Closeable
, AutoCloseable
, Remote
, Unreferenced
, RMIConnection
public class RMIConnectionImpl extends Object implements RMIConnection, Unreferenced
Implementation of the RMIConnection
interface. User code will not usually reference this class.
Constructor | Description |
---|---|
RMIConnectionImpl |
Constructs a new RMIConnection . |
public RMIConnectionImpl(RMIServerImpl rmiServer, String connectionId, ClassLoader defaultClassLoader, Subject subject, Map<String,?> env)
RMIConnection
. This connection can be used with the JRMP transport. This object does not export itself: it is the responsibility of the caller to export it appropriately (see RMIJRMPServerImpl.makeClient(String,Subject)
).rmiServer
- The RMIServerImpl object for which this connection is created. The behavior is unspecified if this parameter is null.connectionId
- The ID for this connection. The behavior is unspecified if this parameter is null.defaultClassLoader
- The default ClassLoader to be used when deserializing marshalled objects. Can be null, to signify the bootstrap class loader.subject
- the authenticated subject to be used for authorization. Can be null, to signify that no subject has been authenticated.env
- the environment containing attributes for the new RMIServerImpl
. Can be null, equivalent to an empty map.public String getConnectionId() throws IOException
RMIConnection
Returns the connection ID. This string is different for every open connection to a given RMI connector server.
getConnectionId
in interface RMIConnection
IOException
- if a general communication exception occurred.public void close() throws IOException
RMIConnection
Closes this connection. On return from this method, the RMI object implementing this interface is unexported, so further remote calls to it will fail.
close
in interface AutoCloseable
close
in interface Closeable
close
in interface RMIConnection
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.public void unreferenced()
Unreferenced
unreferenced
in interface Unreferenced
public ObjectInstance createMBean(String className, ObjectName name, Subject delegationSubject) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException, NotCompliantMBeanException, IOException
RMIConnection
MBeanServerConnection.createMBean(String, ObjectName)
.createMBean
in interface RMIConnection
className
- The class name of the MBean to be instantiated.name
- The object name of the MBean. May be null.delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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()
.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.IOException
- if a general communication exception occurred.public ObjectInstance createMBean(String className, ObjectName name, ObjectName loaderName, Subject delegationSubject) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException, NotCompliantMBeanException, InstanceNotFoundException, IOException
RMIConnection
MBeanServerConnection.createMBean(String, ObjectName, ObjectName)
.createMBean
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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()
.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.IOException
- if a general communication exception occurred.public ObjectInstance createMBean(String className, ObjectName name, MarshalledObject params, String[] signature, Subject delegationSubject) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException, NotCompliantMBeanException, IOException
RMIConnection
MBeanServerConnection.createMBean(String, ObjectName, Object[], String[])
. The Object[]
parameter is wrapped in a MarshalledObject
.createMBean
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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()
.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.IOException
- if a general communication exception occurred.public ObjectInstance createMBean(String className, ObjectName name, ObjectName loaderName, MarshalledObject params, String[] signature, Subject delegationSubject) throws ReflectionException, InstanceAlreadyExistsException, MBeanRegistrationException, MBeanException, NotCompliantMBeanException, InstanceNotFoundException, IOException
RMIConnection
MBeanServerConnection.createMBean(String, ObjectName, ObjectName, Object[], String[])
. The Object[]
parameter is wrapped in a MarshalledObject
.createMBean
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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()
.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.IOException
- if a general communication exception occurred.public void unregisterMBean(ObjectName name, Subject delegationSubject) throws InstanceNotFoundException, MBeanRegistrationException, IOException
RMIConnection
MBeanServerConnection.unregisterMBean(ObjectName)
.unregisterMBean
in interface RMIConnection
name
- The object name of the MBean to be unregistered.delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.InstanceNotFoundException
- The MBean specified is not registered in the MBean server.MBeanRegistrationException
- The preDeregister (MBeanRegistration
interface) method of the MBean has thrown an exception.IOException
- if a general communication exception occurred.public ObjectInstance getObjectInstance(ObjectName name, Subject delegationSubject) throws InstanceNotFoundException, IOException
RMIConnection
MBeanServerConnection.getObjectInstance(ObjectName)
.getObjectInstance
in interface RMIConnection
name
- The object name of the MBean.delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.ObjectInstance
associated with the MBean specified by name. The contained ObjectName
is name
and the contained class name is getMBeanInfo(name)
.getClassName()
.InstanceNotFoundException
- The MBean specified is not registered in the MBean server.IOException
- if a general communication exception occurred.public Set<ObjectInstance> queryMBeans(ObjectName name, MarshalledObject query, Subject delegationSubject) throws IOException
RMIConnection
MBeanServerConnection.queryMBeans(ObjectName, QueryExp)
. The QueryExp
is wrapped in a MarshalledObject
.queryMBeans
