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	package dk.daoas.daoadresseservice;
2
3	import java.io.FileReader;
4	import java.io.IOException;
5	import java.util.Properties;
6
7	import javax.servlet.ServletContext;
8	import javax.servlet.ServletContextEvent;
9	import javax.servlet.ServletContextListener;
10	import javax.servlet.ServletRegistration;
11	import javax.servlet.annotation.WebListener;
12
13	import org.apache.commons.lang3.SystemUtils;
14
15	import dk.daoas.daoadresseservice.admin.ServiceConfig;
16	import dk.thoerup.circuitbreaker.CircuitBreaker;
17	import dk.thoerup.circuitbreaker.CircuitBreakerManager;
18	import dk.thoerup.circuitbreaker.statistics.AccountingStatistics;
19	import dk.thoerup.circuitbreaker.web.CircuitBreakerServletBase;
20	import dk.thoerup.webconfig.ConfigServlet;
21	import dk.thoerup.webconfig.PropertiesConfigLoader;
22
23	/**
24	* Application Lifecycle Listener implementation class ContextListener
25	*
26	*/
27	@WebListener
28	public class ContextListener implements ServletContextListener {
29
30
31
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	@Override
42	public void contextInitialized(ServletContextEvent ctxtEvt) {
43	System.out.println("Starting DAO Context");
44
45	ServletContext ctxt = ctxtEvt.getServletContext();
46
47	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
55	initDataLoader(ctxt, conf);
56
57	initCircuitBreakers(ctxt, conf);
58
59
60	System.out.println("DAO Context done");
61	}
62
63
64
65
66	private ServiceConfig initConfig(ServletContext ctxt) throws IOException {
67
68	final String CONF_FILE_NAME = "daoadresseservice.conf";
69
70
71	ServiceConfig conf = new ServiceConfig();
72
73	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
86	new PropertiesConfigLoader(propsFile).loadConfig(conf);
87
88
89	ctxt.setAttribute("config", conf);
90
91	// /////////////////////////////////////
92	ConfigServlet servlet = new ConfigServlet();
93	servlet.setConfigObject( conf );
94	ServletRegistration.Dynamic dynconf = ctxt.addServlet("webconfig", servlet );
95	dynconf.addMapping("/ConfigServlet");
96
97	return conf;
98	}
99
100	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	private void initCircuitBreakers(ServletContext ctxt, ServiceConfig conf) {
107	CircuitBreakerManager mgr = CircuitBreakerManager.getManager();
108
109	CircuitBreaker osm = new CircuitBreaker("osm", conf);
110	osm.setStatistics( new AccountingStatistics() );
111	mgr.addCircuitBreaker( osm );
112
113	CircuitBreaker google = new CircuitBreaker("google", conf);
114	google.setStatistics( new AccountingStatistics() );
115	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
127	}