} // end of GenerateSlowSqlSingleRow function
// Generates INSERT statement for a single data row - fast changing metric
private static string GenerateSqlSingleRowFast(int targetId, MetricGroup metricGroup, ProbeResultingData data)
{
string dataSqlStmt = "INSERT INTO " + SqlServerProbe.DataTableName(targetId, metricGroup) + " (dt,";
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
dataSqlStmt += metricGroup.metrics[i].name.Replace(' ', '_') + ",";
}
dataSqlStmt = dataSqlStmt.Remove(dataSqlStmt.Length - 1); // remove last comma
dataSqlStmt += ")" + Environment.NewLine + "VALUES ('" + SqlServerProbe.DateTimeToString(data.probeDateTime) + "',";
if (metricGroup.NumberOfMetrics != data.NumberOfColumns)
{
throw new Exception("Number of metrics don't match number of columns in probe results");
}
// add metric values
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
dataSqlStmt += SqlServerProbe.DataValueToString(metricGroup.metrics[i].type, data.values[0, metricGroup.NumberOfMultiRowKeys + metricGroup.NumberOfMultiRowKeyAttributes + i]) + ",";
}
dataSqlStmt = dataSqlStmt.Remove(dataSqlStmt.Length - 1); // remove last comma
dataSqlStmt += ")";
return(dataSqlStmt);
} // end of GenerateFastSqlSingleRow function
// Returns query that select the latest data record for single-row realtime metric
private static string QueryToLoadSingleRowRealtime(int targetId, MetricGroup metricGroup)
{
string query = "SELECT TOP 1 ";
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
query += metricGroup.metrics[i].name.Replace(' ', '_') + ", ";
}
query = query.Remove(query.Length - 2); // remove last comma
query += " FROM " + SqlServerProbe.DataTableName(targetId, metricGroup) + " ORDER BY ";
switch (metricGroup.changeSpeed)
{
case ChangeSpeed.Slow:
query += "startDate";
break;
case ChangeSpeed.Fast:
query += "dt";
break;
default:
throw new Exception("Only Slow and Fast change speeds have been implemented so far");
}
query += " DESC";
return(query);
}
// returns a set of datetime-value tuples in a JSON string
// param0: MetricGroupName - MetricGroup->Name
// param1: MetricName - MetricGroup->Metrics->Name
// param2: TargetId - Targets->Id
// param3: StartDateTime - YYYYMMDDHHMM
// param4: EndDateTime - YYYYMMDDHHMM
// param5: Interval - M in minutes
// test string ok http://localhost:3128/ws/fastsingle/Range/SQL%20Server%20Activity/CPU%20mils/0/201305201800/201305201900/5
// test string not ok http://localhost:3128/ws/fastsingle/Range/SQL%20Server%20Activity/CPU%20mils/0/201305201800/201305M900/5
private WebServiceResult Range(string[] parameters)
{
if (parameters.Count() < 6)
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): not enough parameters. Format is MetricGroupName/MetricName/TargetId/StartDateTime/EndDateTime/IntervalInMinutes"));
}
Regex r = new Regex("^[0-9]*$");
// check that supplied target id is valid
if (!r.IsMatch(parameters[2]) || !Configuration.targets.ContainsId(Convert.ToInt32(parameters[2])))
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): TargetId is either not numeric or doesn't exist"));
}
if (!r.IsMatch(parameters[3]) || !r.IsMatch(parameters[4]) || !r.IsMatch(parameters[5]))
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): at least one of the parameters is not numeric. Format is TargetId/StartDateTime/EndDateTime/IntervalInMinutes"));
}
if (parameters[3].Length != 12 || parameters[4].Length != 12)
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): StartDateTime and EndDateTime must be in YYYYMMDDHHMM format"));
}
// look up metric group by name
int metricGroupId = Configuration.metricGroups[parameters[0]].id;
// look up metric by name
string columnName = parameters[1].Replace(' ', '_');
// prepare parameters
SqlParameters sqlParameters = new SqlParameters
{
{ "@tablename", SqlServerProbe.DataTableName(Convert.ToInt32(parameters[2]), Configuration.metricGroups[metricGroupId]) },
{ "@columnname", columnName },
{ "@start_dt", SqlServerProbe.FormatDate(parameters[3]) },
{ "@end_dt", SqlServerProbe.FormatDate(parameters[4]) },
{ "@interval", parameters[5] }
};
// execute procedure and return results
