io.aeron.logbuffer

Class TermUnblocker

java.lang.Object

io.aeron.logbuffer.TermUnblocker

public class TermUnblocker
extends Object

Unblocks a term buffer if a publisher has died leaving the log with a partial log entry.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TermUnblocker.Status Status result of an unblock(UnsafeBuffer, UnsafeBuffer, int, int, int) operation.

Constructor Summary

Constructors

Constructor and Description
TermUnblocker()

Method Summary

Modifier and Type	Method and Description
static TermUnblocker.Status	unblock(UnsafeBuffer logMetaDataBuffer, UnsafeBuffer termBuffer, int blockedOffset, int tailOffset, int termId) Attempt to unblock the current term at the current offset.

Methods inherited from class java.lang.Object

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

Constructor Detail

TermUnblocker

public TermUnblocker()

Method Detail

unblock

public static TermUnblocker.Status unblock(UnsafeBuffer logMetaDataBuffer,
                                           UnsafeBuffer termBuffer,
                                           int blockedOffset,
                                           int tailOffset,
                                           int termId)

Attempt to unblock the current term at the current offset.

1. Current position length is > 0, then return
2. Current position length is 0, scan forward by frame alignment until, one of the following:
   1. reach a non-0 length, unblock up to indicated position (check original frame length for non-0)
   2. reach end of term and tail position >= end of term, unblock up to end of term (check original frame length for non-0)
   3. reach tail position < end of term, do NOT unblock

Parameters:

logMetaDataBuffer - containing the default headers

termBuffer - to unblock

blockedOffset - to unblock at

tailOffset - to unblock up to

termId - for the current term.

Returns:

whether unblocking was done, not done, or applied to end of term