/// <summary>
/// Appends a <see cref="SysLogEntry" /> to the event log.
/// </summary>
/// <param name="entry">The log entry.</param>
protected override void Append(SysLogEntry entry)
{
bool createNew;
lock (syncLock)
{
try
{
using (var output = File.AppendText(currentFile))
{
output.WriteLine(entry.ToString(SysLogEntryFormat.ShowAll));
createNew = output.BaseStream.Length >= maxSize;
}
if (createNew)
{
CreateNewFile();
}
}
catch
{
// Absorb any exceptions to avoid impacting the application due to logging issues.
}
}
}
/// <summary>
/// Constructs a logger that caches the log in-memory and flushes
/// the output to the IDE debug output or a file.
/// </summary>
/// <param name="inMemory"><c>true</c> to enable in-memory caching.</param>
/// <param name="format">The log entry format.</param>
/// <param name="fileName">
/// Pass as the file name where log entries are to be appended
/// when Flush() is called or <c>null</c> to append these thes to the
/// IDE debug output.
/// </param>
public DebugSysLogProvider(bool inMemory, SysLogEntryFormat format, string fileName)
: base()
{
this.format = format;
this.inMemory = inMemory;
this.fileName = fileName;
this.head = null;
this.tail = null;
}
/// <summary>
/// Appends a <see cref="SysLogEntry" /> to the event log.
/// </summary>
/// <param name="entry">The log entry.</param>
protected override void Append(SysLogEntry entry)
{
if (altLogProvider != null)
{
altLogProvider.Log(entry);
}
try
{
entry.Time = SysTime.ExternalNow;
Log(entry.SerializeOperation(), entry.SerializeDetails(), entry.Type == SysLogEntryType.Error || entry.Type == SysLogEntryType.Exception || entry.Type == SysLogEntryType.SecurityFailure);
}
catch
{
// Ignore errors
}
}
/// <summary>
/// Logs a <see cref="SysLogEntry" />
/// </summary>
/// <param name="entry">The log entry.</param>
public void Log(SysLogEntry entry)
{
lock (syncLock)
{
foreach (var provider in providers)
{
try
{
provider.Log(entry);
}
catch
{
// Ignore errors.
}
}
}
}
/// <summary>
/// Flushes any cached log information to persistent storage.
/// </summary>
public override void Flush()
{
if (!inMemory)
{
return;
}
lock (syncLock)
{
if (fileName != null)
{
FileStream output;
SysLogEntry entry;
byte[] buf;
output = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.None);
entry = head;
while (entry != null)
{
buf = Encoding.UTF8.GetBytes(entry.ToString(format));
output.Write(buf, 0, buf.Length);
entry = entry.Next;
}
output.Close();
}
else
{
SysLogEntry entry;
entry = head;
while (entry != null)
{
Debug.Write(entry.ToString(format));
entry = entry.Next;
}
}
head = tail = null;
}
}
/// <summary>
/// Appends the log entry passed to the in-memory list if in-memory
/// logging is enabled, otherwise writes the entry to the output.
/// </summary>
/// <param name="entry">The log entry.</param>
protected override void Append(SysLogEntry entry)
{
if (!inMemory)
{
if (fileName == null)
{
Debug.Write(entry.ToString());
}
else
{
lock (syncLock)
{
FileStream output;
byte[] buf;
output = new FileStream(fileName, FileMode.Append, FileAccess.Write, FileShare.None);
buf = Encoding.UTF8.GetBytes(entry.ToString(format));
output.Write(buf, 0, buf.Length);
output.Close();
}
}
return;
}
lock (syncLock)
{
if (head == null)
{
head = tail = entry;
}
else
{
tail.Next = entry;
}
}
}
/// <summary>
/// Appends the log entry passed to the output log.
/// </summary>
/// <param name="entry">The log entry.</param>
protected override void Append(SysLogEntry entry)
{
EventLogEntryType winEventType;
if (appEventLog == null)
{
return;
}
switch (entry.Type)
{
case SysLogEntryType.Information: winEventType = EventLogEntryType.Information; break;
case SysLogEntryType.Warning: winEventType = EventLogEntryType.Warning; break;
case SysLogEntryType.Error: winEventType = EventLogEntryType.Error; break;
case SysLogEntryType.SecuritySuccess: winEventType = EventLogEntryType.SuccessAudit; break;
case SysLogEntryType.SecurityFailure: winEventType = EventLogEntryType.FailureAudit; break;
case SysLogEntryType.Exception: winEventType = EventLogEntryType.Error; break;
case SysLogEntryType.Trace: winEventType = EventLogEntryType.Information; break;
default: winEventType = EventLogEntryType.Information; break;
}
try
{
appEventLog.WriteEntry(entry.ToString(SysLogEntryFormat.ShowExtended), winEventType);
}
catch
{
// The event log can throw an exception when it's full. Ignore these.
}
}
/// <summary>
/// Logs a <see cref="SysLogEntry" />
/// </summary>
/// <param name="entry">The log entry.</param>
public void Log(SysLogEntry entry)
{
Append(entry);
}
/// <summary> /// Appends a <see cref="SysLogEntry" /> to the event log. /// </summary> /// <param name="entry">The log entry.</param> protected abstract void Append(SysLogEntry entry);