private static void HandleCancelQuery(WvDbus conn, WvDbusMsg msg)
{
log.print(WvLog.L.Debug4, "Received CancelQuery request\n");
//FIXME: Should I be in yet another thread?
Action perform = null;
if (msg.signature != "u" && msg.signature != "s")
{
//accept 's' signatures for Perl DBus, which is stupid and can't
//send me 'u' parameters, even though the api accepts them.
log.print(WvLog.L.Debug4, "CancelQuery: bad signature {0}\n",
msg.signature);
perform = () => {
conn.send(msg.err_reply(
"org.freedesktop.DBus.Error.UnknownMethod",
"No overload of {0} has signature '{1}'",
"CancelQuery", msg.signature));
};
}
else
{
var it = msg.iter();
uint tokill;
if (msg.signature == "s")
{
log.print(WvLog.L.Debug4,
"CancelQuery: converting arg from string\n");
string temps = it.pop();
tokill = Convert.ToUInt32(temps);
}
else
tokill = it.pop();
log.print(WvLog.L.Debug4,
"CancelQuery: try killing msg id {0}\n", tokill);
lock (action_mutex)
{
if (curaction != null && curaction.conn == conn &&
curaction.src.serial == tokill)
{
log.print(WvLog.L.Debug4,
"CancelQuery: killing current action!\n");
WvSqlRows_IDataReader.Cancel();
curaction = null;
}
else
{
log.print(WvLog.L.Debug4,
"CancelQuery: traversing action queue...\n");
//Traverse the action queue, killing stuff
foreach (VxActionTriple t in action_queue)
if (t.conn == conn && t.src.serial == tokill)
{
log.print(WvLog.L.Debug4,
"CancelQuery: found culprit, killing.\n");
//action_queue.Remove(t);
//FIXME: What message should we really put here?
t.action = () => {
conn.send(t.src.err_reply("vx.db.sqlerror",
"This message got canceled"));
};
break;
}
}
}
//Pointless return to make Perl happy.
perform = () => {
WvDbusWriter writer = new WvDbusWriter();
writer.Write("Cancel");
conn.send(msg.reply("s").write(writer));
};
log.print(WvLog.L.Debug4, "CancelQuery: complete\n");
}
//FIXME: It's not clear whether for just add operations, in conjuction
//with RemoveAt(0) going on in the otherthread, we need a mutex.
action_queue.Add(new VxActionTriple(conn, msg, perform));
}
static bool WvDbusMsgReady(WvDbus conn, WvDbusMsg msg)
{
// FIXME: This should really queue things to be run from the thread
// pool and then the response would be sent back through the action
// queue
log.print(WvLog.L.Debug4, "WvDbusMsgReady\n");
switch (msg.type)
{
case Wv.Dbus.MType.MethodCall:
if (msg.ifc == "vx.db")
{
if (msg.path == "/db" && msg.method == "CancelQuery")
HandleCancelQuery(conn, msg);
else //not 'CancelQuery'
{
//FIXME: It's not clear whether for just add operations,
//in conjuction with RemoveAt(0) going on in the other
//thread, we need a mutex.
action_queue.Add(new VxActionTriple(conn, msg,
() => {
WvDbusMsg reply;
if (msgrouter.route(conn, msg, out reply))
{
if (reply == null) {
// FIXME: Do something if this happens, maybe?
log.print("Empty reply from RouteWvDbusMsg\n");
} else {
// XXX: Should this be done further down rather
// than passing the reply out here?
conn.send(reply);
}
}
}));
}
return true;
}
return false;
default:
log.print(WvLog.L.Warning,
"Unexpected DBus message received: #{0} {1}->{2} {3}:{4}.{5}\n",
msg.serial, msg.sender, msg.dest,
msg.path, msg.ifc, msg.method);
return false;
}
}