/// <summary>
/// Uninstalls target-specific objects from current system.
/// </summary>
/// <param name="installationContext">The installation context.</param>
/// <remarks>
/// Uninstallation typically runs with administrative permissions.
/// </remarks>
public void Uninstall(InstallationContext installationContext)
{
if (installationContext == null)
{
throw new ArgumentNullException("installationContext");
}
InitializeAll();
foreach (var installable in configItems.OfType <IInstallable>())
{
installationContext.Info("Uninstalling '{0}'", installable);
try
{
installable.Uninstall(installationContext);
installationContext.Info("Finished uninstalling '{0}'.", installable);
}
catch (Exception exception)
{
if (exception.MustBeRethrown())
{
throw;
}
installationContext.Error("Uninstallation of '{0}' failed: {1}.", installable, exception);
}
}
}
/// <summary>
/// Performs uninstallation which requires administrative permissions.
/// </summary>
/// <param name="installationContext">The installation context.</param>
public void Uninstall(InstallationContext installationContext)
{
EventLog.DeleteEventSource(Source, MachineName);
}
/// <summary>
/// Determines whether the item is installed.
/// </summary>
/// <param name="installationContext">The installation context.</param>
/// <returns>
/// Value indicating whether the item is installed or null if it is not possible to determine.
/// </returns>
public bool? IsInstalled(InstallationContext installationContext)
{
return EventLog.SourceExists(Source, MachineName);
}
/// <summary>
/// Performs installation which requires administrative permissions.
/// </summary>
/// <param name="installationContext">The installation context.</param>
public void Install(InstallationContext installationContext)
{
if (EventLog.SourceExists(Source, MachineName))
{
var currentLogName = EventLog.LogNameFromSourceName(Source, MachineName);
if (currentLogName != Log)
{
// re-create the association between Log and Source
EventLog.DeleteEventSource(Source, MachineName);
var escd = new EventSourceCreationData(Source, Log)
{
MachineName = MachineName
};
EventLog.CreateEventSource(escd);
}
}
else
{
var escd = new EventSourceCreationData(Source, Log)
{
MachineName = MachineName
};
EventLog.CreateEventSource(escd);
}
}
/// <summary>
/// Ensures that the performance counter has been initialized.
/// </summary>
/// <returns>True if the performance counter is operational, false otherwise.</returns>
private bool EnsureInitialized()
{
if (!initialized)
{
initialized = true;
if (AutoCreate)
{
using (var context = new InstallationContext())
{
Install(context);
}
}
try
{
perfCounter = new PerformanceCounter(CategoryName, CounterName, InstanceName, false);
}
catch (Exception exception)
{
if (exception.MustBeRethrown())
{
throw;
}
InternalLogger.Error("Cannot open performance counter {0}/{1}/{2}: {3}", CategoryName, CounterName, InstanceName, exception);
}
}
return perfCounter != null;
}
/// <summary>
/// Performs uninstallation which requires administrative permissions.
/// </summary>
/// <param name="installationContext">The installation context.</param>
public void Uninstall(InstallationContext installationContext)
{
var categoryName = CategoryName;
if (PerformanceCounterCategory.Exists(categoryName))
{
installationContext.Debug("Deleting category '{0}'", categoryName);
PerformanceCounterCategory.Delete(categoryName);
}
else
{
installationContext.Debug("Category '{0}' does not exist.", categoryName);
}
}
/// <summary>
/// Determines whether the item is installed.
/// </summary>
/// <param name="installationContext">The installation context.</param>
/// <returns>
/// Value indicating whether the item is installed or null if it is not possible to determine.
/// </returns>
public bool? IsInstalled(InstallationContext installationContext)
{
if (!PerformanceCounterCategory.Exists(CategoryName))
{
return false;
}
return PerformanceCounterCategory.CounterExists(CounterName, CategoryName);
}
/// <summary>
/// Performs installation which requires administrative permissions.
