Package se.liu.ida.hefquin.engine.queryplan.executable.impl.ops

Class UnaryExecutableOpBase

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.BaseForExecOps

se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.UnaryExecutableOpBase

All Implemented Interfaces:

StatsProvider, ExecutableOperator, UnaryExecutableOp

Direct Known Subclasses:

BaseForExecOpBindJoin, BaseForExecOpIndexNestedLoopsJoin, ExecOpParallelMultiwayLeftJoin, UnaryExecutableOpBaseWithIterator

public abstract class UnaryExecutableOpBase
extends BaseForExecOps
implements UnaryExecutableOp

Top-level base class for all implementations of UnaryExecutableOp. This base class handles the collection of statistics about both the input and the processing times per input block. To this end, it implements the major methods of the UnaryExecutableOp interface, where the actual functionality to be implemented for these methods needs to be provided by implementing two abstract functions in each sub-class of this base class. These two functions are:

• _process(IntermediateResultBlock, IntermediateResultElementSink, ExecutionContext) and
• _concludeExecution(IntermediateResultElementSink, ExecutionContext).

Field Summary

Fields

Modifier and Type	Field	Description
protected long	timeAtCurrentProcStart

Fields inherited from class se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.BaseForExecOps

collectExceptions

Constructor Summary

Constructors

Constructor	Description
UnaryExecutableOpBase(boolean collectExceptions)

Method Summary

Modifier and Type	Method	Description
protected abstract void	_concludeExecution(IntermediateResultElementSink sink, ExecutionContext execCxt)	Implementations of this function need to conclude the execution of this operator and send the remaining result elements (if any) to the given sink.
protected abstract void	_process(IntermediateResultBlock input, IntermediateResultElementSink sink, ExecutionContext execCxt)	Implementations of this function need to process the given input block and send the produced result elements (if any) to the given sink.
final void	concludeExecution(IntermediateResultElementSink sink, ExecutionContext execCxt)	Concludes the execution of this operator and sends the remaining result elements (if any) to the given sink.
protected ExecutableOperatorStatsImpl	createStats()
final ExecutableOperatorStats	getStats()
final void	process(IntermediateResultBlock input, IntermediateResultElementSink sink, ExecutionContext execCxt)	Processes the given input and sends the produced result elements (if any) to the given sink.
void	resetStats()

Methods inherited from class se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.BaseForExecOps

getExceptionsCaughtDuringExecution, recordExceptionCaughtDuringExecution

Methods inherited from class java.lang.Object

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

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.executable.ExecutableOperator

getExceptionsCaughtDuringExecution

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.executable.UnaryExecutableOp

preferredInputBlockSize

Field Details

timeAtCurrentProcStart

protected long timeAtCurrentProcStart

Constructor Details

UnaryExecutableOpBase

public UnaryExecutableOpBase(boolean collectExceptions)

Method Details

process

public final void process(IntermediateResultBlock input,
 IntermediateResultElementSink sink,
 ExecutionContext execCxt)
                   throws ExecOpExecutionException

Description copied from interface: UnaryExecutableOp

Processes the given input and sends the produced result elements (if any) to the given sink.

Specified by:

process in interface UnaryExecutableOp

Throws:

ExecOpExecutionException

concludeExecution

public final void concludeExecution(IntermediateResultElementSink sink,
 ExecutionContext execCxt)
                             throws ExecOpExecutionException

Description copied from interface: UnaryExecutableOp

Concludes the execution of this operator and sends the remaining result elements (if any) to the given sink. This method will be called only once, after the sub-plan that produces the input for this operator has finished producing its result.

Specified by:

concludeExecution in interface UnaryExecutableOp

Throws:

ExecOpExecutionException

_process

protected abstract void _process(IntermediateResultBlock input,
 IntermediateResultElementSink sink,
 ExecutionContext execCxt)
                          throws ExecOpExecutionException

Implementations of this function need to process the given input block and send the produced result elements (if any) to the given sink. If an exception occurs while processing the input block, this exception needs to either be collected or be thrown, depending on whether BaseForExecOps.collectExceptions is set to true.

Throws:

ExecOpExecutionException

_concludeExecution

protected abstract void _concludeExecution(IntermediateResultElementSink sink,
 ExecutionContext execCxt)
                                    throws ExecOpExecutionException

Implementations of this function need to conclude the execution of this operator and send the remaining result elements (if any) to the given sink. If an exception occurs during this process, then this exception needs to either be collected or be thrown, depending on whether BaseForExecOps.collectExceptions is set to true.

Throws:

ExecOpExecutionException

resetStats

public void resetStats()

Specified by:

resetStats in interface StatsProvider

getStats

public final ExecutableOperatorStats getStats()

Specified by:

getStats in interface ExecutableOperator

Specified by:

getStats in interface StatsProvider

createStats

protected ExecutableOperatorStatsImpl createStats()