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.ObjectInstance
objects for the selected MBeans. If no MBean satisfies the query an empty list is returned.IOException
- if a general communication exception occurred.public Set<ObjectName> queryNames(ObjectName name, MarshalledObject query, Subject delegationSubject) throws IOException
RMIConnection
MBeanServerConnection.queryNames(ObjectName, QueryExp)
. The QueryExp
is wrapped in a MarshalledObject
.queryNames
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.IOException
- if a general communication exception occurred.public boolean isRegistered(ObjectName name, Subject delegationSubject) throws IOException
RMIConnection
MBeanServerConnection.isRegistered(ObjectName)
.isRegistered
in interface RMIConnection
name
- The object name of the MBean to be checked.delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.IOException
- if a general communication exception occurred.public Integer getMBeanCount(Subject delegationSubject) throws IOException
RMIConnection
MBeanServerConnection.getMBeanCount()
.getMBeanCount
in interface RMIConnection
delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.IOException
- if a general communication exception occurred.public Object getAttribute(ObjectName name, String attribute, Subject delegationSubject) throws MBeanException, AttributeNotFoundException, InstanceNotFoundException, ReflectionException, IOException
RMIConnection
MBeanServerConnection.getAttribute(ObjectName, String)
.getAttribute
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.MBeanException
- Wraps an exception thrown by the MBean's getter.AttributeNotFoundException
- The attribute specified is not accessible in the MBean.InstanceNotFoundException
- The MBean specified is not registered in the MBean server.ReflectionException
- Wraps a java.lang.Exception
thrown when trying to invoke the getter.IOException
- if a general communication exception occurred.public AttributeList getAttributes(ObjectName name, String[] attributes, Subject delegationSubject) throws InstanceNotFoundException, ReflectionException, IOException
RMIConnection
MBeanServerConnection.getAttributes(ObjectName, String[])
.getAttributes
in interface RMIConnection
name
- The object name of the MBean from which the attributes are retrieved.attributes
- A list of the attributes to be retrieved.delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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.IOException
- if a general communication exception occurred.public void setAttribute(ObjectName name, MarshalledObject attribute, Subject delegationSubject) throws InstanceNotFoundException, AttributeNotFoundException, InvalidAttributeValueException, MBeanException, ReflectionException, IOException
RMIConnection
MBeanServerConnection.setAttribute(ObjectName, Attribute)
. The Attribute
parameter is wrapped in a MarshalledObject
.setAttribute
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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.IOException
- if a general communication exception occurred.public AttributeList setAttributes(ObjectName name, MarshalledObject attributes, Subject delegationSubject) throws InstanceNotFoundException, ReflectionException, IOException
RMIConnection
MBeanServerConnection.setAttributes(ObjectName, AttributeList)
. The AttributeList
parameter is wrapped in a MarshalledObject
.setAttributes
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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.IOException
- if a general communication exception occurred.public Object invoke(ObjectName name, String operationName, MarshalledObject params, String[] signature, Subject delegationSubject) throws InstanceNotFoundException, MBeanException, ReflectionException, IOException
RMIConnection
MBeanServerConnection.invoke(ObjectName, String, Object[], String[])
. The Object[]
parameter is wrapped in a MarshalledObject
.invoke
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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.IOException
- if a general communication exception occurred.public String getDefaultDomain(Subject delegationSubject) throws IOException
RMIConnection
MBeanServerConnection.getDefaultDomain()
.getDefaultDomain
in interface RMIConnection
delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.IOException
- if a general communication exception occurred.public String[] getDomains(Subject delegationSubject) throws IOException
RMIConnection
MBeanServerConnection.getDomains()
.getDomains
in interface RMIConnection
delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.IOException
- if a general communication exception occurred.public MBeanInfo getMBeanInfo(ObjectName name, Subject delegationSubject) throws InstanceNotFoundException, IntrospectionException, ReflectionException, IOException
RMIConnection
MBeanServerConnection.getMBeanInfo(ObjectName)
.getMBeanInfo
in interface RMIConnection
name
- The name of the MBean to analyzedelegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.MBeanInfo
allowing the retrieval of all attributes and operations of this MBean.InstanceNotFoundException
- The MBean specified was not found.IntrospectionException
- An exception occurred during introspection.ReflectionException
- An exception occurred when trying to invoke the getMBeanInfo of a Dynamic MBean.IOException
- if a general communication exception occurred.public boolean isInstanceOf(ObjectName name, String className, Subject delegationSubject) throws InstanceNotFoundException, IOException
RMIConnection
MBeanServerConnection.isInstanceOf(ObjectName, String)
.isInstanceOf
in interface RMIConnection
name
- The ObjectName
of the MBean.className
- The name of the class.delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.InstanceNotFoundException
- The MBean specified is not registered in the MBean server.IOException
- if a general communication exception occurred.public Integer[] addNotificationListeners(ObjectName[] names, MarshalledObject[] filters, Subject[] delegationSubjects) throws InstanceNotFoundException, IOException
RMIConnection
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.
