Jetty health servlet

HealthServlet.java

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class HealthServlet extends HttpServlet {

	private static final Logger logger = LoggerFactory.getLogger(HealthServlet.class);

	private static volatile boolean isHealthy = false;
	
	public synchronized static void setHealthy() {
		isHealthy = true;
	}
	
	public synchronized static void setUnhealthy() {
		isHealthy = false;
	}
	
	public synchronized static boolean isHealthy() {
		return isHealthy;
	}

	@Override
	public void doGet(HttpServletRequest request, HttpServletResponse response) {
		if (isHealthy()) {
			response.setStatus(HttpServletResponse.SC_OK);
			logger.info("Responded to health check: " + HttpServletResponse.SC_OK);
		} else {
			response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
			logger.info("Responded to health check: " + HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
		}
	}

	@Override
	public void doPost(HttpServletRequest request, HttpServletResponse response) {
		if ("true".equalsIgnoreCase(request.getParameter("health"))) {
			setHealthy();
			logger.info("Set healthy due to POST request");
		} else {
			setUnhealthy();
			logger.info("Set unhealthy due to POST request");
		}
	}
}