# Class ConnectionClosedEvent

java.lang.Object
java.util.EventObject
com.sun.messaging.jms.notification.Event
com.sun.messaging.jms.notification.ConnectionEvent
com.sun.messaging.jms.notification.ConnectionClosedEvent

All Implemented Interfaces:
  `Serializable`

public class ConnectionClosedEvent extends ConnectionEvent
MQ Connection closed Event. This event is generated by MQ and delivered to an application (if the connection event listener is set) when a connection is closed by MQ.

See Also:
  - Serialized Form

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final String`
  `CONNECTION_CLOSED_BROKER_DOWN`
  Connection closed event code - broker crash.
  `static final String`
  `CONNECTION_CLOSED_ERROR`
  Connection closed event code - server error, e.g.
  `static final String`
  `CONNECTION_CLOSED_KILL`
  Connection closed event code - admin killed connection.
  `static final String`
  `CONNECTION_CLOSED_LOST_CONNECTION`
  The above event codes are for events originated from the broker.
  `static final String`
  `CONNECTION_CLOSED_NON_RESPONSIVE`
  Connection closed event code - broker is not responsive.
  `static final String`
  `CONNECTION_CLOSED_RESTART`
  Connection closed event code - admin requested restart
  `static final String`
  `CONNECTION_CLOSED_SHUTDOWN`
  Connection closed event code - admin requested shutdown

  ### Fields inherited from class ConnectionEvent

  `connection`

  ### Fields inherited from class EventObject

  `source`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `ConnectionClosedEvent(Connection conn, String evCode, String evMessage, jakarta.jms.JMSException jmse)`
  Construct a connection closed event.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `jakarta.jms.JMSException`
  `getJMSException()`
  Get the JMSException that caused the connection to be closed.

  ### Methods inherited from class ConnectionEvent

  `getBrokerAddress, getConnection, getSource`

  ### Methods inherited from class Event

  `getEventCode, getEventMessage, toString`

  ### Methods inherited from class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Field Details

  - ### CONNECTION_CLOSED_SHUTDOWN

    public static final String CONNECTION_CLOSED_SHUTDOWN
    Connection closed event code - admin requested shutdown
    See Also:
      - Constant Field Values

  - ### CONNECTION_CLOSED_RESTART

    public static final String CONNECTION_CLOSED_RESTART
    Connection closed event code - admin requested restart
    See Also:
      - Constant Field Values

  - ### CONNECTION_CLOSED_ERROR

    public static final String CONNECTION_CLOSED_ERROR
    Connection closed event code - server error, e.g. out of memory.
    See Also:
      - Constant Field Values

  - ### CONNECTION_CLOSED_KILL

    public static final String CONNECTION_CLOSED_KILL
    Connection closed event code - admin killed connection.
    See Also:
      - Constant Field Values

  - ### CONNECTION_CLOSED_BROKER_DOWN

    public static final String CONNECTION_CLOSED_BROKER_DOWN
    Connection closed event code - broker crash.
    See Also:
      - Constant Field Values

  - ### CONNECTION_CLOSED_NON_RESPONSIVE

    public static final String CONNECTION_CLOSED_NON_RESPONSIVE
    Connection closed event code - broker is not responsive.
    See Also:
      - Constant Field Values

  - ### CONNECTION_CLOSED_LOST_CONNECTION

    public static final String CONNECTION_CLOSED_LOST_CONNECTION
    The above event codes are for events originated from the broker. Broker notifies MQ client runtime that the connection is closed. This event code is to represent that the MQ client runtime detects the connection to the broker is broken. This could be a network problem or broker crashed.
    See Also:
      - Constant Field Values

- ## Constructor Details

  - ### ConnectionClosedEvent

    public ConnectionClosedEvent(Connection conn, String evCode, String evMessage, jakarta.jms.JMSException jmse)
    Construct a connection closed event.
    Parameters:
      `conn` - the connection that the event is associated with. MQ may automatically reconnect to the same broker or a different broker depends on the client runtime configuration.
      `evCode` - the event code that represents this event object.
      `evMessage` - the event message that describes this event object.
      `jmse` - the JMSException that caused this event.

- ## Method Details

  - ### getJMSException

    public jakarta.jms.JMSException getJMSException()
    Get the JMSException that caused the connection to be closed.
    Returns:
      the JMSException that caused the connection to be closed. return null if no JMSException associated with this event. Such as connection closed caused by admin requested shutdown.