environment.monitor.subscribe(ApplicationStarting) {
    isAlive = true
}

environment.monitor.subscribe(ApplicationStarted) {
    isAlive = true
}

environment.monitor.subscribe(ApplicationStopPreparing) {
    isAlive = false
}

environment.monitor.subscribe(ApplicationStopping) {
    isAlive = false
}

environment.monitor.subscribe(ApplicationStopped) {
    isAlive = false
}