return(GetData(System.Data.CommandType.StoredProcedure, "dbo.GetRangeSingleRowFastCumulative", sqlParameters));
}
} // end of CreateCacheTableSingleRowRealtime
/// <summary> Returns cache key name
/// For single-row metric cache is common for all targets (table name only, no schema)
/// Multi-row metrics each have its own cache </summary>
/// <param name="targetId">target id or -1 for single row metrics</param>
/// <param name="metricGroup">metric group</param>
/// <param name="CacheType">data/dictionary</param>
public static string GetCacheKey(int targetId, MetricGroup metricGroup, CacheType cacheType = CacheType.Data)
{
switch (cacheType)
{
case CacheType.Data:
if (metricGroup.isMultiRow)
{
return(SqlServerProbe.DataTableName(targetId, metricGroup));
}
else
{
return(metricGroup.dataTableName);
}
case CacheType.Dictionary:
return(SqlServerProbe.DictTableName(targetId, metricGroup));
default:
throw new Exception("Unsupported cache type");
}
} // end of GetCacheKey method
} // end of ProcessQueue function
#endregion public methods declarations
#region private static methods declarations
/// <summary>Generates UPDATE or INSERT statement for a single data row - slow changing metric</summary>
private static string GenerateSqlSingleRowSlow(int targetId, MetricGroup metricGroup, int dataMatches, ProbeResultingData data)
{
string dataSqlStmt;
if (dataMatches == 0) // just update endDate when current data matches one stored in repository
{
dataSqlStmt = "UPDATE " + SqlServerProbe.DataTableName(targetId, metricGroup)
+ " SET endDate = '" + SqlServerProbe.DateTimeToString(data.probeDateTime) + "'"
+ " WHERE startDate = (SELECT MAX(startDate) FROM " + SqlServerProbe.DataTableName(targetId, metricGroup) + ")";
}
else
{
if (metricGroup.NumberOfMetrics != data.NumberOfColumns)
{
throw new Exception("Number of metrics doesn't match number of columns in probe results");
}
dataSqlStmt = "INSERT INTO " + SqlServerProbe.DataTableName(targetId, metricGroup) + " (";
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
dataSqlStmt += metricGroup.metrics[i].name.Replace(' ', '_') + ",";
}
dataSqlStmt += "startDate,endDate)"
+ Environment.NewLine + "VALUES (";
// add metric values
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
dataSqlStmt += SqlServerProbe.DataValueToString(metricGroup.metrics[i].type, data.values[0, metricGroup.NumberOfMultiRowKeys + metricGroup.NumberOfMultiRowKeyAttributes + i]) + ",";
}
// startDate,endDate
dataSqlStmt += "'" + SqlServerProbe.DateTimeToString(data.probeDateTime) + "','" + SqlServerProbe.DateTimeToString(data.probeDateTime) + "')";
}
return(dataSqlStmt);
} // end of GenerateSlowSqlSingleRow function
} // end of Work method
private bool Archive(int targetId, ArchiveOffset archiveOffset, MetricGroup metricGroup,
DateTime archiveTo, DateTime archiveFrom)
{
// Do not archive static and slow changing metrics
if (metricGroup.changeSpeed != ChangeSpeed.Fast)
{
return(false);
}
// Compose SQL statement
// Save aggregated data in a temp table
string sqlStmt = "SELECT " + RoundDate("dt", archiveOffset.IntervalInSeconds) + " as dt, " + Environment.NewLine;
// add dictId if the metric group has multiple rows
if (metricGroup.isMultiRow)
{
sqlStmt += "dictId, ";
}
// Add AVG(column names)
foreach (var item in metricGroup.metrics)
{
sqlStmt += "AVG(" + item.Value.name.Replace(' ', '_') + ") as " + item.Value.name.Replace(' ', '_') + ", ";
}
sqlStmt = sqlStmt.Remove(sqlStmt.Length - 2) + Environment.NewLine; // remove last comma
sqlStmt += "INTO #AVG_TMP_" + metricGroup.dataTableName + Environment.NewLine;
sqlStmt += "FROM " + SqlServerProbe.DataTableName(targetId, metricGroup) + Environment.NewLine;
sqlStmt += "WHERE dt BETWEEN @dateFrom AND @dateTo" + Environment.NewLine;
sqlStmt += "GROUP BY " + RoundDate("dt", archiveOffset.IntervalInSeconds) + ", ";
// add dictId if the metric group has multiple rows
if (metricGroup.isMultiRow)
{
sqlStmt += "dictId, ";
}
sqlStmt = sqlStmt.Remove(sqlStmt.Length - 2) + ";" + Environment.NewLine + Environment.NewLine; // remove last comma
// Delete aggregated records
sqlStmt += "DELETE FROM " + SqlServerProbe.DataTableName(targetId, metricGroup) + " WHERE dt BETWEEN @dateFrom AND @dateTo;" + Environment.NewLine + Environment.NewLine;
