/// <summary>
/// Writes the specified entry to the event log writers,
/// </summary>
/// <param name="level">The error level.</param>
/// <param name="source">The message source.</param>
/// <param name="message">The message.</param>
private void WriteEntry(EventLogLevel level, string source, string message)
{
DiagnosticsRequestContextData context = DiagnosticsRequestContext.GetContext();
string userName = string.Empty;
long tenantId = -1;
string tenantName = string.Empty;
if (context != null)
{
userName = context.UserName;
tenantId = context.TenantId;
tenantName = context.TenantName;
}
// Truncate messages longer than 10000 chars
if (message != null && message.Length > MaximumMessageSize)
{
message = message.Substring(0, MaximumMessageSize);
}
// Create an event log entry and pass it the writers.
var logEntry = new EventLogEntry(DateTime.UtcNow,
Stopwatch.GetTimestamp(),
level,
Thread.CurrentThread.ManagedThreadId,
source ?? string.Empty,
message ?? string.Empty,
tenantId,
tenantName,
userName)
{
Machine = _machineName,
Process = _processName
};
OnWriteEvent(logEntry);
foreach (IEventLogWriter logWriter in _eventLogWriters)
{
try
{
logWriter.WriteEntry(logEntry);
}
catch (Exception ex)
{
// Prevent errors from one writer affecting others.
Trace.TraceError($"An error occured writing a message to a log writer. Writer type {logWriter.GetType().Name}, error {ex}.");
}
}
}
/// <summary>
/// Sets the context data within the logical thread.
/// </summary>
/// <param name="tenantId">The tenant id.</param>
/// <param name="tenantName">Name of the tenant.</param>
/// <param name="userName">Name of the user.</param>
public static void SetContext(long tenantId, string tenantName, string userName)
{
// Set the default request context data in the logical context
_contextData = new DiagnosticsRequestContextData(tenantId, tenantName, userName);
}
/// <summary>
/// Sets the context data within the logical thread.
/// </summary>
/// <param name="contextData">The context data.</param>
/// <remarks></remarks>
public static void SetContext(DiagnosticsRequestContextData contextData)
{
_contextData = contextData;
}
/// <summary>
/// Frees the request data from the logical thread.
/// </summary>
public static void FreeContext()
{
// Free the request context data from the logical context
_contextData = null;
}