daoas/adressevedligehold/ContextListener.java

package dk.daoas.adressevedligehold;


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 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();
        
        try {
                initConfig(ctxt);
        } catch (IOException e) {
                System.out.println("Error loading config " + e.getMessage());                   
                throw new RuntimeException(e);
        }
        
        
        System.out.println("DAO Context done");
    }
    

    private ServiceConfig initConfig(ServletContext ctxt) throws IOException {
        
        final String CONF_FILE_NAME = "daoadressevedligehold.conf";
        
        
        ServiceConfig conf = ServiceConfig.getInstance();
        
        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;            
    }
    
        
}
1	package dk.daoas.adressevedligehold;
2
3
4	import java.io.FileInputStream;
5	import java.io.IOException;
6	import java.io.InputStreamReader;
7	import java.io.Reader;
8	import java.nio.charset.Charset;
9	import java.util.Properties;
10
11	import javax.servlet.ServletContext;
12	import javax.servlet.ServletContextEvent;
13	import javax.servlet.ServletContextListener;
14	import javax.servlet.ServletRegistration;
15	import javax.servlet.annotation.WebListener;
16
17	import org.apache.commons.lang3.SystemUtils;
18
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
45
46	ServletContext ctxt = ctxtEvt.getServletContext();
47
48	try {
49	initConfig(ctxt);
50	} catch (IOException e) {
51	System.out.println("Error loading config " + e.getMessage());
52	throw new RuntimeException(e);
53	}
54
55
56	System.out.println("DAO Context done");
57	}
58
59
60
61
62	private ServiceConfig initConfig(ServletContext ctxt) throws IOException {
63
64	final String CONF_FILE_NAME = "daoadressevedligehold.conf";
65
66
67	ServiceConfig conf = ServiceConfig.getInstance();
68
69	String file = null;
70	if (SystemUtils.IS_OS_WINDOWS) {
71	file = "C:\\" + CONF_FILE_NAME;
72	} else {
73	file = "/etc/" + CONF_FILE_NAME;
74	}
75
76	Properties propsFile = new Properties();
77	try ( Reader reader = new InputStreamReader(new FileInputStream(file), Charset.forName("UTF-8")) ) {
78	propsFile.load(reader);
79	}
80
81
82	new PropertiesConfigLoader(propsFile).loadConfig(conf);
83
84
85	ctxt.setAttribute("config", conf);
86
87	// /////////////////////////////////////
88	ConfigServlet servlet = new ConfigServlet();
89	servlet.setConfigObject( conf );
90	ServletRegistration.Dynamic dynconf = ctxt.addServlet("webconfig", servlet );
91	dynconf.addMapping("/ConfigServlet");
92
93	return conf;
94	}
95
96
97	}