func (sender *Sender) sendStartMessage(startMessage models.PendingStartMessage) {
messageToSend, shouldSend := sender.startMessageToSend(startMessage)
if shouldSend {
if sender.numberOfStartMessagesSent < sender.conf.SenderMessageLimit {
sender.logger.Info("Sending message", startMessage.LogDescription())
err := sender.messageBus.Publish(sender.conf.SenderNatsStartSubject, messageToSend.ToJSON())
if err != nil {
sender.logger.Error("Failed to send start message", err, startMessage.LogDescription())
sender.didSucceed = false
return
}
sender.sentStartMessages = append(sender.sentStartMessages, startMessage)
if startMessage.KeepAlive == 0 {
sender.queueStartMessageForDeletion(startMessage, "a sent start message with no keep alive")
} else {
sender.markStartMessageSent(startMessage)
}
sender.numberOfStartMessagesSent += 1
}
} else {
sender.queueStartMessageForDeletion(startMessage, "start message that will not be sent")
}
}
func (a *appAnalyzer) appendStartMessageIfNotDuplicate(message models.PendingStartMessage, loggingMessage string, additionalDetails map[string]string) (didAppend bool) {
existingMessage, alreadyQueued := a.existingPendingStartMessages[message.StoreKey()]
if !alreadyQueued {
a.logger.Info(fmt.Sprintf("Enqueuing Start Message: %s", loggingMessage), message.LogDescription(), additionalDetails)
a.startMessages[message.StoreKey()] = message
return true
} else {
a.logger.Info(fmt.Sprintf("Skipping Already Enqueued Start Message: %s", loggingMessage), existingMessage.LogDescription(), additionalDetails)
return false
}
}
func (sender *Sender) startMessageToSend(message models.PendingStartMessage) (models.StartMessage, bool) {
messageToSend := models.StartMessage{
MessageId: message.MessageId,
AppGuid: message.AppGuid,
AppVersion: message.AppVersion,
InstanceIndex: message.IndexToStart,
}
if message.SkipVerification {
sender.logger.Info("Sending start message: message is marked with SkipVerification", message.LogDescription())
return messageToSend, true
}
appKey := sender.store.AppKey(message.AppGuid, message.AppVersion)
app, found := sender.apps[appKey]
if !found {
sender.logger.Info("Skipping sending start message: app is no longer desired", message.LogDescription())
return models.StartMessage{}, false
}
if !app.IsDesired() {
sender.logger.Info("Skipping sending start message: app is no longer desired", message.LogDescription(), app.LogDescription())
return models.StartMessage{}, false
}
if !app.IsIndexDesired(message.IndexToStart) {
sender.logger.Info("Skipping sending start message: instance index is beyond the desired # of instances", message.LogDescription(), app.LogDescription())
return models.StartMessage{}, false
}
if app.HasStartingOrRunningInstanceAtIndex(message.IndexToStart) {
sender.logger.Info("Skipping sending start message: instance is already running", message.LogDescription(), app.LogDescription())
return models.StartMessage{}, false
}
sender.logger.Info("Sending start message: instance is not running at desired index", message.LogDescription(), app.LogDescription())
return messageToSend, true
}
func (sender *Sender) queueStartMessageForDeletion(startMessage models.PendingStartMessage, reason string) {
sender.logger.Info(fmt.Sprintf("Deleting %s", reason), startMessage.LogDescription())
sender.startMessagesToDelete = append(sender.startMessagesToDelete, startMessage)
}