public override void Run()
{
// initialize splunk logging (we do this here instead of OnStart so that the Azure logger has time to really start)
TraceLog.TraceInfo("WorkerRole started");
// check the database schema versions to make sure there is no version mismatch
if (!Storage.NewUserContext.CheckSchemaVersion())
{
TraceLog.TraceFatal("User database schema is out of sync, unrecoverable error");
return;
}
if (!Storage.NewSuggestionsContext.CheckSchemaVersion())
{
TraceLog.TraceFatal("Suggestions database schema is out of sync, unrecoverable error");
return;
}
// (re)create the database constants if the code contains a newer version
if (!Storage.NewUserContext.VersionConstants(Me))
{
TraceLog.TraceFatal("Cannot check and/or update the User database constants, unrecoverable error");
return;
}
if (!Storage.NewSuggestionsContext.VersionConstants(Me))
{
TraceLog.TraceFatal("Cannot check and/or update the Suggestions database constants, unrecoverable error");
return;
}
// get the number of workers (default is 0)
int workflowWorkerCount = ConfigurationSettings.GetAsNullableInt(HostEnvironment.WorkflowWorkerCountConfigKey) ?? 0;
int mailWorkerCount = ConfigurationSettings.GetAsNullableInt(HostEnvironment.MailWorkerCountConfigKey) ?? 0;
int speechWorkerCount = ConfigurationSettings.GetAsNullableInt(HostEnvironment.SpeechWorkerCountConfigKey) ?? 0;
speechWorkerCount = speechWorkerCount > 0 ? 1 : 0; // maximum number of speech worker threads is 1
var workflowWorkerArray = new WorkflowWorker.WorkflowWorker[workflowWorkerCount];
var mailWorkerArray = new MailWorker.MailWorker[mailWorkerCount];
var speechWorkerArray = new SpeechWorker.SpeechWorker[speechWorkerCount];
// run an infinite loop doing the following:
// check whether the worker services have stopped (indicated by a null reference)
// (re)start the service on a new thread if necessary
// sleep for the timeout period
while (true)
{
// start workflow worker in both dev and deployed Azure fabric
RestartWorkerThreads <WorkflowWorker.WorkflowWorker>(workflowWorkerArray);
// start mail and speech workers only in deployed Azure fabric
if (!HostEnvironment.IsAzureDevFabric)
{
RestartWorkerThreads <MailWorker.MailWorker>(mailWorkerArray);
}
if (!HostEnvironment.IsAzureDevFabric)
{
RestartWorkerThreads <SpeechWorker.SpeechWorker>(speechWorkerArray);
}
// sleep for the timeout period
Thread.Sleep(timeout);
}
}