https://github.com/mrts/local-ejb-injection

Sample project demonstrating packaging EJB JARs and WARs into EAR
https://github.com/mrts/local-ejb-injection

ear ejb ejb-jar servlet war

Last synced: 7 months ago
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Sample project demonstrating packaging EJB JARs and WARs into EAR

• Host: GitHub
• URL: https://github.com/mrts/local-ejb-injection
• Owner: mrts
• Created: 2016-08-26T18:13:40.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2016-08-26T18:17:48.000Z (about 9 years ago)
• Last Synced: 2025-01-28T05:14:17.723Z (8 months ago)
• Topics: ear, ejb, ejb-jar, servlet, war
• Language: Java
• Size: 3.91 KB
• Stars: 4
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# local-ejb-injection

This is a sample project demonstrating injecting EJBs from EJB JARs into web

applications packaged as WARs inside a master EAR.

Here's how the result looks:

    application-ear.ear

    ├── service-ejb-impl.jar

    ├── web-application.war

    ├── lib

    │   └── service-ejb-api.jar

    └── META-INF

        ├── MANIFEST.MF

        └── application.xml

Here’s a usage scenario:

You have a web application packaged as a WAR that needs to use EJB services

that cannot be packaged into the WAR as they are used by other WARs in the EAR.

You annotate the service interface with `@Local`, extract it into a separate

API JAR and reference the API JAR from both the WAR and EAR projects. Then you

implement the service in an EJB JAR that is packaged into the EAR and inject

the interface with `@EJB` annotation as an instance field into a servlet in the

WAR.

It’s a Maven project with the following modules:

* *web-application* – servlet that calls the EJB service, open

   to access it

* *service-ejb-api* – service interface with `@Local` annotation

* *service-ejb-impl* – `@Stateless` EJB that implements the service interface

* *application-ear* – packages the EJB JAR into an EAR.

Build it with `mvn package` and deploy

`application-ear/target/application-ear.ear` to the application server to run

it.