public void SetUp()
{
var container = ContainerExtensions.CreateDefaultContainer()
.InitializeDefaultServices()
.InitializeDatabaseDrivers();
var configuration = new Configuration(container);
configuration.Common.EventMeta.ClassPropertyResolutionStyle = PropertyResolutionStyle.CASE_INSENSITIVE;
configuration.Common.AddEventType("StockTick", typeof(StockTick).FullName);
_runtime = EPRuntimeProvider.GetRuntime("TestStockTickerRSI", configuration);
_runtime.Initialize();
_stockListener = new RSIStockTickerListener(_runtime, PERIOD);
_expressionText = "every tick=StockTick(stockSymbol='" + SYMBOL + "')";
//_expressionText = "every tick1=StockTick(stockSymbol='GOOG') -> tick2=StockTick(stockSymbol='GOOG')";
_factory = _runtime.CompileDeploy(_expressionText).Statements[0];
_factory.Events += _stockListener.Update;
var rsiEvent = typeof(RSIEvent).FullName;
var viewExpr = "select * from " + rsiEvent + ".win:length(1)";
_rsiListener = new RSIListener();
_factory = _runtime.CompileDeploy(viewExpr).Statements[0];
_factory.Events += _rsiListener.Update;
_rsiListener.Reset();
}
public RealtimeSummaryStmt(EPRuntime runtime)
{
//
// Min,Max,Average total latency from the events (difference in time between A and C) over the past 30 minutes.
// Min,Max,Average latency between events A/B (time stamp of B minus A) and B/C (time stamp of C minus B).
//
string stmtTotal = "select min(latencyAC) as minLatencyAC, " +
"max(latencyAC) as maxLatencyAC, " +
"avg(latencyAC) as avgLatencyAC, " +
"min(latencyAB) as minLatencyAB, " +
"max(latencyAB) as maxLatencyAB, " +
"avg(latencyAB) as avgLatencyAB, " +
"min(latencyBC) as minLatencyBC, " +
"max(latencyBC) as maxLatencyBC, " +
"avg(latencyBC) as avgLatencyBC " +
"from CombinedEvent.win:time(30 min)";
TotalsStatement = runtime.CompileDeploy(stmtTotal).Statements[0];
//
// Min,Max,Average latency grouped by (a) customer ID and (b) supplier ID.
// In other words, metrics on the the latency of the orders coming from each customer and going to each supplier.
//
string stmtCustomer = "select customerId," +
"min(latencyAC) as minLatency," +
"max(latencyAC) as maxLatency," +
"avg(latencyAC) as avgLatency " +
"from CombinedEvent.win:time(30 min) " +
"group by customerId";
CustomerStatement = runtime.CompileDeploy(stmtCustomer).Statements[0];
string stmtSupplier = "select supplierId," +
"min(latencyAC) as minLatency," +
"max(latencyAC) as maxLatency," +
"avg(latencyAC) as avgLatency " +
"from CombinedEvent.win:time(30 min) " +
"group by supplierId";
SupplierStatement = runtime.CompileDeploy(stmtSupplier).Statements[0];
}
public static EPStatement Create(EPRuntime runtime)
{
// We need to take in events A, B and C and produce a single, combined event
string stmt = "insert into CombinedEvent(transactionId, customerId, supplierId, latencyAC, latencyBC, latencyAB)" +
"select C.TransactionId," +
"CustomerId," +
"SupplierId," +
"C.Timestamp - A.Timestamp," +
"C.Timestamp - B.Timestamp," +
"B.Timestamp - A.Timestamp " +
"from TxnEventA.win:time(30 min) A," +
"TxnEventB.win:time(30 min) B," +
"TxnEventC.win:time(30 min) C " +
"where A.TransactionId = B.TransactionId and B.TransactionId = C.TransactionId";
return(runtime.CompileDeploy(stmt).Statements[0]);
}
//
// We need to detect a transaction that did not make it through all three events.
// In other words, a transaction with events A or B, but not C.
// Note that, in this case, what we care about is event C.
// The lack of events A or B could indicate a failure in the event transport and should be ignored.
// Although the lack of an event C could also be a transport failure, it merits looking into.
//
public static EPStatement Create(EPRuntime runtime)
{
// The inner table to both A and B is C.
//
// The listener will consider old events generated when either A or B leave the window, with
// a window size for A and B of 30 minutes.
//
// The window of C is declared large to ensure the C events don't leave the window before A and B
// thus generating false alerts, making these obvious via timestamp. Lets keep 1 hour of data for C.
string stmt = "select * from " +
"TxnEventA.win:time(30 min) A " +
"full outer join " +
"TxnEventC.win:time(1 hour) C on A.TransactionId = C.TransactionId " +
"full outer join " +
"TxnEventB.win:time(30 min) B on B.TransactionId = C.TransactionId " +
"where C.TransactionId is null";
return(runtime.CompileDeploy(stmt).Statements[0]);
}
public DynaLatencySpikeMonitor(LatencyLimit limit)
{
Log.Debug("New limit, for operation '" + limit.OperationName +
"' and customer '" + limit.CustomerId + "'" +
" setting threshold " + limit.LatencyThreshold);
var filter = "operationName='" + limit.OperationName +
"',customerId='" + limit.CustomerId + "'";
// Alert specific to operation and customer
_spikeLatencyDeployment = _runtime.CompileDeploy(
"every alert=" + typeof(OperationMeasurement).FullName +
"(" + filter + ", latency>" + limit.LatencyThreshold + ")");
_spikeLatencyAlert = _spikeLatencyDeployment.Statements[0];
_spikeLatencyAlert.Events += LogLatencyEvent;
// Stop pattern when the threshold changes
var eventName = typeof(LatencyLimit).FullName;
var stopPattern = _runtime.DeployStatement(eventName + "(" + filter + ")");
stopPattern.Events += ((newEvents, oldEvents) => _runtime
.DeploymentService.Undeploy(_spikeLatencyAlert.DeploymentId));
}
