Spring Boot "poor man's" database down email notification

App.java

	@Value("${email.username}")
	private String emailUsername;

	@Value("${email.password}")
	private String emailPassword;

	@Bean
	public JavaMailSender mailSender() {
		JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
		mailSender.setHost("smtp.gmail.com");
		mailSender.setPort(25);
		mailSender.setUsername(emailUsername);
		mailSender.setPassword(emailPassword);

		Properties props = new Properties();
		props.put("mail.smtp.starttls.enable", "true");
		mailSender.setJavaMailProperties(props);
		
		return mailSender;
	}

email-dependencies.xml

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
	<groupId>com.sun.mail</groupId>
	<artifactId>javax.mail</artifactId>
</dependency>

health.json

{
    "status": "UP",
    "diskSpace": {
        "status": "UP",
        "free": 263739887616,
        "threshold": 10485760
    },
    "db": {
        "status": "UP",
        "database": "MySQL",
        "hello": 1
    }
}

ScheduledTasks.java

@Component
public class ScheduledTasks {

	private static final Logger LOG = LoggerFactory.getLogger(ScheduledTasks.class);

	private static boolean emailSent = false;

	@Autowired
	ApplicationContext appContext;

	@Autowired
	JavaMailSender mailSender;

	@Value("${email.to}")
	private String toAddress;

	@Scheduled(fixedDelay = 7000)
	public void detectLostDbConnection() {
		DataSourceHealthIndicator dshi = appContext.getBean(DataSourceHealthIndicator.class);
		Health health = dshi.health();
		Status status = health.getStatus();

		if (status != null && "DOWN".equals(status.getCode())) {
			if (!emailSent) {
				LOG.error("Database connection lost");
				try {
					mailSender.send(dbConnectionLostMailMessage());
					emailSent = true;
				} catch (MailException ex) {
					LOG.error("'Database connection lost' email notification failed");
				}
			}
		} else {
			emailSent = false;
		}
	}

	private SimpleMailMessage dbConnectionLostMailMessage() {
		SimpleMailMessage msg = new SimpleMailMessage();
		msg.setSubject("Database connection lost");
		msg.setTo(toAddress);
		msg.setText("Houston, we have a problem");

		return msg;
	}

}

spring-boot-starter-actuator.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>