RMIConnection (Java SE 26 & JDK 26)
Description: declaration: module: java.management.rmi, package: javax.management.remote.rmi, interface: RMIConnection
Keywords: javax.management.remote.rmi.RMIConnection interface

# Interface RMIConnection

All Superinterfaces:
  `AutoCloseable, Closeable, Remote`

All Known Implementing Classes:
  `RMIConnectionImpl, RMIConnectionImpl_Stub`

public interface RMIConnection extends Closeable, Remote

RMI object used to forward an MBeanServer request from a client to its MBeanServer implementation on the server side. There is one Remote object implementing this interface for each remote client connected to an RMI connector.

User code does not usually refer to this interface. It is specified as part of the public API so that different implementations of that API will interoperate.

To ensure that client parameters will be deserialized at the server side with the correct classloader, client parameters such as parameters used to invoke a method are wrapped in a `MarshalledObject`. An implementation of this interface must first get the appropriate class loader for the operation and its target, then deserialize the marshalled parameters with this classloader. Except as noted, a parameter that is a `MarshalledObject` or `MarshalledObject[]` must not be null; the behavior is unspecified if it is.

Class loading aspects are detailed in the JMX Specification, version 1.4

Most methods in this interface parallel methods in the `MBeanServerConnection` interface. Where an aspect of the behavior of a method is not specified here, it is the same as in the corresponding `MBeanServerConnection` method.

JMX Subject Delegation has been removed. All methods that take a `delegationSubject` parameter will throw `UnsupportedOperationException` if it is non-null. This parameter is kept for interoperability with older remote clients.

Since:
  1.5

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `addNotificationListener(ObjectName name, ObjectName listener, MarshalledObject filter, MarshalledObject handback, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.addNotificationListener(ObjectName, ObjectName, NotificationFilter, Object)`.
  `Integer[]`
  `addNotificationListeners(ObjectName[] names, MarshalledObject[] filters, Subject[] delegationSubjects)`
  Handles the method `MBeanServerConnection.addNotificationListener(ObjectName, NotificationListener, NotificationFilter, Object)`.
  `void`
  `close()`
  Closes this connection.
  `ObjectInstance`
  `createMBean(String className, ObjectName name, MarshalledObject params, String[] signature, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.createMBean(String, ObjectName, Object[], String[])`.
  `ObjectInstance`
  `createMBean(String className, ObjectName name, ObjectName loaderName, MarshalledObject params, String[] signature, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.createMBean(String, ObjectName, ObjectName, Object[], String[])`.
  `ObjectInstance`
  `createMBean(String className, ObjectName name, ObjectName loaderName, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.createMBean(String, ObjectName, ObjectName)`.
  `ObjectInstance`
  `createMBean(String className, ObjectName name, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.createMBean(String, ObjectName)`.
  `NotificationResult`
  `fetchNotifications(long clientSequenceNumber, int maxNotifications, long timeout)`
  Retrieves notifications from the connector server.
  `Object`
  `getAttribute(ObjectName name, String attribute, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.getAttribute(ObjectName, String)`.
  `AttributeList`
  `getAttributes(ObjectName name, String[] attributes, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.getAttributes(ObjectName, String[])`.
  `String`
  `getConnectionId()`
  Returns the connection ID.
  `String`
  `getDefaultDomain(Subject delegationSubject)`
  Handles the method `MBeanServerConnection.getDefaultDomain()`.
  `String[]`
  `getDomains(Subject delegationSubject)`
  Handles the method `MBeanServerConnection.getDomains()`.
  `Integer`
  `getMBeanCount(Subject delegationSubject)`
  Handles the method `MBeanServerConnection.getMBeanCount()`.
  `MBeanInfo`
  `getMBeanInfo(ObjectName name, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.getMBeanInfo(ObjectName)`.
  `ObjectInstance`
  `getObjectInstance(ObjectName name, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.getObjectInstance(ObjectName)`.
  `Object`
  `invoke(ObjectName name, String operationName, MarshalledObject params, String[] signature, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.invoke(ObjectName, String, Object[], String[])`.
  `boolean`
  `isInstanceOf(ObjectName name, String className, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.isInstanceOf(ObjectName, String)`.
  `boolean`
  `isRegistered(ObjectName name, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.isRegistered(ObjectName)`.
  `Set<ObjectInstance>`
  `queryMBeans(ObjectName name, MarshalledObject query, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.queryMBeans(ObjectName, QueryExp)`.
  `Set<ObjectName>`
  `queryNames(ObjectName name, MarshalledObject query, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.queryNames(ObjectName, QueryExp)`.
  `void`
  `removeNotificationListener(ObjectName name, ObjectName listener, MarshalledObject filter, MarshalledObject handback, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.removeNotificationListener(ObjectName, ObjectName, NotificationFilter, Object)`.
  `void`
  `removeNotificationListener(ObjectName name, ObjectName listener, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.removeNotificationListener(ObjectName, ObjectName)`.
  `void`
  `removeNotificationListeners(ObjectName name, Integer[] listenerIDs, Subject delegationSubject)`
  Handles the `removeNotificationListener(ObjectName, NotificationListener)` and `removeNotificationListener(ObjectName, NotificationListener, NotificationFilter, Object)` methods.
  `void`
  `setAttribute(ObjectName name, MarshalledObject attribute, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.setAttribute(ObjectName, Attribute)`.
  `AttributeList`
  `setAttributes(ObjectName name, MarshalledObject attributes, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.setAttributes(ObjectName, AttributeList)`.
  `void`
  `unregisterMBean(ObjectName name, Subject delegationSubject)`
  Handles the method `MBeanServerConnection.unregisterMBean(ObjectName)`.

