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using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Tango.BL;
using Tango.BL.Entities;
using Tango.BL.Enumerations;
using Tango.Logging;
using Tango.MachineStudio.Common.Authentication;
using Tango.MachineStudio.Common.StudioApplication;
using Tango.PMR.Diagnostics;
namespace Tango.MachineStudio.Common.EventLogging
{
public class DefaultEventLogger : IEventLogger
{
private ObservablesContext _db;
private Thread _logThread;
private ConcurrentQueue<MachinesEvent> _events;
private IStudioApplicationManager _application;
private IAuthenticationProvider _authentication;
private Dictionary<EventTypes, String> _eventTypesGuids;
/// <summary>
/// Initializes a new instance of the <see cref="DefaultEventLogger"/> class.
/// </summary>
/// <param name="applicationManager">The application manager.</param>
/// <param name="authenticationProvider">The authentication provider.</param>
public DefaultEventLogger(IStudioApplicationManager applicationManager, IAuthenticationProvider authenticationProvider)
{
_events = new ConcurrentQueue<MachinesEvent>();
_db = ObservablesContext.CreateDefault();
_db.Configuration.LazyLoadingEnabled = false;
_eventTypesGuids = new Dictionary<EventTypes, string>();
_db.ActionTypes.ToList();
_db.EventTypesCategories.ToList();
_db.EventTypesGroups.ToList();
_db.EventTypes.ToList();
foreach (var type in _db.EventTypes)
{
_eventTypesGuids.Add((EventTypes)type.Code, type.Guid);
}
_application = applicationManager;
_authentication = authenticationProvider;
_logThread = new Thread(LogThreadMethod);
_logThread.IsBackground = true;
_logThread.Start();
}
/// <summary>
/// Logs the specified machine event.
/// </summary>
/// <param name="machineEvent">The machine event.</param>
public void Log(MachinesEvent machineEvent)
{
_events.Enqueue(machineEvent);
}
/// <summary>
/// Logs the specified event type.
/// </summary>
/// <param name="eventType">Type of the event.</param>
/// <param name="message">The message.</param>
public void Log(EventTypes eventType, string message)
{
MachinesEvent machineEvent = new MachinesEvent();
machineEvent.MachineGuid = _application.ConnectedMachine.Guid;
machineEvent.DateTime = DateTime.UtcNow;
machineEvent.Description = message;
machineEvent.EventTypeGuid = _eventTypesGuids[eventType];
machineEvent.UserGuid = _authentication.CurrentUser.Guid;
Log(machineEvent);
}
/// <summary>
/// Logs the specified hardware event.
/// </summary>
/// <param name="hardwareEvent">The hardware event.</param>
public void Log(Event hardwareEvent)
{
Log((EventTypes)hardwareEvent.Type, hardwareEvent.Message);
}
/// <summary>
/// Logs the specified exception using the <see cref="EventTypes.ApplicationException"/>.
/// </summary>
/// <param name="exception">The exception.</param>
public void Log(Exception exception)
{
Log(EventTypes.ApplicationException, exception.Message);
}
/// <summary>
/// Logs the specified message using the <see cref="EventTypes.ApplicationInformation"/>.
/// </summary>
/// <param name="message">The message.</param>
public void Log(String message)
{
Log(EventTypes.ApplicationInformation, message);
}
private void LogThreadMethod()
{
try
{
while (true)
{
bool _saveChanges = false;
while (_events.Count > 0)
{
MachinesEvent ev = null;
if (_events.TryDequeue(out ev))
{
_db.MachinesEvents.Add(ev);
_saveChanges = true;
}
}
if (_saveChanges)
{
_db.SaveChanges();
}
Thread.Sleep(5000);
}
}
catch (Exception ex)
{
LogManager.Default.Log(ex, "Error saving machine event to database.");
}
}
}
}
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