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package javax.sql;

import java.sql.SQLException;

An Event object that provides information about the source of a connection-related event. ConnectionEvent objects are generated when an application closes a pooled connection and when an error occurs. The ConnectionEvent object contains two kinds of information: 

  
The pooled connection closed by the application
  
In the case of an error event, the SQLException about to be thrown to the application 
Since:
1.4/**
 * <P>An {@code Event} object that provides information about the
 * source of a connection-related event.  {@code ConnectionEvent}
 * objects are generated when an application closes a pooled connection
 * and when an error occurs.  The {@code ConnectionEvent} object
 * contains two kinds of information:
 * <UL>
 *   <LI>The pooled connection closed by the application
 *   <LI>In the case of an error event, the {@code SQLException}
 *       about to be thrown to the application
 * </UL>
 *
 * @since 1.4
 */

public class ConnectionEvent extends java.util.EventObject {

  
Constructs a ConnectionEvent object initialized with the given PooledConnection object. SQLException defaults to null. 
Params:
con – the pooled connection that is the source of the event
Throws:
IllegalArgumentException – if con is null./**
   * <P>Constructs a {@code ConnectionEvent} object initialized with
   * the given {@code PooledConnection} object. {@code SQLException}
   * defaults to {@code null}.
   *
   * @param con the pooled connection that is the source of the event
   * @throws IllegalArgumentException if {@code con} is null.
   */
  public ConnectionEvent(PooledConnection con) {
    super(con);
  }

  
Constructs a ConnectionEvent object initialized with the given PooledConnection object and SQLException object. 
Params:
con – the pooled connection that is the source of the event
ex – the SQLException about to be thrown to the application
Throws:
IllegalArgumentException – if con is null./**
   * <P>Constructs a {@code ConnectionEvent} object initialized with
   * the given {@code PooledConnection} object and
   * {@code SQLException} object.
   *
   * @param con the pooled connection that is the source of the event
   * @param ex the SQLException about to be thrown to the application
   * @throws IllegalArgumentException if {@code con} is null.
   */
  public ConnectionEvent(PooledConnection con, SQLException ex) {
    super(con);
    this.ex = ex;
  }

  
Retrieves the SQLException for this ConnectionEvent object. May be null. 
Returns:
the SQLException about to be thrown or null/**
   * <P>Retrieves the {@code SQLException} for this
   * {@code ConnectionEvent} object. May be {@code null}.
   *
   * @return the SQLException about to be thrown or {@code null}
   */
  public SQLException getSQLException() { return ex; }

  
The SQLException that the driver will throw to the application when an error occurs and the pooled connection is no longer usable. 
@serial
/**
   * The {@code SQLException} that the driver will throw to the
   * application when an error occurs and the pooled connection is no
   * longer usable.
   * @serial
   */
  private SQLException ex = null;

  
Private serial version unique ID to ensure serialization
compatibility.
/**
   * Private serial version unique ID to ensure serialization
   * compatibility.
   */
  static final long serialVersionUID = -4843217645290030002L;

 }