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