public class RMIConnector extends Object implements JMXConnector, Serializable, JMXAddressable
A connection to a remote RMI connector. Usually, such connections are made using JMXConnectorFactory
. However, specialized applications can use this class directly, for example with an RMIServer
stub obtained without going through JNDI.
CREDENTIALS
public RMIConnector(JMXServiceURL url, Map<String,?> environment)
Constructs an RMIConnector
that will connect the RMI connector server with the given address.
The address can refer directly to the connector server, using one of the following syntaxes:
service:jmx:rmi://[host[:port]]/stub/encoded-stub service:jmx:iiop://[host[:port]]/ior/encoded-IOR
(Here, the square brackets []
are not part of the address but indicate that the host and port are optional.)
The address can instead indicate where to find an RMI stub through JNDI, using one of the following syntaxes:
service:jmx:rmi://[host[:port]]/jndi/jndi-name service:jmx:iiop://[host[:port]]/jndi/jndi-name
An implementation may also recognize additional address syntaxes, for example:
service:jmx:iiop://[host[:port]]/stub/encoded-stub
url
- the address of the RMI connector server.environment
- additional attributes specifying how to make the connection. For JNDI-based addresses, these attributes can usefully include JNDI attributes recognized by InitialContext
. This parameter can be null, which is equivalent to an empty Map.IllegalArgumentException
- if url
is null.public RMIConnector(RMIServer rmiServer, Map<String,?> environment)
Constructs an RMIConnector
using the given RMI stub.
rmiServer
- an RMI stub representing the RMI connector server.environment
- additional attributes specifying how to make the connection. This parameter can be null, which is equivalent to an empty Map.IllegalArgumentException
- if rmiServer
is null.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.
public JMXServiceURL getAddress()
The address of this connector.
getAddress
in interface JMXAddressable
public void connect() throws IOException
Description copied from interface: JMXConnector
Establishes the connection to the connector server. This method is equivalent to connect(null)
.
connect
in interface JMXConnector
IOException
- if the connection could not be made because of a communication problem, or in the case of the iiop
protocol, that RMI/IIOP is not supportedpublic void connect(Map<String,?> environment) throws IOException
Description copied from interface: JMXConnector
Establishes the connection to the connector server.
If connect
has already been called successfully on this object, calling it again has no effect. If, however, JMXConnector.close()
was called after connect
, the new connect
will throw an IOException
.
Otherwise, either connect
has never been called on this object, or it has been called but produced an exception. Then calling connect
will attempt to establish a connection to the connector server.
connect
in interface JMXConnector
environment
- the properties of the connection. Properties in this map override properties in the map specified when the JMXConnector
was created, if any. This parameter can be null, which is equivalent to an empty map.IOException
- if the connection could not be made because of a communication problem, or in the case of the iiop
protocol, that RMI/IIOP is not supportedpublic String getConnectionId() throws IOException
Description copied from interface: JMXConnector
Gets this connection's ID from the connector server. For a given connector server, every connection will have a unique id which does not change during the lifetime of the connection.
getConnectionId
in interface JMXConnector
JMXConnectionNotification
s. The package description
describes the conventions for connection IDs.IOException
- if the connection ID cannot be obtained, for instance because the connection is closed or broken.public MBeanServerConnection getMBeanServerConnection() throws IOException
Description copied from interface: JMXConnector
Returns an MBeanServerConnection
object representing a remote MBean server. For a given JMXConnector
, two successful calls to this method will usually return the same MBeanServerConnection
object, though this is not required.
For each method in the returned MBeanServerConnection
, calling the method causes the corresponding method to be called in the remote MBean server. The value returned by the MBean server method is the value returned to the client. If the MBean server method produces an Exception
, the same Exception
is seen by the client. If the MBean server method, or the attempt to call it, produces an Error
, the Error
is wrapped in a JMXServerErrorException
, which is seen by the client.
Calling this method is equivalent to calling getMBeanServerConnection(null)
meaning that no delegation subject is specified and that all the operations called on the MBeanServerConnection
must use the authenticated subject, if any.
getMBeanServerConnection
in interface JMXConnector
MBeanServerConnection
interface by forwarding its methods to the remote MBean server.IOException
- if a valid MBeanServerConnection
cannot be created, for instance because the connection to the remote MBean server has not yet been established (with the connect
method), or it has been closed, or it has broken.public MBeanServerConnection getMBeanServerConnection(Subject delegationSubject) throws IOException
Description copied from interface: JMXConnector
Returns an MBeanServerConnection
object representing a remote MBean server on which operations are performed on behalf of the supplied delegation subject. For a given JMXConnector
and Subject
, two successful calls to this method will usually return the same MBeanServerConnection
object, though this is not required.
