public string Create(LoggingEvent loggingEvent)
{
var data = new Dictionary<string, object>();
data["level"] = loggingEvent.Level.ToString();
data["machine"] = Environment.MachineName;
data["message"] = loggingEvent.RenderedMessage;
data["timestamp"] = ConvertDateTime(loggingEvent.TimeStamp);
data["thread"] = loggingEvent.ThreadName;
data["logger"] = loggingEvent.LoggerName;
if (loggingEvent.LocationInformation != null)
{
data["file"] = loggingEvent.LocationInformation.FileName;
data["line"] = loggingEvent.LocationInformation.LineNumber;
data["method"] = loggingEvent.LocationInformation.MethodName;
data["class"] = loggingEvent.LocationInformation.ClassName;
}
var exceptionString = loggingEvent.GetExceptionStrRep();
if (!string.IsNullOrEmpty(exceptionString))
{
data["exception"] = exceptionString;
}
AddHttpUrl(data);
AddHttpUser(data);
AddHttpUrlReferrer(data);
return _serializer.Serialize(data);
}
/// <summary>
/// Appends a <paramref name="loggingEvent"/> to the buffer.
/// </summary>
/// <param name="loggingEvent">The event to append to the buffer.</param>
/// <param name="discardedLoggingEvent">The event discarded from the buffer, if any.</param>
/// <returns><c>true</c> if the buffer is not full, otherwise <c>false</c>.</returns>
public bool Append(LoggingEvent loggingEvent, out LoggingEvent discardedLoggingEvent)
{
discardedLoggingEvent = null;
if (loggingEvent == null)
{
throw new ArgumentNullException("loggingEvent");
}
lock(this)
{
// save the discarded event
discardedLoggingEvent = m_ea[m_last];
// overwrite the last event position
m_ea[m_last] = loggingEvent;
if (++m_last == m_maxSize)
{
m_last = 0;
}
if (m_numElems < m_maxSize)
{
m_numElems++;
}
else if (++m_first == m_maxSize)
{
m_first = 0;
}
return (m_numElems < m_maxSize);
}
}
public override FilterDecision Decide(LoggingEvent loggingEvent)
{
if (loggingEvent == null)
throw new ArgumentNullException("loggingEvent");
var exceptionMessage = loggingEvent.GetExceptionStrRep();
if (string.IsNullOrEmpty(exceptionMessage))
{
return FilterDecision.NEUTRAL;
}
if (RegexToMatch != null)
{
var regex = new Regex(RegexToMatch, RegexOptions.Multiline);
if (!regex.Match(exceptionMessage).Success)
return FilterDecision.NEUTRAL;
return AcceptOnMatch ? FilterDecision.ACCEPT : FilterDecision.DENY;
}
if (StringToMatch == null || exceptionMessage.IndexOf(StringToMatch) == -1)
{
return FilterDecision.NEUTRAL;
}
return AcceptOnMatch ? FilterDecision.ACCEPT : FilterDecision.DENY;
}
protected override void Append(LoggingEvent loggingEvent)
{
byte[] bodyBytes;
try
{
var bodyString = BodyFormatter.Create(loggingEvent);
bodyBytes = Encoding.UTF8.GetBytes(bodyString);
}
catch (Exception e)
{
ErrorHandler.Error("Failed creating JSON", e);
return;
}
var request = (HttpWebRequest)WebRequest.Create(Url);
request.Method = "POST";
request.ContentType = BodyFormatter.ContentType;
request.BeginGetRequestStream(r =>
{
try
{
var stream = request.EndGetRequestStream(r);
stream.BeginWrite(bodyBytes, 0, bodyBytes.Length, c =>
{
try
{
stream.Dispose();
request.BeginGetResponse(a =>
{
try
{
request.EndGetResponse(a);
}
catch (Exception e)
{
ErrorHandler.Error(
"Failed to get response",
e);
}
}, null);
stream.EndWrite(c);
}
catch (Exception e)
{
ErrorHandler.Error("Failed to write", e);
}
}, null);
}
catch (Exception e)
{
ErrorHandler.Error("Failed to connect", e);
}
}, null);
}
/// <summary>
/// This method is called by the <see cref="AppenderSkeleton.DoAppend"/>
/// method.
