Uses of Interface
com.hazelcast.jet.Traverser

Packages that use Traverser

Package	Description
com.hazelcast.jet	Hazelcast Jet is a distributed computation engine running on top of Hazelcast IMDG technology.
com.hazelcast.jet.aggregate	Contains AggregateOperation and its several variants, as well as a builder object for the aggregate operations.
com.hazelcast.jet.core	Jet's Core API.
com.hazelcast.jet.core.processor	Contains static utility classes with factories of Jet processors.
com.hazelcast.jet.pipeline	The Pipeline API is Jet's high-level API to build and execute distributed computation jobs.

Uses of Traverser in com.hazelcast.jet

Methods in com.hazelcast.jet that return Traverser

Modifier and Type	Method and Description
default Traverser<T>	Traverser.append(T item) Returns a traverser that will return all the items of this traverser, plus an additional item once this one returns null.
default Traverser<T>	Traverser.dropWhile(Predicate<? super T> predicate) Returns a traverser that will emit a suffix of the original traverser, starting from the item for which the predicate fails (inclusive).
static <T> Traverser<T>	Traversers.empty() Returns a traverser that always returns null.
default Traverser<T>	Traverser.filter(Predicate<? super T> filterFn) Returns a traverser that will emit the same items as this traverser, but only those that pass the given predicate.
default <R> Traverser<R>	Traverser.flatMap(Function<? super T,? extends Traverser<R>> flatMapFn) Returns a traverser that will apply the given mapping function to each item retrieved from this traverser and emit all the items from the resulting traversers, which must be null-terminated.
static <T> Traverser<T>	Traversers.lazy(Supplier<Traverser<T>> supplierOfTraverser) Flattens a supplier of traverser into a lazy-initialized traverser.
default <R> Traverser<R>	Traverser.map(Function<? super T,? extends R> mapFn) Returns a traverser that will emit the results of applying mapFn to this traverser's items.
default Traverser<T>	Traverser.onFirstNull(Runnable action) Returns a traverser that will emit the same items as this traverser and additionally run the supplied action the first time this traverser returns null.
default Traverser<T>	Traverser.peek(Consumer<? super T> action) Returns a traverser that will emit the same items as this traverser, additionally passing each (non-null) item to the supplied consumer.
default Traverser<T>	Traverser.prepend(T item) Returns a traverser which prepends an additional item in front of all the items of this traverser.
static <T> Traverser<T>	Traversers.singleton(T item) Returns a traverser over the given single item.
default Traverser<T>	Traverser.takeWhile(Predicate<? super T> predicate) Returns a traverser that will emit a prefix of the original traverser, up to the item for which the predicate fails (exclusive).
static <T> Traverser<T>	Traversers.traverseArray(T[] array) Returns a traverser over the given array.
static <T> Traverser<T>	Traversers.traverseEnumeration(Enumeration<T> enumeration) Returns an adapter from Enumeration to Traverser.
static <T> Traverser<T>	Traversers.traverseItems(T... items) Returns a traverser over the supplied arguments (or item array).
static <T> Traverser<T>	Traversers.traverseIterable(Iterable<? extends T> iterable) Returns a traverser over the given iterable.
static <T> Traverser<T>	Traversers.traverseIterator(Iterator<? extends T> iterator) Returns an adapter from Iterator to Traverser.
static <T> Traverser<T>	Traversers.traverseIterator(Iterator<? extends T> iterator, boolean ignoreNulls) Returns an adapter from Iterator to Traverser.
static <T> Traverser<T>	Traversers.traverseSpliterator(Spliterator<T> spliterator) Returns an adapter from Spliterator to Traverser.
static <T> Traverser<T>	Traversers.traverseStream(Stream<T> stream) Returns a traverser over the given stream.

Method parameters in com.hazelcast.jet with type arguments of type Traverser

Modifier and Type	Method and Description
default <R> Traverser<R>	Traverser.flatMap(Function<? super T,? extends Traverser<R>> flatMapFn) Returns a traverser that will apply the given mapping function to each item retrieved from this traverser and emit all the items from the resulting traversers, which must be null-terminated.
static <T> Traverser<T>	Traversers.lazy(Supplier<Traverser<T>> supplierOfTraverser) Flattens a supplier of traverser into a lazy-initialized traverser.

