daoas/daoadresseservice/ContextListener.java

package dk.daoas.daoadresseservice;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.nio.charset.Charset;
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 ( Reader reader = new InputStreamReader(new FileInputStream(file), Charset.forName("UTF-8")) ) {
                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	2617	import java.io.FileInputStream;
4	torben	2393	import java.io.IOException;
5	torben	2617	import java.io.InputStreamReader;
6			import java.io.Reader;
7			import java.nio.charset.Charset;
8	torben	2393	import java.util.Properties;
9
10	torben	2274	import javax.servlet.ServletContext;
11			import javax.servlet.ServletContextEvent;
12			import javax.servlet.ServletContextListener;
13	torben	2346	import javax.servlet.ServletRegistration;
14	torben	2274	import javax.servlet.annotation.WebListener;
15
16	torben	2393	import org.apache.commons.lang3.SystemUtils;
17
18	torben	2605	import com.jcabi.manifests.Manifests;
19			import com.jcabi.manifests.ServletMfs;
20
21	torben	2346	import dk.daoas.daoadresseservice.admin.ServiceConfig;
22	torben	2571	import dk.thoerup.circuitbreaker.CircuitBreaker;
23	torben	2352	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
24	torben	2571	import dk.thoerup.circuitbreaker.statistics.AccountingStatistics;
25	torben	2352	import dk.thoerup.circuitbreaker.web.CircuitBreakerServletBase;
26	torben	2346	import dk.thoerup.webconfig.ConfigServlet;
27	torben	2393	import dk.thoerup.webconfig.PropertiesConfigLoader;
28	torben	2346
29	torben	2274	/**
30			* Application Lifecycle Listener implementation class ContextListener
31			*
32			*/
33			@WebListener
34			public class ContextListener implements ServletContextListener {
35	torben	2281
36	torben	2393
37	torben	2274
38
39			public ContextListener() {
40			// TODO Auto-generated constructor stub
41			}
42
43			public void contextDestroyed(ServletContextEvent ctxtEvt) {
44			// TODO Auto-generated method stub
45			}
46
47	torben	2608	@Override
48	torben	2274	public void contextInitialized(ServletContextEvent ctxtEvt) {
49			System.out.println("Starting DAO Context");
50
51	torben	2605
52
53	torben	2274	ServletContext ctxt = ctxtEvt.getServletContext();
54	torben	2346
55	torben	2393	ServiceConfig conf = null;
56			try {
57			conf = initConfig(ctxt);
58			} catch (IOException e) {
59			System.out.println("Error loading config " + e.getMessage());
60			throw new RuntimeException(e);
61			}
62	torben	2346
63	torben	2352	initDataLoader(ctxt, conf);
64	torben	2351
65	torben	2352	initCircuitBreakers(ctxt, conf);
66	torben	2605
67	torben	2351
68	torben	2605	try {
69			Manifests.DEFAULT.append(new ServletMfs(ctxt));
70			} catch (Exception e) {
71			System.out.println("Error loading config " + e.getMessage());
72			}
73	torben	2352
74	torben	2346	System.out.println("DAO Context done");
75			}
76
77	torben	2393
78	torben	2346
79
80	torben	2393	private ServiceConfig initConfig(ServletContext ctxt) throws IOException {
81
82			final String CONF_FILE_NAME = "daoadresseservice.conf";
83
84
85	torben	2346	ServiceConfig conf = new ServiceConfig();
86	torben	2274
87	torben	2393	String file = null;
88			if (SystemUtils.IS_OS_WINDOWS) {
89			file = "C:\\" + CONF_FILE_NAME;
90			} else {
91			file = "/etc/" + CONF_FILE_NAME;
92			}
93
94			Properties propsFile = new Properties();
95	torben	2617	try ( Reader reader = new InputStreamReader(new FileInputStream(file), Charset.forName("UTF-8")) ) {
96	torben	2393	propsFile.load(reader);
97			}
98
99	torben	2274
100	torben	2393	new PropertiesConfigLoader(propsFile).loadConfig(conf);
101
102
103	torben	2346	ctxt.setAttribute("config", conf);
104	torben	2337
105	torben	2346	// /////////////////////////////////////
106			ConfigServlet servlet = new ConfigServlet();
107			servlet.setConfigObject( conf );
108			ServletRegistration.Dynamic dynconf = ctxt.addServlet("webconfig", servlet );
109			dynconf.addMapping("/ConfigServlet");
110	torben	2351
111	torben	2393	return conf;
112	torben	2274	}
113	torben	2346
114	torben	2393	private void initDataLoader(ServletContext ctxt, ServiceConfig conf) {
115			DataLoader load = new DataLoader(ctxt,conf);
116			ctxt.setAttribute("dataloader", load);
117			load.doLoad();
118			}
119
120	torben	2352	private void initCircuitBreakers(ServletContext ctxt, ServiceConfig conf) {
121			CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
122
123	torben	2571	CircuitBreaker osm = new CircuitBreaker("osm", conf);
124			osm.setStatistics( new AccountingStatistics() );
125	torben	2352	mgr.addCircuitBreaker( osm );
126
127	torben	2571	CircuitBreaker google = new CircuitBreaker("google", conf);
128			google.setStatistics( new AccountingStatistics() );
129	torben	2352	mgr.addCircuitBreaker( google );
130
131
132			//
133			CircuitBreakerServletBase servlet = new CircuitBreakerServletBase();
134			ServletRegistration.Dynamic dynconf = ctxt.addServlet("circuitbreaker", servlet);
135			dynconf.addMapping("/CircuitBreakerServlet");
136			dynconf.setInitParameter("readonly", "1");
137
138			}
139
140	torben	2274
141			}