/// </summary>
/// <param name="loggingEvent">The event to log.</param>
override protected void Append(LoggingEvent loggingEvent)
{
// Pass the logging event on the the attached appenders
if (m_aai != null)
{
m_aai.AppendLoopOnAppenders(loggingEvent);
}
}
/// <summary>
/// Gets the exception text from the logging event
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>the formatted string</returns>
override public string Format(LoggingEvent loggingEvent)
{
if (loggingEvent == null)
{
throw new ArgumentNullException("loggingEvent");
}
return loggingEvent.GetExceptionStrRep();
}
/// <summary>
/// Initializes a new instance of the <see cref="CyclicBuffer" /> class with
/// the specified maximum number of buffered logging events.
/// </summary>
/// <param name="maxSize">The maximum number of logging events in the buffer.</param>
/// <exception cref="ArgumentOutOfRangeException">The <paramref name="maxSize"/> argument is not a positive integer.</exception>
public CyclicBuffer(int maxSize)
{
if (maxSize < 1)
{
throw new ArgumentOutOfRangeException("Parameter: maxSize, Value: [" + maxSize + "] out of range. Non zero positive integer required");
}
m_maxSize = maxSize;
m_ea = new LoggingEvent[maxSize];
m_first = 0;
m_last = 0;
m_numElems = 0;
}
public override FilterDecision Decide(LoggingEvent loggingEvent)
{
if (loggingEvent == null)
{
throw new ArgumentNullException("loggingEvent");
}
var loggingEventData = loggingEvent.GetLoggingEventData();
if (loggingEventData.ExceptionString != null && loggingEventData.ExceptionString.Contains(FilterValue))
{
return FilterDecision.DENY;
}
return FilterDecision.NEUTRAL;
}
/// <summary>
/// Send the contents of the buffer to the remote sink.
/// </summary>
/// <param name="events">The events to send.</param>
override protected void SendBuffer(LoggingEvent[] events)
{
string hostName = SystemInfo.HostName;
// Set the hostname
foreach(LoggingEvent e in events)
{
if (e.Properties[LoggingEvent.HostNameProperty] == null)
{
e.Properties[LoggingEvent.HostNameProperty] = hostName;
}
}
// Send the events
m_sinkObj.LogEvents(events);
}
/// <summary>
/// Actual writing occurs here.
/// <para>Most subclasses of <see cref="AppenderSkeleton"/> will need to
/// override this method.</para>
/// </summary>
/// <param name="loggingEvent">the event to log</param>
override protected void Append(LoggingEvent loggingEvent)
{
// check if log4net is running in the context of an ASP.NET application
if (HttpContext.Current != null)
{
// check if tracing is enabled for the current context
if (HttpContext.Current.Trace.IsEnabled)
{
if (loggingEvent.Level >= Level.WARN)
{
HttpContext.Current.Trace.Warn(loggingEvent.LoggerName, RenderLoggingEvent(loggingEvent));
}
else
{
HttpContext.Current.Trace.Write(loggingEvent.LoggerName, RenderLoggingEvent(loggingEvent));
}
}
}
}
/// <summary>
/// A template method for formatting in a converter specific way.
/// </summary>
/// <param name="buffer"><see cref="StringBuilder" /> that will receive the formatted result.</param>
/// <param name="loggingEvent">The <see cref="LoggingEvent" /> on which the pattern converter should be executed.</param>
virtual public void Format(StringBuilder buffer, LoggingEvent loggingEvent)
{
string s = Convert(loggingEvent);
if (s == null)
{
if (0 < m_min)
{
SpacePad(buffer, m_min);
}
return;
}
int len = s.Length;
if (len > m_max)
{
buffer.Append(s.Substring(len - m_max));
}
else if (len < m_min)
{
if (m_leftAlign)
{
buffer.Append(s);
SpacePad(buffer, m_min - len);
}
else
{
SpacePad(buffer, m_min - len);
buffer.Append(s);
}
}
else
{
buffer.Append(s);
}
}
/// <summary>
/// Calls the <see cref="IAppender.DoAppend" /> method on all
/// attached appenders.
