private EventLogWatcher CreateWatcher()
{
EventBookmark eventBookmark = this.Bookmarker.Read();
if (eventBookmark != null)
{
this.Trace("Previous bookmark found", new object[0]);
}
else
{
this.Trace("No previous book mark found at the first attempt", new object[0]);
eventBookmark = this.SetBookmarkForLatestFailureItem();
if (eventBookmark != null)
{
this.Trace("Updated the bookmark with the last failure item raised", new object[0]);
}
else
{
this.Trace("There is no bookmark since there are no failure items in the channel", new object[0]);
}
}
bool readExistingEvents = eventBookmark != null;
EventLogQuery eventQuery = FailureItemWatcher.CreateEventLogQueryByDatabaseGuid(this.m_database.Guid);
EventLogWatcher eventLogWatcher = new EventLogWatcher(eventQuery, eventBookmark, readExistingEvents);
eventLogWatcher.EventRecordWritten += this.EventArrivedHandler;
return(eventLogWatcher);
}
private EventBookmark SetBookmarkForLatestFailureItem()
{
EventBookmark eventBookmark = null;
EventLogQuery eventLogQuery = FailureItemWatcher.CreateEventLogQueryByDatabaseGuid(this.m_database.Guid);
eventLogQuery.ReverseDirection = true;
using (EventLogReader eventLogReader = new EventLogReader(eventLogQuery))
{
using (EventRecord eventRecord = eventLogReader.ReadEvent())
{
if (eventRecord != null)
{
DatabaseFailureItem databaseFailureItem = DatabaseFailureItem.Parse(eventRecord);
eventBookmark = databaseFailureItem.Bookmark;
this.Bookmarker.Write(eventBookmark);
}
}
}
return(eventBookmark);
}
internal static DatabaseFailureItem FindMostRecentIdenticalFailureItem(DatabaseFailureItem referenceDbfi, out int countDupliateItems, out EventRecord latestRecord)
{
EventLogQuery eventQuery = FailureItemWatcher.CreateEventLogQueryByDatabaseGuid(referenceDbfi.Guid);
DatabaseFailureItem result;
using (EventLogReader eventLogReader = new EventLogReader(eventQuery, referenceDbfi.Bookmark))
{
latestRecord = null;
DatabaseFailureItem databaseFailureItem = null;
countDupliateItems = 0;
for (;;)
{
EventRecord eventRecord2;
EventRecord eventRecord = eventRecord2 = eventLogReader.ReadEvent();
try
{
if (eventRecord != null)
{
DatabaseFailureItem databaseFailureItem2 = DatabaseFailureItem.Parse(eventRecord);
if (referenceDbfi.Equals(databaseFailureItem2))
{
databaseFailureItem = databaseFailureItem2;
latestRecord = eventRecord;
countDupliateItems++;
continue;
}
}
}
finally
{
if (eventRecord2 != null)
{
((IDisposable)eventRecord2).Dispose();
}
}
break;
}
result = databaseFailureItem;
}
return(result);
}