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## javax.management.remote
Class JMXConnectionNotification

    java.lang.Object
      java.util.EventObject
          javax.management.Notification
              javax.management.remote.JMXConnectionNotification

All Implemented Interfaces:
  Serializable

    public class JMXConnectionNotification

extends Notification

Notification emitted when a client connection is opened or closed or when notifications are lost. These notifications are sent by connector servers (instances of `JMXConnectorServer`) and by connector clients (instances of `JMXConnector`). For certain connectors, a session can consist of a sequence of connections. Connection-opened and connection-closed notifications will be sent for each one.

The notification type is one of the following:

Type | Meaning
--- | ---
`jmx.remote.connection.opened` | A new client connection has been opened.
`jmx.remote.connection.closed` | A client connection has been closed.
`jmx.remote.connection.failed` | A client connection has failed unexpectedly.
`jmx.remote.connection.notifs.lost` | A client connection has potentially lost notifications. This notification only appears on the client side.

The `timeStamp` of the notification is a time value (consistent with `System.currentTimeMillis()`) indicating when the notification was constructed.

Since:
  1.5
See Also:
  Serialized Form

Field Summary
`static String` | `CLOSED` Notification type string for a connection-closed notification.
`static String` | `FAILED` Notification type string for a connection-failed notification.
`static String` | `NOTIFS_LOST` Notification type string for a connection that has possibly lost notifications.
`static String` | `OPENED` Notification type string for a connection-opened notification.

Fields inherited from class javax.management.Notification
`source`

Constructor Summary
`JMXConnectionNotification(String type, Object source, String connectionId, long sequenceNumber, String message, Object userData)` Constructs a new connection notification.

Method Summary
`String` | `getConnectionId()` The connection ID to which this notification pertains.

Methods inherited from class javax.management.Notification
`getMessage, getSequenceNumber, getTimeStamp, getType, getUserData, setSequenceNumber, setSource, setTimeStamp, setUserData, toString`

Methods inherited from class java.util.EventObject
`getSource`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

### OPENED

    public static final String OPENED

  Notification type string for a connection-opened notification.

  See Also:
    Constant Field Values

### CLOSED

    public static final String CLOSED

  Notification type string for a connection-closed notification.

  See Also:
    Constant Field Values

### FAILED

    public static final String FAILED

  Notification type string for a connection-failed notification.

  See Also:
    Constant Field Values

### NOTIFS_LOST

    public static final String NOTIFS_LOST

  Notification type string for a connection that has possibly lost notifications.

  See Also:
    Constant Field Values

Constructor Detail

### JMXConnectionNotification

    public JMXConnectionNotification(String type,
                                     Object source,
                                     String connectionId,
                                     long sequenceNumber,
                                     String message,
                                     Object userData)

  Constructs a new connection notification. The `source` of the notification depends on whether it is being sent by a connector server or a connector client:
  - For a connector server, if it is registered in an MBean server, the source is the `ObjectName` under which it is registered. Otherwise, it is a reference to the connector server object itself, an instance of a subclass of `JMXConnectorServer`.
  - For a connector client, the source is a reference to the connector client object, an instance of a class implementing `JMXConnector`.

  Parameters:
    `type` - the type of the notification. This is usually one of the constants `OPENED`, `CLOSED`, `FAILED`, `NOTIFS_LOST`. It is not an error for it to be a different string.
    `source` - the connector server or client emitting the notification.
    `connectionId` - the ID of the connection within its connector server.
    `sequenceNumber` - a non-negative integer. It is expected but not required that this number will be greater than any previous `sequenceNumber` in a notification from this source.
    `message` - an unspecified text message, typically containing a human-readable description of the event. Can be null.
    `userData` - an object whose type and meaning is defined by the connector server. Can be null.
  Throws:
    `NullPointerException` - if `type`, `source`, or `connectionId` is null.
    `IllegalArgumentException` - if `sequenceNumber` is negative.

Method Detail

### getConnectionId

    public String getConnectionId()

  The connection ID to which this notification pertains.

  Returns:
    the connection ID.

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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright 2008 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.