Uses of Traverser in com.hazelcast.jet.aggregate

Method parameters in com.hazelcast.jet.aggregate with type arguments of type Traverser

Modifier and Type	Method and Description
static <T,U,A,R> AggregateOperation1<T,A,R>	AggregateOperations.flatMapping(FunctionEx<? super T,? extends Traverser<? extends U>> flatMapFn, AggregateOperation1<? super U,A,? extends R> downstream) Adapts an aggregate operation that takes items of type U to one that takes items of type T, by exploding each T into a sequence of Us and then accumulating all of them.

Uses of Traverser in com.hazelcast.jet.core

Classes in com.hazelcast.jet.core that implement Traverser

Modifier and Type	Class and Description
class	AppendableTraverser<T> A traverser with an internal ArrayDeque.
class	ResettableSingletonTraverser<T> Traverses over a single item which can be set from the outside, by using this traverser as a Consumer<T>.

Methods in com.hazelcast.jet.core that return Traverser

Modifier and Type	Method and Description
Traverser<Object>	EventTimeMapper.flatMapEvent(long now, T event, int partitionIndex, long nativeEventTime) A lower-level variant of flatMapEvent(T, int, long) that accepts an explicit result of a System.nanoTime() call.
Traverser<Object>	EventTimeMapper.flatMapEvent(T event, int partitionIndex, long nativeEventTime) Flat-maps the given event by (possibly) prepending it with a watermark.
Traverser<Object>	EventTimeMapper.flatMapIdle() Call this method when there is no event to emit.
Traverser<Object>	EventTimeMapper.removePartition(int partitionIndex) Removes a partition that will no longer have events.

Methods in com.hazelcast.jet.core with parameters of type Traverser

Modifier and Type	Method and Description
protected <E> boolean	AbstractProcessor.emitFromTraverser(int[] ordinals, Traverser<E> traverser) Obtains items from the traverser and offers them to the outbox's buckets identified in the supplied array.
protected <E> boolean	AbstractProcessor.emitFromTraverser(int ordinal, Traverser<E> traverser) Obtains items from the traverser and offers them to the outbox's buckets identified in the supplied array.
protected boolean	AbstractProcessor.emitFromTraverser(Traverser<?> traverser) Convenience for AbstractProcessor.emitFromTraverser(int, Traverser) which emits to all ordinals.
protected <T extends Map.Entry<?,?>> boolean	AbstractProcessor.emitFromTraverserToSnapshot(Traverser<T> traverser) Obtains items from the traverser and offers them to the snapshot bucket of the outbox.

Method parameters in com.hazelcast.jet.core with type arguments of type Traverser

Modifier and Type	Method and Description
protected <T,R> AbstractProcessor.FlatMapper<T,R>	AbstractProcessor.flatMapper(Function<? super T,? extends Traverser<? extends R>> mapper) Factory of AbstractProcessor.FlatMapper.
protected <T,R> AbstractProcessor.FlatMapper<T,R>	AbstractProcessor.flatMapper(int[] ordinals, Function<? super T,? extends Traverser<? extends R>> mapper) Factory of AbstractProcessor.FlatMapper.
protected <T,R> AbstractProcessor.FlatMapper<T,R>	AbstractProcessor.flatMapper(int ordinal, Function<? super T,? extends Traverser<? extends R>> mapper) Factory of AbstractProcessor.FlatMapper.

Uses of Traverser in com.hazelcast.jet.core.processor

Method parameters in com.hazelcast.jet.core.processor with type arguments of type Traverser

Modifier and Type	Method and Description
static <T,R> SupplierEx<Processor>	Processors.flatMapP(FunctionEx<? super T,? extends Traverser<? extends R>> flatMapFn) Returns a supplier of processors for a vertex that applies the provided item-to-traverser mapping function to each received item and emits all the items from the resulting traverser.
static <T,K,S,R> SupplierEx<Processor>	Processors.flatMapStatefulP(long ttl, FunctionEx<? super T,? extends K> keyFn, ToLongFunctionEx<? super T> timestampFn, Supplier<? extends S> createFn, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> statefulFlatMapFn, TriFunction<? super S,? super K,? super Long,? extends Traverser<R>> onEvictFn) Returns a supplier of processors for a vertex that performs a stateful flat-mapping of its input.
static <T,K,S,R> SupplierEx<Processor>	Processors.flatMapStatefulP(long ttl, FunctionEx<? super T,? extends K> keyFn, ToLongFunctionEx<? super T> timestampFn, Supplier<? extends S> createFn, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> statefulFlatMapFn, TriFunction<? super S,? super K,? super Long,? extends Traverser<R>> onEvictFn) Returns a supplier of processors for a vertex that performs a stateful flat-mapping of its input.
static <C,S,T,R> ProcessorSupplier	Processors.flatMapUsingServiceP(ServiceFactory<C,S> serviceFactory, BiFunctionEx<? super S,? super T,? extends Traverser<R>> flatMapFn) Returns a supplier of processors for a vertex that applies the provided item-to-traverser mapping function to each received item and emits all the items from the resulting traverser.