/// </summary>
/// <param name="loggingEvent">The event being logged.</param>
/// <returns>The number of appenders called.</returns>
public int AppendLoopOnAppenders(LoggingEvent loggingEvent)
{
if (loggingEvent == null)
{
throw new ArgumentNullException("loggingEvent");
}
if (m_appenderList == null)
{
return 0;
}
foreach(IAppender appender in m_appenderList)
{
try
{
appender.DoAppend(loggingEvent);
}
catch(Exception ex)
{
LogLog.Error("AppenderAttachedImpl: Failed to append to appender [" + appender.Name + "]", ex);
}
}
return m_appenderList.Count;
}
/// <summary> /// Overridden by subclasses to get the fully qualified name before the /// precision is applied to it. /// </summary> /// <param name="loggingEvent">the event being logged</param> /// <returns>the fully qualified name</returns> abstract protected string GetFullyQualifiedName(LoggingEvent loggingEvent);
/// <summary>
/// Convert the pattern to the rendered message
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>the relevant location information</returns>
override protected string Convert(LoggingEvent loggingEvent)
{
LocationInfo locationInfo = loggingEvent.LocationInformation;
switch(m_type)
{
case FULL_LOCATION_CONVERTER:
return locationInfo.FullInfo;
case METHOD_LOCATION_CONVERTER:
return locationInfo.MethodName;
case LINE_LOCATION_CONVERTER:
return locationInfo.LineNumber;
case FILE_LOCATION_CONVERTER:
return locationInfo.FileName;
default:
return null;
}
}
/// <summary>
/// Convert the pattern into the rendered message
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns></returns>
override protected string Convert(LoggingEvent loggingEvent)
{
m_date = loggingEvent.TimeStamp;
string converted = null;
try
{
converted = m_df.FormatDate(m_date, new StringBuilder()).ToString();
}
catch (Exception ex)
{
LogLog.Error("PatternParser: Error occurred while converting date.", ex);
}
return converted;
}
/// <summary>
/// To the conversion
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>the result of converting the pattern</returns>
override protected string Convert(LoggingEvent loggingEvent)
{
object prop = loggingEvent.Properties[m_key];
if (prop != null)
{
return prop.ToString();
}
return null;
}
/// <summary>
/// To the conversion
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>the result of converting the pattern</returns>
override protected string Convert(LoggingEvent loggingEvent)
{
return loggingEvent.LookupMappedContext(m_key);
}
/// <summary>
/// Check if this filter should allow the event to be logged
/// </summary>
/// <remarks>
/// The <see cref="MDC"/> is matched against the <see cref="StringToMatch"/>.
/// If the <see cref="StringToMatch"/> occurs as a substring within
/// the message then a match will have occurred. If no match occurs
/// this function will return <see cref="FilterDecision.NEUTRAL"/>
/// allowing other filters to check the event. If a match occurs then
/// the value of <see cref="AcceptOnMatch"/> is checked. If it is
/// true then <see cref="FilterDecision.ACCEPT"/> is returned otherwise
/// <see cref="FilterDecision.DENY"/> is returned.
/// </remarks>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>see remarks</returns>
override public FilterDecision Decide(LoggingEvent loggingEvent)
{
if (loggingEvent == null)
{
throw new ArgumentNullException("loggingEvent");
}
// Check if we have a key to lookup the MDC value with
if (m_key == null)
{
// We cannot filter so allow the filter chain
// to continue processing
return FilterDecision.NEUTRAL;
}
// Lookup the string to match in from the MDC using
// the key specified.
