com.mysql.cj.jdbc.ha

Class StandardLoadBalanceExceptionChecker

java.lang.Object

com.mysql.cj.jdbc.ha.StandardLoadBalanceExceptionChecker

All Implemented Interfaces:

LoadBalanceExceptionChecker

Direct Known Subclasses:

NdbLoadBalanceExceptionChecker

public class StandardLoadBalanceExceptionChecker
extends java.lang.Object
implements LoadBalanceExceptionChecker

Constructor Summary

Constructors

Constructor and Description
StandardLoadBalanceExceptionChecker()

Method Summary

Modifier and Type	Method and Description
void	destroy() Called by the driver when this extension should release any resources it is holding and cleanup internally before the connection is closed.
void	init(java.util.Properties props) 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().
boolean	shouldExceptionTriggerFailover(java.lang.Throwable ex) Invoked to determine whether or a given SQLException should trigger a failover in a load-balanced deployment.

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardLoadBalanceExceptionChecker

public StandardLoadBalanceExceptionChecker()

Method Detail

shouldExceptionTriggerFailover

public boolean shouldExceptionTriggerFailover(java.lang.Throwable 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 - exception

Returns:

true if the exception should trigger failover.

destroy

public void destroy()

Description copied from interface: LoadBalanceExceptionChecker

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 LoadBalanceExceptionChecker

init

public void init(java.util.Properties props)

Description copied from interface: LoadBalanceExceptionChecker

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 LoadBalanceExceptionChecker

Parameters:

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.