private void SessionDisposed(object sender, EventArgs args)
{
if (_session != null)
{
_session.Disposed -= new EventHandler(SessionDisposed);
_frontendServer._sessions.Remove(_session);
_session = null;
_frontendServer = null;
}
}
// returns the frontend server for the given DAE instance
public static FrontendServer GetFrontendServer(DAE.Server.Engine server)
{
lock (_servers)
{
FrontendServer localServer = _servers[server] as FrontendServer;
if (localServer == null)
{
localServer = new FrontendServer(server);
_servers.Add(server, localServer);
}
return(localServer);
}
}
public FrontendSession(FrontendServer frontendServer, ServerSession session)
{
_frontendServer = frontendServer;
_session = session;
_session.Disposed += new EventHandler(SessionDisposed);
}
public override object InternalExecute(Program program, object[] arguments)
{
FrontendServer.GetFrontendServer(program.ServerProcess.ServerSession.Server).GetFrontendSession(program.ServerProcess.ServerSession).ClearDerivationCache();
return(null);
}
public override object InternalExecute(Program program, object[] arguments)
{
string query = (string)arguments[0];
string pageType = DefaultPageType;
string masterKeyNames = String.Empty;
string detailKeyNames = String.Empty;
bool elaborate = DefaultElaborate;
if (arguments.Length >= 2)
{
if (Operator.Operands[1].DataType.Equals(program.DataTypes.SystemString))
{
pageType = (string)arguments[1];
if (arguments.Length == 3)
{
elaborate = (bool)arguments[2];
}
else if (arguments.Length >= 4)
{
masterKeyNames = (string)arguments[2];
detailKeyNames = (string)arguments[3];
if (arguments.Length == 5)
{
elaborate = (bool)arguments[4];
}
}
}
else
{
elaborate = (bool)arguments[1];
}
}
FrontendServer server = FrontendServer.GetFrontendServer(program.ServerProcess.ServerSession.Server);
FrontendSession session = server.GetFrontendSession(program.ServerProcess.ServerSession);
DerivationSeed seed = new DerivationSeed(pageType, query, elaborate, masterKeyNames, detailKeyNames);
XmlDocument document;
if (session.UseDerivationCache)
{
lock (session.DerivationCache)
{
session.EnsureDerivationCacheConsistent();
DerivationCacheItem item;
if (!session.DerivationCache.TryGetValue(seed, out item))
{
document = BuildInterface(program, seed);
session.DerivationCache.Add(seed, new DerivationCacheItem(document));
}
else
{
document = item.Document;
}
}
}
else
{
document = BuildInterface(program, seed);
}
return(document.OuterXml);
}