string msg = loggingEvent.LookupMappedContext(m_key);
// Check if we have been setup to filter
if (msg == null || (m_stringToMatch == null && m_regexToMatch == null))
{
// We cannot filter so allow the filter chain
// to continue processing
return FilterDecision.NEUTRAL;
}
// Firstly check if we are matching using a regex
if (m_regexToMatch != null)
{
// Check the regex
if (m_regexToMatch.Match(msg).Success == false)
{
// No match, continue processing
return FilterDecision.NEUTRAL;
}
// we've got a match
if (m_acceptOnMatch)
{
return FilterDecision.ACCEPT;
}
return FilterDecision.DENY;
}
else if (m_stringToMatch != null)
{
// Check substring match
if (msg.IndexOf(m_stringToMatch) == -1)
{
// No match, continue processing
return FilterDecision.NEUTRAL;
}
// we've got a match
if (m_acceptOnMatch)
{
return FilterDecision.ACCEPT;
}
return FilterDecision.DENY;
}
return FilterDecision.NEUTRAL;
}
/// <summary>
/// Gets the fully qualified name of the logger
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>the logger name</returns>
override protected string GetFullyQualifiedName(LoggingEvent loggingEvent)
{
return loggingEvent.LoggerName;
}
/// <summary>
/// Sends the given log event to Common.Logging
/// </summary>
/// <param name="loggingEvent">
/// The logging Event.
/// </param>
protected override void Append(LoggingEvent loggingEvent)
{
var logger = LogManager.GetLogger(loggingEvent.LoggerName);
var closestLevel = GetClosestLevel(loggingEvent.Level);
var logMethod = logMethods[closestLevel];
loggingEvent.Fix = FixFlags.LocationInfo;
// Using reflection to get the exception for this logging event for old version of log4net that is wrapped by Sitecore.Logging
// New versions of log4net expose the exception
var exception = loggingEvent.GetPrivatePropertyValue<Exception>("m_thrownException");
logMethod(logger, () => this.RenderLoggingEvent(loggingEvent), exception);
}
protected override void Append(log4net.spi.LoggingEvent loggingEvent)
{
try
{
// We are not checking LogLevel -- That has been added at FilterLevel
// in Configuration
// Thanks : http://sitecoreblog.alexshyba.com/2010/07/sitecore-logging-part-3-adding-custom.html#more
if (Sitecore.Context.Site != null)
{
var properties = loggingEvent.Properties;
// By Default Everything comes as a Shell
// So, Here we are string RAW Message parsing it using
// http://blogs.msdn.com/b/simonince/archive/2009/07/09/string-unformat-i-ve-created-a-monster.aspx
// User is perfect!
if (Sitecore.Context.User != null)
{
properties["scuser"] = Sitecore.Context.User.Name;
}
if (!string.IsNullOrWhiteSpace(loggingEvent.RenderedMessage))
{
string auditRAWMessage = loggingEvent.RenderedMessage;
object[] ParsedValues = AuditUnformatItem(@auditRAWMessage);
if (ParsedValues != null && ParsedValues.Any())
{
// 0 - UserName, 1 - Action, 2 - DatabaseName
// 3 - ItemPath, 4 - Language, 5 - Version, 6 - ItemID
// 7 - Misc e.g. When you rename item you get new item name
// WORKFLOW : 7 - Command, 8 - Previous State
// 9 - Next State, 10 - User
SetPropertyValue(properties, ParsedValues, "scaction", 1);
if (properties["scaction"] != null && !string.IsNullOrWhiteSpace(Convert.ToString(properties["scaction"])) &&
Convert.ToString(properties["scaction"]) == "Restore")
{
return; // We don't process Restore as we don't have all details
}
SetPropertyValue(properties, ParsedValues, "scitemid", 6);
if (ParsedValues.Length > 2)
{
string databaseName = Convert.ToString(ParsedValues.GetValue(2));
if (!string.IsNullOrWhiteSpace(databaseName))
{
Sitecore.Data.Database database =
Sitecore.Configuration.Factory.GetDatabase(databaseName);
if (database != null && properties["scitemid"] != null)
{
Sitecore.Data.Items.Item item =
database.GetItem(Convert.ToString(properties["scitemid"]));
if (item != null)
{
properties["sitename"] = item.GetContextSite().Name;
}
}
}
}
SetPropertyValue(properties, ParsedValues, "scitempath", 3);
SetPropertyValue(properties, ParsedValues, "sclanguage", 4);
SetPropertyValue(properties, ParsedValues, "scversion", 5);
SetPropertyValue(properties, ParsedValues, "scmisc", 7);
// Workflow
SetPropertyValue(properties, ParsedValues, "scmisc", 8, true);
SetPropertyValue(properties, ParsedValues, "scmisc", 9, true);
SetPropertyValue(properties, ParsedValues, "scmisc", 10, true);
}
}
}
base.Append(loggingEvent);
}
catch (Exception ex)
{
Sitecore.Diagnostics.Log.Error("Append method failed to record information", ex, this);
}
}
/// <summary>
/// Resizes the cyclic buffer to <paramref name="newSize"/>.
