Class Registry

java/org/apache/tomcat/util/modeler/Registry.java:49–764

Registry for modeler MBeans. This is the main entry point into modeler. It provides methods to create and manipulate model mbeans and simplify their use. This class is itself a mbean.

 * model mbeans and simplify their use. This class is itself a mbean.
 */
public class Registry implements RegistryMBean, MBeanRegistration {

    /**
     * The Log instance to which we will write our log messages.
     */
    private static final Log log = LogFactory.getLog(Registry.class);
    private static final StringManager sm = StringManager.getManager(Registry.class);

    // Support for the factory methods

    /**
     * The registry instance created by our factory method the first time it is called.
     */
    private static Registry registry = null;

    // Per registry fields

    /**
     * The <code>MBeanServer</code> instance that we will use to register management beans.
     */
    private volatile MBeanServer server = null;
    private final Object serverLock = new Object();

    /**
     * The set of ManagedBean instances for the beans this registry knows about, keyed by name.
     */
    private Map<String,ManagedBean> descriptors = new HashMap<>();

    /**
     * List of managed beans, keyed by class name
     */
    private Map<String,ManagedBean> descriptorsByClass = new HashMap<>();

    // map to avoid duplicated searching or loading descriptors
    private Map<String,URL> searchedPaths = new HashMap<>();

    private Object guard;

    // Id - small ints to use array access. No reset on stop()
    // Used for notifications
    private final Hashtable<String,Hashtable<String,Integer>> idDomains = new Hashtable<>();
    private final Hashtable<String,int[]> ids = new Hashtable<>();


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

    /**
     * Protected constructor for Registry. Use {@link #getRegistry(Object)} to obtain an instance.
     */
    protected Registry() {
        super();
    }


    // -------------------- Static methods --------------------
    // Factories

    /**