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This example shows how to use DeltaSpike I18n.

Intro of Apache DeltaSpike I18n

The Apache DeltaSpike I18n is a module of Apache DeltaSpike project that enables the use of type-safe messages and internationalization.

Code sample

@MessageBundle interface

Create an interface with a method for each type-safe message. The interface should be annotated with @MessageBundle and for each message it is needed to annotaated with @MessageTemplate:

public interface MessageHelper {

    String openejbAndDeltaspike();

MessageHelper property file

It will lookup for the string "openejb.and.deltaspike" (without the curly brackets "{}") in a property file with the same name of the interface but with the extension .properties instead of .java or .class.

openejb.and.deltaspike = OpenEJB and DeltaSpike are cool products!

Using the type safe messages

Now you can inject the interface and retrieve the type-safe message:

    private MessageHelper msg;

    public void check() {
        assertEquals("OpenEJB and DeltaSpike are cool products!", msg.openejbAndDeltaspike());


Running the example is fairly simple. In the /tomee/examples/deltaspike-i18n directory run:

$ mvn clean install

Which should create output like the following.

Running org.superbiz.deltaspike.i18n.MessageHelperTest
INFO - ********************************************************************************
INFO - Startup: Tue Mar 05 17:05:52 GMT 2019
INFO - Copyright 1999-2018 (C) Apache OpenEJB Project, All Rights Reserved.
INFO - Version: 8.0.0-SNAPSHOT
INFO - Build date: 20190305
INFO - Build time: 01:33
INFO - ********************************************************************************
INFO - openejb.home = /Users/marcos.ferreira/Marcos/tomee/examples/deltaspike-i18n
INFO - openejb.base = /Users/marcos.ferreira/Marcos/tomee/examples/deltaspike-i18n
INFO - Created new singletonService org.apache.openejb.cdi.ThreadSingletonServiceImpl@436a4e4b
INFO - Succeeded in installing singleton service
INFO - Cannot find the configuration file [conf/openejb.xml].  Will attempt to create one for the beans deployed.
INFO - Configuring Service(id=Default Security Service, type=SecurityService, provider-id=Default Security Service)
INFO - Configuring Service(id=Default Transaction Manager, type=TransactionManager, provider-id=Default Transaction Manager)
INFO - Using 'openejb.deployments.classpath=false'
INFO - Creating TransactionManager(id=Default Transaction Manager)
INFO - Creating SecurityService(id=Default Security Service)
INFO - Configuring enterprise application: /Users/marcos.ferreira/Marcos/tomee/examples/deltaspike-i18n/a9dac2c3-841d-4954-b038-450896c63783.war
INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container)
INFO - Auto-creating a container for bean a9dac2c3-841d-4954-b038-450896c63783_org.superbiz.deltaspike.i18n.MessageHelperTest: Container(type=MANAGED, id=Default Managed Container)
INFO - Creating Container(id=Default Managed Container)
INFO - Using directory /var/folders/p6/lmyy1_jd7fv_h5lzqg8rpvhh0000gp/T for stateful session passivation
INFO - Enterprise application "/Users/marcos.ferreira/Marcos/tomee/examples/deltaspike-i18n/a9dac2c3-841d-4954-b038-450896c63783.war" loaded.
INFO - Assembling app: /Users/marcos.ferreira/Marcos/tomee/examples/deltaspike-i18n/a9dac2c3-841d-4954-b038-450896c63783.war
INFO - Existing thread singleton service in SystemInstance(): org.apache.openejb.cdi.ThreadSingletonServiceImpl@436a4e4b
INFO - Some Principal APIs could not be loaded: org.eclipse.microprofile.jwt.JsonWebToken out of org.eclipse.microprofile.jwt.JsonWebToken not found
INFO - OpenWebBeans Container is starting...
INFO - Adding OpenWebBeansPlugin : [CdiPlugin]
INFO - class: org.apache.deltaspike.core.impl.exception.control.extension.ExceptionControlExtension activated=true
INFO - class: org.apache.deltaspike.core.impl.message.MessageBundleExtension activated=true
INFO - class: org.apache.deltaspike.core.impl.message.NamedMessageBundleInvocationHandler activated=true
INFO - class: org.apache.deltaspike.core.impl.config.ConfigurationExtension activated=true
INFO - class: org.apache.deltaspike.core.impl.exclude.extension.ExcludeExtension activated=true
INFO - class: org.apache.deltaspike.core.impl.exclude.CustomProjectStageBeanFilter activated=true
INFO - class: org.apache.deltaspike.core.impl.exclude.GlobalAlternative activated=true
INFO - class: org.apache.deltaspike.core.impl.jmx.MBeanExtension activated=true
INFO - class: org.apache.deltaspike.core.impl.scope.DeltaSpikeContextExtension activated=true
INFO - Computed the following DeltaSpike ProjectStage: Production
INFO - All injection points were validated successfully.
INFO - OpenWebBeans Container has started, it took 1051 ms.
INFO - Deployed Application(path=/Users/marcos.ferreira/Marcos/tomee/examples/deltaspike-i18n/a9dac2c3-841d-4954-b038-450896c63783.war)
INFO - Undeploying app: /Users/marcos.ferreira/Marcos/tomee/examples/deltaspike-i18n/a9dac2c3-841d-4954-b038-450896c63783.war
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.51 sec
INFO - Destroying container system

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0