org.tools4j.elara.log

Interface MessageLog.Poller

All Known Subinterfaces:

IndexTrackingPoller

All Known Implementing Classes:

CommittedEventPoller, DefaultIndexTrackingPoller

Enclosing interface:

MessageLog

public static interface MessageLog.Poller

Method Summary

Modifier and Type	Method and Description
long	entryId() Returns the current entry ID of this poller.
boolean	moveTo(long entryId)
MessageLog.Poller	moveToEnd()
boolean	moveToNext()
boolean	moveToPrevious()
MessageLog.Poller	moveToStart()
int	poll(MessageLog.Handler handler)

Method Detail

entryId

long entryId()

Returns the current entry ID of this poller.

It returns the entry ID of the message currently polled if invoked while polling a message. Otherwise it returns the entry ID of the next message to be polled.

The index is monotonically increasing but not necessarily gap free; for instance for a chronicle message log the entry ID consists of cycle and the sequence number within that cycle.

Returns:

the current entry ID of this poller.

moveTo

boolean moveTo(long entryId)

moveToNext

boolean moveToNext()

moveToPrevious

boolean moveToPrevious()

moveToStart

MessageLog.Poller moveToStart()

moveToEnd

MessageLog.Poller moveToEnd()

poll

int poll(MessageLog.Handler handler)