org.apache.hadoop.hive.metastore.txn.jdbc

Interface ConditionalCommand

All Known Implementing Classes:

AddWriteIdsToMinHistoryCommand, RemoveTxnsFromMinHistoryLevelCommand, RemoveWriteIdsFromMinHistoryCommand

public interface ConditionalCommand

ParameterizedCommand. ParameterizedBatchCommand, and InClauseBatchCommand implementations can also implement this interface, marking that the execution is conditial, and the command wants to get notified about execution errors. Can be used to implement commands depending on some feature flag(s).

Method Summary

Modifier and Type	Method and Description
void	onError(DatabaseProduct databaseProduct, Exception e) Called in case of execution error in order to notify this command about the failure
boolean	shouldBeUsed(DatabaseProduct databaseProduct) Indicates if the command should be executed or not

Method Detail

shouldBeUsed

boolean shouldBeUsed(DatabaseProduct databaseProduct)

Indicates if the command should be executed or not

Parameters:

databaseProduct -

Returns:

Returns true if the command can be executed, false otherwise.

onError

void onError(DatabaseProduct databaseProduct,
             Exception e)

Called in case of execution error in order to notify this command about the failure

Parameters:

databaseProduct -

e - The caught Exception