shopping-cart
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#toc{border:0!important;text-align:left!important;padding:0!important;margin:0!important} body.book #toc,body.book #preamble,body.book h1.sect0,body.book .sect1>h2{page-break-before:always} .listingblock code[data-lang]::before{display:block} #footer{padding:0 .9375em} .hide-on-print{display:none!important} .print-only{display:block!important} .hide-for-print{display:none!important} .show-for-print{display:inherit!important}} @media print,amzn-kf8{#header>h1:first-child{margin-top:1.25rem} .sect1{padding:0!important} .sect1+.sect1{border:0} #footer{background:none} #footer-text{color:rgba(0,0,0,.6);font-size:.9em}} @media amzn-kf8{#header,#content,#footnotes,#footer{padding:0}} </style> </head> <body class="article"> <div id="header"> <h1>shopping-cart: EJB Stateful Session Bean (SFSB) Example</h1> <div class="details"> <span id="author" class="author">Serge Pagop</span><br> </div> </div> <div id="content"> <div id="preamble"> <div class="sectionbody"> <div class="quoteblock abstract"> <blockquote> The <code>shopping-cart</code> quickstart demonstrates how to deploy and run a simple Jakarta EE 8 shopping cart application that uses a stateful session bean (SFSB). </blockquote> </div> </div> </div> <div class="sect1"> <h2 id="_what_is_it">What is it?</h2> <div class="sectionbody"> <div class="paragraph"> <p>The <code>shopping-cart</code> quickstart demonstrates how to deploy and run a simple Jakarta EE 8 application that uses a stateful session bean (SFSB) in Red Hat JBoss Enterprise Application Platform. The application allows customers to buy, checkout, and view their cart contents.</p> </div> <div class="paragraph"> <p>The <code>shopping-cart</code> application consists of the following:</p> </div> <div class="olist arabic"> <ol class="arabic"> <li> <p>A server side component:</p> <div class="paragraph"> <p>This standalone Jakarta EE module is a JAR containing EJBs. It is responsible for managing the shopping cart.</p> </div> </li> <li> <p>A Java client:</p> <div class="paragraph"> <p>This simple Java client is launched using a <code>main</code> method. The remote client looks up a reference to the server module’s API, via JNDI. It then uses this API to perform the operations the customer requests.</p> </div> </li> </ol> </div> </div> </div> <div class="sect1"> <h2 id="system_requirements">System Requirements</h2> <div class="sectionbody"> <div class="paragraph"> <p>The application this project produces is designed to be run on Red Hat JBoss Enterprise Application Platform 7.4 or later.</p> </div> <div class="paragraph"> <p>All you need to build this project is Java 8.0 (Java SDK 1.8) or later and Maven 3.3.1 or later. See <a href="https://github.com/jboss-developer/jboss-developer-shared-resources/blob/master/guides/CONFIGURE_MAVEN_JBOSS_EAP.adoc#configure_maven_to_build_and_deploy_the_quickstarts">Configure Maven to Build and Deploy the Quickstarts</a> to make sure you are configured correctly for testing the quickstarts.</p> </div> </div> </div> <div class="sect1"> <h2 id="use_of_jboss_home_name">Use of the EAP_HOME and QUICKSTART_HOME Variables</h2> <div class="sectionbody"> <div class="paragraph"> <p>In the following instructions, replace <code><em>EAP_HOME</em></code> with the actual path to your JBoss EAP installation. The installation path is described in detail here: <a href="https://github.com/jboss-developer/jboss-developer-shared-resources/blob/master/guides/USE_OF_EAP_HOME.adoc#use_of_product_home_and_jboss_home_variables">Use of <em>EAP_HOME</em> and <em>JBOSS_HOME</em> Variables</a>.</p> </div> <div class="paragraph"> <p>When you see the replaceable variable <em>QUICKSTART_HOME</em>, replace it with the path to the root directory of all of the quickstarts.</p> </div> </div> </div> <div class="sect1"> <h2 id="back_up_standalone_server_configuration">Back Up the JBoss EAP Standalone Server Configuration</h2> <div class="sectionbody"> <div class="paragraph"> <p>Before you begin, back up your server configuration file.</p> </div> <div class="olist arabic"> <ol class="arabic"> <li> <p>If it is running, stop the JBoss EAP server.</p> </li> <li> <p>Back up the <code><em>EAP_HOME</em>/standalone/configuration/standalone.xml</code> file.</p> </li> </ol> </div> <div class="paragraph"> <p>After you have completed testing this quickstart, you can replace this file to restore the server to its original configuration.</p> </div> </div> </div> <div class="sect1"> <h2 id="start_the_eap_standalone_server">Start the JBoss EAP Standalone Server</h2> <div class="sectionbody"> <div class="olist arabic"> <ol class="arabic"> <li> <p>Open a terminal and navigate to the root of the JBoss EAP directory.</p> </li> <li> <p>Start the JBoss EAP server with the default profile by typing the following command.