/// </summary>
/// <param name="newSize">The new size of the buffer.</param>
/// <exception cref="ArgumentOutOfRangeException">The <paramref name="newSize"/> argument is not a positive integer.</exception>
public void Resize(int newSize)
{
lock(this)
{
if (newSize < 0)
{
throw new ArgumentOutOfRangeException("Parameter: newSize, Value: [" + newSize + "] out of range. Non zero positive integer required");
}
if (newSize == m_numElems)
{
return; // nothing to do
}
LoggingEvent[] temp = new LoggingEvent[newSize];
int loopLen = (newSize < m_numElems) ? newSize : m_numElems;
for(int i = 0; i < loopLen; i++)
{
temp[i] = m_ea[m_first];
m_ea[m_first] = null;
if (++m_first == m_numElems)
{
m_first = 0;
}
}
m_ea = temp;
m_first = 0;
m_numElems = loopLen;
m_maxSize = newSize;
if (loopLen == newSize)
{
m_last = 0;
}
else
{
m_last = loopLen;
}
}
}
/// <summary>
/// Pops all the logging events from the buffer into an array.
/// </summary>
/// <returns>An array of all the logging events in the buffer.</returns>
public LoggingEvent[] PopAll()
{
lock(this)
{
LoggingEvent[] ret = new LoggingEvent[m_numElems];
if (m_numElems > 0)
{
if (m_first < m_last)
{
Array.Copy(m_ea, m_first, ret, 0, m_numElems);
}
else
{
Array.Copy(m_ea, m_first, ret, 0, m_maxSize - m_first);
Array.Copy(m_ea, 0, ret, m_maxSize - m_first, m_last);
}
}
// Set all the elements to null
Array.Clear(m_ea, 0, m_ea.Length);
m_first = 0;
m_last = 0;
m_numElems = 0;
return ret;
}
}
/// <summary>
/// Convert the pattern to the rendered message
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>the precision of the fully qualified name specified</returns>
override protected string Convert(LoggingEvent loggingEvent)
{
string n = GetFullyQualifiedName(loggingEvent);
if (m_precision <= 0)
{
return n;
}
else
{
int len = n.Length;
// We subtract 1 from 'len' when assigning to 'end' to avoid out of
// bounds exception in return r.substring(end+1, len). This can happen if
// precision is 1 and the logger name ends with a dot.
int end = len -1 ;
for(int i = m_precision; i > 0; i--)
{
end = n.LastIndexOf('.', end-1);
if (end == -1)
{
return n;
}
}
return n.Substring(end+1, len-end-1);
}
}
/// <summary>
/// Override the formatting behaviour to ignore the FormattingInfo
/// because we have a literal instead.
/// </summary>
/// <param name="buffer">the builder to write to</param>
/// <param name="loggingEvent">the event being logged</param>
override public void Format(StringBuilder buffer, LoggingEvent loggingEvent)
{
buffer.Append(m_literal);
}
/// <summary>
/// Gets the fully qualified name of the class
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>the class name</returns>
override protected string GetFullyQualifiedName(LoggingEvent loggingEvent)
{
return loggingEvent.LocationInformation.ClassName;
}
/// <summary>
/// Convert this pattern into the rendered message
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>the literal</returns>
override protected string Convert(LoggingEvent loggingEvent)
{
return m_literal;
}
/// <summary>
/// Check if this filter should allow the event to be logged
/// </summary>
/// <remarks>
/// The rendered message is matched against the <see cref="StringToMatch"/>.
/// If the <see cref="StringToMatch"/> occurs as a substring within
/// the message then a match will have occurred. If no match occurs
/// this function will return <see cref="FilterDecision.NEUTRAL"/>
/// allowing other filters to check the event. If a match occurs then
/// the value of <see cref="AcceptOnMatch"/> is checked. If it is
/// true then <see cref="FilterDecision.ACCEPT"/> is returned otherwise
/// <see cref="FilterDecision.DENY"/> is returned.
