org.gcube.data.streams.generators
Class LoggingListener<E>

java.lang.Object
  org.gcube.data.streams.delegates.StreamListenerAdapter
      org.gcube.data.streams.generators.LoggingListener<E>

Type Parameters:

E - the type of stream elements

All Implemented Interfaces:

StreamListener, Generator<E,E>

public class LoggingListener<E>
extends StreamListenerAdapter
implements Generator<E,E>

A pass-through Generator that acts as a StreamListener for throughput logging purposes.

Author:

Fabio Simeoni

Field Summary

Fields inherited from interface org.gcube.data.streams.generators.Generator

iteration

Constructor Summary

LoggingListener()

Method Summary

void	onClose() Invoked then stream is closed.
void	onStart() Invoked after the first element of the target Stream has been iterated over.
E	yield(E element) Yields an element of a Stream from an element of another Stream.

Methods inherited from class org.gcube.data.streams.delegates.StreamListenerAdapter

onEnd

Methods inherited from class java.lang.Object

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

Constructor Detail

LoggingListener

public LoggingListener()

Method Detail

onStart

public void onStart()

Invoked after the first element of the target Stream has been iterated over.

Specified by:

onStart in interface StreamListener

Overrides:

onStart in class StreamListenerAdapter

yield

public E yield(E element)

Yields an element of a Stream from an element of another Stream.

Specified by:

yield in interface Generator<E,E>

Parameters:

element - the input element

Returns:

the output element

onClose

public void onClose()

Invoked then stream is closed.

Specified by:

onClose in interface StreamListener

Overrides:

onClose in class StreamListenerAdapter