Examples of javax.sql.ConnectionEventListener

javax.sql.ConnectionEventListener

A ConnectionEventListener is an object that registers to receive events generated by a PooledConnection.
The ConnectionEventListener interface is implemented by a connection pooling component. A connection pooling component will usually be provided by a JDBC driver vendor, or another system software vendor. A ConnectionEventListener is notified by a JDBC driver when an application is finished using its Connection object. This event occurs after the application calls close on its representation of the PooledConnection. A ConnectionEventListener is also notified when a Connection error occurs due to the fact that the PooledConnection is unfit for future use---the server has crashed, for example. The listener is notified, by the JDBC driver, just before the driver throws an SQLException to the application using the PooledConnection.

      ConnectionEvent errorEvent = new ConnectionEvent(this, exception);


      for (Enumeration e = eventListener.elements();
         e.hasMoreElements(); )
      {
        ConnectionEventListener l =
          (ConnectionEventListener)e.nextElement();
        l.connectionErrorOccurred(errorEvent);
      }
    }
  }

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      ConnectionEvent closeEvent = new ConnectionEvent(this);


      for (Enumeration e = eventListener.elements();
         e.hasMoreElements(); )
      {
        ConnectionEventListener l =
          (ConnectionEventListener)e.nextElement();
        l.connectionClosed(closeEvent);
      }
    }
  }

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  /**
   * Tests fix for BUG#7136 ... Statement.getConnection() returning physical
   * connection instead of logical connection.
   */
  public void testBug7136() {
    final ConnectionEventListener conListener = new ConnectionListener();
    PooledConnection pc = null;
    this.closeEventCount = 0;


    try {
      pc = this.cpds.getPooledConnection();

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  /**
   * Test the nb of closeEvents generated when a Connection is reclaimed. No
   * event should be generated in that case.
   */
  public void testConnectionReclaim() {
    final ConnectionEventListener conListener = new ConnectionListener();
    PooledConnection pc = null;
    final int NB_TESTS = 5;


    try {
      pc = this.cpds.getPooledConnection();

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   * 
   * @throws Exception
   *             if the test fails.
   */
  public void testPacketTooLargeException() throws Exception {
    final ConnectionEventListener conListener = new ConnectionListener();
    PooledConnection pc = null;


    pc = this.cpds.getPooledConnection();


    pc.addConnectionEventListener(conListener);

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   * Test the nb of closeEvents generated by a PooledConnection. A
   * JDBC-compliant driver should only generate 1 closeEvent each time
   * connection.close() is called.
   */
  public void testCloseEvent() {
    final ConnectionEventListener conListener = new ConnectionListener();
    PooledConnection pc = null;
    final int NB_TESTS = 5;


    try {
      pc = this.cpds.getPooledConnection();

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    ConnectionEvent connectionevent = new ConnectionEvent(this,
        sqlException);


    while (iterator.hasNext()) {


      ConnectionEventListener connectioneventlistener = iterator.next().getValue();


      if (eventType == CONNECTION_CLOSED_EVENT) {
        connectioneventlistener.connectionClosed(connectionevent);
      } else if (eventType == CONNECTION_ERROR_EVENT) {
        connectioneventlistener
            .connectionErrorOccurred(connectionevent);
      }
    }
  }

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  /**
   * Tests fix for BUG#7136 ... Statement.getConnection() returning physical
   * connection instead of logical connection.
   */
  public void testBug7136() {
    final ConnectionEventListener conListener = new ConnectionListener();
    PooledConnection pc = null;
    this.closeEventCount = 0;


    try {
      pc = this.cpds.getPooledConnection();

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  /**
   * Test the nb of closeEvents generated when a Connection is reclaimed. No
   * event should be generated in that case.
   */
  public void testConnectionReclaim() {
    final ConnectionEventListener conListener = new ConnectionListener();
    PooledConnection pc = null;
    final int NB_TESTS = 5;


    try {
      pc = this.cpds.getPooledConnection();

View Full Code Here

   * 
   * @throws Exception
   *             if the test fails.
   */
  public void testPacketTooLargeException() throws Exception {
    final ConnectionEventListener conListener = new ConnectionListener();
    PooledConnection pc = null;


    pc = this.cpds.getPooledConnection();


    pc.addConnectionEventListener(conListener);

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