org.elasticsearch.common.settings

Class AbstractScopedSettings

java.lang.Object

org.elasticsearch.common.component.AbstractComponent

org.elasticsearch.common.settings.AbstractScopedSettings

Direct Known Subclasses:

ClusterSettings, IndexScopedSettings

public abstract class AbstractScopedSettings
extends AbstractComponent

A basic setting service that can be used for per-index and per-cluster settings. This service offers transactional application of updates settings.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	AbstractScopedSettings.SettingUpdater<T> Transactional interface to update settings.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	ARCHIVED_SETTINGS_PREFIX

Fields inherited from class org.elasticsearch.common.component.AbstractComponent

deprecationLogger, logger, settings

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractScopedSettings(Settings settings, java.util.Set<Setting<?>> settingsSet, Setting.Property scope)
protected	AbstractScopedSettings(Settings nodeSettings, Settings scopeSettings, AbstractScopedSettings other)

Method Summary

Modifier and Type	Method and Description
<T> void	addAffixUpdateConsumer(Setting.AffixSetting<T> setting, java.util.function.BiConsumer<java.lang.String,T> consumer, java.util.function.BiConsumer<java.lang.String,T> validator) Adds a settings consumer for affix settings.
<A,B> void	addSettingsUpdateConsumer(Setting<A> a, Setting<B> b, java.util.function.BiConsumer<A,B> consumer) Adds a settings consumer that accepts the values for two settings.
<T> void	addSettingsUpdateConsumer(Setting<T> setting, java.util.function.Consumer<T> consumer) Adds a settings consumer.
<T> void	addSettingsUpdateConsumer(Setting<T> setting, java.util.function.Consumer<T> consumer, java.util.function.Consumer<T> validator) Adds a settings consumer with a predicate that is only evaluated at update time.
Settings	applySettings(Settings newSettings) Applies the given settings to all the settings consumers or to none of them.
Settings	archiveUnknownOrInvalidSettings(Settings settings, java.util.function.Consumer<java.util.Map.Entry<java.lang.String,java.lang.String>> unknownConsumer, java.util.function.BiConsumer<java.util.Map.Entry<java.lang.String,java.lang.String>,java.lang.IllegalArgumentException> invalidConsumer) Archives invalid or unknown settings.
Settings	diff(Settings source, Settings defaultSettings) Returns a settings object that contains all settings that are not already set in the given source.
<T> T	get(Setting<T> setting) Returns the value for the given setting.
Setting<?>	get(java.lang.String key) Returns the Setting for the given key or null if the setting can not be found.
Setting.Property	getScope()
boolean	isDynamicSetting(java.lang.String key) Returns true if the setting for the given key is dynamically updateable.
boolean	isFinalSetting(java.lang.String key) Returns true if the setting for the given key is final.
protected boolean	isPrivateSetting(java.lang.String key) Returns true iff the setting is a private setting ie.
static boolean	isValidKey(java.lang.String key) Returns true iff the given key is a valid settings key otherwise false
boolean	updateDynamicSettings(Settings toApply, Settings.Builder target, Settings.Builder updates, java.lang.String type) Updates a target settings builder with new, updated or deleted settings from a given settings builder.
boolean	updateSettings(Settings toApply, Settings.Builder target, Settings.Builder updates, java.lang.String type) Updates a target settings builder with new, updated or deleted settings from a given settings builder.
void	validate(Settings.Builder settingsBuilder) Validates that all settings in the builder are registered and valid
void	validate(Settings settings) * Validates that all given settings are registered and valid
void	validate(java.lang.String key, Settings settings) Validates that the setting is valid
protected void	validateSettingKey(Setting setting)
Settings	validateUpdate(Settings settings) Validates the given settings by running it through all update listeners without applying it.

Methods inherited from class org.elasticsearch.common.component.AbstractComponent

logDeprecatedSetting, logRemovedSetting, nodeName

Methods inherited from class java.lang.Object

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

Field Detail

ARCHIVED_SETTINGS_PREFIX

public static final java.lang.String ARCHIVED_SETTINGS_PREFIX

See Also:

Constant Field Values

Constructor Detail

AbstractScopedSettings

protected AbstractScopedSettings(Settings settings,
                                 java.util.Set<Setting<?>> settingsSet,
                                 Setting.Property scope)

AbstractScopedSettings

protected AbstractScopedSettings(Settings nodeSettings,
                                 Settings scopeSettings,
                                 AbstractScopedSettings other)

Method Detail

validateSettingKey

protected void validateSettingKey(Setting setting)

isValidKey

public static boolean isValidKey(java.lang.String key)

Returns true iff the given key is a valid settings key otherwise false

getScope

public Setting.Property getScope()

validateUpdate

public Settings validateUpdate(Settings settings)

Validates the given settings by running it through all update listeners without applying it. This method will not change any settings but will fail if any of the settings can't be applied.

applySettings

public Settings applySettings(Settings newSettings)

Applies the given settings to all the settings consumers or to none of them. The settings will be merged with the node settings before they are applied while given settings override existing node settings.