// Copy records from the temp table
sqlStmt += "INSERT INTO " + SqlServerProbe.DataTableName(targetId, metricGroup) + " (dt, ";
// add dictId if the metric group has multiple rows
if (metricGroup.isMultiRow)
{
sqlStmt += "dictId, ";
}
// Add column names
foreach (var item in metricGroup.metrics)
{
sqlStmt += item.Value.name.Replace(' ', '_') + ", ";
}
sqlStmt = sqlStmt.Remove(sqlStmt.Length - 2); // remove last comma
sqlStmt += ")" + Environment.NewLine;
sqlStmt += "SELECT dt, ";
// add dictId if the metric group has multiple rows
if (metricGroup.isMultiRow)
{
sqlStmt += "dictId, ";
}
// Add column names
foreach (var item in metricGroup.metrics)
{
sqlStmt += item.Value.name.Replace(' ', '_') + ", ";
}
sqlStmt = sqlStmt.Remove(sqlStmt.Length - 2) + Environment.NewLine; // remove last comma
sqlStmt += "FROM #AVG_TMP_" + metricGroup.dataTableName + Environment.NewLine + Environment.NewLine;
// Update ArchivedToDate value
sqlStmt += "UPDATE dbo.ArchiveWatermarks SET ArchivedToDate = @dateTo WHERE ArchiveOffsetId = @archiveOffsetId and TargetId = @targetId;";
_logger.Trace(sqlStmt);
// Execute SQL statement
SqlTransaction reposTran = null;
SqlCommand reposCmd = null;
try
{
if (_reposConn.State != ConnectionState.Open)
{
_reposConn.Open();
}
reposTran = _reposConn.BeginTransaction();
reposCmd = _reposConn.CreateCommand();
reposCmd.Transaction = reposTran;
reposCmd.CommandType = CommandType.Text;
reposCmd.CommandText = sqlStmt;
reposCmd.CommandTimeout = 300;
reposCmd.Parameters.Add("@targetId", SqlDbType.Int);
reposCmd.Parameters["@targetId"].Value = targetId;
reposCmd.Parameters.Add("@archiveOffsetId", SqlDbType.Int);
reposCmd.Parameters["@archiveOffsetId"].Value = archiveOffset.Id;
reposCmd.Parameters.Add("@dateFrom", SqlDbType.DateTime2, 6);
reposCmd.Parameters["@dateFrom"].Value = RoundDate(archiveFrom, archiveOffset.IntervalInSeconds);
reposCmd.Parameters.Add("@dateTo", SqlDbType.DateTime2, 6);
reposCmd.Parameters["@dateTo"].Value = archiveTo;
reposCmd.Prepare();
reposCmd.ExecuteNonQuery();
reposTran.Commit();
}
catch (SqlException e)
{
if (_reposConn.State != ConnectionState.Open)
{
Manager.SetRepositoryAccessibility(false);
return(false);
}
switch (e.Number)
{
case 208: // Ignore missing tables. Target might be recently initialized
break;
default:
_logger.Error("SqlException: {0} ErrorCode: {1}", e.Message, e.Number);
break;
}
if (reposTran != null)
{
// Transaction might be rolled back if commit fails. In this case second rollback will fail
try
{
reposTran.Rollback();
}
catch (Exception)
{
_logger.Debug("Transaction has been rolled back already");
}
}
return(false);
}
catch (Exception e)
{
if (_reposConn.State == ConnectionState.Open)
{
_logger.Error(e.Message);
_logger.Error(e.StackTrace);
}
else
{
Manager.SetRepositoryAccessibility(false);
}
return(false);
}
finally
{
if (reposCmd != null)
{
((IDisposable)reposCmd).Dispose();
}
if (reposTran != null)
{
((IDisposable)reposTran).Dispose();
}
}
return(true);
} // end of Archive method
} // end of LoadDictionaryIntoCache function
// Loads data from repository into in-memory cache. Creates a new record in dictionaryCache
public static void LoadDataIntoCache(int targetId, MetricGroup metricGroup, bool allowReload, SqlConnection connection = null, SqlTransaction transaction = null)
{
string cacheKey;
SqlConnection conn;
if (metricGroup.changeSpeed != ChangeSpeed.Fast)
{
throw new Exception("Only fast changing metric is allowed");
}
SqlCommand cmd = null;
SqlDataReader dataReader = null;
// create new in-memory cache for dictionary
if (!ContainsKey(GetCacheKey(targetId, metricGroup, CacheType.Data)))
{
Dictionary <int, Column> valueColumns = new Dictionary <int, Column>();
// value/metric columns
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
valueColumns.Add(i, metricGroup.metrics[i]);
}
TryAdd(GetCacheKey(targetId, metricGroup, CacheType.Data), new CacheTable(new Dictionary <int, Column>(), valueColumns, metricGroup.isCumulative));
}
cacheKey = GetCacheKey(targetId, metricGroup, CacheType.Data);
CacheTable tmpCache = _cache[cacheKey].CloneAndClear();
// don't reload cache unless allowReload is specified
