Package org.eclipse.rdf4j.model.impl

Class AbstractMemoryOverflowModel<T extends AbstractModel>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<Statement>

org.eclipse.rdf4j.model.impl.AbstractModel

org.eclipse.rdf4j.model.impl.AbstractMemoryOverflowModel<T>

All Implemented Interfaces:

Serializable, Iterable<Statement>, Collection<Statement>, Set<Statement>, Model, NamespaceAware

@InternalUseOnly
public abstract class AbstractMemoryOverflowModel<T extends AbstractModel>
extends AbstractModel

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	BATCH_SIZE	The default batch size is 1024.
protected T	disk
static int	MEMORY_THRESHOLD_HIGH	ms GC activity over the past second that triggers overflow to disk
static int	MEMORY_THRESHOLD_LOW	ms GC activity over the past second that skips overflow to disk in anticipation of GC freeing up memory
static int	MEMORY_THRESHOLD_MEDIUM	ms GC activity over the past second that disables overflow to disk
static int	MIN_AVAILABLE_MEM_BEFORE_OVERFLOWING	The minimum amount of free memory before overflowing to disk.

Fields inherited from class org.eclipse.rdf4j.model.impl.AbstractModel

NULL_CONTEXT

Constructor Summary

Constructors

Constructor	Description
AbstractMemoryOverflowModel()
AbstractMemoryOverflowModel(Set<Namespace> namespaces)

Method Summary

Modifier and Type	Method	Description
boolean	add(Resource subj, IRI pred, Value obj, Resource... contexts)
boolean	add(Statement st)
boolean	addAll(Collection<? extends Statement> c)
boolean	clear(Resource... contexts)
boolean	contains(Resource subj, IRI pred, Value obj, Resource... contexts)
Model	filter(Resource subj, IRI pred, Value obj, Resource... contexts)
Optional<Namespace>	getNamespace(String prefix)
Set<Namespace>	getNamespaces()
Iterator<Statement>	iterator()
protected abstract void	overflowToDiskInner(Model memory)
boolean	remove(Resource subj, IRI pred, Value obj, Resource... contexts)
Optional<Namespace>	removeNamespace(String prefix)
void	removeTermIteration(Iterator<Statement> iter, Resource subj, IRI pred, Value obj, Resource... contexts)	Called by aggregate sets when a term has been removed from a term iterator.
Namespace	setNamespace(String prefix, String name)
void	setNamespace(Namespace namespace)
int	size()

Methods inherited from class org.eclipse.rdf4j.model.impl.AbstractModel

clear, closeIterator, contains, containsAll, contexts, isEmpty, objects, predicates, remove, removeAll, retainAll, subjects, toArray, toArray, unmodifiable

Methods inherited from class java.util.AbstractSet

equals, hashCode

Methods inherited from class java.util.AbstractCollection

toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface org.eclipse.rdf4j.model.Model

getStatements

Methods inherited from interface java.util.Set

equals, hashCode, spliterator

Field Detail

BATCH_SIZE

public static int BATCH_SIZE

The default batch size is 1024. This is the number of statements that will be written to disk at a time.

MEMORY_THRESHOLD_HIGH

public static int MEMORY_THRESHOLD_HIGH

ms GC activity over the past second that triggers overflow to disk

MEMORY_THRESHOLD_MEDIUM

public static int MEMORY_THRESHOLD_MEDIUM

ms GC activity over the past second that disables overflow to disk

MEMORY_THRESHOLD_LOW

public static int MEMORY_THRESHOLD_LOW

ms GC activity over the past second that skips overflow to disk in anticipation of GC freeing up memory

MIN_AVAILABLE_MEM_BEFORE_OVERFLOWING

public static int MIN_AVAILABLE_MEM_BEFORE_OVERFLOWING

The minimum amount of free memory before overflowing to disk. Defaults to 32 MB for heaps smaller than 1 GB and 128 MB for heaps larger than 1 GB.

disk

protected transient volatile T extends AbstractModel disk

Constructor Detail

AbstractMemoryOverflowModel

public AbstractMemoryOverflowModel()

AbstractMemoryOverflowModel

public AbstractMemoryOverflowModel(Set<Namespace> namespaces)

Method Detail

getNamespaces

public Set<Namespace> getNamespaces()

getNamespace

public Optional<Namespace> getNamespace(String prefix)

setNamespace

public Namespace setNamespace(String prefix,
                              String name)

setNamespace

public void setNamespace(Namespace namespace)

removeNamespace

public Optional<Namespace> removeNamespace(String prefix)

contains

public boolean contains(Resource subj,
                        IRI pred,
                        Value obj,
                        Resource... contexts)

add

public boolean add(Resource subj,
                   IRI pred,
                   Value obj,
                   Resource... contexts)

add

public boolean add(Statement st)

Specified by:

add in interface Collection<T extends AbstractModel>

Specified by:

add in interface Set<T extends AbstractModel>

Overrides:

add in class AbstractModel

addAll

public boolean addAll(Collection<? extends Statement> c)

Specified by:

addAll in interface Collection<T extends AbstractModel>

Specified by:

addAll in interface Set<T extends AbstractModel>

Overrides:

addAll in class AbstractModel

remove

public boolean remove(Resource subj,
                      IRI pred,
                      Value obj,
                      Resource... contexts)

size

public int size()

Specified by:

size in interface Collection<T extends AbstractModel>

Specified by:

size in interface Set<T extends AbstractModel>

Specified by:

size in class AbstractCollection<Statement>

iterator

public Iterator<Statement> iterator()

Specified by:

iterator in interface Collection<T extends AbstractModel>

Specified by:

iterator in interface Iterable<T extends AbstractModel>

Specified by:

iterator in interface Set<T extends AbstractModel>

Specified by:

iterator in class AbstractCollection<Statement>

clear

public boolean clear(Resource... contexts)

Specified by:

clear in interface Model

Overrides:

clear in class AbstractModel

filter

public Model filter(Resource subj,
                    IRI pred,
                    Value obj,
                    Resource... contexts)

removeTermIteration

public void removeTermIteration(Iterator<Statement> iter,
                                Resource subj,
                                IRI pred,
                                Value obj,
                                Resource... contexts)

Description copied from class: AbstractModel

Called by aggregate sets when a term has been removed from a term iterator. Exactly one of the last four terms will be non-empty.

Specified by:

removeTermIteration in class AbstractModel

Parameters:

iter - The iterator used to navigate the live set (never null)

subj - the subject term to be removed or null

pred - the predicate term to be removed or null

obj - the object term to be removed or null

contexts - an array of one context term to be removed or an empty array

overflowToDiskInner

protected abstract void overflowToDiskInner(Model memory)