daoas/daoadresseservice/ContextListener.java

package dk.daoas.daoadresseservice;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.ServletRegistration;
import javax.servlet.annotation.WebListener;

import dk.daoas.daoadresseservice.admin.ServiceConfig;
import dk.thoerup.circuitbreaker.AccountingCircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreakerManager;
import dk.thoerup.circuitbreaker.web.CircuitBreakerServletBase;
import dk.thoerup.webconfig.ConfigServlet;
import dk.thoerup.webconfig.ContextConfigLoader;

/**
 * Application Lifecycle Listener implementation class ContextListener
 *
 */
@WebListener
public class ContextListener implements ServletContextListener {
        

    public ContextListener() {
        // TODO Auto-generated constructor stub
    }

    public void contextDestroyed(ServletContextEvent ctxtEvt)  { 
         // TODO Auto-generated method stub
    }

    @Override
    public void contextInitialized(ServletContextEvent ctxtEvt)  {
        System.out.println("Starting DAO Context");
        
        ServletContext ctxt = ctxtEvt.getServletContext();
        
        ServiceConfig conf = initConfig(ctxt);
        
        initDataLoader(ctxt, conf);
        
        initCircuitBreakers(ctxt, conf);
        
        
        System.out.println("DAO Context done");
    }
    
    private void initDataLoader(ServletContext ctxt, ServiceConfig conf) {
        DataLoader load = new DataLoader(ctxt,conf);            
        ctxt.setAttribute("dataloader", load);
        load.doLoad();
    }
        
    
    private ServiceConfig initConfig(ServletContext ctxt) {
        ServiceConfig conf = new ServiceConfig();
        
        new ContextConfigLoader(ctxt).loadConfig(conf);
        
        ctxt.setAttribute("config", conf);
        
        // /////////////////////////////////////
        ConfigServlet servlet = new ConfigServlet();
        servlet.setConfigObject( conf );
        ServletRegistration.Dynamic dynconf = ctxt.addServlet("webconfig", servlet );
        dynconf.addMapping("/ConfigServlet");
        
        return conf;    
        
    }
    
    private void initCircuitBreakers(ServletContext ctxt, ServiceConfig conf) {
        CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
        
        AccountingCircuitBreaker osm = new AccountingCircuitBreaker("osm", conf);
        mgr.addCircuitBreaker( osm );
        
        AccountingCircuitBreaker google = new AccountingCircuitBreaker("google", conf);
        mgr.addCircuitBreaker( google );
        
        
        //
        CircuitBreakerServletBase servlet = new CircuitBreakerServletBase();
        ServletRegistration.Dynamic dynconf = ctxt.addServlet("circuitbreaker", servlet);
        dynconf.addMapping("/CircuitBreakerServlet");
        dynconf.setInitParameter("readonly", "1");

    }
        
        
}
1	torben	2274	package dk.daoas.daoadresseservice;
2
3			import javax.servlet.ServletContext;
4			import javax.servlet.ServletContextEvent;
5			import javax.servlet.ServletContextListener;
6	torben	2346	import javax.servlet.ServletRegistration;
7	torben	2274	import javax.servlet.annotation.WebListener;
8
9	torben	2346	import dk.daoas.daoadresseservice.admin.ServiceConfig;
10	torben	2352	import dk.thoerup.circuitbreaker.AccountingCircuitBreaker;
11			import dk.thoerup.circuitbreaker.CircuitBreakerManager;
12			import dk.thoerup.circuitbreaker.web.CircuitBreakerServletBase;
13	torben	2346	import dk.thoerup.webconfig.ConfigServlet;
14			import dk.thoerup.webconfig.ContextConfigLoader;
15
16	torben	2274	/**
17			* Application Lifecycle Listener implementation class ContextListener
18			*
19			*/
20			@WebListener
21			public class ContextListener implements ServletContextListener {
22	torben	2281
23	torben	2274
24
25	torben	2281
26	torben	2274	public ContextListener() {
27			// TODO Auto-generated constructor stub
28			}
29
30			public void contextDestroyed(ServletContextEvent ctxtEvt) {
31			// TODO Auto-generated method stub
32			}
33
34	torben	2346	@Override
35	torben	2274	public void contextInitialized(ServletContextEvent ctxtEvt) {
36			System.out.println("Starting DAO Context");
37
38			ServletContext ctxt = ctxtEvt.getServletContext();
39	torben	2346
40	torben	2351	ServiceConfig conf = initConfig(ctxt);
41	torben	2346
42	torben	2352	initDataLoader(ctxt, conf);
43	torben	2351
44	torben	2352	initCircuitBreakers(ctxt, conf);
45	torben	2351
46	torben	2352
47	torben	2346	System.out.println("DAO Context done");
48			}
49
50	torben	2351	private void initDataLoader(ServletContext ctxt, ServiceConfig conf) {
51			DataLoader load = new DataLoader(ctxt,conf);
52	torben	2337	ctxt.setAttribute("dataloader", load);
53			load.doLoad();
54	torben	2346	}
55
56
57	torben	2351	private ServiceConfig initConfig(ServletContext ctxt) {
58	torben	2346	ServiceConfig conf = new ServiceConfig();
59	torben	2274
60	torben	2346	new ContextConfigLoader(ctxt).loadConfig(conf);
61	torben	2274
62	torben	2346	ctxt.setAttribute("config", conf);
63	torben	2337
64	torben	2346	// /////////////////////////////////////
65			ConfigServlet servlet = new ConfigServlet();
66			servlet.setConfigObject( conf );
67			ServletRegistration.Dynamic dynconf = ctxt.addServlet("webconfig", servlet );
68			dynconf.addMapping("/ConfigServlet");
69	torben	2351
70			return conf;
71
72	torben	2274	}
73	torben	2346
74	torben	2352	private void initCircuitBreakers(ServletContext ctxt, ServiceConfig conf) {
75			CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
76
77			AccountingCircuitBreaker osm = new AccountingCircuitBreaker("osm", conf);
78			mgr.addCircuitBreaker( osm );
79
80			AccountingCircuitBreaker google = new AccountingCircuitBreaker("google", conf);
81			mgr.addCircuitBreaker( google );
82
83
84			//
85			CircuitBreakerServletBase servlet = new CircuitBreakerServletBase();
86			ServletRegistration.Dynamic dynconf = ctxt.addServlet("circuitbreaker", servlet);
87			dynconf.addMapping("/CircuitBreakerServlet");
88			dynconf.setInitParameter("readonly", "1");
89
90			}
91
92	torben	2274
93			}