/// <summary>
/// Initializes a new instance of the <see cref="ErrorLogEntry"/> class
/// for a given unique error entry in an error log.
/// </summary>
public ErrorLogEntry(ErrorLog log, string id, Error error)
{
if (log == null)
throw new ArgumentNullException("log");
if (id == null)
throw new ArgumentNullException("id");
if (id.Length == 0)
throw new ArgumentException(null, "id");
if (error == null)
throw new ArgumentNullException("error");
_log = log;
_id = id;
_error = error;
}
/// <summary>
/// Initializes a new instance of the
/// <see cref="ErrorLogDataSourceAdapter"/> class with the default
/// error log implementation.
/// </summary>
public ErrorLogDataSourceAdapter()
{
_log = ErrorLog.GetDefault(HttpContext.Current);
}
public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData)
{
if (context == null)
throw new ArgumentNullException("context");
if (_result != null)
throw new InvalidOperationException("An asynchronous operation is already pending.");
HttpRequest request = context.Request;
NameValueCollection query = request.QueryString;
//
// Limit the download by some maximum # of records?
//
_maxDownloadCount = Math.Max(0, Convert.ToInt32(query["limit"], CultureInfo.InvariantCulture));
//
// Determine the desired output format.
//
string format = Mask.EmptyString(query["format"], "csv").ToLower(CultureInfo.InvariantCulture);
switch (format)
{
case "csv": _format = new CsvFormat(context); break;
case "jsonp": _format = new JsonPaddingFormat(context); break;
case "html-jsonp": _format = new JsonPaddingFormat(context, /* wrapped */ true); break;
default:
throw new Exception("Request log format is not supported.");
}
Debug.Assert(_format != null);
//
// Emit format header, initialize and then fetch results.
//
context.Response.BufferOutput = false;
_format.Header();
AsyncResult result = _result = new AsyncResult(extraData);
_log = ErrorLog.GetDefault(context);
_pageIndex = 0;
_lastBeatTime = DateTime.Now;
_context = context;
_callback = cb;
_errorEntryList = new ArrayList(_pageSize);
_log.BeginGetErrors(_pageIndex, _pageSize, _errorEntryList,
new AsyncCallback(GetErrorsCallback), null);
return result;
}
public void EndProcessRequest(IAsyncResult result)
{
if (result == null)
throw new ArgumentNullException("result");
if (result != _result)
throw new ArgumentException(null, "result");
_result = null;
_log = null;
_context = null;
_callback = null;
_errorEntryList = null;
((AsyncResult) result).End();
}
