WebSphere Application Server V8.5 Concepts, Planning, and Design Guide

350 WebSphere Application Server V8.5 Concepts, Planning, and Design Guide

Figure 11-2 depicts an EJB OSGi bundle. An EJB bundle includes the EJB module along with

its OSGi metadata. It is then deployed as an OSGi bundle in an OSGi application.

Figure 11-2 EJB OSGi bundle

Application development and deployment support

OSGi bundles are packaged as JAR files. A single OSGi application is packaged in an

enterprise bundle archive (EBA) file, just as an enterprise application is packaged in an

enterprise archive file. WebSphere Application Server also supports deploying existing WAR

files as web application bundles to facilitate the use of an OSGi module system.

OSGi application development support is provided in IBM Rational Application Developer

V8.5 and WebSphere Developer Tools. OSGi application can be deployed to WebSphere

Application Server by using either the administrative console or wsadmin commands.

For more information about developing OSGi applications in WebSphere Application Server

V8.5, see:

http://www14.software.ibm.com/webapp/wsbroker/redirect?version=phil&product=was-nd

-mp&topic=thread_ta_dev_devdepeba

11.2.3 Business-level applications

A business-level application is an application beyond the Java EE definition. A business-level

application is an administration model that provides the entire definition of an application as it

makes sense to the business. A business-level application is a WebSphere configuration

artifact, similar to a server or cluster, that is stored in the product configuration repository.

This grouping notion for enterprise level applications includes WebSphere and

OSGi Application

webA.jar (WAB)

EAR

webA.war

webB.war

ejbA.jar

ejbB.jar

utilityA.jar

utilityB.jar

webB.jar (WAB)

Bundle (ejb.jar)

ejbA.jar

ejbB.jar

utilityA.jar

utilityB.jar

utilityC.jar

utilityC.jar

Manifest-Version: 1.0

Bundle-ManifestVersion: 2

Bundle-Name: Blog Biz

Bundle-SymbolicName: com.ibm.blog.biz

Export-EJB:

Bundle-Version: 1.0.0

Import-Package: javax.ejb;version="3.0",

com.ibm.blog.api;version="[1.0, 1.1)"

NEW!

Chapter 11. Application development and deployment 351

non-WebSphere artifacts, such as SCA packages, libraries, and proxy filters, under a single

application definition. Business-level applications do not introduce new programming,

runtime, or packaging models. You do not need to change application business logic or

runtime settings. Figure 11-3 shows business-level applications.

Figure 11-3 Business-level applications

A business-level application has the following characteristics:

 Lists one or more composition units that represent the application binary files.

 Might not explicitly manage the lifecycle of every artifact.

 Is a model that defines an application.

 Does not represent or contain application binary files.

 Can span more than WebSphere Application Server deployment target run times.

Examples include a proxy server, a web server, and WebSphere Application Server

Community Edition.

 Provides installation, distribution, activation, monitor, update, and removal management

features for applications.

 Supports application service provider (ASP) scenarios by allowing single application

binary files to be shared between multiple deployments.

 Aligns WebSphere applications closer with business as opposed to IT configuration.

In summary, a business-level application can be useful when an application has the following

characteristics:

 Is composed of multiple packages.

 Applies to the post-deployment side of the application lifecycle.

 Contains additional libraries or non-Java EE artifacts.

 Includes artifacts that run on heterogeneous environments that include WebSphere and

non-WebSphere run times.

 Is defined in a recursive manner (for example, if an application includes other

applications).

BLA1

EJB

module

Web

module

BLA3 BLA2

Java EE

Enterprise

application

Business

Logic

Configuration

Composition

JAX-WS

Web

service

module

Portlet

module

Java

library

DB2

database

CICS

transaction

Java

library

WARJAR Axis2 PAR JAR EAR