if (allowReload == false && tmpCache.loadedFromDatabase)
{
return;
}
try
{
string sqlStmt = "SELECT dictId, ";
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
sqlStmt += metricGroup.metrics[i].name.Replace(' ', '_') + ", ";
}
sqlStmt = sqlStmt.Remove(sqlStmt.Length - 2); // remove last comma
sqlStmt += Environment.NewLine + "FROM " + SqlServerProbe.DataTableName(targetId, metricGroup) +
Environment.NewLine + "WHERE dt = (SELECT MAX(dt) FROM " + SqlServerProbe.DataTableName(targetId, metricGroup) + ")";
_logger.Trace(sqlStmt);
if (connection == null)
{
conn = new SqlConnection(Configuration.GetReposConnectionString("Cache"));
conn.Open();
}
else
{
conn = connection;
}
int attempt = 1;
bool canTry = true;
while (attempt < 3 && canTry)
{
cmd = conn.CreateCommand();
cmd.CommandText = sqlStmt;
cmd.CommandType = System.Data.CommandType.Text;
if (transaction != null)
{
cmd.Transaction = transaction;
}
try
{
dataReader = cmd.ExecuteReader();
int id;
object[] values = new object[metricGroup.NumberOfMetrics];
while (dataReader.Read())
{
id = (int)dataReader["dictId"];
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
values[i] = dataReader[metricGroup.metrics[i].name.Replace(' ', '_')];
}
tmpCache.Add(id, new object[0], values);
}
dataReader.Close();
tmpCache.loadedFromDatabase = true;
Replace(cacheKey, tmpCache);
}
catch (SqlException e)
{
if (transaction != null)
{
transaction.Rollback();
}
switch (e.Number)
{
case 208: // Invalid object
// Do not create tables if target has been deleted
if (!Configuration.targets.ContainsKey(targetId))
{
return;
}
SqlServerProbe.CreateTablesForMetricGroup(targetId, metricGroup);
break;
default:
_logger.Error("SqlException: " + e.Message + " ErrorCode: " + e.Number.ToString());
canTry = false;
break;
}
}
finally
{
if (dataReader != null)
{
((IDisposable)dataReader).Dispose();
}
if (cmd != null)
{
((IDisposable)cmd).Dispose();
}
}
attempt++;
}
if (connection == null)
{
conn.Close();
}
}
catch (Exception e)
{
_logger.Error("SqlException: " + e.Message);
}
} // end of LoadDataIntoCache function
// method that runs continuously and purges data in repository
public void Work()
{
int targetId;
int timeTableId;
string sqlStmt;
MetricGroup metricGroup;
InstanceSchedule schedule;
List <Tuple <DateTime, int> > lastPurgeList;
_logger.Info("Purger started");
_reposConn = new SqlConnection(Configuration.GetReposConnectionString("Purger"));
while (!_shouldStop)
{
try
{
// this is to wait until the repository is ready to serve requests
if (!Manager.IsRepositoryAccessible)
{
Thread.Sleep(250);
continue;
}
if (this._reposConn.State != ConnectionState.Open)
{
this._reposConn.Open();
}
lastPurgeList = Configuration.timeTable.LastPurge();
foreach (Tuple <DateTime, int> lastPurge in lastPurgeList)
{
timeTableId = lastPurge.Item2;
// Skip schedules that have been deleted
if (!Configuration.timeTable.TryGetValue(timeTableId, out schedule))
{
continue;
}
// skip schedules that were purged recently
if (DateTime.Compare(lastPurge.Item1.AddMinutes(Configuration.purgeInterval), DateTime.Now) > 0)
{
continue;
}
targetId = schedule._targetId;
metricGroup = Configuration.metricGroups[schedule._metricGroupId];
// prepare SQL statement
switch (metricGroup.changeSpeed)
{
case ChangeSpeed.Slow:
sqlStmt = "DELETE FROM " + SqlServerProbe.DataTableName(targetId, metricGroup)
+ " WHERE endDate <= '" + SqlServerProbe.DateTimeToString(DateTime.Now.AddHours(-1 * schedule._schedule.retention)) + "'";
break;
case ChangeSpeed.Fast:
sqlStmt = "DELETE FROM " + SqlServerProbe.DataTableName(targetId, metricGroup)
+ " WHERE dt <= '" + SqlServerProbe.DateTimeToString(DateTime.Now.AddHours(-1 * schedule._schedule.retention)) + "'";
break;
default:
throw new Exception("Unsupported change speed");
}
// execute SQL statement
try
{
if (!Manager.IsRepositoryAccessible)
{
Thread.Sleep(250);
break;
}
if (_reposConn.State != ConnectionState.Open)
{
_reposConn.Open();
}
using (SqlCommand cmd = _reposConn.CreateCommand())
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = sqlStmt;
cmd.CommandTimeout = 300;
int rowCount = cmd.ExecuteNonQuery();