addNotificationListeners
in interface RMIConnection
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
- the Subjects
on behalf of which the listeners are being added. Elements of this array can be null. Also, the delegationSubjects
parameter itself can be null, which is equivalent to an array of null values with the same size as the names
and filters
arrays.listenerIDs
identifying the local listeners. This array has the same number of elements as the parameters.InstanceNotFoundException
- if one of the names
does not correspond to any registered MBean.IOException
- if a general communication exception occurred.public void addNotificationListener(ObjectName name, ObjectName listener, MarshalledObject filter, MarshalledObject handback, Subject delegationSubject) throws InstanceNotFoundException, IOException
RMIConnection
MBeanServerConnection.addNotificationListener(ObjectName, ObjectName, NotificationFilter, Object)
. The NotificationFilter
parameter is wrapped in a MarshalledObject
. The Object
(handback) parameter is also wrapped in a MarshalledObject
.addNotificationListener
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.InstanceNotFoundException
- The MBean name of the notification listener or of the notification broadcaster does not match any of the registered MBeans.IOException
- if a general communication exception occurred.public void removeNotificationListeners(ObjectName name, Integer[] listenerIDs, Subject delegationSubject) throws InstanceNotFoundException, ListenerNotFoundException, IOException
RMIConnection
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 RMIConnection.addNotificationListeners(ObjectName[], MarshalledObject[], Subject[])
method.
removeNotificationListeners
in interface RMIConnection
name
- the ObjectName
identifying the MBean emitting the Notifications.listenerIDs
- the list of the IDs corresponding to the listeners to remove.delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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
.IOException
- if a general communication exception occurred.public void removeNotificationListener(ObjectName name, ObjectName listener, Subject delegationSubject) throws InstanceNotFoundException, ListenerNotFoundException, IOException
RMIConnection
MBeanServerConnection.removeNotificationListener(ObjectName, ObjectName)
.removeNotificationListener
in interface RMIConnection
name
- The name of the MBean on which the listener should be removed.listener
- The object name of the listener to be removed.delegationSubject
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.InstanceNotFoundException
- The MBean name provided does not match any of the registered MBeans.ListenerNotFoundException
- The listener is not registered in the MBean.IOException
- if a general communication exception occurred.public void removeNotificationListener(ObjectName name, ObjectName listener, MarshalledObject filter, MarshalledObject handback, Subject delegationSubject) throws InstanceNotFoundException, ListenerNotFoundException, IOException
RMIConnection
MBeanServerConnection.removeNotificationListener(ObjectName, ObjectName, NotificationFilter, Object)
. The NotificationFilter
parameter is wrapped in a MarshalledObject
. The Object
parameter is also wrapped in a MarshalledObject
.removeNotificationListener
in interface RMIConnection
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
- The Subject
containing the delegation principals or null
if the authentication principal is used instead.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.IOException
- if a general communication exception occurred.public NotificationResult fetchNotifications(long clientSequenceNumber, int maxNotifications, long timeout) throws IOException
RMIConnection
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 RMIConnection.addNotificationListeners(ObjectName[], MarshalledObject[], Subject[])
.
fetchNotifications
in interface RMIConnection
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.NotificationResult
.IOException
- if a general communication exception occurred.public String toString()
Returns a string representation of this object. In general, the toString
method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read.
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Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.management.rmi/javax/management/remote/rmi/RMIConnectionImpl.html