/// </summary>
/// <param name="installationContext">The installation context.</param>
public void Install(InstallationContext installationContext)
{
// categories must be installed together, so we must find all PerfCounter targets in the configuration file
var countersByCategory = LoggingConfiguration.AllTargets.OfType<PerformanceCounterTarget>().BucketSort(c => c.CategoryName);
var categoryName = CategoryName;
if (countersByCategory[categoryName].Any(c => c.created))
{
installationContext.Trace("Category '{0}' has already been installed.", categoryName);
return;
}
try
{
PerformanceCounterCategoryType categoryType;
var ccds = GetCounterCreationDataCollection(countersByCategory[CategoryName], out categoryType);
if (PerformanceCounterCategory.Exists(categoryName))
{
installationContext.Debug("Deleting category '{0}'", categoryName);
PerformanceCounterCategory.Delete(categoryName);
}
installationContext.Debug("Creating category '{0}' with {1} counter(s) (Type: {2})", categoryName, ccds.Count, categoryType);
foreach (CounterCreationData c in ccds)
{
installationContext.Trace(" Counter: '{0}' Type: ({1}) Help: {2}", c.CounterName, c.CounterType, c.CounterHelp);
}
PerformanceCounterCategory.Create(categoryName, "Category created by NLog", categoryType, ccds);
}
catch (Exception exception)
{
if (exception.MustBeRethrown())
{
throw;
}
if (installationContext.IgnoreFailures)
{
installationContext.Warning("Error creating category '{0}': {1}", categoryName, exception.Message);
}
else
{
installationContext.Error("Error creating category '{0}': {1}", categoryName, exception.Message);
throw;
}
}
finally
{
foreach (var t in countersByCategory[categoryName])
{
t.created = true;
}
}
}
/// <summary>
/// Uninstalls target-specific objects from current system.
/// </summary>
/// <param name="installationContext">The installation context.</param>
/// <remarks>
/// Uninstallation typically runs with administrative permissions.
/// </remarks>
public void Uninstall(InstallationContext installationContext)
{
if (installationContext == null)
{
throw new ArgumentNullException("installationContext");
}
InitializeAll();
foreach (var installable in configItems.OfType<IInstallable>())
{
installationContext.Info("Uninstalling '{0}'", installable);
try
{
installable.Uninstall(installationContext);
installationContext.Info("Finished uninstalling '{0}'.", installable);
}
catch (Exception exception)
{
if (exception.MustBeRethrown())
{
throw;
}
installationContext.Error("Uninstallation of '{0}' failed: {1}.", installable, exception);
}
}
}
private void RunInstallCommands(InstallationContext installationContext, IEnumerable<DatabaseCommandInfo> commands)
{
// create log event that will be used to render all layouts
var logEvent = installationContext.CreateLogEvent();
try
{
foreach (var commandInfo in commands)
{
string cs;
if (commandInfo.ConnectionString != null)
{
// if there is connection string specified on the command info, use it
cs = commandInfo.ConnectionString.Render(logEvent);
}
else if (InstallConnectionString != null)
{
// next, try InstallConnectionString
cs = InstallConnectionString.Render(logEvent);
}
else
{
// if it's not defined, fall back to regular connection string
cs = BuildConnectionString(logEvent);
}
EnsureConnectionOpen(cs);
var command = activeConnection.CreateCommand();
command.CommandType = commandInfo.CommandType;
command.CommandText = commandInfo.Text.Render(logEvent);
try
{
installationContext.Trace("Executing {0} '{1}'", command.CommandType, command.CommandText);
command.ExecuteNonQuery();
}
catch (Exception exception)
{
if (exception.MustBeRethrown())
{
throw;
}
if (commandInfo.IgnoreFailures || installationContext.IgnoreFailures)
{
installationContext.Warning(exception.Message);
}
else
{
installationContext.Error(exception.Message);
throw;
}
}
}
}
finally
{
CloseConnection();
}
}
/// <summary>
/// Performs uninstallation which requires administrative permissions.
/// </summary>
/// <param name="installationContext">The installation context.</param>
public void Uninstall(InstallationContext installationContext)
{
RunInstallCommands(installationContext, UninstallDdlCommands);
}
/// <summary>
/// Determines whether the item is installed.
/// </summary>
/// <param name="installationContext">The installation context.</param>
/// <returns>
/// Value indicating whether the item is installed or null if it is not possible to determine.
/// </returns>
public bool? IsInstalled(InstallationContext installationContext)
{
return null;
}