_logger.Debug("Rows deleted from table " + SqlServerProbe.DataTableName(targetId, metricGroup) + ": " + rowCount.ToString());
}
// update last purge time
Configuration.timeTable.SetLastPurge(lastPurge.Item2, DateTime.Now);
}
catch (SqlException e)
{
if (e.Number == 208)
{
_logger.Debug("Table " + SqlServerProbe.DataTableName(targetId, metricGroup) + " does not exist");
}
else if (this._reposConn.State != ConnectionState.Open)
{
Manager.SetRepositoryAccessibility(false);
}
else
{
_logger.Error("Could not purge " + SqlServerProbe.DataTableName(targetId, metricGroup) + " due to error: " + e.Message);
}
}
catch (Exception e)
{
if (this._reposConn.State == ConnectionState.Open)
{
_logger.Error("Could not purge " + SqlServerProbe.DataTableName(targetId, metricGroup) + " due to error: " + e.Message);
}
else
{
Manager.SetRepositoryAccessibility(false);
}
continue;
}
Thread.Sleep(250); // we don't want to stress the repository too much
} // foreach
Thread.Sleep(250);
}
catch (Exception e)
{
if (this._reposConn != null)
{
switch (this._reposConn.State)
{
case System.Data.ConnectionState.Broken:
case System.Data.ConnectionState.Closed:
Manager.SetRepositoryAccessibility(false);
break;
default:
_logger.Error(e.Message);
_logger.Error(e.StackTrace);
_mgr.ReportFailure("Purger");
return;
}
}
else
{
_logger.Error(e.Message);
_logger.Error(e.StackTrace);
_mgr.ReportFailure("Purger");
return;
}
} // end of catch
} // end of while (!_shouldStop)
_logger.Info("Purger stopped");
}
/// <summary>Returns true if new data matches in-memory copy or no history is found - single row - slow changing</summary>
private int CompareSlowSingleRowWithInMemoryData(int targetId, MetricGroup metricGroup, ProbeResultingData data, SqlConnection connection)
{
bool noHistory = false;
CacheTable dataCache;
// create in-memory cache table if it doesn't exist
if (!InMemoryCache.ContainsKey(InMemoryCache.GetCacheKey(-1, metricGroup)))
{
// Do not create tables if target has been deleted
if (!Configuration.targets.ContainsKey(targetId))
{
return(-1);
}
InMemoryCache.CreateCacheTableSingleRow(metricGroup, CacheType.Data);
}
dataCache = Configuration.inMemoryCache[InMemoryCache.GetCacheKey(-1, metricGroup, CacheType.Data)];
// load latest row from the repository if it is not in-memory yet
int id = dataCache.GetIdByKey(new object[] { targetId });
if (id == -1)
{
string sqlStmt = "SELECT ";
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
sqlStmt += metricGroup.metrics[i].name.Replace(' ', '_') + ",";
}
sqlStmt = sqlStmt.Remove(sqlStmt.Length - 1); // remove last comma
sqlStmt += " FROM " + SqlServerProbe.DataTableName(targetId, metricGroup);
sqlStmt += " WHERE startDate = (SELECT MAX(startDate) FROM " + SqlServerProbe.DataTableName(targetId, metricGroup) + ")";
using (SqlCommand cmd = connection.CreateCommand())
{
cmd.CommandType = System.Data.CommandType.Text;
cmd.CommandText = sqlStmt;
try
{
SqlDataReader dataReader = cmd.ExecuteReader();
if (dataReader.Read())
{
object[] oldValues = new object[metricGroup.NumberOfMetrics];
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
// check data type before casting
switch (metricGroup.metrics[i].type)
{
case DataType.Ansi:
if (!DataTypeMappingSqlServer.DoesBelong(dataReader.GetDataTypeName(i), DataType.Ansi))
{
throw new Exception("Data type of column #" + (i + 1).ToString() + " of '" + metricGroup.name + "' metric does not match any allowed data type for internal data type Ansi");
}
oldValues[i] = (object)dataReader.GetString(i);
break;
case DataType.Unicode:
if (!DataTypeMappingSqlServer.DoesBelong(dataReader.GetDataTypeName(i), DataType.Unicode))
{
throw new Exception("Data type of column #" + (i + 1).ToString() + " of '" + metricGroup.name + "' metric does not match any allowed data type for internal data type Unicode");
}
oldValues[i] = (object)dataReader.GetString(i);
break;
case DataType.Double:
if (!DataTypeMappingSqlServer.DoesBelong(dataReader.GetDataTypeName(i), DataType.Double))
{
throw new Exception("Data type of column #" + (i + 1).ToString() + " of '" + metricGroup.name + "' metric does not match any allowed data type for internal data type Double");
}
oldValues[i] = (object)dataReader.GetDouble(i);
break;
