Package org.openjdk.jmc.flightrecorder.rules.jdk.latency

Class BiasedLockingRevocationRule

java.lang.Object

org.openjdk.jmc.flightrecorder.rules.jdk.latency.BiasedLockingRevocationRule

All Implemented Interfaces:

IRule

public final class BiasedLockingRevocationRule
extends java.lang.Object
implements IRule

This rule is making use of the new dedicated biased locking revocation events available in JDK 10/18.3. It will fire whenever a class is excluded from biased lockings, or whenever there have been more than 15 revocations (can be configured) for a particular class.

Field Summary

Fields

Modifier and Type	Field	Description
private static java.util.List<TypedPreference<?>>	CONFIG_ATTRIBUTES
private static TypedPreference<java.lang.String>	FILTERED_CLASSES
static TypedPreference<IQuantity>	MAX_NUMBER_OF_CLASSES_TO_REPORT
static TypedPreference<IQuantity>	WARNING_LIMIT

Constructor Summary

Constructors

Constructor	Description
BiasedLockingRevocationRule()

Method Summary

Modifier and Type	Method	Description
private int	calculateRevocationCountScore(java.util.List<ClassEntry> offendingClasses)
java.util.concurrent.RunnableFuture<Result>	evaluate(IItemCollection items, IPreferenceValueProvider valueProvider)	Gets a future representing the result of the evaluation of this rule.
private java.util.Map<IMCType,ClassEntry>	extractRevocations(IItemCollection revokationEvents, IItemFilter filter, IAttribute<IMCType> classAttribute)
private java.util.Set<IMCType>	filter(java.util.Set<java.lang.String> filteredTypes, java.util.Set<IMCType> types)
private java.util.List<ClassEntry>	filteredMerge(java.util.Set<java.lang.String> filteredTypes, java.util.Set<IMCType> revokedTypes, java.util.Map<IMCType,ClassEntry> offendingClassRevocations, java.util.Map<IMCType,ClassEntry> offendingRevocations)
java.util.Collection<TypedPreference<?>>	getConfigurationAttributes()	Gets information about which attributes may be configured during rule evaluation.
private static java.util.Set<java.lang.String>	getFilteredTypes(java.lang.String preferenceValue)
java.lang.String	getId()
java.lang.String	getName()
private Result	getResult(IItemCollection items, IPreferenceValueProvider valueProvider)
java.lang.String	getTopic()
private static void	putIfNotInFiltered(java.util.Set<java.lang.String> filteredTypes, java.util.Set<IMCType> revokedTypes, java.util.Map<IMCType,ClassEntry> merged, java.util.Map.Entry<IMCType,ClassEntry> entry)

Methods inherited from class java.lang.Object

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

Field Detail

WARNING_LIMIT

public static final TypedPreference<IQuantity> WARNING_LIMIT

MAX_NUMBER_OF_CLASSES_TO_REPORT

public static final TypedPreference<IQuantity> MAX_NUMBER_OF_CLASSES_TO_REPORT

FILTERED_CLASSES

private static final TypedPreference<java.lang.String> FILTERED_CLASSES

CONFIG_ATTRIBUTES

private static final java.util.List<TypedPreference<?>> CONFIG_ATTRIBUTES

Constructor Detail

BiasedLockingRevocationRule

public BiasedLockingRevocationRule()

Method Detail

getResult

private Result getResult(IItemCollection items,
                         IPreferenceValueProvider valueProvider)

calculateRevocationCountScore

private int calculateRevocationCountScore(java.util.List<ClassEntry> offendingClasses)

filteredMerge

private java.util.List<ClassEntry> filteredMerge(java.util.Set<java.lang.String> filteredTypes,
                                                 java.util.Set<IMCType> revokedTypes,
                                                 java.util.Map<IMCType,ClassEntry> offendingClassRevocations,
                                                 java.util.Map<IMCType,ClassEntry> offendingRevocations)

Parameters:

filteredTypes - user filtered types

revokedTypes - the types that were revoked during this recording.

offendingClassRevocations -

offendingRevocations -

Returns:

putIfNotInFiltered

private static void putIfNotInFiltered(java.util.Set<java.lang.String> filteredTypes,
                                       java.util.Set<IMCType> revokedTypes,
                                       java.util.Map<IMCType,ClassEntry> merged,
                                       java.util.Map.Entry<IMCType,ClassEntry> entry)

extractRevocations

private java.util.Map<IMCType,ClassEntry> extractRevocations(IItemCollection revokationEvents,
                                                                   IItemFilter filter,
                                                                   IAttribute<IMCType> classAttribute)

filter

private java.util.Set<IMCType> filter(java.util.Set<java.lang.String> filteredTypes,
                                      java.util.Set<IMCType> types)

getFilteredTypes

private static java.util.Set<java.lang.String> getFilteredTypes(java.lang.String preferenceValue)

evaluate

public java.util.concurrent.RunnableFuture<Result> evaluate(IItemCollection items,
                                                            IPreferenceValueProvider valueProvider)

Description copied from interface: IRule

Gets a future representing the result of the evaluation of this rule. Running the RunnableFuture is the responsibility of the caller of this method, not the implementation.

Specified by:

evaluate in interface IRule

Parameters:

items - items to evaluate

valueProvider - Provider of configuration values used for evaluation. The attributes that will be asked for from the provider should be provided by IRule.getConfigurationAttributes().

Returns:

a RunnableFuture that when run will return the evaluation result

getConfigurationAttributes

public java.util.Collection<TypedPreference<?>> getConfigurationAttributes()

Description copied from interface: IRule

Gets information about which attributes may be configured during rule evaluation.

Specified by:

getConfigurationAttributes in interface IRule

Returns:

a list of configuration attributes

getId

public java.lang.String getId()

Specified by:

getId in interface IRule

Returns:

a unique id for this rule implementation

getName

public java.lang.String getName()

Specified by:

getName in interface IRule

Returns:

a human readable name for this rule

getTopic

public java.lang.String getTopic()

Specified by:

getTopic in interface IRule

Returns:

the topic for this rule, may be null