- ## Method Details

  - ### getConnectionId

    String getConnectionId() throws IOException

    Returns the connection ID. This string is different for every open connection to a given RMI connector server.

    Returns:
      the connection ID
    Throws:
      `IOException` - if a general communication exception occurred.
    See Also:
      - `RMIConnector.connect`

  - ### close

    void close() throws IOException

    Closes this connection. On return from this method, the RMI object implementing this interface is unexported, so further remote calls to it will fail.

    Specified by:
      `close` in interface `AutoCloseable`
    Specified by:
      `close` in interface `Closeable`
    Throws:
      `IOException` - if the connection could not be closed, or the Remote object could not be unexported, or there was a communication failure when transmitting the remote close request.

  - ### createMBean

    ObjectInstance createMBean(String className, ObjectName name, Subject delegationSubject) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException, NotCompliantMBeanException, IOException
    Handles the method `MBeanServerConnection.createMBean(String, ObjectName)`.
    Parameters:
      `className` - The class name of the MBean to be instantiated.
      `name` - The object name of the MBean. May be null.
      `delegationSubject` - must be `null`.
    Returns:
      An `ObjectInstance`, containing the `ObjectName` and the Java class name of the newly instantiated MBean. If the contained `ObjectName` is `n`, the contained Java class name is ``getMBeanInfo(n)`.getClassName()`.
    Throws:
      `ReflectionException` - Wraps a `java.lang.ClassNotFoundException` or a `java.lang.Exception` that occurred when trying to invoke the MBean's constructor.
      `InstanceAlreadyExistsException` - The MBean is already under the control of the MBean server.
      `MBeanRegistrationException` - The `preRegister` (`MBeanRegistration` interface) method of the MBean has thrown an exception. The MBean will not be registered.
      `MBeanException` - The constructor of the MBean has thrown an exception.
      `NotCompliantMBeanException` - This class is not a JMX compliant MBean.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The className passed in parameter is null, the `ObjectName` passed in parameter contains a pattern or no `ObjectName` is specified for the MBean.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### createMBean

