cz.o2.proxima.direct.batch

Interface BatchLogObserver

All Known Implementing Classes:

BatchLogReaders.ForwardingBatchLogObserver, BatchLogReaders.ThroughputLimitedBatchLogObserver

@Stable
public interface BatchLogObserver

Batch observer of data. No commits needed.

Implementations should override either of `onNext` methods.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	BatchLogObserver.OnNextContext Context passed to onNext(cz.o2.proxima.storage.StreamElement).

Method Summary

Modifier and Type	Method and Description
default void	onCancelled() Signalled when the reading is cancelled.
default void	onCompleted() Signalled when the reading is finished.
default boolean	onError(java.lang.Throwable error) Signaled when reading error occurs.
default boolean	onNext(StreamElement element) Read next data from the batch storage.
default boolean	onNext(StreamElement element, BatchLogObserver.OnNextContext context) Read next data from the batch storage.

Method Detail

onNext

default boolean onNext(StreamElement element)

Read next data from the batch storage.

Parameters:

element - the retrieved data element

Returns:

true to continue processing, false otherwise

onNext

default boolean onNext(StreamElement element,
                       BatchLogObserver.OnNextContext context)

Read next data from the batch storage.

Parameters:

element - the retrieved data element

context - context of the data element

Returns:

true to continue processing, false otherwise

onCompleted

default void onCompleted()

Signalled when the reading is finished.

onCancelled

default void onCancelled()

Signalled when the reading is cancelled.

onError

default boolean onError(java.lang.Throwable error)

Signaled when reading error occurs.

Parameters:

error - error caught during processing

Returns:

true to restart processing from beginning false to stop processing