/// <summary>
/// Execute executes queries that return no rows, but do modify the database. If connection
/// is nil then the utility connection is used.
/// </summary>
/// <param name="c"></param>
/// <param name="ex"></param>
/// <returns></returns>
internal async Task <ExecuteResponse> execute(StoreConnection c, ExecuteRequest ex)
{
if (c == null)
{
connsMu.EnterReadLock();
try
{
c = conns[defaultConnID];
}
finally
{
connsMu.ExitReadLock();
}
}
c.SetLastUsedNow();
var start = DateTime.Now;
var cmd = new Command
{
Typ = CommandType.execute,
Sub = new databaseSub
{
ConnID = c.ID,
Atomic = ex.Atomic,
Queries = ex.Queries,
Timings = ex.Timings
}
};
var f = await raft.Accept(cmd).ThrowOnError();
if (f is FsmExecuteResponse <Command> )
{
return(new ExecuteResponse
{
Results = (f as FsmExecuteResponse <Command>).Results,
Time = (DateTime.Now - start).TotalSeconds,
Raft = new RaftResponse {
NodeID = ID
}
});
}
else if (f is ErrorResponse <Command> )
{
throw new Exception((f as ErrorResponse <Command>).Error);
}
else
{
throw new Exception("unsupported type");
}
}
/// <summary>
/// Query executes queries that return rows, and do not modify the database. If
/// connection is nil, then the utility connection is used.
/// </summary>
/// <param name="c"></param>
/// <param name="qr"></param>
/// <returns></returns>
internal async Task <QueryResponse> query(StoreConnection c, QueryRequest qr)
{
if (c == null)
{
connsMu.EnterReadLock();
try
{
c = conns[defaultConnID];
}
finally
{
connsMu.ExitReadLock();
}
}
c.SetLastUsedNow();
restoreMu.EnterReadLock();
try
{
var start = DateTime.Now;
if (qr.Lvl == ConsistencyLevel.Strong)
{
var d = new databaseSub
{
ConnID = c.ID,
Atomic = qr.Atomic,
Queries = qr.Queries,
Timings = qr.Timings
};
var cmd = new Command {
Typ = CommandType.query, Sub = d
};
var f = await raft.Accept(cmd).ThrowOnError();
if (f is FsmQueryResponse <Command> )
{
return(new QueryResponse
{
Rows = (f as FsmQueryResponse <Command>).Rows,
Time = (DateTime.Now - start).TotalSeconds,
Raft = new RaftResponse {
NodeID = ID
}
});
}
else if (f is ErrorResponse <Command> )
{
throw new Exception((f as ErrorResponse <Command>).Error);
}
else
{
throw new Exception("unsupported type");
}
}
if (qr.Lvl == ConsistencyLevel.Weak && !(raft.State is Leader))
{
throw new NotLeaderException();
}
var r = c.db.Query(qr.Queries.ToArray(), qr.Atomic, qr.Timings);
return(new QueryResponse
{
Rows = r,
Time = (DateTime.Now - start).TotalSeconds
});
}
finally
{
restoreMu.ExitReadLock();
}
}