    ObjectInstance createMBean(String className, ObjectName name, ObjectName loaderName, Subject delegationSubject) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException, NotCompliantMBeanException, InstanceNotFoundException, IOException
    Handles the method `MBeanServerConnection.createMBean(String, ObjectName, ObjectName)`.
    Parameters:
      `className` - The class name of the MBean to be instantiated.
      `name` - The object name of the MBean. May be null.
      `loaderName` - The object name of the class loader to be used.
      `delegationSubject` - must be `null`.
    Returns:
      An `ObjectInstance`, containing the `ObjectName` and the Java class name of the newly instantiated MBean. If the contained `ObjectName` is `n`, the contained Java class name is ``getMBeanInfo(n)`.getClassName()`.
    Throws:
      `ReflectionException` - Wraps a `java.lang.ClassNotFoundException` or a `java.lang.Exception` that occurred when trying to invoke the MBean's constructor.
      `InstanceAlreadyExistsException` - The MBean is already under the control of the MBean server.
      `MBeanRegistrationException` - The `preRegister` (`MBeanRegistration` interface) method of the MBean has thrown an exception. The MBean will not be registered.
      `MBeanException` - The constructor of the MBean has thrown an exception.
      `NotCompliantMBeanException` - This class is not a JMX compliant MBean.
      `InstanceNotFoundException` - The specified class loader is not registered in the MBean server.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The className passed in parameter is null, the `ObjectName` passed in parameter contains a pattern or no `ObjectName` is specified for the MBean.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### createMBean

    ObjectInstance createMBean(String className, ObjectName name, MarshalledObject params, String[] signature, Subject delegationSubject) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException, NotCompliantMBeanException, IOException
    Handles the method `MBeanServerConnection.createMBean(String, ObjectName, Object[], String[])`. The `Object[]` parameter is wrapped in a `MarshalledObject`.
    Parameters:
      `className` - The class name of the MBean to be instantiated.
      `name` - The object name of the MBean. May be null.
      `params` - An array containing the parameters of the constructor to be invoked, encapsulated into a `MarshalledObject`. The encapsulated array can be null, equivalent to an empty array.
      `signature` - An array containing the signature of the constructor to be invoked. Can be null, equivalent to an empty array.
      `delegationSubject` - must be `null`.
    Returns:
      An `ObjectInstance`, containing the `ObjectName` and the Java class name of the newly instantiated MBean. If the contained `ObjectName` is `n`, the contained Java class name is ``getMBeanInfo(n)`.getClassName()`.
    Throws:
      `ReflectionException` - Wraps a `java.lang.ClassNotFoundException` or a `java.lang.Exception` that occurred when trying to invoke the MBean's constructor.
      `InstanceAlreadyExistsException` - The MBean is already under the control of the MBean server.
      `MBeanRegistrationException` - The `preRegister` (`MBeanRegistration` interface) method of the MBean has thrown an exception. The MBean will not be registered.
      `MBeanException` - The constructor of the MBean has thrown an exception.
      `NotCompliantMBeanException` - This class is not a JMX compliant MBean.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The className passed in parameter is null, the `ObjectName` passed in parameter contains a pattern, or no `ObjectName` is specified for the MBean.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### createMBean

    ObjectInstance createMBean(String className, ObjectName name, ObjectName loaderName, MarshalledObject params, String[] signature, Subject delegationSubject) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException, NotCompliantMBeanException, InstanceNotFoundException, IOException
    Handles the method `MBeanServerConnection.createMBean(String, ObjectName, ObjectName, Object[], String[])`. The `Object[]` parameter is wrapped in a `MarshalledObject`.
    Parameters:
      `className` - The class name of the MBean to be instantiated.
      `name` - The object name of the MBean. May be null.
      `loaderName` - The object name of the class loader to be used.
      `params` - An array containing the parameters of the constructor to be invoked, encapsulated into a `MarshalledObject`. The encapsulated array can be null, equivalent to an empty array.
      `signature` - An array containing the signature of the constructor to be invoked. Can be null, equivalent to an empty array.
      `delegationSubject` - must be `null`.
    Returns:
      An `ObjectInstance`, containing the `ObjectName` and the Java class name of the newly instantiated MBean. If the contained `ObjectName` is `n`, the contained Java class name is ``getMBeanInfo(n)`.getClassName()`.
    Throws:
      `ReflectionException` - Wraps a `java.lang.ClassNotFoundException` or a `java.lang.Exception` that occurred when trying to invoke the MBean's constructor.
      `InstanceAlreadyExistsException` - The MBean is already under the control of the MBean server.
      `MBeanRegistrationException` - The `preRegister` (`MBeanRegistration` interface) method of the MBean has thrown an exception. The MBean will not be registered.
      `MBeanException` - The constructor of the MBean has thrown an exception.
      `NotCompliantMBeanException` - This class is not a JMX compliant MBean.
      `InstanceNotFoundException` - The specified class loader is not registered in the MBean server.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The className passed in parameter is null, the `ObjectName` passed in parameter contains a pattern, or no `ObjectName` is specified for the MBean.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### unregisterMBean