</p> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>$ <em>EAP_HOME</em>/bin/standalone.sh </code></pre> </div> </div> <div class="admonitionblock note"> <table> <tr> <td class="icon"> <div class="title">Note</div> </td> <td class="content"> For Windows, use the <code><em>EAP_HOME</em>\bin\standalone.bat</code> script. </td> </tr> </table> </div> </li> </ol> </div> </div> </div> <div class="sect1"> <h2 id="configure_the_server">Configure the Server</h2> <div class="sectionbody"> <div class="paragraph"> <p>This example quickstart purposely throws a <code>NoSuchEJBException</code> exception when the shopping cart is empty. This is the expected result because method is annotated with <code>@Remove</code>. This means the next invocation after the shopping cart checkout fails because the container has destroyed the instance and it is no longer available. If you do not run this script, you see the following ERROR in the server log, followed by the stacktrace</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>ERROR [org.jboss.as.ejb3.invocation] (EJB default - 7) WFLYEJB0034: EJB Invocation failed on component ShoppingCartBean for method public abstract java.util.Map org.jboss.as.quickstarts.sfsb.ShoppingCart.getCartContents(): javax.ejb.NoSuchEJBException: WFLYEJB0168: Could not find EJB with id UnknownSessionID [5168576665505352655054705267485457555457535250485552546568575254]</code></pre> </div> </div> <div class="paragraph"> <p>Follow the steps below to suppress system exception logging.</p> </div> <div class="olist arabic"> <ol class="arabic"> <li> <p>Before you begin, make sure you do the following:</p> <div class="ulist"> <ul> <li> <p><a href="#back_up_standalone_server_configuration">Back up the JBoss EAP standalone server configuration</a> as described above.</p> </li> <li> <p><a href="#start_the_eap_standalone_server">Start the JBoss EAP server with the standalone default profile</a> as described above.</p> </li> </ul> </div> </li> <li> <p>Review the <code>configure-system-exception.cli</code> file in the root of this quickstart directory. This script sets the <code>log-system-exceptions</code> attribute to <code>false</code> in the <code>ejb3</code> subsystem in the server configuration file.</p> </li> <li> <p>Open a new terminal, navigate to the root directory of this quickstart, and run the following command, replacing <em>EAP_HOME</em> with the path to your server:</p> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>$ <em>EAP_HOME</em>/bin/jboss-cli.sh --connect --file=configure-system-exception.cli</code></pre> </div> </div> <div class="admonitionblock note"> <table> <tr> <td class="icon"> <div class="title">Note</div> </td> <td class="content"> For Windows, use the <code><em>EAP_HOME</em>\bin\jboss-cli.bat</code> script. </td> </tr> </table> </div> <div class="paragraph"> <p>You should see the following result when you run the script:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>The batch executed successfully</code></pre> </div> </div> </li> <li> <p>Stop the JBoss EAP server.</p> </li> </ol> </div> </div> </div> <div class="sect1"> <h2 id="_review_the_modified_server_configuration">Review the Modified Server Configuration</h2> <div class="sectionbody"> <div class="paragraph"> <p>After stopping the server, open the <code><em>EAP_HOME</em>/standalone/configuration/standalone.xml</code> file and review the changes.</p> </div> <div class="paragraph"> <p>You should see the following configuration in the <code>ejb3</code> subsystem.</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code class="language-xml" data-lang="xml"><log-system-exceptions value="false"/></code></pre> </div> </div> </div> </div> <div class="sect1"> <h2 id="build_and_deploy_the_quickstart">Build and Deploy the Quickstart</h2> <div class="sectionbody"> <div class="olist arabic"> <ol class="arabic"> <li> <p>Make sure you <a href="#start_the_eap_standalone_server">start the JBoss EAP server</a> as described above.</p> </li> <li> <p>Open a terminal and navigate to the root directory of this quickstart.</p> </li> <li> <p>Type the following command to build the artifacts.</p> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>$ mvn clean install wildfly:deploy</code></pre> </div> </div> </li> </ol> </div> <div class="paragraph"> <p>This deploys the <code>shopping-cart/server/target/shopping-cart.jar</code> to the running instance of the server.</p> </div> <div class="paragraph"> <p>You should see a message in the server log indicating that the archive deployed successfully.</p> </div> <div class="paragraph"> <p>You can also check the server console to see information messages regarding the deployment.