getUserCredCol

    public String getUserCredCol()

  Return the column in the user table that holds the user's credentials.

### setUserCredCol

    public void setUserCredCol(String userCredCol)

  Set the column in the user table that holds the user's credentials.

  Parameters:
    `userCredCol` - The column name

### getUserNameCol

    public String getUserNameCol()

  Return the column in the user table that holds the user's name.

### setUserNameCol

    public void setUserNameCol(String userNameCol)

  Set the column in the user table that holds the user's name.

  Parameters:
    `userNameCol` - The column name

### getUserRoleTable

    public String getUserRoleTable()

  Return the table that holds the relation between user's and roles.

### setUserRoleTable

    public void setUserRoleTable(String userRoleTable)

  Set the table that holds the relation between user's and roles.

  Parameters:
    `userRoleTable` - The table name

### getUserTable

    public String getUserTable()

  Return the table that holds user data..

### setUserTable

    public void setUserTable(String userTable)

  Set the table that holds user data.

  Parameters:
    `userTable` - The table name

### 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`

### authenticate

    public Principal authenticate(String username,
                                  String credentials)

  Return the Principal associated with the specified username and credentials, if there is one; otherwise return `null`. If there are any errors with the JDBC connection, executing the query or anything we return null (don't authenticate). This event is also logged, and the connection will be closed so that a subsequent request will automatically re-open it.

  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

### authenticate

    public Principal authenticate(Connection dbConnection,
                                  String username,
                                  String credentials)

  Return the Principal associated with the specified username and credentials, if there is one; otherwise return `null`.

  Parameters:
    `dbConnection` - The database connection to be used
    `username` - Username of the Principal to look up
    `credentials` - Password or other credentials to use in authenticating this username

### close

    protected void close(Connection dbConnection)

  Close the specified database connection.

  Parameters:
    `dbConnection` - The connection to be closed

### credentials

    protected PreparedStatement credentials(Connection dbConnection,
                                            String username)
                                     throws SQLException

  Return a PreparedStatement configured to perform the SELECT required to retrieve user credentials for the specified username.

  Parameters:
    `dbConnection` - The database connection to be used
    `username` - Username for which credentials should be retrieved
  Throws:
    `SQLException` - if a database error occurs

### 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`

### getRoles

    protected ArrayList<String> getRoles(String username)

  Return the roles associated with the gven user name.

### open

    protected Connection open()
                       throws SQLException

  Open (if necessary) and return a database connection for use by this Realm.

  Throws:
    `SQLException` - if a database error occurs

### release

    protected void release(Connection dbConnection)

  Release our use of this connection so that it can be recycled.

  Parameters:
    `dbConnection` - The connection to be released

### roles

    protected PreparedStatement roles(Connection dbConnection,
                                      String username)
                               throws SQLException

  Return a PreparedStatement configured to perform the SELECT required to retrieve user roles for the specified username.

  Parameters:
    `dbConnection` - The database connection to be used
    `username` - Username for which roles should be retrieved
  Throws:
    `SQLException` - if a database error occurs

### 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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