Spring Profile pattern ,part 2

Spring Profile pattern -  phase 1: infra preparation


This phase will establish the initial infra for using Spring Profile and the configuration files.

Step 1.1  - create a properties file which contains all configuration data
Assuming you have a maven style project, create a file in src/main/resources/properties for each environment, e.g:
my_company_dev.properties
my_company_test.properties
my_company_production.properties

example for my_company_dev.properties content:

jdbc.url=jdbc:mysql://localhost:3306/my_project_db
db.username=dev1
db.password=dev1
hibernate.show_sql=true

example for my_company_production.properties content:


jdbc.url=jdbc:mysql://10.26.26.26:3306/my_project_db
db.username=prod1
db.password=fdasjkladsof8aualwnlulw344uwj9l34
hibernate.show_sql=false


Step 1.2  - create an annotation for each profile
In src.main.java.com.mycompany.annotation create annotation for each Profile, e.g :

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Profile("DEV")
public @interface Dev {
}

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Profile("PRODUCTION")
public @interface Production {
}

Create an enum for each profile:
public interface MyEnums {

public enum Profile{
DEV,
TEST,
PRODUCTION
}

Step 1.3  - make sure the profile is loaded during context loading

• Define a system variable to indicate on which environment the code is running.
  In Tomcat, go to ${tomcat.di}/conf/catalina.properties and insert a line:
  profile=DEV  (according to your environment)
• Define a class to set the active profile
  

  public class ConfigurableApplicationContextInitializer implements
    ApplicationContextInitializer {
  
   @Override
   public void initialize(ConfigurableApplicationContext applicationContext) {
        
    String profile = System.getProperty("profile");
      
    if (profile==null || profile.equalsIgnoreCase(Profile.DEV.name())){
     applicationContext.getEnvironment().setActiveProfiles(Profile.DEV.name());   
    }else if(profile.equalsIgnoreCase(Profile.PRODUCTION.name())){
     applicationContext.getEnvironment().setActiveProfiles(Profile.PRODUCTION.name()); 
    }else if(profile.equalsIgnoreCase(Profile.TEST.name())){
     applicationContext.getEnvironment().setActiveProfiles(Profile.TEST.name()); 
          }
   }
  }
  

• Make sure the class is loaded during context loading
  in the project web.xml, insert the following:

  
       contextInitializerClasses
       com.matomy.conf.ConfigurableApplicationContextInitializer
   
  

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