cz.o2.proxima.direct.batch

Interface BatchLogReader

All Known Implementing Classes:

BatchLogReaders.ForwardingLimitedBatchLogReader, BatchLogReaders.ThroughputLimitedBatchLogReader, DirectAttributeFamilyProxyDescriptor.ProxyBatchLogReader

@Stable
public interface BatchLogReader

Reader of batch data stored in batch storage.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	BatchLogReader.Factory<T extends BatchLogReader> Serializable factory for BatchLogReader.

Method Summary

Modifier and Type	Method and Description
BatchLogReader.Factory<?>	asFactory() Convert instance of this reader to BatchLogReader.Factory suitable for serialization.
default java.util.List<Partition>	getPartitions() Retrieve list of partitions of this batch observer.
default java.util.List<Partition>	getPartitions(long startStamp) Retrieve list of partitions covering data at least from given starting stamp.
java.util.List<Partition>	getPartitions(long startStamp, long endStamp) Retrieve list of partitions covering data from the given range.
ObserveHandle	observe(java.util.List<Partition> partitions, java.util.List<AttributeDescriptor<?>> attributes, BatchLogObserver observer) Observe data stored in given partitions.

Method Detail

getPartitions

default java.util.List<Partition> getPartitions()

Retrieve list of partitions of this batch observer.

Returns:

list of partitions of this reader

getPartitions

default java.util.List<Partition> getPartitions(long startStamp)

Retrieve list of partitions covering data at least from given starting stamp.

Parameters:

startStamp - timestamp to start reading from

Returns:

list of partitions covering the time range

getPartitions

java.util.List<Partition> getPartitions(long startStamp,
                                        long endStamp)

Retrieve list of partitions covering data from the given range.

Parameters:

startStamp - starting timestamp (inclusive)

endStamp - ending timestamp (exclusive)

Returns:

list of partitions covering the time range

observe

ObserveHandle observe(java.util.List<Partition> partitions,
                      java.util.List<AttributeDescriptor<?>> attributes,
                      BatchLogObserver observer)

Observe data stored in given partitions.

Parameters:

partitions - partitions to observe

attributes - attribute descriptors to filter out

observer - the observer by which to consume the data

Returns:

an ObserveHandle to control the consumption

asFactory

BatchLogReader.Factory<?> asFactory()

Convert instance of this reader to BatchLogReader.Factory suitable for serialization.

Returns:

the BatchLogReader.Factory representing this reader