com.unboundid.directory.sdk.ds.scripting

Class ScriptedUncachedAttributeCriteria

java.lang.Object

com.unboundid.directory.sdk.ds.scripting.ScriptedUncachedAttributeCriteria

All Implemented Interfaces:

Configurable, Reconfigurable<UncachedAttributeCriteriaConfig>

@Extensible
 @DirectoryServerExtension
 @ThreadSafety(level=INTERFACE_THREADSAFE)
public abstract class ScriptedUncachedAttributeCriteria
extends java.lang.Object
implements Reconfigurable<UncachedAttributeCriteriaConfig>

This class defines an API that must be implemented by scripted extensions which have the ability to determine which attributes should be stored in the uncached-id2entry database of a local DB backend, while the remainder of the entry is stored in the id2entry database. In environments with data sets too large to fit in available memory, and in which entries have a significant amount of space consumed by attributes which are not frequently accessed, this can help the server better use the memory it does have for attributes that are more likely to be accessed.

Configuring Groovy-Scripted Uncached Attribute Criteria

In order to configure a scripted uncached attribute criteria object based on this API and written in the Groovy scripting language, use a command like:

      dsconfig create-uncached-attribute-criteria \
           --criteria-name "{criteria-name}" \
           --type groovy-scripted \
           --set enabled:true \
           --set "script-class:{class-name}" \
           --set "script-argument:{name=value}"
 

where "{handler-name}" is the name to use for the uncached attribute criteria instance, "{class-name}" is the fully-qualified name of the Groovy class written using this API, and "{name=value}" represents name-value pairs for any arguments to provide to the uncached attribute criteria object. If multiple arguments should be provided to the uncached attribute criteria, then the "--set script-argument:{name=value}" option should be provided multiple times.

See Also:

UncachedAttributeCriteria

Constructor Summary

Constructors

Constructor and Description
ScriptedUncachedAttributeCriteria() Creates a new instance of this uncached attribute criteria.

Method Summary

Modifier and Type	Method and Description
ResultCode	applyConfiguration(UncachedAttributeCriteriaConfig config, ArgumentParser parser, java.util.List<java.lang.String> adminActionsRequired, java.util.List<java.lang.String> messages) Attempts to apply the configuration from the provided argument parser to this extension.
void	defineConfigArguments(ArgumentParser parser) Updates the provided argument parser to define any configuration arguments which may be used by this extension.
void	finalizeUncachedAttributeCriteria() Performs any cleanup which may be necessary when this uncached attribute criteria instance is to be taken out of service.
void	initializeUncachedAttributeCriteria(DirectoryServerContext serverContext, UncachedAttributeCriteriaConfig config, ArgumentParser parser) Initializes this uncached attribute criteria.
boolean	isConfigurationAcceptable(UncachedAttributeCriteriaConfig config, ArgumentParser parser, java.util.List<java.lang.String> unacceptableReasons) Indicates whether the configuration represented by the provided argument parser is acceptable for use by this extension.
abstract boolean	shouldBeUncached(Attribute attribute, Entry entry) Indicates whether the provided attribute should be written into the uncached-id2entry database rather than into id2entry.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScriptedUncachedAttributeCriteria

public ScriptedUncachedAttributeCriteria()

Creates a new instance of this uncached attribute criteria. All uncached attribute criteria implementations must include a default constructor, but any initialization should generally be done in the initializeUncachedAttributeCriteria method.

Method Detail

defineConfigArguments

public void defineConfigArguments(ArgumentParser parser)
                           throws ArgumentException

Updates the provided argument parser to define any configuration arguments which may be used by this extension. The argument parser may also be updated to define relationships between arguments (e.g., to specify required, exclusive, or dependent argument sets).

Specified by:

defineConfigArguments in interface Configurable

Parameters:

parser - The argument parser to be updated with the configuration arguments which may be used by this extension.

Throws:

ArgumentException - If a problem is encountered while updating the provided argument parser.

initializeUncachedAttributeCriteria

public void initializeUncachedAttributeCriteria(DirectoryServerContext serverContext,
                                                UncachedAttributeCriteriaConfig config,
                                                ArgumentParser parser)
                                         throws LDAPException

Initializes this uncached attribute criteria.

Parameters:

serverContext - A handle to the server context for the server in which this extension is running.

config - The general configuration for this uncached attribute criteria.

parser - The argument parser which has been initialized from the configuration for this uncached attribute criteria.

Throws:

LDAPException - If a problem occurs while initializing this uncached attribute criteria.

isConfigurationAcceptable

public boolean isConfigurationAcceptable(UncachedAttributeCriteriaConfig config,
                                         ArgumentParser parser,
                                         java.util.List<java.lang.String> unacceptableReasons)

Indicates whether the configuration represented by the provided argument parser is acceptable for use by this extension. The parser will have been used to parse any configuration available for this extension, and any automatic validation will have been performed. This method may be used to perform any more complex validation which cannot be performed automatically by the argument parser.

Specified by:

isConfigurationAcceptable in interface Reconfigurable<UncachedAttributeCriteriaConfig>

Parameters:

config - The general configuration for this extension.

parser - The argument parser that has been used to parse the proposed configuration for this extension.

unacceptableReasons - A list to which messages may be added to provide additional information about why the provided configuration is not acceptable.

Returns:

true if the configuration in the provided argument parser appears to be acceptable, or false if not.

applyConfiguration

public ResultCode applyConfiguration(UncachedAttributeCriteriaConfig config,
                                     ArgumentParser parser,
                                     java.util.List<java.lang.String> adminActionsRequired,
                                     java.util.List<java.lang.String> messages)

Attempts to apply the configuration from the provided argument parser to this extension.

Specified by:

applyConfiguration in interface Reconfigurable<UncachedAttributeCriteriaConfig>

Parameters:

config - The general configuration for this extension.

parser - The argument parser that has been used to parse the new configuration for this extension.

adminActionsRequired - A list to which messages may be added to provide additional information about any additional administrative actions that may be required to apply some of the configuration changes.

messages - A list to which messages may be added to provide additional information about the processing performed by this method.

Returns:

A result code providing information about the result of applying the configuration change. A result of SUCCESS should be used to indicate that all processing completed successfully. Any other result will indicate that a problem occurred during processing.

finalizeUncachedAttributeCriteria

public void finalizeUncachedAttributeCriteria()

Performs any cleanup which may be necessary when this uncached attribute criteria instance is to be taken out of service.

shouldBeUncached

public abstract boolean shouldBeUncached(Attribute attribute,
                                         Entry entry)

Indicates whether the provided attribute should be written into the uncached-id2entry database rather than into id2entry.

Parameters:

attribute - A read-only representation of the attribute for which to make the determination.

entry - A read-only representation of the full entry to be encoded.

Returns:

true if the attribute should be written into the uncached-id2entry database, or false if it should be written into the id2entry database.