This is returned by getNextEntry(). More...

#include <RaftConsensus.h>

Public Types
enum	{ DATA, SNAPSHOT, SKIP }
	The type of the entry. More...
Public Member Functions
	Entry ()
	Default constructor.
	Entry (Entry &&other)
	Move constructor.
	~Entry ()
	Destructor.
	Entry (const Entry &)
Entry &	operator= (const Entry &)
Public Attributes
uint64_t	index
	The Raft log index for this entry (or the last one a snapshot covers).
enum LogCabin::Server::RaftConsensus::Entry:: { ... }	type
	The type of the entry.
Core::Buffer	command
	The client request for entries of type 'DATA'.
std::unique_ptr < Storage::SnapshotFile::Reader >	snapshotReader
	A handle to the snapshot file for entries of type 'SNAPSHOT'.
uint64_t	clusterTime
	Cluster time when leader created entry/snapshot.

Detailed Description

This is returned by getNextEntry().

Definition at line 899 of file RaftConsensus.h.

Member Enumeration Documentation

anonymous enum

The type of the entry.

Enumerator:

DATA

This is a normal entry containing a client request for the state machine.

The 'data' field contains that request, and 'snapshotReader' is not set.

SNAPSHOT

This is a snapshot: the state machine should clear its state and load in the snapshot.

The 'data' field is not set, and the 'snapshotReader' should be used to read the snapshot contents from.

SKIP

Some entries should be ignored by the state machine (they are consumed internally by the consensus module).

For client service threads to know when a state machine is up-to-date, it's easiest for the state machine to get empty entries back for these, and simply call back into getNextEntry() again with the next ID, Entries of type 'SKIP' will have neither 'data' nor 'snapshotReader' set.

Definition at line 917 of file RaftConsensus.h.