/// <summary>
/// Returns a page of errors from the database in descending order
/// of logged time.
/// </summary>
public override int GetErrors(int pageIndex, int pageSize, IList errorEntryList)
{
if (pageIndex < 0)
{
throw new ArgumentOutOfRangeException("pageIndex", pageIndex, null);
}
if (pageSize < 0)
{
throw new ArgumentOutOfRangeException("pageSize", pageSize, null);
}
// Skip is not allowed, so we will take extra records and then discard ones that weren't requested.
// This obviously has a performance hit, but since users are usually looking at the latest ones, this may be OK for most scenarios.
var partitionKey = AzureHelper.EncodeAzureKey(ApplicationName);
var tableQuery = _cloudTable.CreateQuery <ElmahEntity>()
.Where(e => e.PartitionKey == partitionKey)
.Take((pageIndex + 1) * pageSize);
var errorEntities = _cloudTable
.ExecuteQuery(tableQuery as TableQuery <ElmahEntity>)
.Skip(pageIndex * pageSize);
foreach (var errorEntity in errorEntities)
{
var error = ErrorXml.DecodeString(errorEntity.AllXml);
errorEntryList.Add(new ErrorLogEntry(this, errorEntity.RowKey, error));
}
// Azure Table Storage cannot return the total number of records,
// so if the max number of errors are displayed,
// we will report an extra element to indicate to the user that more records may exist
return(errorEntryList.Count == pageSize
? (pageIndex + 1) * pageSize + 1
: pageIndex *pageSize + errorEntryList.Count);
}
/// <summary>
/// Returns the specified error from the database, or null
/// if it does not exist.
/// </summary>
public override ErrorLogEntry GetError(string id)
{
if (id == null)
{
throw new ArgumentNullException("id");
}
if (id.Length == 0)
{
throw new ArgumentException(null, "id");
}
var partitionKey = AzureHelper.EncodeAzureKey(ApplicationName);
var elmahEntity = _cloudTable.CreateQuery <ElmahEntity>()
.Where(e => e.PartitionKey == partitionKey && e.RowKey == id)
.ToList()
.First();
var error = ErrorXml.DecodeString(elmahEntity.AllXml);
return(new ErrorLogEntry(this, id, error));
}
public ElmahEntity(string applicationName)
: base(AzureHelper.EncodeAzureKey(applicationName), (DateTime.MaxValue.Ticks - DateTime.UtcNow.Ticks).ToString("d19"))
{
}
