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 com.jcabi.manifests.Manifests;
import com.jcabi.manifests.ServletMfs;

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);

        
        try {
                Manifests.DEFAULT.append(new ServletMfs(ctxt));
        } catch (Exception e) {
                System.out.println("Error loading config " + e.getMessage());
        }
        
        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	2605	import com.jcabi.manifests.Manifests;
16			import com.jcabi.manifests.ServletMfs;
17
18	torben	2346	import dk.daoas.daoadresseservice.admin.ServiceConfig;
19	torben	2571	import dk.thoerup.circuitbreaker.CircuitBreaker;
20	torben	2352	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
21	torben	2571	import dk.thoerup.circuitbreaker.statistics.AccountingStatistics;
22	torben	2352	import dk.thoerup.circuitbreaker.web.CircuitBreakerServletBase;
23	torben	2346	import dk.thoerup.webconfig.ConfigServlet;
24	torben	2393	import dk.thoerup.webconfig.PropertiesConfigLoader;
25	torben	2346
26	torben	2274	/**
27			* Application Lifecycle Listener implementation class ContextListener
28			*
29			*/
30			@WebListener
31			public class ContextListener implements ServletContextListener {
32	torben	2281
33	torben	2393
34	torben	2274
35
36			public ContextListener() {
37			// TODO Auto-generated constructor stub
38			}
39
40			public void contextDestroyed(ServletContextEvent ctxtEvt) {
41			// TODO Auto-generated method stub
42			}
43
44	torben	2608	@Override
45	torben	2274	public void contextInitialized(ServletContextEvent ctxtEvt) {
46			System.out.println("Starting DAO Context");
47
48	torben	2605
49
50	torben	2274	ServletContext ctxt = ctxtEvt.getServletContext();
51	torben	2346
52	torben	2393	ServiceConfig conf = null;
53			try {
54			conf = initConfig(ctxt);
55			} catch (IOException e) {
56			System.out.println("Error loading config " + e.getMessage());
57			throw new RuntimeException(e);
58			}
59	torben	2346
60	torben	2352	initDataLoader(ctxt, conf);
61	torben	2351
62	torben	2352	initCircuitBreakers(ctxt, conf);
63	torben	2605
64	torben	2351
65	torben	2605	try {
66			Manifests.DEFAULT.append(new ServletMfs(ctxt));
67			} catch (Exception e) {
68			System.out.println("Error loading config " + e.getMessage());
69			}
70	torben	2352
71	torben	2346	System.out.println("DAO Context done");
72			}
73
74	torben	2393
75	torben	2346
76
77	torben	2393	private ServiceConfig initConfig(ServletContext ctxt) throws IOException {
78
79			final String CONF_FILE_NAME = "daoadresseservice.conf";
80
81
82	torben	2346	ServiceConfig conf = new ServiceConfig();
83	torben	2274
84	torben	2393	String file = null;
85			if (SystemUtils.IS_OS_WINDOWS) {
86			file = "C:\\" + CONF_FILE_NAME;
87			} else {
88			file = "/etc/" + CONF_FILE_NAME;
89			}
90
91			Properties propsFile = new Properties();
92			try (FileReader reader = new FileReader(file) ) {
93			propsFile.load(reader);
94			}
95
96	torben	2274
97	torben	2393	new PropertiesConfigLoader(propsFile).loadConfig(conf);
98
99
100	torben	2346	ctxt.setAttribute("config", conf);
101	torben	2337
102	torben	2346	// /////////////////////////////////////
103			ConfigServlet servlet = new ConfigServlet();
104			servlet.setConfigObject( conf );
105			ServletRegistration.Dynamic dynconf = ctxt.addServlet("webconfig", servlet );
106			dynconf.addMapping("/ConfigServlet");
107	torben	2351
108	torben	2393	return conf;
109	torben	2274	}
110	torben	2346
111	torben	2393	private void initDataLoader(ServletContext ctxt, ServiceConfig conf) {
112			DataLoader load = new DataLoader(ctxt,conf);
113			ctxt.setAttribute("dataloader", load);
114			load.doLoad();
115			}
116
117	torben	2352	private void initCircuitBreakers(ServletContext ctxt, ServiceConfig conf) {
118			CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
119
120	torben	2571	CircuitBreaker osm = new CircuitBreaker("osm", conf);
121			osm.setStatistics( new AccountingStatistics() );
122	torben	2352	mgr.addCircuitBreaker( osm );
123
124	torben	2571	CircuitBreaker google = new CircuitBreaker("google", conf);
125			google.setStatistics( new AccountingStatistics() );
126	torben	2352	mgr.addCircuitBreaker( google );
127
128
129			//
130			CircuitBreakerServletBase servlet = new CircuitBreakerServletBase();
131			ServletRegistration.Dynamic dynconf = ctxt.addServlet("circuitbreaker", servlet);
132			dynconf.addMapping("/CircuitBreakerServlet");
133			dynconf.setInitParameter("readonly", "1");
134
135			}
136
137	torben	2274
138			}