Parameters:

newSettings - the settings to apply

Returns:

the unmerged applied settings

addSettingsUpdateConsumer

public <T> void addSettingsUpdateConsumer(Setting<T> setting,
                                          java.util.function.Consumer<T> consumer,
                                          java.util.function.Consumer<T> validator)

Adds a settings consumer with a predicate that is only evaluated at update time.

Note: Only settings registered in SettingsModule can be changed dynamically.

Parameters:

validator - an additional validator that is only applied to updates of this setting. This is useful to add additional validation to settings at runtime compared to at startup time.

addAffixUpdateConsumer

public <T> void addAffixUpdateConsumer(Setting.AffixSetting<T> setting,
                                       java.util.function.BiConsumer<java.lang.String,T> consumer,
                                       java.util.function.BiConsumer<java.lang.String,T> validator)

Adds a settings consumer for affix settings. Affix settings have a namespace associated to it that needs to be available to the consumer in order to be processed correctly.

addSettingsUpdateConsumer

public <A,B> void addSettingsUpdateConsumer(Setting<A> a,
                                            Setting<B> b,
                                            java.util.function.BiConsumer<A,B> consumer)

Adds a settings consumer that accepts the values for two settings. The consumer if only notified if one or both settings change.

Note: Only settings registered in SettingsModule can be changed dynamically.

This method registers a compound updater that is useful if two settings are depending on each other. The consumer is always provided with both values even if only one of the two changes.

addSettingsUpdateConsumer

public <T> void addSettingsUpdateConsumer(Setting<T> setting,
                                          java.util.function.Consumer<T> consumer)

Adds a settings consumer.

Note: Only settings registered in ClusterModule can be changed dynamically.

validate

public final void validate(Settings.Builder settingsBuilder)

Validates that all settings in the builder are registered and valid

validate

public final void validate(Settings settings)

* Validates that all given settings are registered and valid

validate

public final void validate(java.lang.String key,
                           Settings settings)

Validates that the setting is valid

get

public Setting<?> get(java.lang.String key)

Returns the Setting for the given key or null if the setting can not be found.

isDynamicSetting

public boolean isDynamicSetting(java.lang.String key)

Returns true if the setting for the given key is dynamically updateable. Otherwise false.

isFinalSetting

public boolean isFinalSetting(java.lang.String key)

Returns true if the setting for the given key is final. Otherwise false.

diff

public Settings diff(Settings source,
                     Settings defaultSettings)

Returns a settings object that contains all settings that are not already set in the given source. The diff contains either the default value for each setting or the settings value in the given default settings.

get

public <T> T get(Setting<T> setting)

Returns the value for the given setting.

updateDynamicSettings

public boolean updateDynamicSettings(Settings toApply,
                                     Settings.Builder target,
                                     Settings.Builder updates,
                                     java.lang.String type)

Updates a target settings builder with new, updated or deleted settings from a given settings builder.

Note: This method will only allow updates to dynamic settings. if a non-dynamic setting is updated an IllegalArgumentException is thrown instead.

Parameters:

toApply - the new settings to apply

target - the target settings builder that the updates are applied to. All keys that have explicit null value in toApply will be removed from this builder

updates - a settings builder that holds all updates applied to target

type - a free text string to allow better exceptions messages

Returns:

true if the target has changed otherwise false

updateSettings

public boolean updateSettings(Settings toApply,
                              Settings.Builder target,
                              Settings.Builder updates,
                              java.lang.String type)

Updates a target settings builder with new, updated or deleted settings from a given settings builder.

Parameters:

toApply - the new settings to apply

target - the target settings builder that the updates are applied to. All keys that have explicit null value in toApply will be removed from this builder

updates - a settings builder that holds all updates applied to target

type - a free text string to allow better exceptions messages

Returns:

true if the target has changed otherwise false

archiveUnknownOrInvalidSettings

public Settings archiveUnknownOrInvalidSettings(Settings settings,
                                                java.util.function.Consumer<java.util.Map.Entry<java.lang.String,java.lang.String>> unknownConsumer,
                                                java.util.function.BiConsumer<java.util.Map.Entry<java.lang.String,java.lang.String>,java.lang.IllegalArgumentException> invalidConsumer)

Archives invalid or unknown settings. Any setting that is not recognized or fails validation will be archived. This means the setting is prefixed with "archived." and remains in the settings object. This can be used to detect invalid settings via APIs.

Parameters:

settings - the Settings instance to scan for unknown or invalid settings

unknownConsumer - callback on unknown settings (consumer receives unknown key and its associated value)

invalidConsumer - callback on invalid settings (consumer receives invalid key, its associated value and an exception)

Returns:

a Settings instance with the unknown or invalid settings archived

isPrivateSetting

protected boolean isPrivateSetting(java.lang.String key)

Returns true iff the setting is a private setting ie. it should be treated as valid even though it has no internal representation. Otherwise false