/// </remarks>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>see remarks</returns>
override public FilterDecision Decide(LoggingEvent loggingEvent)
{
if (loggingEvent == null)
{
throw new ArgumentNullException("loggingEvent");
}
string msg = loggingEvent.RenderedMessage;
// Check if we have been setup to filter
if (msg == null || (m_stringToMatch == null && m_regexToMatch == null))
{
// We cannot filter so allow the filter chain
// to continue processing
return FilterDecision.NEUTRAL;
}
// Firstly check if we are matching using a regex
if (m_regexToMatch != null)
{
// Check the regex
if (m_regexToMatch.Match(msg).Success == false)
{
// No match, continue processing
return FilterDecision.NEUTRAL;
}
// we've got a match
if (m_acceptOnMatch)
{
return FilterDecision.ACCEPT;
}
return FilterDecision.DENY;
}
else if (m_stringToMatch != null)
{
// Check substring match
if (msg.IndexOf(m_stringToMatch) == -1)
{
// No match, continue processing
return FilterDecision.NEUTRAL;
}
// we've got a match
if (m_acceptOnMatch)
{
return FilterDecision.ACCEPT;
}
return FilterDecision.DENY;
}
return FilterDecision.NEUTRAL;
}
/// <summary>
/// Sends the contents of the cyclic buffer as an e-mail message.
/// </summary>
/// <param name="events">The logging events to send.</param>
override protected void SendBuffer(LoggingEvent[] events)
{
// Note: this code already owns the monitor for this
// appender. This frees us from needing to synchronize on 'cb'.
try
{
StringBuilder sbuf = new StringBuilder();
string t = Layout.Header;
if (t != null)
{
sbuf.Append(t);
}
string hostName = SystemInfo.HostName;
for(int i = 0; i < events.Length; i++)
{
// Set the hostname property
if (events[i].Properties[LoggingEvent.HostNameProperty] == null)
{
events[i].Properties[LoggingEvent.HostNameProperty] = hostName;
}
// Render the event and append the text to the buffer
sbuf.Append(RenderLoggingEvent(events[i]));
}
t = Layout.Footer;
if (t != null)
{
sbuf.Append(t);
}
MailMessage mailMessage = new MailMessage();
mailMessage.Body = sbuf.ToString();
mailMessage.From = m_from;
mailMessage.To = m_to;
mailMessage.Subject = m_subject;
if (m_smtpHost != null && m_smtpHost.Length > 0)
{
SmtpMail.SmtpServer = m_smtpHost;
}
SmtpMail.Send(mailMessage);
}
catch(Exception e)
{
ErrorHandler.Error("Error occurred while sending e-mail notification.", e);
}
}
/// <summary>
/// The format.
/// </summary>
/// <param name="loggingEvent">
/// The logging event.
/// </param>
/// <returns>
/// The <see cref="string"/>.
/// </returns>
public string Format(LoggingEvent loggingEvent)
{
return this.InnerLayout.Format(loggingEvent);
}
/// <summary>
/// To the conversion
/// </summary>
/// <param name="loggingEvent">the event being logged</param>
/// <returns>the result of converting the pattern</returns>
override protected string Convert(LoggingEvent loggingEvent)
{
switch(m_type)
{
case RELATIVE_TIME_CONVERTER:
return TimeDifferenceInMillis(LoggingEvent.StartTime, loggingEvent.TimeStamp).ToString(System.Globalization.NumberFormatInfo.InvariantInfo);
case THREAD_CONVERTER:
return loggingEvent.ThreadName;
case LEVEL_CONVERTER:
return loggingEvent.Level.ToString();
case NDC_CONVERTER:
return loggingEvent.NestedContext;
case MESSAGE_CONVERTER:
return loggingEvent.RenderedMessage;
case USERNAME_CONVERTER:
return loggingEvent.UserName;
case IDENTITY_CONVERTER:
return loggingEvent.Identity;
case APPDOMAIN_CONVERTER:
return loggingEvent.Domain;
default:
return null;
}
}
