Package org.epics.archiverappliance.etl

Interface ETLBulkStream

All Superinterfaces:

AutoCloseable, Closeable, EventStream, Iterable<Event>

All Known Implementing Classes:

FileBackedPBEventStream

public interface ETLBulkStream
extends EventStream

Event streams can optionally implement bulk transfer friendly methods. If this interface is implemented, then ETL code will use bulk transfers whan moving data.

Author:

mshankar

Method Summary

Modifier and Type	Method	Description
ReadableByteChannel	getByteChannel(BasicContext context)	Get a byte channel positioned at the first event (after the header).
Event	getFirstEvent(BasicContext context)	Get the first event in this event stream.

Methods inherited from interface java.io.Closeable

close

Methods inherited from interface org.epics.archiverappliance.EventStream

getDescription

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Method Details

getFirstEvent

Event getFirstEvent(BasicContext context)
             throws IOException

Get the first event in this event stream. If there are no events in this stream, return null.

Parameters:

context - BasicContext

Returns:

Event return the first event, or null

Throws:

IOException -  

getByteChannel

ReadableByteChannel getByteChannel(BasicContext context)
                            throws IOException

Get a byte channel positioned at the first event (after the header).

Parameters:

context - BasicContext

Returns:

ReadableByteChannel A channel that can read bytes.

Throws:

IOException -  

See Also:

• java.nio.channels.ReadableByteChannel