Package org.apache.heron.streamlet

Interface Summary

Interface	Description
Builder	Builder is used to register all sources.
Context	Context is the information available at runtime for operators like transform.
IStreamletBasicOperator<R,T>	The interface for streamlet operators.
IStreamletOperator<R,T>	The base interface for all Streamlet operator interfaces.
IStreamletRichOperator<R,T>	The interface for custom operators: it can be used to create operators based on existing Bolts (subclasses of IRichBolt).
IStreamletWindowOperator<R,T>	The interface for streamlet operators.
KVStreamlet<K,V>	A KVStreamlet is a Streamlet with KeyValue data.
SerializableBiFunction<A,B,C>	All user supplied transformation functions have to be serializable.
SerializableBinaryOperator<T>	All user supplied transformation functions have to be serializable.
SerializableConsumer<T>	All user supplied transformation functions have to be serializable.
SerializableFunction<A,B>	All user supplied transformation functions have to be serializable.
SerializablePredicate<T>	All user supplied transformation functions have to be serializable.
SerializableSupplier<T>	All user supplied transformation functions have to be serializable.
SerializableTransformer<I,O>	All user supplied transformation functions have to be serializable.
Sink<T>	Sink is how Streamlet's end.
Source<T>	Source is how Streamlet's originate.
Streamlet<R>	A Streamlet is a (potentially unbounded) ordered collection of tuples.
StreamletBase<R>	A Streamlet is a (potentially unbounded) ordered collection of tuples.
WindowConfig	WindowConfig allows Streamlet API users to program window configuration for operations that rely on windowing.

Class Summary

Class	Description
Config	Config is the way users configure the execution of the topology.
Config.Builder
KeyedWindow<T>	Transformation depending on Windowing pass on the window/key information using this class
KeyValue<K,V>	Certain operations in the Streamlet API, like join/reduce, necessitate the concept of key value pairs.
Runner	Runner is used to run a topology that is built by the builder.
StreamletReducers	This class contains a few standard reduces that can be used with Streamlet reduce functions such as reduceByKeyAndWindow.
Window	Window is a container containing information about a particular window.

Enum Summary

Enum	Description
Config.DeliverySemantics	An enum encapsulating the delivery semantics that can be applied to Heron topologies.
Config.Serializer	An enum encapsulating the serializers that can be used for data in the topology.
JoinType