private static void ProcessMessage(AgentUpdateMessage message)
{
using (AgentsMonitorContext context = new AgentsMonitorContext())
{
Server existingServer = GetExistingServer(context, message);
UpdateServerFields(existingServer, message, context);
context.SaveChanges();
}
}
private static Server GetExistingServer(AgentsMonitorContext context, AgentUpdateMessage agentUpdateMessage)
{
Server existingServer = context.Servers.FirstOrDefault(server => server.MacAddress == agentUpdateMessage.MacAddress);
if (existingServer == null)
{
existingServer = context.Servers.Create();
context.Servers.Add(existingServer);
}
return existingServer;
}
private void UpdateServerFields(
Server existingServer,
AgentUpdateMessage agentUpdateMessage,
UsersManager userManager)
{
existingServer.MacAddress = agentUpdateMessage.MacAddress;
existingServer.Name = agentUpdateMessage.Name;
existingServer.FreeSpace = agentUpdateMessage.FreeSpace;
existingServer.UsedSpace = agentUpdateMessage.UsedSpace;
existingServer.User = userManager.FindById(agentUpdateMessage.UserId);
}
private static void UpdateServerFields(
Server existingServer,
AgentUpdateMessage agentUpdateMessage,
AgentsMonitorContext context)
{
existingServer.MacAddress = agentUpdateMessage.MacAddress;
existingServer.Name = agentUpdateMessage.Name;
existingServer.FreeSpace = agentUpdateMessage.FreeSpace;
existingServer.UsedSpace = agentUpdateMessage.UsedSpace;
User user = context.Users.Find(agentUpdateMessage.UserId);
existingServer.User = user;
}
private static AgentUpdateInfo GetAgentUpdateInfo(AgentUpdateMessage message, Server existingServer)
{
bool isNew = existingServer.Id == default(int);
bool spaceIsUpdated = existingServer.FreeSpace != message.FreeSpace
|| existingServer.UsedSpace != message.UsedSpace;
if (!isNew && !spaceIsUpdated)
{
return null;
}
return new AgentUpdateInfo { IsNew = isNew, Server = existingServer, UserId = message.UserId };
}
private void ProcessMessage(AgentUpdateMessage message)
{
using (UnitOfWorkService unitOfWork = new UnitOfWorkService())
{
Server existingServer = unitOfWork.ServersRepository.GetServerByMacAddress(message.MacAddress)
?? new Server();
AgentUpdateInfo agentUpdateInfo = GetAgentUpdateInfo(message, existingServer);
this.UpdateServerFields(existingServer, message, unitOfWork.UsersManager);
unitOfWork.ServersRepository.Save(existingServer);
if (agentUpdateInfo != null)
{
this.ServerInfoUpdated?.Invoke(this, agentUpdateInfo);
}
}
}