    void unregisterMBean(ObjectName name, Subject delegationSubject) throws InstanceNotFoundException, MBeanRegistrationException, IOException
    Handles the method `MBeanServerConnection.unregisterMBean(ObjectName)`.
    Parameters:
      `name` - The object name of the MBean to be unregistered.
      `delegationSubject` - must be `null`.
    Throws:
      `InstanceNotFoundException` - The MBean specified is not registered in the MBean server.
      `MBeanRegistrationException` - The preDeregister (`MBeanRegistration` interface) method of the MBean has thrown an exception.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The object name in parameter is null or the MBean you are when trying to unregister is the `MBeanServerDelegate` MBean.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### getObjectInstance

    ObjectInstance getObjectInstance(ObjectName name, Subject delegationSubject) throws InstanceNotFoundException, IOException
    Handles the method `MBeanServerConnection.getObjectInstance(ObjectName)`.
    Parameters:
      `name` - The object name of the MBean.
      `delegationSubject` - must be `null`.
    Returns:
      The `ObjectInstance` associated with the MBean specified by name. The contained `ObjectName` is `name` and the contained class name is ``getMBeanInfo(name)`.getClassName()`.
    Throws:
      `InstanceNotFoundException` - The MBean specified is not registered in the MBean server.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The object name in parameter is null.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### queryMBeans

    Set<ObjectInstance> queryMBeans(ObjectName name, MarshalledObject query, Subject delegationSubject) throws IOException
    Handles the method `MBeanServerConnection.queryMBeans(ObjectName, QueryExp)`. The `QueryExp` is wrapped in a `MarshalledObject`.
    Parameters:
      `name` - The object name pattern identifying the MBeans to be retrieved. If null or no domain and key properties are specified, all the MBeans registered will be retrieved.
      `query` - The query expression to be applied for selecting MBeans, encapsulated into a `MarshalledObject`. If the `MarshalledObject` encapsulates a null value no query expression will be applied for selecting MBeans.
      `delegationSubject` - must be `null`.
    Returns:
      A set containing the `ObjectInstance` objects for the selected MBeans. If no MBean satisfies the query an empty list is returned.
    Throws:
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### queryNames

    Set<ObjectName> queryNames(ObjectName name, MarshalledObject query, Subject delegationSubject) throws IOException
    Handles the method `MBeanServerConnection.queryNames(ObjectName, QueryExp)`. The `QueryExp` is wrapped in a `MarshalledObject`.
    Parameters:
      `name` - The object name pattern identifying the MBean names to be retrieved. If null or no domain and key properties are specified, the name of all registered MBeans will be retrieved.
      `query` - The query expression to be applied for selecting MBeans, encapsulated into a `MarshalledObject`. If the `MarshalledObject` encapsulates a null value no query expression will be applied for selecting MBeans.
      `delegationSubject` - must be `null`.
    Returns:
      A set containing the ObjectNames for the MBeans selected. If no MBean satisfies the query, an empty list is returned.
    Throws:
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### isRegistered

    boolean isRegistered(ObjectName name, Subject delegationSubject) throws IOException
    Handles the method `MBeanServerConnection.isRegistered(ObjectName)`.
    Parameters:
      `name` - The object name of the MBean to be checked.
      `delegationSubject` - must be `null`.
    Returns:
      True if the MBean is already registered in the MBean server, false otherwise.
    Throws:
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The object name in parameter is null.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### getMBeanCount