case DataType.SmallInt:
if (!DataTypeMappingSqlServer.DoesBelong(dataReader.GetDataTypeName(i), DataType.SmallInt))
{
throw new Exception("Data type of column #" + (i + 1).ToString() + " of '" + metricGroup.name + "' metric does not match any allowed data type for internal data type Int16");
}
oldValues[i] = (object)dataReader.GetInt16(i);
break;
case DataType.Datetime:
if (!DataTypeMappingSqlServer.DoesBelong(dataReader.GetDataTypeName(i), DataType.Datetime))
{
throw new Exception("Data type of column #" + (i + 1).ToString() + " of '" + metricGroup.name + "' metric does not match any allowed data type for internal data type Datetime");
}
oldValues[i] = (object)dataReader.GetDateTime(i);
break;
default:
throw new Exception("Unknown data type");
} // end of switch
i++;
}
id = dataCache.Add(-1, new object[] { targetId }, oldValues);
}
else
{
noHistory = true;
}
dataReader.Close();
dataReader.Dispose();
}
catch (SqlException e)
{
if (e.Number == 208) // Invalid object
{
// Do not create tables if target has been deleted
if (!Configuration.targets.ContainsKey(targetId))
{
return(-1);
}
SqlServerProbe.CreateTablesForMetricGroup(targetId, metricGroup);
noHistory = true;
}
else
{
throw;
}
}
}
if (noHistory)
{
return(-1);
}
}
// compare old and new values
object[] newValues = new object[metricGroup.NumberOfMetrics];
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
newValues[i] = data.values[0, i];
}
if (dataCache.CompareAttributesForKey(id, newValues))
{
return(0);
}
else
{
return(1);
}
}
} // end of WriteFastSingleRowToRepository function
/// <summary>Saves data into dictionary and data table for multi-value metrics</summary>
private void WriteMultipleRowsToRepository(int targetId, MetricGroup metricGroup, ProbeResultingData data)
{
int id;
CacheTable dictCache, dataCache;
List <int> newDictRows;
List <Tuple <int, int> > oldDictRows;
object[] key, attributes;
string dataTableName, dictTableName;
byte tryCount = 0;
bool canExit = false;
SqlTransaction tran = null;
string dictSqlStmt = string.Empty;
string dataSqlStmt = string.Empty;
newDictRows = new List <int>(); // ids of records that should be added to the dictionary (new rows or rows with updated attributes)
oldDictRows = new List <Tuple <int, int> >(); // ids and dictionary ids of records that changed since last probe and need to be closed
dataTableName = SqlServerProbe.DataTableName(targetId, metricGroup);
_logger.Debug("Name of data table: " + dataTableName);
dictTableName = SqlServerProbe.DictTableName(targetId, metricGroup);
_logger.Debug("Name of dictionary: " + dictTableName);
// load the dictionary cache table if it doesn't exist
if (!InMemoryCache.ContainsKey(dictTableName))
{
InMemoryCache.LoadDictionaryIntoCache(targetId, metricGroup, false);
}
dictCache = Configuration.inMemoryCache[dictTableName];
// load the dictionary cache table if it doesn't exist
if (!InMemoryCache.ContainsKey(dataTableName))
{
InMemoryCache.LoadDataIntoCache(targetId, metricGroup, false);
}
/*
* Checks for changed or new records in dictionary and if needed prepares SQL statement to update dictionary table
*/
switch (metricGroup.multiRowKeyAttributesChangeSpeed)
{
case ChangeSpeed.Static:
// check whether all records are in the dictionary or some need to be added to it
for (int i = 0; i < data.NumberOfRows; i++)
{
key = new object[metricGroup.NumberOfMultiRowKeys];
for (int j = 0; j < metricGroup.NumberOfMultiRowKeys; j++)
{
key[j] = data.values[i, j];
}
if (dictCache.GetIdByKey(key) == -1)
{
newDictRows.Add(i);
}
}
// generate SQL statements if there are any new dictionary records
if (newDictRows.Count > 0)
{
dictSqlStmt = GenerateSqlStaticDict(targetId, metricGroup, data, newDictRows);
}
break;
case ChangeSpeed.Slow:
// check whether all records are in the dictionary or some need to be added to it
for (int i = 0; i < data.NumberOfRows; i++)
{
key = new object[metricGroup.NumberOfMultiRowKeys];
for (int j = 0; j < metricGroup.NumberOfMultiRowKeys; j++)
{
key[j] = data.values[i, j];
}
id = dictCache.GetIdByKey(key);
if (id == -1)
{
newDictRows.Add(i);
}
else // check that attributes match
{
attributes = new object[metricGroup.NumberOfMultiRowKeyAttributes];
