luiz158 / vraptor-environment

A environment reader for vraptor

vraptor-environment

this plugin is deprecated and should be used only in vraptor 3.x versions

Since vraptor 4.0.0, environment is implemented inside of the framework.

A simple vraptor plugin that adds an environment dependent configuration file.

installing

vraptor-environment.jar can be downloaded from maven's repository, or configured in any compatible tool (check the newest version at http://search.maven.org/):

<dependency>
	<groupId>br.com.caelum.vraptor</groupId>
	<artifactId>vraptor-environment</artifactId>
	<version>1.1.4</version>
	<scope>compile</scope>
</dependency>

configuration

In your web.xml add:

<context-param>
	<param-name>br.com.caelum.vraptor.environment</param-name>
	<param-value>environment_name</param-value>
</context-param>

where environment_name is the current environment ('production' or 'development' for example).

environment_name.properties

Your environment_name.properties should be located at src/main/resources. Example ('development.properties'):

test_environment = true
test_mail = [email protected]
environment.controller = true

The environment.controller key is reserved. If it's set to true you will have access to /admin/environment where you can view and edit your configurations.

If can also define default values in a environment.properties file. Values defined there will be overriden in your specific environment properties file.

accessing environment properties on java code

You can inject the Environment instance in your controller or any component managed by IoC container you have in your application. For example:

import br.com.caelum.vraptor.environment.Environment;

@Resource
public class myController {

	private final Environment environment;
	private final MailSender sender;

	public myController(Environment environment, MailSender sender) {
		this.environment = environment;
		this.sender = sender;
	}

	public void sendMail(String email) {
		if (environment.supports("test_environment")) {
			sender.sendMailTo(environment.get("test_mail"));
			return;
		}
		sender.sendMailTo(email);
	}
}

accessing environment properties on jsp

It's possible to access any environment property from a jsp file. You can use the taglibs env:supports and env:get, as in:

<env:supports key='test_environment'>
	<p>
		You are in the test environment. Your actions here won't affect the real system.
	</p>
</env:supports>

Sending mail to: <env:get key='test_mail'/>

acessing configuration files per environment

Suppose you need to access a hibernate.cfg.xml file according to your environment. Put your hibernate.cfg.xml files into the folders development and production. Now Environment.getResource will return the resource according to your current environment as in:

cfg = new AnnotationConfiguration();
cfg.configure(environment.getResource("/hibernate.cfg.xml"));

For backward compatibility, if the configuration file is not found in the environment configuration directory, it will be loaded from the root directory.

help

Get help from vraptor developers and the community at vraptor mailing list.

configure env name

Set a global system variable named VRAPTOR_ENVIRONMENT.