    Integer getMBeanCount(Subject delegationSubject) throws IOException
    Handles the method `MBeanServerConnection.getMBeanCount()`.
    Parameters:
      `delegationSubject` - must be `null`.
    Returns:
      the number of MBeans registered.
    Throws:
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### getAttribute

    Object getAttribute(ObjectName name, String attribute, Subject delegationSubject) throws MBeanException, AttributeNotFoundException, InstanceNotFoundException, ReflectionException, IOException
    Handles the method `MBeanServerConnection.getAttribute(ObjectName, String)`.
    Parameters:
      `name` - The object name of the MBean from which the attribute is to be retrieved.
      `attribute` - A String specifying the name of the attribute to be retrieved.
      `delegationSubject` - must be `null`.
    Returns:
      The value of the retrieved attribute.
    Throws:
      `AttributeNotFoundException` - The attribute specified is not accessible in the MBean.
      `MBeanException` - Wraps an exception thrown by the MBean's getter.
      `InstanceNotFoundException` - The MBean specified is not registered in the MBean server.
      `ReflectionException` - Wraps a `java.lang.Exception` thrown when trying to invoke the getter.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The object name in parameter is null or the attribute in parameter is null.
      `RuntimeMBeanException` - Wraps a runtime exception thrown by the MBean's getter.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.
    See Also:
      - `setAttribute(ObjectName, MarshalledObject, Subject)`

  - ### getAttributes

    AttributeList getAttributes(ObjectName name, String[] attributes, Subject delegationSubject) throws InstanceNotFoundException, ReflectionException, IOException
    Handles the method `MBeanServerConnection.getAttributes(ObjectName, String[])`.
    Parameters:
      `name` - The object name of the MBean from which the attributes are retrieved.
      `attributes` - A list of the attributes to be retrieved.
      `delegationSubject` - must be `null`.
    Returns:
      The list of the retrieved attributes.
    Throws:
      `InstanceNotFoundException` - The MBean specified is not registered in the MBean server.
      `ReflectionException` - An exception occurred when trying to invoke the getAttributes method of a Dynamic MBean.
      `RuntimeOperationsException` - Wrap a `java.lang.IllegalArgumentException`: The object name in parameter is null or attributes in parameter is null.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.
    See Also:
      - `setAttributes(ObjectName, MarshalledObject, Subject)`

  - ### setAttribute

    void setAttribute(ObjectName name, MarshalledObject attribute, Subject delegationSubject) throws InstanceNotFoundException, AttributeNotFoundException, InvalidAttributeValueException, MBeanException, ReflectionException, IOException
    Handles the method `MBeanServerConnection.setAttribute(ObjectName, Attribute)`. The `Attribute` parameter is wrapped in a `MarshalledObject`.
    Parameters:
      `name` - The name of the MBean within which the attribute is to be set.
      `attribute` - The identification of the attribute to be set and the value it is to be set to, encapsulated into a `MarshalledObject`.
      `delegationSubject` - must be `null`.
    Throws:
      `InstanceNotFoundException` - The MBean specified is not registered in the MBean server.
      `AttributeNotFoundException` - The attribute specified is not accessible in the MBean.
      `InvalidAttributeValueException` - The value specified for the attribute is not valid.
      `MBeanException` - Wraps an exception thrown by the MBean's setter.
      `ReflectionException` - Wraps a `java.lang.Exception` thrown when trying to invoke the setter.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The object name in parameter is null or the attribute in parameter is null.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.
    See Also:
      - `getAttribute(ObjectName, String, Subject)`