</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>INFO [org.jboss.as.ejb3.deployment] (MSC service thread 1-2) WFLYEJB0473: JNDI bindings for session bean named 'ShoppingCartBean' in deployment unit 'deployment "{artifactId}-server.jar"' are as follows: java:global/{artifactId}-server/ShoppingCartBean!org.jboss.as.quickstarts.sfsb.ShoppingCart java:app/{artifactId}-server/ShoppingCartBean!org.jboss.as.quickstarts.sfsb.ShoppingCart java:module/ShoppingCartBean!org.jboss.as.quickstarts.sfsb.ShoppingCart java:jboss/exported/{artifactId}-server/ShoppingCartBean!org.jboss.as.quickstarts.sfsb.ShoppingCart java:global/{artifactId}-server/ShoppingCartBean java:app/{artifactId}-server/ShoppingCartBean java:module/ShoppingCartBean INFO [org.jboss.weld.deployer] (MSC service thread 1-4) WFLYWELD0006: Starting Services for CDI deployment: {artifactId}-server.jar INFO [org.jboss.weld.deployer] (MSC service thread 1-8) WFLYWELD0009: Starting weld service for deployment {artifactId}-server.jar INFO [org.jboss.as.server] (management-handler-thread - 3) WFLYSRV0010: Deployed "{artifactId}-server.jar" (runtime-name : "{artifactId}-server.jar")</code></pre> </div> </div> </div> </div> <div class="sect1"> <h2 id="_run_the_client_application">Run the Client Application</h2> <div class="sectionbody"> <div class="paragraph"> <p>Now start a client that will access the beans you just deployed.</p> </div> <div class="paragraph"> <p>You can use the terminal from the previous step or open a new one and navigate to the root of the <code>shopping-cart</code> quickstart directory.</p> </div> <div class="paragraph"> <p>Type the following command:</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>$ mvn exec:java -f client/pom.xml</code></pre> </div> </div> </div> </div> <div class="sect1"> <h2 id="_investigate_the_console_output">Investigate the Console Output</h2> <div class="sectionbody"> <div class="paragraph"> <p>You should see the following:</p> </div> <div class="olist arabic"> <ol class="arabic"> <li> <p>The client sends a remote method invocation to the stateful session bean to buy two <code>32 GB USB 2.0 Flash Drive</code> and one <code>Wireless Ergonomic Keyboard and Mouse</code>.</p> </li> <li> <p>The client sends a remote method invocation to get the contents of the cart and prints it to the console.</p> </li> <li> <p>The client sends a remote method invocation to invoke checkout. Note the <code>checkout()</code> method in the server <code>ShoppingCartBean</code> has the <code>@Remove</code> annotation. This means the container will destroy shopping cart after the call and it will no longer be available.</p> </li> <li> <p>The client calls <code>getCartContents()</code> to make sure the shopping cart was removed after checkout. This results in a <code>javax.ejb.NoSuchEJBException</code> trace in the server, proving the cart was removed.</p> </li> <li> <p>On the client console, you should see output similar to:</p> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& Obtained the remote interface to the shopping cart Buying a "32 GB USB 2.0 Flash Drive". Buying another "32 GB USB 2.0 Flash Drive". Buying a "Wireless Ergonomic Keyboard and Mouse" Print cart: 1 Wireless Ergonomic Keyboard and Mouse 2 32 GB USB 2.0 Flash Drive Checkout Cart was correctly removed, as expected, after Checkout &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&</code></pre> </div> </div> </li> <li> <p>In the server log, you should see:</p> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>INFO [stdout] (pool-9-thread-8) implementing checkout() left as exercise for the reader!</code></pre> </div> </div> </li> </ol> </div> </div> </div> <div class="sect1"> <h2 id="undeploy_the_quickstart">Undeploy the Quickstart</h2> <div class="sectionbody"> <div class="paragraph"> <p>When you are finished testing the quickstart, follow these steps to undeploy the archive.</p> </div> <div class="olist arabic"> <ol class="arabic"> <li> <p>Make sure you <a href="#start_the_eap_standalone_server">start the JBoss EAP server</a> as described above.</p> </li> <li> <p>Open a terminal and navigate to the root directory of this quickstart.</p> </li> <li> <p>Type this command to undeploy the archive:</p> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>$ mvn wildfly:undeploy</code></pre> </div> </div> </li> </ol> </div> </div> </div> <div class="sect1"> <h2 id="restore_the_standalone_server_configuration">Restore the JBoss EAP Standalone Server Configuration</h2> <div class="sectionbody"> <div class="paragraph"> <p>You can restore the original server configuration using either of the following methods.</p> </div> <div class="ulist"> <ul> <li> <p>You can <a href="#restore_standalone_server_configuration_using_cli">run the <code>restore-system-exception.cli</code> script</a> provided in the root directory of this quickstart.</p> </li> <li> <p>You can <a href="#restore_standalone_server_configuration_manually">manually restore the configuration</a> using the backup copy of the configuration file.