Class MemoryUserDatabase

java/org/apache/catalina/users/MemoryUserDatabase.java:75–676

 * saving or loading the database) must first obtain the write lock.
 */
public class MemoryUserDatabase implements UserDatabase {

    private static final Log log = LogFactory.getLog(MemoryUserDatabase.class);
    private static final StringManager sm = StringManager.getManager(MemoryUserDatabase.class);


    // ----------------------------------------------------------- Constructors

    /**
     * Create a new instance with default values.
     */
    public MemoryUserDatabase() {
        this(null);
    }


    /**
     * Create a new instance with the specified values.
     *
     * @param id Unique global identifier of this user database
     */
    public MemoryUserDatabase(String id) {
        this.id = id;
    }

    // ----------------------------------------------------- Instance Variables

    /**
     * The set of {@link Group}s defined in this database, keyed by group name.
     */
    protected final Map<String,Group> groups = new ConcurrentHashMap<>();

    /**
     * The unique global identifier of this user database.
     */
    protected final String id;

    /**
     * The relative (to <code>catalina.base</code>) or absolute pathname to the XML file in which we will save our
     * persistent information.
     */
    protected String pathname = "conf/tomcat-users.xml";

    /**
     * The relative or absolute pathname to the file in which our old information is stored while renaming is in
     * progress.
     */
    protected String pathnameOld = pathname + ".old";

    /**
     * The relative or absolute pathname of the file in which we write our new information prior to renaming.
     */
    protected String pathnameNew = pathname + ".new";

    /**
     * A flag, indicating if the user database is read only.
     */
    protected boolean readonly = true;