  - ### setAttributes

    AttributeList setAttributes(ObjectName name, MarshalledObject attributes, Subject delegationSubject) throws InstanceNotFoundException, ReflectionException, IOException
    Handles the method `MBeanServerConnection.setAttributes(ObjectName, AttributeList)`. The `AttributeList` parameter is wrapped in a `MarshalledObject`.
    Parameters:
      `name` - The object name of the MBean within which the attributes are to be set.
      `attributes` - A list of attributes: The identification of the attributes to be set and the values they are to be set to, encapsulated into a `MarshalledObject`.
      `delegationSubject` - must be `null`.
    Returns:
      The list of attributes that were set, with their new values.
    Throws:
      `InstanceNotFoundException` - The MBean specified is not registered in the MBean server.
      `ReflectionException` - An exception occurred when trying to invoke the getAttributes method of a Dynamic MBean.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The object name in parameter is null or attributes in parameter is null.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.
    See Also:
      - `getAttributes(ObjectName, String[], Subject)`

  - ### invoke

    Object invoke(ObjectName name, String operationName, MarshalledObject params, String[] signature, Subject delegationSubject) throws InstanceNotFoundException, MBeanException, ReflectionException, IOException
    Handles the method `MBeanServerConnection.invoke(ObjectName, String, Object[], String[])`. The `Object[]` parameter is wrapped in a `MarshalledObject`.
    Parameters:
      `name` - The object name of the MBean on which the method is to be invoked.
      `operationName` - The name of the operation to be invoked.
      `params` - An array containing the parameters to be set when the operation is invoked, encapsulated into a `MarshalledObject`. The encapsulated array can be null, equivalent to an empty array.
      `signature` - An array containing the signature of the operation. The class objects will be loaded using the same class loader as the one used for loading the MBean on which the operation was invoked. Can be null, equivalent to an empty array.
      `delegationSubject` - must be `null`.
    Returns:
      The object returned by the operation, which represents the result of invoking the operation on the MBean specified.
    Throws:
      `InstanceNotFoundException` - The MBean specified is not registered in the MBean server.
      `MBeanException` - Wraps an exception thrown by the MBean's invoked method.
      `ReflectionException` - Wraps a `java.lang.Exception` thrown while trying to invoke the method.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `RuntimeOperationsException` - Wraps an `IllegalArgumentException` when `name` or `operationName` is null.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### getDefaultDomain

    String getDefaultDomain(Subject delegationSubject) throws IOException
    Handles the method `MBeanServerConnection.getDefaultDomain()`.
    Parameters:
      `delegationSubject` - must be `null`.
    Returns:
      the default domain.
    Throws:
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### getDomains

    String[] getDomains(Subject delegationSubject) throws IOException
    Handles the method `MBeanServerConnection.getDomains()`.
    Parameters:
      `delegationSubject` - must be `null`.
    Returns:
      the list of domains.
    Throws:
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### getMBeanInfo

    MBeanInfo getMBeanInfo(ObjectName name, Subject delegationSubject) throws InstanceNotFoundException, IntrospectionException, ReflectionException, IOException
    Handles the method `MBeanServerConnection.getMBeanInfo(ObjectName)`.
    Parameters:
      `name` - The name of the MBean to analyze
      `delegationSubject` - must be `null`.
    Returns:
      An instance of `MBeanInfo` allowing the retrieval of all attributes and operations of this MBean.
    Throws:
      `IntrospectionException` - An exception occurred during introspection.
      `InstanceNotFoundException` - The MBean specified was not found.
      `ReflectionException` - An exception occurred when trying to invoke the getMBeanInfo of a Dynamic MBean.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The object name in parameter is null.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### isInstanceOf

    boolean isInstanceOf(ObjectName name, String className, Subject delegationSubject) throws InstanceNotFoundException, IOException
    Handles the method `MBeanServerConnection.isInstanceOf(ObjectName, String)`.
    Parameters:
      `name` - The `ObjectName` of the MBean.
      `className` - The name of the class.
      `delegationSubject` - must be `null`.
    Returns:
      true if the MBean specified is an instance of the specified class according to the rules above, false otherwise.
    Throws:
      `InstanceNotFoundException` - The MBean specified is not registered in the MBean server.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `RuntimeOperationsException` - Wraps a `java.lang.IllegalArgumentException`: The object name in parameter is null.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### addNotificationListener