</p> </li> </ul> </div> <div class="sect2"> <h3 id="restore_standalone_server_configuration_using_cli">Restore the JBoss EAP Standalone Server Configuration by Running the JBoss CLI Script</h3> <div class="olist arabic"> <ol class="arabic"> <li> <p><a href="#start_the_eap_standalone_server">Start the JBoss EAP server</a> as described above.</p> </li> <li> <p>Open a new terminal, navigate to the root directory of this quickstart, and run the following command, replacing <code><em>EAP_HOME</em></code> with the path to your server:</p> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>$ <em>EAP_HOME</em>/bin/jboss-cli.sh --connect --file=restore-system-exception.cli</code></pre> </div> </div> <div class="admonitionblock note"> <table> <tr> <td class="icon"> <div class="title">Note</div> </td> <td class="content"> For Windows, use the <code><em>EAP_HOME</em>\bin\jboss-cli.bat</code> script. </td> </tr> </table> </div> </li> </ol> </div> <div class="paragraph"> <p>This script restores the the <code>log-system-exceptions</code> attribute value to <code>true</code>. You should see the following result when you run the script:</p> </div> <div class="paragraph"> <p>+</p> </div> <div class="listingblock"> <div class="content"> <pre class="highlight nowrap"><code>The batch executed successfully</code></pre> </div> </div> </div> <div class="sect2"> <h3 id="restore_standalone_server_configuration_manually">Restore the JBoss EAP Standalone Server Configuration Manually</h3> <div class="paragraph"> <p>When you have completed testing the quickstart, you can restore the original server configuration by manually restoring the backup copy the configuration file.</p> </div> <div class="olist arabic"> <ol class="arabic"> <li> <p>If it is running, stop the JBoss EAP server.</p> </li> <li> <p>Replace the <code><em>EAP_HOME</em>/standalone/configuration/standalone.xml</code> file with the backup copy of the file.</p> </li> </ol> </div> </div> </div> </div> <div class="sect1"> <h2 id="run_the_quickstart_in_redhat_codeready_studio_or_eclipse">Run the Quickstart in Red Hat CodeReady Studio or Eclipse</h2> <div class="sectionbody"> <div class="paragraph"> <p>You can also start the server and deploy the quickstarts or run the Arquillian tests in Red Hat CodeReady Studio or from Eclipse using JBoss tools. For general information about how to import a quickstart, add a JBoss EAP server, and build and deploy a quickstart, see <a href="https://github.com/jboss-developer/jboss-developer-shared-resources/blob/master/guides/USE_JBDS.adoc#use_red_hat_jboss_developer_studio_or_eclipse_to_run_the_quickstarts">Use Red Hat CodeReady Studio or Eclipse to Run the Quickstarts</a>.</p> </div> <div class="paragraph"> <p>This quickstart consists of multiple projects, so it deploys and runs differently in Red Hat CodeReady Studio than the other quickstarts.</p> </div> <div class="ulist"> <ul> <li> <p>Make sure you configure JBoss EAP to suppress system exception logging as described above under <a href="#configure_the_server">Configure the Server</a>. Stop the server at the end of that step.</p> </li> <li> <p>To deploy the server project, right-click on the <strong>shopping-cart-server</strong> project and choose <strong>Run As</strong> –> <strong>Run on Server</strong>.</p> </li> <li> <p>To run the client, right-click on the <strong>shopping-cart-client</strong> project and choose <strong>Run As</strong> –> <strong>Java Application</strong>. In the <strong>Select Java Application</strong> window, choose <strong>Client - org.jboss.as.quickstarts.client</strong> and click <strong>OK</strong>. The client output displays in the <strong>Console</strong> window.</p> </li> <li> <p>To undeploy the project, right-click on the <strong>shopping-cart-server</strong> project and choose <strong>Run As</strong> –> <strong>Maven build</strong>. Enter <code>wildfly:undeploy</code> for the <strong>Goals</strong> and click <strong>Run</strong>.</p> </li> <li> <p>Make sure you <a href="#restore_the_server_configuration">restore the JBoss EAP standalone server configuration</a> when you have completed testing this quickstart.</p> </li> </ul> </div> </div> </div> <div class="sect1"> <h2 id="debug_the_application">Debug the Application</h2> <div class="sectionbody"> <div class="paragraph"> <p>If you want to debug the source code of any library in the project, run the following command to pull the source into your local repository. The IDE should then detect it.</p> </div> <div class="listingblock"> <div class="content"> <pre>$ mvn dependency:sources</pre> </div> </div> </div> </div> <div class="sect1"> <h2 id="openshift_incompatibility">JBoss EAP for OpenShift Incompatibility</h2> <div class="sectionbody"> <div class="paragraph"> <p>This quickstart is not compatible with JBoss EAP for OpenShift or JBoss EAP for OpenShift Online templates.</p> </div> </div> </div> </div> <div id="footer"> <div id="footer-text"> Last updated 2021-06-23 15:53:26 UTC </div> </div> </body> </html>