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

Class AbortTxnsFunction

java.lang.Object

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

All Implemented Interfaces:

TransactionalFunction<Integer>

public class AbortTxnsFunction
extends Object
implements TransactionalFunction<Integer>

Constructor Summary

Constructors

Constructor and Description
AbortTxnsFunction(List<Long> txnids, boolean checkHeartbeat, boolean skipCount, boolean isReplReplayed, TxnErrorMsg txnErrorMsg) TODO: expose this as an operation to client.

Method Summary

Modifier and Type	Method and Description
Integer	execute(MultiDataSourceJdbcResource jdbcResource) Implementations typically should execute transsactional database calls inside.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbortTxnsFunction

public AbortTxnsFunction(List<Long> txnids,
                         boolean checkHeartbeat,
                         boolean skipCount,
                         boolean isReplReplayed,
                         TxnErrorMsg txnErrorMsg)

TODO: expose this as an operation to client. Useful for streaming API to abort all remaining transactions in a batch on IOExceptions. Caller must rollback the transaction if not all transactions were aborted since this will not attempt to delete associated locks in this case.

Parameters:

txnids - list of transactions to abort

checkHeartbeat - value used by org.apache.hadoop.hive.metastore.txn.TxnHandler#performTimeOuts() to ensure this doesn't Abort txn which were heartbeated after #performTimeOuts() select and this operation.

skipCount - If true, the method always returns 0, otherwise returns the number of actually aborted txns

Method Detail

execute

public Integer execute(MultiDataSourceJdbcResource jdbcResource)
                throws MetaException

Description copied from interface: TransactionalFunction

Implementations typically should execute transsactional database calls inside.

Specified by:

execute in interface TransactionalFunction<Integer>

Parameters:

jdbcResource - A MultiDataSourceJdbcResource instance responsible for providing all the necessary resources to be able to perform transactional database calls.

Returns:

0 if skipCount is true, the number of aborted transactions otherwise

Throws:

MetaException - Thrown in case of application error within the function