    void addNotificationListener(ObjectName name, ObjectName listener, MarshalledObject filter, MarshalledObject handback, Subject delegationSubject) throws InstanceNotFoundException, IOException
    Handles the method `MBeanServerConnection.addNotificationListener(ObjectName, ObjectName, NotificationFilter, Object)`. The `NotificationFilter` parameter is wrapped in a `MarshalledObject`. The `Object` (handback) parameter is also wrapped in a `MarshalledObject`.
    Parameters:
      `name` - The name of the MBean on which the listener should be added.
      `listener` - The object name of the listener which will handle the notifications emitted by the registered MBean.
      `filter` - The filter object, encapsulated into a `MarshalledObject`. If filter encapsulated in the `MarshalledObject` has a null value, no filtering will be performed before handling notifications.
      `handback` - The context to be sent to the listener when a notification is emitted, encapsulated into a `MarshalledObject`.
      `delegationSubject` - must be `null`.
    Throws:
      `InstanceNotFoundException` - The MBean name of the notification listener or of the notification broadcaster does not match any of the registered MBeans.
      `RuntimeOperationsException` - Wraps an `IllegalArgumentException`. The MBean named by `listener` exists but does not implement the `NotificationListener` interface, or `name` or `listener` is null.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.
    See Also:
      - `removeNotificationListener(ObjectName, ObjectName, Subject)`
      - `removeNotificationListener(ObjectName, ObjectName, MarshalledObject, MarshalledObject, Subject)`

  - ### removeNotificationListener

    void removeNotificationListener(ObjectName name, ObjectName listener, Subject delegationSubject) throws InstanceNotFoundException, ListenerNotFoundException, IOException
    Handles the method `MBeanServerConnection.removeNotificationListener(ObjectName, ObjectName)`.
    Parameters:
      `name` - The name of the MBean on which the listener should be removed.
      `listener` - The object name of the listener to be removed.
      `delegationSubject` - must be `null`.
    Throws:
      `InstanceNotFoundException` - The MBean name provided does not match any of the registered MBeans.
      `ListenerNotFoundException` - The listener is not registered in the MBean.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `RuntimeOperationsException` - Wraps an `IllegalArgumentException` when `name` or `listener` is null.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.
    See Also:
      - `addNotificationListener(ObjectName, ObjectName, MarshalledObject, MarshalledObject, Subject)`

  - ### removeNotificationListener

    void removeNotificationListener(ObjectName name, ObjectName listener, MarshalledObject filter, MarshalledObject handback, Subject delegationSubject) throws InstanceNotFoundException, ListenerNotFoundException, IOException
    Handles the method `MBeanServerConnection.removeNotificationListener(ObjectName, ObjectName, NotificationFilter, Object)`. The `NotificationFilter` parameter is wrapped in a `MarshalledObject`. The `Object` parameter is also wrapped in a `MarshalledObject`.
    Parameters:
      `name` - The name of the MBean on which the listener should be removed.
      `listener` - A listener that was previously added to this MBean.
      `filter` - The filter that was specified when the listener was added, encapsulated into a `MarshalledObject`.
      `handback` - The handback that was specified when the listener was added, encapsulated into a `MarshalledObject`.
      `delegationSubject` - must be `null`.
    Throws:
      `InstanceNotFoundException` - The MBean name provided does not match any of the registered MBeans.
      `ListenerNotFoundException` - The listener is not registered in the MBean, or it is not registered with the given filter and handback.
      `SecurityException` - if the client is not authorized to perform this operation.
      `IOException` - if a general communication exception occurred.
      `RuntimeOperationsException` - Wraps an `IllegalArgumentException` when `name` or `listener` is null.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.
    See Also:
      - `addNotificationListener(ObjectName, ObjectName, MarshalledObject, MarshalledObject, Subject)`

  - ### addNotificationListeners

    Integer[] addNotificationListeners(ObjectName[] names, MarshalledObject[] filters, Subject[] delegationSubjects) throws InstanceNotFoundException, IOException

    Handles the method `MBeanServerConnection.addNotificationListener(ObjectName, NotificationListener, NotificationFilter, Object)`.

    Register for notifications from the given MBeans that match the given filters. The remote client can subsequently retrieve the notifications using the `fetchNotifications` method.

