Package org.apache.drill.exec.server.options

Class FallbackOptionManager

java.lang.Object

org.apache.drill.exec.server.options.BaseOptionManager

org.apache.drill.exec.server.options.FallbackOptionManager

All Implemented Interfaces:

Iterable<OptionValue>, OptionManager, OptionSet

Direct Known Subclasses:

InMemoryOptionManager

public abstract class FallbackOptionManager
extends BaseOptionManager

An OptionManager which allows for falling back onto another OptionManager when retrieving options.

FragmentOptionManager and SessionOptionManager use SystemOptionManager as the fall back manager. QueryOptionManager uses SessionOptionManager as the fall back manager.

Field Summary

Fields

Modifier and Type	Field	Description
protected final OptionManager	fallback

Constructor Summary

Constructors

Constructor	Description
FallbackOptionManager(OptionManager fallback)

Method Summary

Modifier and Type	Method	Description
OptionValue	getOption(String name)	Gets the option value for the given option name.
OptionDefinition	getOptionDefinition(String name)	Get the option definition corresponding to the given option name.
OptionList	getOptionList()	Gets the list of options managed this manager.
Iterator<OptionValue>	iterator()

Methods inherited from class org.apache.drill.exec.server.options.BaseOptionManager

getBoolean, getDouble, getInt, getInternalOptionList, getLong, getOption, getOption, getOption, getOption, getPublicOptionList, getScope, getString, setLocalOption, setLocalOption, setLocalOption, setLocalOption, setLocalOption, setLocalOption, setLocalOptionHelper

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface org.apache.drill.exec.server.options.OptionManager

deleteAllLocalOptions, deleteLocalOption

Methods inherited from interface org.apache.drill.exec.server.options.OptionSet

getDefault

Field Details

fallback

protected final OptionManager fallback

Constructor Details

FallbackOptionManager

public FallbackOptionManager(OptionManager fallback)

Method Details

iterator

public Iterator<OptionValue> iterator()

getOption

public OptionValue getOption(String name)

Description copied from interface: OptionSet

Gets the option value for the given option name. This interface also provides convenient methods to get typed option values: OptionSet.getOption(TypeValidators.BooleanValidator validator), OptionSet.getOption(TypeValidators.DoubleValidator validator), OptionSet.getOption(TypeValidators.LongValidator validator), and OptionSet.getOption(TypeValidators.StringValidator validator).

Parameters:

name - option name

Returns:

the option value, null if the option does not exist

getOptionDefinition

public OptionDefinition getOptionDefinition(String name)

Description copied from interface: OptionManager

Get the option definition corresponding to the given option name.

Parameters:

name - The name of the option to retrieve a validator for.

Returns:

The option validator corresponding to the given option name.

getOptionList

public OptionList getOptionList()

Description copied from interface: OptionManager

Gets the list of options managed this manager.

Returns:

the list of options