for (int j = 0; j < metricGroup.NumberOfMultiRowKeyAttributes; j++)
{
attributes[j] = data.values[i, metricGroup.NumberOfMultiRowKeys + j];
}
if (!dictCache.CompareAttributesForKey(id, attributes))
{
oldDictRows.Add(new Tuple <int, int>(i, id)); // this is to close the old record - UPDATE
}
}
}
// generate SQL statements if there are any changes or new records in dictionary
if (oldDictRows.Count > 0 || newDictRows.Count > 0)
{
dictSqlStmt = GenerateSqlSlowDict(targetId, metricGroup, data, oldDictRows, newDictRows);
}
break;
default:
throw new Exception("Unknown dictionary change speed");
}
/*
* Write new data into dictionary but don't close transaction yet
*/
if (dictSqlStmt.CompareTo(string.Empty) != 0)
{
_logger.Trace(dictSqlStmt);
// If tables don't exist, will try to create them and rerun SQL statements
while (!canExit && tryCount < 2)
{
try
{
// we will write to the dictionary first and then to the data table so we need to begin a transaction
tran = this.reposConn.BeginTransaction();
if (dictSqlStmt.CompareTo(string.Empty) != 0)
{
// save dictionary changes
using (SqlCommand cmd = this.reposConn.CreateCommand())
{
cmd.Transaction = tran;
cmd.CommandType = System.Data.CommandType.Text;
cmd.CommandText = dictSqlStmt;
int rowCount = cmd.ExecuteNonQuery();
_logger.Debug("Rows affected: " + rowCount.ToString());
}
}
InMemoryCache.LoadDictionaryIntoCache(targetId, metricGroup, true, this.reposConn, tran);
canExit = true;
}
catch (SqlException e)
{
if (tran != null)
{
tran.Rollback();
tran.Dispose();
tran = null;
}
switch (e.Number)
{
case 208: // Invalid object
// Do not create tables if target has been deleted
if (!Configuration.targets.ContainsKey(targetId))
{
return;
}
SqlServerProbe.CreateTablesForMetricGroup(targetId, metricGroup);
break;
default:
_logger.Error("SqlException: " + e.Message + " ErrorCode: " + e.Number.ToString());
break;
}
}
tryCount++;
}
}
/*
* Prepare SQL statement to save data with right references to the dictionary records
*/
switch (metricGroup.changeSpeed)
{
case ChangeSpeed.Fast:
dataSqlStmt = "INSERT INTO " + dataTableName + " (dt,dictId,";
for (int i = 0; i < metricGroup.NumberOfMetrics; i++)
{
dataSqlStmt += metricGroup.metrics[i].name.Replace(' ', '_') + ",";
}
dataSqlStmt = dataSqlStmt.Remove(dataSqlStmt.Length - 1); // remove last comma
dataSqlStmt += ")" + Environment.NewLine + "VALUES";
for (int i = 0; i < data.NumberOfRows; i++)
{
dataSqlStmt += Environment.NewLine + "('" + SqlServerProbe.DateTimeToString(data.probeDateTime) + "',";
// retrieve corresponding id from dictionary
key = new object[metricGroup.NumberOfMultiRowKeys];
for (int k = 0; k < metricGroup.NumberOfMultiRowKeys; k++)
{
key[k] = data.values[i, k];
}
id = dictCache.GetIdByKey(key);
dataSqlStmt += id.ToString() + ",";
// add metric values
for (int j = 0; j < metricGroup.NumberOfMetrics; j++)
{
dataSqlStmt += SqlServerProbe.DataValueToString(metricGroup.metrics[j].type, data.values[i, metricGroup.NumberOfMultiRowKeys + metricGroup.NumberOfMultiRowKeyAttributes + j]) + ",";
}
dataSqlStmt = dataSqlStmt.Remove(dataSqlStmt.Length - 1); // remove last comma
dataSqlStmt += "),";
}
dataSqlStmt = dataSqlStmt.Remove(dataSqlStmt.Length - 1); // remove last comma
_logger.Trace(dataSqlStmt);
break;
default:
throw new Exception("Unsupported data change speed");
}
/*
* Executes SQL statements
* If tables don't exist, will try to create them and rerun SQL statements
*/
try
{
// save data
using (SqlCommand cmd = this.reposConn.CreateCommand())
{
if (tran != null) // use same transaction as for the dictionary
{
cmd.Transaction = tran;
}
cmd.CommandType = System.Data.CommandType.Text;
cmd.CommandText = dataSqlStmt;
int rowCount = cmd.ExecuteNonQuery();
_logger.Debug("Rows affected: " + rowCount.ToString());
}
if (tran != null)
{
tran.Commit();
}
InMemoryCache.LoadDictionaryIntoCache(targetId, metricGroup, true);
dictCache = Configuration.inMemoryCache[dictTableName];
// Update in-memory data cache
object[] newValues;
dataCache = Configuration.inMemoryCache[dataTableName];
for (int i = 0; i < data.NumberOfRows; i++)
{
key = new object[metricGroup.NumberOfMultiRowKeys];
for (int j = 0; j < metricGroup.NumberOfMultiRowKeys; j++)
