Class StandardLoadBalanceExceptionChecker

java.lang.Object
com.mysql.jdbc.StandardLoadBalanceExceptionChecker
All Implemented Interfaces:
Extension, LoadBalanceExceptionChecker
Direct Known Subclasses:
NdbLoadBalanceExceptionChecker
public class StandardLoadBalanceExceptionChecker extends Object implements LoadBalanceExceptionChecker

  • Constructor Details

    • StandardLoadBalanceExceptionChecker

      public StandardLoadBalanceExceptionChecker()

  • Method Details

    • shouldExceptionTriggerFailover

      public boolean shouldExceptionTriggerFailover(SQLException ex)
      Description copied from interface: LoadBalanceExceptionChecker
      Invoked to determine whether or a given SQLException should trigger a failover in a load-balanced deployment. The driver will not pass in a Connection instance when calling init(), but it will pass in the Properties, otherwise it acts like a normal Extension. One instance of a handler *per* JDBC connection instance will be created. If you need singleton-like behavior, you're on your own to provide it.
      Specified by:
      shouldExceptionTriggerFailover in interface LoadBalanceExceptionChecker
      Parameters:
      ex -
      Returns:
      true if the exception should trigger failover.

    • destroy

      public void destroy()
      Description copied from interface: Extension
      Called by the driver when this extension should release any resources it is holding and cleanup internally before the connection is closed.
      Specified by:
      destroy in interface Extension

    • init

      public void init(Connection conn, Properties props) throws SQLException
      Description copied from interface: Extension
      Called once per connection that wants to use the extension The properties are the same ones passed in in the URL or arguments to Driver.connect() or DriverManager.getConnection().
      Specified by:
      init in interface Extension
      Parameters:
      conn - the connection for which this extension is being created
      props - configuration values as passed to the connection. Note that in order to support javax.sql.DataSources, configuration properties specific to an interceptor must be passed via setURL() on the DataSource. Extension properties are not exposed via accessor/mutator methods on DataSources.
      Throws:
      SQLException - should be thrown if the the Extension can not initialize itself.