Uses of Traverser in com.hazelcast.jet.pipeline

Method parameters in com.hazelcast.jet.pipeline with type arguments of type Traverser

Modifier and Type	Method and Description
<R> BatchStage<R>	BatchStage.flatMap(FunctionEx<? super T,? extends Traverser<R>> flatMapFn)
<R> GeneralStage<R>	GeneralStage.flatMap(FunctionEx<? super T,? extends Traverser<R>> flatMapFn) Attaches a flat-mapping stage which applies the supplied function to each input item independently and emits all the items from the Traverser it returns.
<R> StreamStage<R>	StreamStage.flatMap(FunctionEx<? super T,? extends Traverser<R>> flatMapFn)
<S,R> StreamStage<R>	StreamStageWithKey.flatMapStateful(long ttl, SupplierEx<? extends S> createFn, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> flatMapFn, TriFunction<? super S,? super K,? super Long,? extends Traverser<R>> onEvictFn) Attaches a stage that performs a stateful flat-mapping operation.
<S,R> StreamStage<R>	StreamStageWithKey.flatMapStateful(long ttl, SupplierEx<? extends S> createFn, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> flatMapFn, TriFunction<? super S,? super K,? super Long,? extends Traverser<R>> onEvictFn) Attaches a stage that performs a stateful flat-mapping operation.
<S,R> BatchStage<R>	BatchStage.flatMapStateful(SupplierEx<? extends S> createFn, BiFunctionEx<? super S,? super T,? extends Traverser<R>> flatMapFn)
<S,R> GeneralStage<R>	GeneralStage.flatMapStateful(SupplierEx<? extends S> createFn, BiFunctionEx<? super S,? super T,? extends Traverser<R>> flatMapFn) Attaches a stage that performs a stateful flat-mapping operation.
<S,R> StreamStage<R>	StreamStage.flatMapStateful(SupplierEx<? extends S> createFn, BiFunctionEx<? super S,? super T,? extends Traverser<R>> flatMapFn)
<S,R> StreamStage<R>	StreamStageWithKey.flatMapStateful(SupplierEx<? extends S> createFn, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> flatMapFn)
<S,R> BatchStage<R>	BatchStageWithKey.flatMapStateful(SupplierEx<? extends S> createFn, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> flatMapFn)
<S,R> GeneralStage<R>	GeneralStageWithKey.flatMapStateful(SupplierEx<? extends S> createFn, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> flatMapFn) Attaches a stage that performs a stateful flat-mapping operation.
<S,R> BatchStage<R>	BatchStage.flatMapUsingService(ServiceFactory<?,S> serviceFactory, BiFunctionEx<? super S,? super T,? extends Traverser<R>> flatMapFn)
<S,R> GeneralStage<R>	GeneralStage.flatMapUsingService(ServiceFactory<?,S> serviceFactory, BiFunctionEx<? super S,? super T,? extends Traverser<R>> flatMapFn) Attaches a flat-mapping stage which applies the supplied function to each input item independently and emits all items from the Traverser it returns as the output items.
<S,R> StreamStage<R>	StreamStage.flatMapUsingService(ServiceFactory<?,S> serviceFactory, BiFunctionEx<? super S,? super T,? extends Traverser<R>> flatMapFn)
<S,R> StreamStage<R>	StreamStageWithKey.flatMapUsingService(ServiceFactory<?,S> serviceFactory, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> flatMapFn)
<S,R> BatchStage<R>	BatchStageWithKey.flatMapUsingService(ServiceFactory<?,S> serviceFactory, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> flatMapFn)
<S,R> GeneralStage<R>	GeneralStageWithKey.flatMapUsingService(ServiceFactory<?,S> serviceFactory, TriFunction<? super S,? super K,? super T,? extends Traverser<R>> flatMapFn) Deprecated. Jet now has first-class support for data rebalancing, see GeneralStage.rebalance() and GeneralStage.rebalance(FunctionEx).