For each method in the returned MBeanServerConnection
, calling the method causes the corresponding method to be called in the remote MBean server on behalf of the given delegation subject instead of the authenticated subject. The value returned by the MBean server method is the value returned to the client. If the MBean server method produces an Exception
, the same Exception
is seen by the client. If the MBean server method, or the attempt to call it, produces an Error
, the Error
is wrapped in a JMXServerErrorException
, which is seen by the client.
getMBeanServerConnection
in interface JMXConnector
delegationSubject
- the Subject
on behalf of which requests will be performed. Can be null, in which case requests will be performed on behalf of the authenticated Subject, if any.MBeanServerConnection
interface by forwarding its methods to the remote MBean server on behalf of a given delegation subject.IOException
- if a valid MBeanServerConnection
cannot be created, for instance because the connection to the remote MBean server has not yet been established (with the connect
method), or it has been closed, or it has broken.public void addConnectionNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback)
Description copied from interface: JMXConnector
Adds a listener to be informed of changes in connection status. The listener will receive notifications of type JMXConnectionNotification
. An implementation can send other types of notifications too.
Any number of listeners can be added with this method. The same listener can be added more than once with the same or different values for the filter and handback. There is no special treatment of a duplicate entry. For example, if a listener is registered twice with no filter, then its handleNotification
method will be called twice for each notification.
addConnectionNotificationListener
in interface JMXConnector
listener
- a listener to receive connection status notifications.filter
- a filter to select which notifications are to be delivered to the listener, or null if all notifications are to be delivered.handback
- an object to be given to the listener along with each notification. Can be null.JMXConnector.removeConnectionNotificationListener(javax.management.NotificationListener)
, NotificationBroadcaster.addNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)
public void removeConnectionNotificationListener(NotificationListener listener) throws ListenerNotFoundException
Description copied from interface: JMXConnector
Removes a listener from the list to be informed of changes in status. The listener must previously have been added. If there is more than one matching listener, all are removed.
removeConnectionNotificationListener
in interface JMXConnector
listener
- a listener to receive connection status notifications.ListenerNotFoundException
- if the listener is not registered with this JMXConnector
.JMXConnector.removeConnectionNotificationListener(NotificationListener,
NotificationFilter, Object)
, JMXConnector.addConnectionNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)
, NotificationEmitter.removeNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)
public void removeConnectionNotificationListener(NotificationListener listener, NotificationFilter filter, Object handback) throws ListenerNotFoundException
Description copied from interface: JMXConnector
Removes a listener from the list to be informed of changes in status. The listener must previously have been added with the same three parameters. If there is more than one matching listener, only one is removed.
removeConnectionNotificationListener
in interface JMXConnector
listener
- a listener to receive connection status notifications.filter
- a filter to select which notifications are to be delivered to the listener. Can be null.handback
- an object to be given to the listener along with each notification. Can be null.ListenerNotFoundException
- if the listener is not registered with this JMXConnector
, or is not registered with the given filter and handback.JMXConnector.removeConnectionNotificationListener(NotificationListener)
, JMXConnector.addConnectionNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)
, NotificationEmitter.removeNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)
public void close() throws IOException
Description copied from interface: JMXConnector
Closes the client connection to its server. Any ongoing or new request using the MBeanServerConnection returned by JMXConnector.getMBeanServerConnection()
will get an IOException
.
If close
has already been called successfully on this object, calling it again has no effect. If close
has never been called, or if it was called but produced an exception, an attempt will be made to close the connection. This attempt can succeed, in which case close
will return normally, or it can generate an exception.
Closing a connection is a potentially slow operation. For example, if the server has crashed, the close operation might have to wait for a network protocol timeout. Callers that do not want to block in a close operation should do it in a separate thread.
close
in interface Closeable
close
in interface AutoCloseable
close
in interface JMXConnector
IOException
- if the connection cannot be closed cleanly. If this exception is thrown, it is not known whether the server end of the connection has been cleanly closed.
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