package dk.thoerup.traininfoservice;

import java.util.logging.Logger;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import dk.thoerup.circuitbreaker.AccountingCircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreakerManager;
import dk.thoerup.circuitbreaker.jmx.JMXWrapper;
import dk.thoerup.circuitbreaker.notification.JavaLogNotifier;

/**
 * Application Lifecycle Listener implementation class JmxListener
 *
 */
public class CircuitBreakerListener implements ServletContextListener {

	Logger logger = Logger.getLogger(CircuitBreakerListener.class.getName());

    public CircuitBreakerListener() {
    }

	/**
     * @see ServletContextListener#contextInitialized(ServletContextEvent)
     */
    public void contextInitialized(ServletContextEvent sce) {
        logger.warning("Context Init");
        
        int threshold = Integer.parseInt(sce.getServletContext().getInitParameter("banedk_threshold") );
        int timeout = Integer.parseInt( sce.getServletContext().getInitParameter("banedk_timeout") );
        CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
        
		AccountingCircuitBreaker banedk = new AccountingCircuitBreaker("banedk", threshold, timeout);
		banedk.setNotifier( new JavaLogNotifier() );
		mgr.addCircuitBreaker( banedk );		
		
		JMXWrapper.registerAllCircuitBreakers();
    }

	/**
     * @see ServletContextListener#contextDestroyed(ServletContextEvent)
     */
    public void contextDestroyed(ServletContextEvent sce) {
    	logger.warning("Context Destroyed");
		CircuitBreakerManager.getManager().removeCircuitBreaker("banedk");

    	JMXWrapper.unregisterAllCircuitBreakers();
    }
	
}