public PagedList<Log> SearchLogs(LogSearchCriteria criteria)
{
if (criteria == null)
throw new ApplicationException("Search criteria is null.");
using (var context = GetContext())
{
IQueryable<Log> query = from log in context.Logs
join cl in context.CategoryLogs on log.LogId equals cl.LogId
join c in context.Categories on cl.CategoryId equals c.CategoryId
where c.CategoryName == criteria.Category
select log;
if (criteria.DateFrom != null)
query = query.Where(l => l.TimestampUtc >= criteria.DateFrom);
if (criteria.DateTo != null)
query = query.Where(l => l.TimestampUtc <= criteria.DateTo);
if (!string.IsNullOrEmpty(criteria.Title))
query = query.Where(l => l.Title == criteria.Title);
if (criteria.Severity > 0)
{
List<string> severities = new List<string>();
if ((criteria.Severity & (int)TraceEventType.Critical) != 0)
severities.Add(TraceEventType.Critical.ToString());
if ((criteria.Severity & (int)TraceEventType.Error) != 0)
severities.Add(TraceEventType.Error.ToString());
if ((criteria.Severity & (int)TraceEventType.Warning) != 0)
severities.Add(TraceEventType.Warning.ToString());
if ((criteria.Severity & (int)TraceEventType.Information) != 0)
severities.Add(TraceEventType.Information.ToString());
query = query.Where(l => severities.Contains(l.SeverityName));
}
query = query.SortBy(criteria.SortBy, criteria.SortByDesc);
PagedList<int> logViewIds = new PagedList<int>(query.Select(l => l.LogId), criteria.StartIndex, criteria.PageSize);
IQueryable<Log> secondQuery = context.Logs.Where(l => logViewIds.Contains(l.LogId));
Dictionary<int, Log> logs = (criteria.ShouldIncludeMessage
? secondQuery.Select(l => new LogToView
{
LogId = l.LogId,
TimestampUtc = l.TimestampUtc,
Message = l.FormattedMessage
})
: secondQuery.Select(l => new LogToView
{
LogId = l.LogId,
SeverityName = l.SeverityName,
Title = l.Title,
TimestampUtc = l.TimestampUtc,
Message = l.Message.Substring(0, criteria.MessageLength)
})).ToDictionary(l => l.LogId, l => (Log)l);
return logViewIds.Transform<Log>(id => logs[id]);
}
}
public int ExportLogs(string categoryName, DateTime? from, DateTime? to, bool shouldDeleteFromDb, string outputPath, CancellationTokenSource cancellationTokenSource)
{
const string exportFileNameFormat = "DIS_{0}_{1:yyyy-MM-dd}_{2:yyyy-MM-dd}.xml";
LogSearchCriteria criteria = new LogSearchCriteria() {
Category = categoryName,
Severity = int.MaxValue,
DateFrom = from,
DateTo = to,
PageSize = MessageLogger.LogsPerFile,
SortBy = "TimestampUtc",
SortByDesc = false,
ShouldIncludeMessage = true
};
int total = 0;
int currentPage = 1;
PagedList<Log> logs = null;
try {
while (cancellationTokenSource == null || !cancellationTokenSource.IsCancellationRequested) {
criteria.PageNumber = currentPage++;
logs = SearchLogs(criteria);
if (logs.Count == 0)
break;
total += logs.Count;
SplitAndWriteLogs(categoryName, outputPath, exportFileNameFormat, logs);
if (shouldDeleteFromDb)
logRepository.DeleteLogs(logs);
if (currentPage > logs.PageCount)
break;
}
}
catch (UnauthorizedAccessException) {
throw new DisException("Exception_PermissionsMsg");
}
return total;
}
public PagedList<Log> GetSystemLogs(int severity, DateTime? from, DateTime? to, int pageNumber, int pageSize, string sortBy, bool sortByDesc)
{
if (severity == 0)
return new PagedList<Log>(new List<Log>().AsQueryable(), 0, pageSize);
LogSearchCriteria criteria = new LogSearchCriteria() {
Category = MessageLogger.SystemCategoryName,
Severity = severity,
DateFrom = from,
DateTo = to,
PageSize = pageSize,
PageNumber = pageNumber,
ShouldIncludeMessage = false
};
if (!string.IsNullOrEmpty(sortBy)) {
criteria.SortBy = sortBy;
criteria.SortByDesc = sortByDesc;
}
return SearchLogs(criteria);
}
private PagedList<Log> SearchLogs(LogSearchCriteria criteria)
{
if (criteria == null)
throw new ApplicationException("Search criteria is null.");
if (criteria.DateFrom != null)
criteria.DateFrom = criteria.DateFrom.Value.ToUniversalTime();
if (criteria.DateTo != null)
criteria.DateTo = criteria.DateTo.Value.Date.AddDays(1).ToUniversalTime();
if (criteria.PageSize < 0)
criteria.PageSize = LogSearchCriteria.DefaultPageSize;
else if (criteria.PageSize == 0)
criteria.PageSize = int.MaxValue;
return logRepository.SearchLogs(criteria);
}
public PagedList<Log> GetOperationLogs(string userName, DateTime? from, DateTime? to, int pageNumber, int pageSize, string sortBy, bool sortByDesc)
{
LogSearchCriteria criteria = new LogSearchCriteria() {
Category = MessageLogger.OperationCategoryName,
Severity = (int)TraceEventType.Information,
UserName = userName,
DateFrom = from,
DateTo = to,
PageSize = pageSize,
PageNumber = pageNumber,
ShouldIncludeMessage = false
};
if (!string.IsNullOrEmpty(sortBy)) {
criteria.SortBy = sortBy;
criteria.SortByDesc = sortByDesc;
}
return SearchLogs(criteria);
}