//
// System.Diagnostics.EventLogImpl.cs
//
// Authors:
// Andreas Nahr (ClassDevelopment@A-SoftTech.com)
// Atsushi Enomoto <atsushi@ximian.com>
// Gert Driesen (drieseng@users.sourceforge.net)
//
// (C) 2003 Andreas Nahr
// (C) 2006 Novell, Inc.
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Diagnostics;
using System.Globalization;
using Microsoft.Win32;
namespace System.Diagnostics{
internal abstract class EventLogImpl
{
readonly EventLog _coreEventLog;
protected EventLogImpl (EventLog coreEventLog)
{
_coreEventLog = coreEventLog;
}
protected EventLog CoreEventLog {
get { return _coreEventLog; }
}
public int EntryCount {
get {
if (_coreEventLog.Log == null || _coreEventLog.Log.Length == 0) {
throw new ArgumentException ("Log property is not set.");
}
if (!EventLog.Exists (_coreEventLog.Log, _coreEventLog.MachineName)) {
throw new InvalidOperationException (string.Format (
CultureInfo.InvariantCulture, "The event log '{0}' on "
+ " computer '{1}' does not exist.", _coreEventLog.Log,
_coreEventLog.MachineName));
}
return GetEntryCount ();
}
}
public EventLogEntry this[int index] {
get {
if (_coreEventLog.Log == null || _coreEventLog.Log.Length == 0) {
throw new ArgumentException ("Log property is not set.");
}
if (!EventLog.Exists (_coreEventLog.Log, _coreEventLog.MachineName)) {
throw new InvalidOperationException (string.Format (
CultureInfo.InvariantCulture, "The event log '{0}' on "
+ " computer '{1}' does not exist.", _coreEventLog.Log,
_coreEventLog.MachineName));
}
if (index < 0 || index >= EntryCount)
throw new ArgumentException ("Index out of range");
return GetEntry (index);
}
}
public string LogDisplayName {
get {
#if NET_2_0
// to-do perform valid character checks
if (_coreEventLog.Log != null && _coreEventLog.Log.Length == 0) {
throw new InvalidOperationException ("Event log names must"
+ " consist of printable characters and cannot contain"
+ " \\, *, ?, or spaces.");
}
#endif
if (_coreEventLog.Log != null) {
if (_coreEventLog.Log.Length == 0)
return string.Empty;
if (!EventLog.Exists (_coreEventLog.Log, _coreEventLog.MachineName)) {
throw new InvalidOperationException (string.Format (
CultureInfo.InvariantCulture, "Cannot find Log {0}"
+ " on computer {1}.", _coreEventLog.Log,
_coreEventLog.MachineName));
}
}
return GetLogDisplayName ();
}
}
public EventLogEntry [] GetEntries ()
{
string logName = CoreEventLog.Log;
if (logName == null || logName.Length == 0)
throw new ArgumentException ("Log property value has not been specified.");
if (!EventLog.Exists (logName))
throw new InvalidOperationException (string.Format (
CultureInfo.InvariantCulture, "The event log '{0}' on "
+ " computer '{1}' does not exist.", logName,
_coreEventLog.MachineName));
int entryCount = GetEntryCount ();
EventLogEntry [] entries = new EventLogEntry [entryCount];
for (int i = 0; i < entryCount; i++) {
entries [i] = GetEntry (i);
}
return entries;
}
public abstract void DisableNotification ();
public abstract void EnableNotification ();
public abstract void BeginInit ();
public abstract void Clear ();
public abstract void Close ();
public abstract void CreateEventSource (EventSourceCreationData sourceData);
public abstract void Delete (string logName, string machineName);
public abstract void DeleteEventSource (string source, string machineName);
public abstract void Dispose (bool disposing);
public abstract void EndInit ();
public abstract bool Exists (string logName, string machineName);
protected abstract int GetEntryCount ();
protected abstract EventLogEntry GetEntry (int index);
public EventLog [] GetEventLogs (string machineName)
{
string [] logNames = GetLogNames (machineName);
EventLog [] eventLogs = new EventLog [logNames.Length];
for (int i = 0; i < logNames.Length; i++) {
EventLog eventLog = new EventLog (logNames [i], machineName);
eventLogs [i] = eventLog;
}
return eventLogs;
}
protected abstract string GetLogDisplayName ();
public abstract string LogNameFromSourceName (string source, string machineName);
public abstract bool SourceExists (string source, string machineName);
public abstract void WriteEntry (string [] replacementStrings, EventLogEntryType type, uint instanceID, short category, byte[] rawData);
protected abstract string FormatMessage (string source, uint messageID, string [] replacementStrings);
protected abstract string [] GetLogNames (string machineName);
protected void ValidateCustomerLogName (string logName, string machineName)
{
if (logName.Length >= 8) {
string significantName = logName.Substring (0, 8);
if (string.Compare (significantName, "AppEvent", true) == 0 || string.Compare (significantName, "SysEvent", true) == 0 || string.Compare (significantName, "SecEvent", true) == 0)
throw new ArgumentException (string.Format (
CultureInfo.InvariantCulture, "The log name: '{0}' is"
+ " invalid for customer log creation.", logName));
// the first 8 characters of the log name are used as filename
// for .evt file and as such no two logs with 8 characters or
// more should have the same first 8 characters (or the .evt
// would be overwritten)
//
// this check is not strictly necessary on unix
string [] logs = GetLogNames (machineName);
for (int i = 0; i < logs.Length; i++) {
string log = logs [i];
if (log.Length >= 8 && string.Compare (log, 0, significantName, 0, 8, true) == 0)
throw new ArgumentException (string.Format (
CultureInfo.InvariantCulture, "Only the first eight"
+ " characters of a custom log name are significant,"
+ " and there is already another log on the system"
+ " using the first eight characters of the name given."
+ " Name given: '{0}', name of existing log: '{1}'.",
logName, log));
}
}
// LAMESPEC: check if the log name matches an existing source
// https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=186552
if (SourceExists (logName, machineName)) {
if (machineName == ".")
throw new ArgumentException (string.Format (
CultureInfo.InvariantCulture, "Log {0} has already been"
+ " registered as a source on the local computer.",
logName));
else
throw new ArgumentException (string.Format (
CultureInfo.InvariantCulture, "Log {0} has already been"
+ " registered as a source on the computer {1}.",
logName, machineName));
}
}
#if NET_2_0
public abstract OverflowAction OverflowAction { get; }
public abstract int MinimumRetentionDays { get; }
public abstract long MaximumKilobytes { get; set; }
public abstract void ModifyOverflowPolicy (OverflowAction action, int retentionDays);
public abstract void RegisterDisplayName (string resourceFile, long resourceId);
#endif
}
}
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