include::../shared-doc/attributes.adoc[]

= helloworld-singleton: Helloworld Using a Singleton EJB
:author: Serge Pagop
:level: Beginner
:technologies: EJB, Singleton

[abstract]
The `helloworld-singleton` quickstart demonstrates an EJB Singleton Bean that is instantiated once and maintains state for the life of the session.

:standalone-server-type: default
:archiveType: war

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// Shared CD and Product Release content
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== What is it?

The `helloworld-singleton` quickstart demonstrates the use of an EJB Singleton Bean in {productNameFull}. It is instantiated once and maintains its state for the life of the session.

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// Product Release content only
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ifndef::EAPCDRelease[]

// System Requirements
include::../shared-doc/system-requirements.adoc[leveloffset=+1]
// Use of {jbossHomeName}
include::../shared-doc/use-of-jboss-home-name.adoc[leveloffset=+1]
// Start the {productName} Standalone Server
include::../shared-doc/start-the-standalone-server.adoc[leveloffset=+1]
// Build and Deploy the Quickstart
include::../shared-doc/build-and-deploy-the-quickstart.adoc[leveloffset=+1]

== Access the Application

The application will be running at the following URL: http://localhost:8080/{artifactId}/.

This example demonstrates a singleton session bean that maintains state information for 2 variables: `Increment A` and `Increment B`.

A counter is incremented when you click on the link to the variable name. If you close and restart your browser, or if you have multiple browsers, you can see that the counter always increments the last value. These values are maintained until you restart the server.

To test the singleton bean, click on either *Increment A* or *Increment B*. The result page will give you the current value of the variable.

// Undeploy the Quickstart
include::../shared-doc/undeploy-the-quickstart.adoc[leveloffset=+1]
// Run the Quickstart in Red Hat JBoss Developer Studio or Eclipse
include::../shared-doc/run-the-quickstart-in-jboss-developer-studio.adoc[leveloffset=+1]
// Debug the Application
include::../shared-doc/debug-the-application.adoc[leveloffset=+1]

endif::[]

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// CD Release content only
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ifdef::EAPCDRelease[]

// Getting Started with OpenShift
include::../shared-doc/cd-openshift-getting-started.adoc[leveloffset=+1]
//Prepare OpenShift for Quickstart Deployment
include::../shared-doc/cd-create-project.adoc[leveloffset=+1]
// Import the Latest {xpaasproduct-shortname} Image Streams and Templates
include::../shared-doc/cd-import-imagestreams-templates.adoc[leveloffset=+1]
// Deploy the {ProductShortName} Source-to-Image (S2I) Quickstart to OpenShift
include::../shared-doc/cd-deploy-project.adoc[leveloffset=+1]
// OpenShift Post Deployment Tasks: This is not currently needed.
// include::../shared-doc/cd-post-deployment-tasks.adoc[leveloffset=+1]

endif::[]
