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1 package example;
2
3 import java.io.IOException  ;
4 import java.util.Properties ;
5 import org.apache.commons.cli.CommandLine;
6 import org.apache.commons.cli.CommandLineParser;
7 import org.apache.commons.cli.Options;
8 import org.apache.commons.cli.ParseException;
9 import org.apache.commons.cli.PosixParser;
10
11 public class ConfigurationsExample {
12
13 public static void main(String [] args) {
14 String jdbcPropToLoad = "prod.properties";
15 CommandLineParser parser = new PosixParser();
16 Options options = new Options();
17 options.addOption("d", "dev", false, "Dev tag to launch app in dev mode. Means that app will launch embedded mckoi db.");
18 try {
19 CommandLine line = parser.parse( options, args );
20 if(line.hasOption("d")) {
21 System.err.println("App is in DEV mode");
22 jdbcPropToLoad = "dev.properties";
23 }
24 }
25 catch( ParseException exp ) {
26 System.err.println( "Parsing failed. Reason: " + exp.getMessage() );
27 }
28 Properties p = new Properties ();
29 try {
30 p.load(ConfigurationsExample.class.getResourceAsStream("/"+jdbcPropToLoad));
31 } catch (IOException e) {
32 System.err.println( "Properties loading failed. Reason: " + e.getMessage());
33 }
34 try {
35 String clazz = p.getProperty("driver.class");
36 Class.forName(clazz);
37 System.out.println(" Jdbc driver loaded :"+clazz);
38 } catch (ClassNotFoundException e) {
39 System.err.println( "Jdbc Driver class loading failed. Reason: " + e.getMessage());
40 e.printStackTrace();
41 }
42
43 }
44 }
45 |
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Java API By Example, From Geeks To Geeks.