public LiteLog(RaftStateMachine rn, string workPath)
{
this.statemachine = rn;
db = new LiteDatabase(workPath);
stateTableName += "_" + rn.entitySettings.EntityName;
var col = this.db.GetCollection <StateLogEntry>(this.stateTableName);
var list = col.Query().ToList();
var toprow = list.OrderByDescending(s => s.Index).OrderByDescending(s => s.Term).FirstOrDefault();
StateLogEntry sle = null;
if (toprow != null)
{
sle = toprow;
StateLogId = sle.Index;
StateLogTerm = sle.Term;
PreviousStateLogId = sle.PreviousStateLogId;
PreviousStateLogTerm = sle.PreviousStateLogTerm;
tempPrevStateLogId = PreviousStateLogId;
tempPrevStateLogTerm = PreviousStateLogTerm;
tempStateLogId = StateLogId;
tempStateLogTerm = StateLogTerm;
rn.NodeTerm = sle.Term;
}
toprow = col.Query().ToList().OrderByDescending(s => s.Index).OrderByDescending(s => s.Term).FirstOrDefault();
if (toprow != null)
{
LastCommittedIndex = toprow.Index;
LastCommittedIndexTerm = toprow.Term;
}
}
public StateLog(RaftStateMachine rn, DBreezeEngine dbEngine)
{
this.statemachine = rn;
this.db = dbEngine;
if (rn.entitySettings.EntityName != "default")
{
stateTableName += "_" + rn.entitySettings.EntityName;
}
using (var t = this.db.GetTransaction())
{
var row = t.SelectBackwardFromTo <byte[], byte[]>(stateTableName,
new byte[] { 1 }.ToBytes(ulong.MaxValue, ulong.MaxValue), true,
new byte[] { 1 }.ToBytes(ulong.MinValue, ulong.MinValue), true)
.FirstOrDefault();
StateLogEntry sle = null;
if (row != null && row.Exists)
{
sle = StateLogEntry.BiserDecode(row.Value);
StateLogId = sle.Index;
StateLogTerm = sle.Term;
PreviousStateLogId = sle.PreviousStateLogId;
PreviousStateLogTerm = sle.PreviousStateLogTerm;
//tempPrevStateLogId = PreviousStateLogId;
//tempPrevStateLogTerm = PreviousStateLogTerm;
//tempStateLogId = StateLogId;
//tempStateLogTerm = StateLogTerm;
rn.NodeTerm = sle.Term;
}
var rowTerm = t.Select <byte[], byte[]>(stateTableName, new byte[] { 2 });
if (rowTerm.Exists)
{
LastCommittedIndex = rowTerm.Value.Substring(0, 8).To_UInt64_BigEndian();
LastCommittedIndexTerm = rowTerm.Value.Substring(8, 8).To_UInt64_BigEndian();
}
var rowBL = t.Select <byte[], ulong>(stateTableName, new byte[] { 3 });
if (rowBL.Exists)
{
LastBusinessLogicCommittedIndex = rowBL.Value;
}
}
}