org.apache.drill.exec.ops

Interface FragmentContext.ExecutorState

Enclosing interface:

FragmentContext

public static interface FragmentContext.ExecutorState

Method Summary

Modifier and Type	Method and Description
void	checkContinue() Check if an operation should continue.
void	fail(Throwable t) Inform the executor if a exception occurs and fragment should be failed.
Throwable	getFailureCause() Deprecated.
boolean	isFailed() Deprecated.
boolean	shouldContinue() Tells individual operations whether they should continue.

Method Detail

shouldContinue

boolean shouldContinue()

Tells individual operations whether they should continue. In some cases, an external event (typically cancellation) will mean that the fragment should prematurely exit execution. Long running operations should check this every so often so that Drill is responsive to cancellation operations.

Returns:

False if the action should terminate immediately, true if everything is okay.

checkContinue

void checkContinue()

Check if an operation should continue. In some cases, an external event (typically cancellation) will mean that the fragment should prematurely exit execution. Long running operations should check this every so often so that Drill is responsive to cancellation operations.

Throws QueryCancelledException if the query (fragment) should stop. The fragment executor interprets this as an exception it, itself, requested, and will call the operator's close() method to release resources. Operators should not catch and handle this exception, and should only call this method when the operator holds no transient resources (such as local variables.)

Throws:

QueryCancelledException - if the query (fragment) should stop.

fail

void fail(Throwable t)

Inform the executor if a exception occurs and fragment should be failed.

Parameters:

t - The exception that occurred.

isFailed

@Deprecated
boolean isFailed()

Deprecated.

getFailureCause

@Deprecated
Throwable getFailureCause()

Deprecated.