private EpochRecord WriteEpochRecordWithRetry(int epochNumber, Guid epochId, long lastEpochPosition,
Guid instanceId)
{
long pos = _writer.Checkpoint.ReadNonFlushed();
var epoch = new EpochRecord(pos, epochNumber, epochId, lastEpochPosition, DateTime.UtcNow, instanceId);
var rec = new SystemLogRecord(epoch.EpochPosition, epoch.TimeStamp, SystemRecordType.Epoch,
SystemRecordSerialization.Json, epoch.AsSerialized());
Log.Debug(
"=== Writing E{epochNumber}@{epochPosition}:{epochId:B} (previous epoch at {lastEpochPosition}). L={leaderId:B}.",
epochNumber, epoch.EpochPosition, epochId, lastEpochPosition, epoch.LeaderInstanceId);
if (!_writer.Write(rec, out pos))
{
epoch = new EpochRecord(pos, epochNumber, epochId, lastEpochPosition, DateTime.UtcNow, instanceId);
rec = new SystemLogRecord(epoch.EpochPosition, epoch.TimeStamp, SystemRecordType.Epoch,
SystemRecordSerialization.Json, epoch.AsSerialized());
if (!_writer.Write(rec, out pos))
{
throw new Exception($"Second write try failed at {epoch.EpochPosition}.");
}
}
_writer.Flush();
_bus.Publish(new SystemMessage.EpochWritten(epoch));
return(epoch);
}
public ISystemLogRecord CreateEpoch(EpochRecord epoch)
{
var result = new SystemLogRecord(
logPosition: epoch.EpochPosition,
timeStamp: epoch.TimeStamp,
systemRecordType: SystemRecordType.Epoch,
systemRecordSerialization: SystemRecordSerialization.Json,
data: epoch.AsSerialized());
return(result);
}
private EpochRecord WriteEpoch(int epochNumber, long lastPos, Guid instanceId)
{
long pos = _writer.Checkpoint.ReadNonFlushed();
var epoch = new EpochRecord(pos, epochNumber, Guid.NewGuid(), lastPos, DateTime.UtcNow, instanceId);
var rec = new SystemLogRecord(epoch.EpochPosition, epoch.TimeStamp, SystemRecordType.Epoch,
SystemRecordSerialization.Json, epoch.AsSerialized());
_writer.Write(rec, out _);
_writer.Flush();
return(epoch);
}
public override void When()
{
_epochId = Guid.NewGuid();
_epochNumber = 7;
var epoch = new EpochRecord(0, _epochNumber, _epochId, -1, DateTime.UtcNow, Guid.Empty);
var rec = new SystemLogRecord(epoch.EpochPosition, epoch.TimeStamp, SystemRecordType.Epoch,
SystemRecordSerialization.Json, epoch.AsSerialized());
Assert.True(Writer.Write(rec, out _));
Writer.Flush();
}
private void ProcessSystemRecord(SystemLogRecord record)
{
CommitPendingTransaction(_transaction, isTfEof: true);
if (record.SystemRecordType == SystemRecordType.Epoch)
{
// Epoch record is written to TF, but possibly is not added to EpochManager
// as we could be in Slave\Clone mode. We try to add epoch to EpochManager
// every time we encounter EpochRecord while chasing. SetLastEpoch call is idempotent,
// but does integrity checks.
var epoch = record.GetEpochRecord();
_epochManager.SetLastEpoch(epoch);
}
}
private EpochRecord WriteEpochRecordWithRetry(int epochNumber, Guid epochId, long lastEpochPosition)
{
long pos = _writer.Checkpoint.ReadNonFlushed();
var epoch = new EpochRecord(pos, epochNumber, epochId, lastEpochPosition, DateTime.UtcNow);
var rec = new SystemLogRecord(epoch.EpochPosition, epoch.TimeStamp, SystemRecordType.Epoch, SystemRecordSerialization.Json, epoch.AsSerialized());
if (!_writer.Write(rec, out pos))
{
epoch = new EpochRecord(pos, epochNumber, epochId, lastEpochPosition, DateTime.UtcNow);
rec = new SystemLogRecord(epoch.EpochPosition, epoch.TimeStamp, SystemRecordType.Epoch, SystemRecordSerialization.Json, epoch.AsSerialized());
if (!_writer.Write(rec, out pos))
{
throw new Exception(string.Format("Second write try failed at {0}.", epoch.EpochPosition));
}
}
Log.Debug("=== Writing E{0}@{1}:{2:B} (previous epoch at {3}).", epochNumber, epoch.EpochPosition, epochId, lastEpochPosition);
return(epoch);
}
public List <SystemLogRecord> GetSystemLog(DateTime _startDate, DateTime _endDate, string _logtype, string _context)
{
List <SystemLogRecord> _ret = new List <SystemLogRecord>();
string _sql = " select ID,CZSJ,LOGTYPE,LOGTEXT ";
_sql += " from xt_systemlog t ";
_sql += " where (CZSJ between :KSRQ and :JSRQ ) ";
if (_logtype.Trim().Length > 0)
{
_sql += string.Format(" and LOGTYPE='{0}' ", _logtype);
}
if (_context.Trim().Length > 0)
{
_sql += " and (LOGTEXT like '%" + _context + "%' ) ";
}
_sql += " order by CZSJ DESC ";
OracleParameter[] _param =
{
new OracleParameter(":KSRQ", OracleDbType.Date),
new OracleParameter(":JSRQ", OracleDbType.Date)
};
_param[0].Value = _startDate;
_param[1].Value = _endDate;
OracleDataReader dr = OracleHelper.ExecuteReader(OracleHelper.ConnectionStringProfile, CommandType.Text,
_sql, _param);
while (dr.Read())
{
SystemLogRecord _mitem = new SystemLogRecord(
dr.IsDBNull(0) ? "" : dr.GetString(0),
dr.IsDBNull(1) ? DateTime.MinValue : dr.GetDateTime(1),
dr.IsDBNull(2) ? "" : dr.GetString(2),
dr.IsDBNull(3) ? "" : dr.GetString(3)
);
_ret.Add(_mitem);
}
dr.Close();
return(_ret);
}
private EpochRecord WriteEpochRecordWithRetry(int epochNumber, Guid epochId, long lastEpochPosition)
{
long pos = _writer.Checkpoint.ReadNonFlushed();
var epoch = new EpochRecord(pos, epochNumber, epochId, lastEpochPosition, DateTime.UtcNow);
var rec = new SystemLogRecord(epoch.EpochPosition, epoch.TimeStamp, SystemRecordType.Epoch, SystemRecordSerialization.Json, epoch.AsSerialized());
if (!_writer.Write(rec, out pos))
{
epoch = new EpochRecord(pos, epochNumber, epochId, lastEpochPosition, DateTime.UtcNow);
rec = new SystemLogRecord(epoch.EpochPosition, epoch.TimeStamp, SystemRecordType.Epoch, SystemRecordSerialization.Json, epoch.AsSerialized());
if (!_writer.Write(rec, out pos))
throw new Exception(string.Format("Second write try failed at {0}.", epoch.EpochPosition));
}
Log.Debug("=== Writing E{0}@{1}:{2:B} (previous epoch at {3}).", epochNumber, epoch.EpochPosition, epochId, lastEpochPosition);
return epoch;
}