{
key[j] = data.values[i, j];
}
id = dictCache.GetIdByKey(key);
newValues = new object[metricGroup.NumberOfMetrics];
for (int j = 0; j < metricGroup.NumberOfMetrics; j++)
{
newValues[j] = data.values[i, metricGroup.NumberOfMultiRowKeys + metricGroup.NumberOfMultiRowKeyAttributes + j];
}
dataCache.AddOrUpdateRowValues(id, new object[0], newValues);
}
canExit = true;
}
catch (SqlException e)
{
_logger.Error("SqlException: " + e.Message + " ErrorCode: " + e.Number.ToString());
if (tran != null)
{
tran.Rollback();
InMemoryCache.LoadDictionaryIntoCache(targetId, metricGroup, true);
}
}
}
// returns a set of datetime-value tuples in a JSON string
// param0: MetricGroupName - MetricGroup->Name
// param1: TargetId - Targets->Id
// param2: StartDateTime - YYYYMMDDHHMM
// param3: EndDateTime - YYYYMMDDHHMM
// param4: Interval - M in minutes
// param5: MetricName - MetricGroup->metrics->name
// param6: NumOfRowsToReturn - Number of records to return (TOP X)
// param7: DictionaryKeyName - MetricGroup->multiRowKeys->name
// param8: Optional. Dictionary keys to exclude
// test string ok http://localhost:3128/ws/fastmulti/Range/SQL%20Server%20Wait%20Stats/0/201305201800/201305201900/5/Wait%20Time%20ms/5/Wait%20Type/
// test string not ok http://localhost:3128/ws/fastmulti/Range/SQL%20Server%20Wait%20Stats/0/201305201800/201305M900/5/Wait%20Time%20ms/10/Wait%20Type/
private WebServiceResult Range(string[] parameters)
{
if (parameters.Count() < 8)
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): too few parameters. Format is MetricGroupName/TargetId/StartDateTime/EndDateTime/IntervalInMinutes/MetricName/DictionaryKeyName/[DictionaryKeysToExclude]"));
}
if (parameters.Count() > 9)
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): too many parameters. Format is MetricGroupName/TargetId/StartDateTime/EndDateTime/IntervalInMinutes/MetricName/numOfRowsToReturn/DictionaryKeyName/[DictionaryKeysToExclude]"));
}
Regex r = new Regex("^[0-9]*$");
// check that supplied target id is valid
if (!r.IsMatch(parameters[1]) || !Configuration.targets.ContainsId(Convert.ToInt32(parameters[1])))
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): TargetId is either not numeric or target with specified id doesn't exist"));
}
if (!r.IsMatch(parameters[2]) || !r.IsMatch(parameters[3]) || !r.IsMatch(parameters[4]))
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): TargetId or StartDateTime or EndDateTime or Interval is not numeric. Format is MetricGroupName/TargetId/StartDateTime/EndDateTime/IntervalInMinutes/MetricName/DictionaryKeyName/[DictionaryKeysToExclude]"));
}
if (parameters[2].Length != 12 || parameters[3].Length != 12)
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): StartDateTime and EndDateTime must be in YYYYMMDDHHMM format"));
}
if (!r.IsMatch(parameters[6]))
{
return(WebServiceResult.ReturnError(GetType().Name + ".Range(): NumOfRowsToReturn is not numeric"));
}
// look up metric group by name
var metricGroup = Configuration.metricGroups[parameters[0]];
string metricColumn = parameters[5].Replace(' ', '_');
string numOfRowsToReturn = parameters[6];
string exclusionColumn = parameters[7].Replace(' ', '_');
string excludedValues = string.Empty;
if (parameters.Count() == 9)
{
excludedValues = parameters[8];
}
// prepare parameters
SqlParameters sqlParameters = new SqlParameters
{
{ "@dataTable", SqlServerProbe.DataTableName(Convert.ToInt32(parameters[1]), metricGroup) },
{ "@dictionary", SqlServerProbe.DictTableName(Convert.ToInt32(parameters[1]), metricGroup) },
{ "@start_dt", SqlServerProbe.FormatDate(parameters[2]) },
{ "@end_dt", SqlServerProbe.FormatDate(parameters[3]) },
{ "@interval", parameters[4] },
{ "@metricColumn", metricColumn },
{ "@numOfRowsToReturn", numOfRowsToReturn },
{ "@exclusionColumn", exclusionColumn },
{ "@excludedValues", excludedValues }
};
// execute procedure and return results
if (metricGroup.isCumulative)
{
return(GetData(System.Data.CommandType.StoredProcedure, "dbo.GetRangeMultiRowFastCumulative", sqlParameters));
}
return(GetData(System.Data.CommandType.StoredProcedure, "dbo.GetRangeMultiRowFastNonCumulative", sqlParameters));
}