public void TestLatencyAlert()
{
var services = new[] { "s0", "s1", "s2" };
var customers = new[] { "c0", "c1", "c2" };
var limitSpike = new[] { 15000L, 10000L, 10040L };
// Set up limits for 3 services/customer combinations
for (var i = 0; i < services.Length; i++)
{
var limit = new LatencyLimit(services[i], customers[i], limitSpike[i]);
runtime.SendEvent(limit);
}
// Send events
for (int i = 0; i < 100; i++)
{
for (int index = 0; index < services.Length; index++)
{
var measurement = new OperationMeasurement(services[index], customers[index], 9950 + i, true);
runtime.SendEvent(measurement);
}
}
// Send a new limit
var nlimit = new LatencyLimit(services[1], customers[1], 8000);
runtime.SendEvent(nlimit);
// Send a new spike
var nmeasurement = new OperationMeasurement(services[1], customers[1], 8001, true);
runtime.SendEvent(nmeasurement);
}
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
_spikeLatencyAlert = _admin.CreatePattern(
"every alert=" + typeof(OperationMeasurement).FullName +
"(" + filter + ", latency>" + limit.LatencyThreshold + ")");
_spikeLatencyAlert.Events += LogLatencyEvent;
// Stop pattern when the threshold changes
String eventName = typeof(LatencyLimit).FullName;
EPStatement stopPattern = _admin.CreatePattern(eventName + "(" + filter + ")");
stopPattern.Events += ((newEvents, oldEvents) => _spikeLatencyAlert.Stop());
}
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));
}
