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| |
| <h1>Details on openejb-jar</h1> |
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| </div> |
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| <h1 id="_what_is_an_openejb_jar_xml" class="sect0">What is an openejb-jar.xml?</h1> |
| <div class="paragraph"> |
| <p>This is the file created by the Deploy Tool that maps your bean’s |
| deployment descriptor (ejb-jar.xml) to actual containers and resources |
| declared in your OpenEJB configuration (openejb.conf). In fact, the |
| Deploy tool really does nothing more than create this file and put it in |
| your jar, that’s it.</p> |
| </div> |
| <h1 id="_when_is_the_openejb_jar_xml_used" class="sect0">When is the openejb-jar.xml used?</h1> |
| <div class="paragraph"> |
| <p>At startup, any jar containing a openejb-jar.xml is loaded by the |
| container system. The configuration tools will go looking in all the |
| directories and jars you have declared in your openejb.conf with the |
| element. For every jar file it finds, it will look inside for an |
| openejb-jar.xml. If it finds one, it will attempt to load and deploy it |
| into the container system.</p> |
| </div> |
| <h1 id="_do_i_even_need_the_deploy_tool_then" class="sect0">Do I even need the deploy tool then?</h1> |
| <div class="paragraph"> |
| <p>Nope. Typically you would only use the deploy tool to create your |
| openejb-jar.xml, then just keep your openejb-jar.xml in your CVS (or |
| other repository). If you learn how to maintain this openejb-jar.xml |
| file, you’ll never need the deploy tool again! You can do all your |
| builds and deploys automatically.</p> |
| </div> |
| <h1 id="_where_do_i_put_the_openejb_jar_xml_in_my_jar" class="sect0">Where do I put the openejb-jar.xml in my jar?</h1> |
| <div class="paragraph"> |
| <p>The openejb-jar.xml file just goes in the META-INF directory of your jar |
| next to the ejb-jar.xml file.</p> |
| </div> |
| <h1 id="_is_the_file_format_easy" class="sect0">Is the file format easy?</h1> |
| <div class="paragraph"> |
| <p>If you can understand the ejb-jar.xml, the openejb-jar.xml should be a |
| breeze.</p> |
| </div> |
| <div class="paragraph"> |
| <p>This is the openejb-jar.xml that is created by the Deploy tool in the |
| Hello World example. As you can see, the file format is extremely |
| simple.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-xml" data-lang="xml"><?xml version="1.0"?> |
| <openejb-jar xmlns="http://www.openejb.org/openejb-jar/1.1"> |
| <ejb-deployment ejb-name="Hello" |
| deployment-id="Hello" |
| container-id="Default Stateless Container"/> |
| </openejb-jar></code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>The <em>ejb-name</em> attribute is the name you gave the bean in your |
| ejb-jar.xml. The <em>deployment-id</em> is the name you want to use to lookup |
| the bean in your client’s JNDI namespace. The <em>container-id</em> is the name |
| of the container in your openejb.conf file that you would like the bean |
| to run in. There MUST be one <em>ejb-deployment</em> element for each EJB in |
| your jar.</p> |
| </div> |
| <div class="sect1"> |
| <h2 id="_what_if_my_bean_uses_a_jdbc_datasource">What if my bean uses a JDBC datasource?</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Then you simply add a element to your element like this</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-xml" data-lang="xml"><?xml version="1.0"?> |
| <openejb-jar xmlns="http://www.openejb.org/openejb-jar/1.1"> |
| |
| <ejb-deployment ejb-name="Hello" |
| deployment-id="Hello" |
| container-id="Default Stateless Container" > |
| |
| <resource-link res-ref-name="jdbc/basic/entityDatabase" |
| res-id="Default JDBC Database"/> |
| |
| </ejb-deployment> |
| |
| </openejb-jar></code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>The <em>res-ref-name</em> attribute refers to the element of the bean’s |
| declaration in the ejb-jar.xml. The <em>res-id</em> attribute refers to the id |
| of the declared in your openejb.conf that will handle the connections |
| and provide access to the desired resource.</p> |
| </div> |
| </div> |
| </div> |
| <h1 id="_how_many_resource_link_elements_will_i_need" class="sect0">How many resource-link elements will I need?</h1> |
| <div class="paragraph"> |
| <p>You will need one element for every element in your ejb-jar.xml. So if |
| you had an ejb-jar.xml like the following</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-xml" data-lang="xml"><?xml version="1.0"?> |
| <ejb-jar> |
| <enterprise-beans> |
| <session> |
| <ejb-name>MyExampleBean</ejb-name> |
| <home>com.widget.ExampleHome</home> |
| <remote>com.widget.ExampleObject</remote> |
| <ejb-class>com.widget.ExampleBean</ejb-class> |
| <session-type>Stateless</session-type> |
| <transaction-type>Container</transaction-type> |
| |
| <resource-ref> |
| <description> |
| This is a reference to a JDBC database. |
| </description> |
| <res-ref-name>jdbc/myFirstDatabase</res-ref-name> |
| <res-type>javax.sql.DataSource</res-type> |
| <res-auth>Container</res-auth> |
| </resource-ref> |
| |
| <resource-ref> |
| <description> |
| This is another reference to a JDBC database. |
| </description> |
| <res-ref-name>jdbc/anotherDatabase</res-ref-name> |
| <res-type>javax.sql.DataSource</res-type> |
| <res-auth>Container</res-auth> |
| </resource-ref> |
| |
| </session> |
| </enterprise-beans> |
| </ejb-jar></code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Then you would need two elements for that bean in your openejb-jar.xml |
| file as such.</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlight"><code class="language-xml" data-lang="xml"><?xml version="1.0"?> |
| <openejb-jar xmlns="http://www.openejb.org/openejb-jar/1.1"> |
| |
| <ejb-deployment ejb-name="MyExampleBean" |
| deployment-id="MyExampleBean" |
| container-id="Default Stateless Container" > |
| |
| <resource-link res-ref-name="jdbc/myFirstDatabase" |
| res-id="My Oracle JDBC Database"/> |
| |
| <resource-link res-ref-name="jdbc/anotherDatabase" |
| res-id="My PostgreSQL JDBC Database"/> |
| |
| </ejb-deployment> |
| |
| </openejb-jar></code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>This would require two declarations in your openejb.conf, one with the |
| <em>id</em> attribute set to <em>"My Oracle JDBC Database"</em> , and another with |
| it’s <em>id</em> attribute set to <em>"My PostgreSQL JDBC Database"</em></p> |
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