daoas/daoadresseservice/ContextListener.java

package dk.daoas.daoadresseservice;

import java.io.FileReader;
import java.io.IOException;
import java.util.Properties;

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

import org.apache.commons.lang3.SystemUtils;

import dk.daoas.daoadresseservice.admin.ServiceConfig;
import dk.thoerup.circuitbreaker.CircuitBreaker;
import dk.thoerup.circuitbreaker.CircuitBreakerManager;
import dk.thoerup.circuitbreaker.statistics.AccountingStatistics;
import dk.thoerup.circuitbreaker.web.CircuitBreakerServletBase;
import dk.thoerup.webconfig.ConfigServlet;
import dk.thoerup.webconfig.PropertiesConfigLoader;

/**
 * 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 = null;
        try {
                conf = initConfig(ctxt);
        } catch (IOException e) {
                System.out.println("Error loading config " + e.getMessage());                   
                throw new RuntimeException(e);
        }
        
        initDataLoader(ctxt, conf);
        
        initCircuitBreakers(ctxt, conf);
        
        
        System.out.println("DAO Context done");
    }
    

    private ServiceConfig initConfig(ServletContext ctxt) throws IOException {
        
        final String CONF_FILE_NAME = "daoadresseservice.conf";
        
        
        ServiceConfig conf = new ServiceConfig();
        
        String file = null;
        if (SystemUtils.IS_OS_WINDOWS) {
                file = "C:\\" + CONF_FILE_NAME;
        } else {
                file = "/etc/" + CONF_FILE_NAME;
        }
    
        Properties propsFile = new Properties();
        try (FileReader reader = new FileReader(file) ) {
                propsFile.load(reader); 
        }
        
        
        new PropertiesConfigLoader(propsFile).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 initDataLoader(ServletContext ctxt, ServiceConfig conf) {
        DataLoader load = new DataLoader(ctxt,conf);            
        ctxt.setAttribute("dataloader", load);
        load.doLoad();
    }
    
    private void initCircuitBreakers(ServletContext ctxt, ServiceConfig conf) {
        CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
        
        CircuitBreaker osm = new CircuitBreaker("osm", conf);
        osm.setStatistics( new AccountingStatistics() );
        mgr.addCircuitBreaker( osm );
        
        CircuitBreaker google = new CircuitBreaker("google", conf);
        google.setStatistics( new AccountingStatistics() );
        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	torben	2393	import java.io.FileReader;
4			import java.io.IOException;
5			import java.util.Properties;
6
7	torben	2274	import javax.servlet.ServletContext;
8			import javax.servlet.ServletContextEvent;
9			import javax.servlet.ServletContextListener;
10	torben	2346	import javax.servlet.ServletRegistration;
11	torben	2274	import javax.servlet.annotation.WebListener;
12
13	torben	2393	import org.apache.commons.lang3.SystemUtils;
14
15	torben	2346	import dk.daoas.daoadresseservice.admin.ServiceConfig;
16	torben	2571	import dk.thoerup.circuitbreaker.CircuitBreaker;
17	torben	2352	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
18	torben	2571	import dk.thoerup.circuitbreaker.statistics.AccountingStatistics;
19	torben	2352	import dk.thoerup.circuitbreaker.web.CircuitBreakerServletBase;
20	torben	2346	import dk.thoerup.webconfig.ConfigServlet;
21	torben	2393	import dk.thoerup.webconfig.PropertiesConfigLoader;
22	torben	2346
23	torben	2274	/**
24			* Application Lifecycle Listener implementation class ContextListener
25			*
26			*/
27			@WebListener
28			public class ContextListener implements ServletContextListener {
29	torben	2281
30	torben	2393
31	torben	2274
32
33			public ContextListener() {
34			// TODO Auto-generated constructor stub
35			}
36
37			public void contextDestroyed(ServletContextEvent ctxtEvt) {
38			// TODO Auto-generated method stub
39			}
40
41	torben	2346	@Override
42	torben	2274	public void contextInitialized(ServletContextEvent ctxtEvt) {
43			System.out.println("Starting DAO Context");
44
45			ServletContext ctxt = ctxtEvt.getServletContext();
46	torben	2346
47	torben	2393	ServiceConfig conf = null;
48			try {
49			conf = initConfig(ctxt);
50			} catch (IOException e) {
51			System.out.println("Error loading config " + e.getMessage());
52			throw new RuntimeException(e);
53			}
54	torben	2346
55	torben	2352	initDataLoader(ctxt, conf);
56	torben	2351
57	torben	2352	initCircuitBreakers(ctxt, conf);
58	torben	2351
59	torben	2352
60	torben	2346	System.out.println("DAO Context done");
61			}
62
63	torben	2393
64	torben	2346
65
66	torben	2393	private ServiceConfig initConfig(ServletContext ctxt) throws IOException {
67
68			final String CONF_FILE_NAME = "daoadresseservice.conf";
69
70
71	torben	2346	ServiceConfig conf = new ServiceConfig();
72	torben	2274
73	torben	2393	String file = null;
74			if (SystemUtils.IS_OS_WINDOWS) {
75			file = "C:\\" + CONF_FILE_NAME;
76			} else {
77			file = "/etc/" + CONF_FILE_NAME;
78			}
79
80			Properties propsFile = new Properties();
81			try (FileReader reader = new FileReader(file) ) {
82			propsFile.load(reader);
83			}
84
85	torben	2274
86	torben	2393	new PropertiesConfigLoader(propsFile).loadConfig(conf);
87
88
89	torben	2346	ctxt.setAttribute("config", conf);
90	torben	2337
91	torben	2346	// /////////////////////////////////////
92			ConfigServlet servlet = new ConfigServlet();
93			servlet.setConfigObject( conf );
94			ServletRegistration.Dynamic dynconf = ctxt.addServlet("webconfig", servlet );
95			dynconf.addMapping("/ConfigServlet");
96	torben	2351
97	torben	2393	return conf;
98	torben	2274	}
99	torben	2346
100	torben	2393	private void initDataLoader(ServletContext ctxt, ServiceConfig conf) {
101			DataLoader load = new DataLoader(ctxt,conf);
102			ctxt.setAttribute("dataloader", load);
103			load.doLoad();
104			}
105
106	torben	2352	private void initCircuitBreakers(ServletContext ctxt, ServiceConfig conf) {
107			CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
108
109	torben	2571	CircuitBreaker osm = new CircuitBreaker("osm", conf);
110			osm.setStatistics( new AccountingStatistics() );
111	torben	2352	mgr.addCircuitBreaker( osm );
112
113	torben	2571	CircuitBreaker google = new CircuitBreaker("google", conf);
114			google.setStatistics( new AccountingStatistics() );
115	torben	2352	mgr.addCircuitBreaker( google );
116
117
118			//
119			CircuitBreakerServletBase servlet = new CircuitBreakerServletBase();
120			ServletRegistration.Dynamic dynconf = ctxt.addServlet("circuitbreaker", servlet);
121			dynconf.addMapping("/CircuitBreakerServlet");
122			dynconf.setInitParameter("readonly", "1");
123
124			}
125
126	torben	2274
127			}