    For each listener, the original `NotificationListener` and `handback` are kept on the client side; in order for the client to be able to identify them, the server generates and returns a unique `listenerID`. This `listenerID` is forwarded with the `Notifications` to the remote client.

    If any one of the given (name, filter) pairs cannot be registered, then the operation fails with an exception, and no names or filters are registered.

    Parameters:
      `names` - the `ObjectNames` identifying the MBeans emitting the Notifications.
      `filters` - an array of marshalled representations of the `NotificationFilters`. Elements of this array can be null.
      `delegationSubjects` - must be `null`, or an array which does not contain any non-null entries.
    Returns:
      an array of `listenerIDs` identifying the local listeners. This array has the same number of elements as the parameters.
    Throws:
      `IllegalArgumentException` - if `names` or `filters` is null, or if `names` contains a null element, or if these two arrays do not have the same size.
      `ClassCastException` - if one of the elements of `filters` unmarshalls as a non-null object that is not a `NotificationFilter`.
      `InstanceNotFoundException` - if one of the `names` does not correspond to any registered MBean.
      `SecurityException` - if, for one of the MBeans, the client is not authorized to add a listener.
      `IOException` - if a general communication exception occurred.
      `UnsupportedOperationException` - if `delegationSubjects` is non-null and contains any non-null entries.

  - ### removeNotificationListeners

    void removeNotificationListeners(ObjectName name, Integer[] listenerIDs, Subject delegationSubject) throws InstanceNotFoundException, ListenerNotFoundException, IOException

    Handles the `removeNotificationListener(ObjectName, NotificationListener)` and `removeNotificationListener(ObjectName, NotificationListener, NotificationFilter, Object)` methods.

    This method removes one or more `NotificationListener`s from a given MBean in the MBean server.

    The `NotificationListeners` are identified by the IDs which were returned by the `addNotificationListeners(ObjectName[], MarshalledObject[], Subject[])` method.

    Parameters:
      `name` - the `ObjectName` identifying the MBean emitting the Notifications.
      `listenerIDs` - the list of the IDs corresponding to the listeners to remove.
      `delegationSubject` - must be `null`.
    Throws:
      `InstanceNotFoundException` - if the given `name` does not correspond to any registered MBean.
      `ListenerNotFoundException` - if one of the listeners was not found on the server side. This exception can happen if the MBean discarded a listener for some reason other than a call to `MBeanServer.removeNotificationListener`.
      `SecurityException` - if the client is not authorized to remove the listeners.
      `IOException` - if a general communication exception occurred.
      `IllegalArgumentException` - if `ObjectName` or `listenerIds` is null or if `listenerIds` contains a null element.
      `UnsupportedOperationException` - if `delegationSubject` is non-null.

  - ### fetchNotifications

    NotificationResult fetchNotifications(long clientSequenceNumber, int maxNotifications, long timeout) throws IOException

    Retrieves notifications from the connector server. This method can block until there is at least one notification or until the specified timeout is reached. The method can also return at any time with zero notifications.

    A notification can be included in the result if its sequence number is no less than `clientSequenceNumber` and this client has registered at least one listener for the MBean generating the notification, with a filter that accepts the notification. Each listener that is interested in the notification is identified by an Integer ID that was returned by `addNotificationListeners(ObjectName[], MarshalledObject[], Subject[])`.

    Parameters:
      `clientSequenceNumber` - the first sequence number that the client is interested in. If negative, it is interpreted as meaning the sequence number that the next notification will have.
      `maxNotifications` - the maximum number of different notifications to return. The `TargetedNotification` array in the returned `NotificationResult` can have more elements than this if the same notification appears more than once. The behavior is unspecified if this parameter is negative.
      `timeout` - the maximum time in milliseconds to wait for a notification to arrive. This can be 0 to indicate that the method should not wait if there are no notifications, but should return at once. It can be `Long.MAX_VALUE` to indicate that there is no timeout. The behavior is unspecified if this parameter is negative.
    Returns:
      A `NotificationResult`.
    Throws:
      `IOException` - if a general communication exception occurred.