public class AuroraStaleDnsPlugin extends AbstractConnectionPlugin
Such stale DNS data usually lasts 20-40s, up to a minute. Update time is not predictable and depends on cluster control plane.
This plugin tries to recognize such a wrong connection to a reader when a writer connection is expected, and to mitigate it by reconnecting a proper new writer.
| Constructor and Description |
|---|
AuroraStaleDnsPlugin(PluginService pluginService,
java.util.Properties properties) |
| Modifier and Type | Method and Description |
|---|---|
java.sql.Connection |
connect(java.lang.String driverProtocol,
HostSpec hostSpec,
java.util.Properties props,
boolean isInitialConnection,
JdbcCallable<java.sql.Connection,java.sql.SQLException> connectFunc)
Establishes a connection to the given host using the given driver protocol and properties.
|
<T,E extends java.lang.Exception> |
execute(java.lang.Class<T> resultClass,
java.lang.Class<E> exceptionClass,
java.lang.Object methodInvokeOn,
java.lang.String methodName,
JdbcCallable<T,E> jdbcMethodFunc,
java.lang.Object[] jdbcMethodArgs) |
java.util.Set<java.lang.String> |
getSubscribedMethods() |
void |
initHostProvider(java.lang.String driverProtocol,
java.lang.String initialUrl,
java.util.Properties props,
HostListProviderService hostListProviderService,
JdbcCallable<java.lang.Void,java.sql.SQLException> initHostProviderFunc) |
void |
notifyNodeListChanged(java.util.Map<java.lang.String,java.util.EnumSet<NodeChangeOptions>> changes) |
acceptsStrategy, forceConnect, getHostSpecByStrategy, getHostSpecByStrategy, notifyConnectionChangedpublic AuroraStaleDnsPlugin(PluginService pluginService, java.util.Properties properties)
public java.util.Set<java.lang.String> getSubscribedMethods()
getSubscribedMethods in interface ConnectionPlugingetSubscribedMethods in class AbstractConnectionPluginpublic java.sql.Connection connect(java.lang.String driverProtocol,
HostSpec hostSpec,
java.util.Properties props,
boolean isInitialConnection,
JdbcCallable<java.sql.Connection,java.sql.SQLException> connectFunc)
throws java.sql.SQLException
ConnectionPluginConnectionProvider has been set with
Driver.setCustomConnectionProvider(ConnectionProvider) and
ConnectionProvider.acceptsUrl(String, HostSpec, Properties) returns true for the given
protocol, host, and properties, the connection will be created by the non-default
ConnectionProvider. Otherwise, the connection will be created by the default
ConnectionProvider. The default ConnectionProvider will be DriverConnectionProvider for
connections requested via the DriverManager and
DataSourceConnectionProvider for connections requested via an
AwsWrapperDataSource.connect in interface ConnectionPluginconnect in class AbstractConnectionPlugindriverProtocol - the driver protocol that should be used to establish the connectionhostSpec - the host details for the desired connectionprops - the connection propertiesisInitialConnection - a boolean indicating whether the current Connection is
establishing an initial physical connection to the database or has
already established a physical connection in the pastconnectFunc - the function to call to continue the connect request down the
connect pipelineConnection to the requested hostjava.sql.SQLException - if there was an error establishing a Connection to the requested
hostpublic void initHostProvider(java.lang.String driverProtocol,
java.lang.String initialUrl,
java.util.Properties props,
HostListProviderService hostListProviderService,
JdbcCallable<java.lang.Void,java.sql.SQLException> initHostProviderFunc)
throws java.sql.SQLException
initHostProvider in interface ConnectionPlugininitHostProvider in class AbstractConnectionPluginjava.sql.SQLExceptionpublic <T,E extends java.lang.Exception> T execute(java.lang.Class<T> resultClass,
java.lang.Class<E> exceptionClass,
java.lang.Object methodInvokeOn,
java.lang.String methodName,
JdbcCallable<T,E> jdbcMethodFunc,
java.lang.Object[] jdbcMethodArgs)
throws E extends java.lang.Exception
execute in interface ConnectionPluginexecute in class AbstractConnectionPluginE extends java.lang.Exceptionpublic void notifyNodeListChanged(java.util.Map<java.lang.String,java.util.EnumSet<NodeChangeOptions>> changes)
notifyNodeListChanged in interface ConnectionPluginnotifyNodeListChanged in class AbstractConnectionPlugin