Jakarta EE ejb-jar.xml Dosyası

ejb-jar.xml Dosyası

Açıklaması şöyle. Yani EJB 3.x kullanıyorsak bu dosyaya gerek olmayabilir.

EJB 3 beans can be configured with annotations in Java Code, Deployment Descriptors in ejb-jar.xml and a mix of both of them. 

Eğer kullanacaksak şeklen şöyle

Bu dosyanın yerine META-INF altında yani şöyle

META-INF
  - ejb-jar.xml
  - ...

EJB 3.1 için XML içinde "ejb-jar_3_1.xsd" kullanılır

İskeleti şöyle. 

<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         version="3.1"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                             http://java.sun.com/xml/ns/javaee/ejb-jar_3_1.xsd">
  ...
</ejb-jar>  

Örnek - MDB

Şöyle yaparız. Burada MDB için transaction desteği iptal ediliyor.

<ejb-jar ...>
  <display-name>My Message Driven Bean</display-name>

  <enterprise-beans>
    <message-driven>
      <display-name>MY_MDB</display-name>
      <ejb-name>MY_MDB</ejb-name>
      <ejb-class>com.foo.MessageBean</ejb-class>
      <messaging-type>com.foo.InboundMessageEndpoint</messaging-type>
      <transaction-type>Container</transaction-type>
    </message-driven>
  </enterprise-beans>

  <assembly-descriptor>
    <container-transaction>
      <method>
        <ejb-name>MY_MDB</ejb-name>
        <method-name>*</method-name>
      </method>
      <trans-attribute>NotSupported</trans-attribute>
    </container-transaction>
  </assembly-descriptor>

</ejb-jar>

Örnek - Session Bean

Şöyle yaparız.

<ejb-jar xmlns = "http://java.sun.com/xml/ns/javaee"
  version = "3.1"
  xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation = "http://java.sun.com/xml/ns/javaee 
                        http://java.sun.com/xml/ns/javaee/ejb-jar_3_1.xsd">
  <enterprise-beans>
    
    <session>
      <ejb-name>MessageFacade</ejb-name>
      <local-bean/>
      <ejb-class>com.foo.MessageFacade</ejb-class>
      <session-type>Stateless</session-type>
    </session>

  </enterprise-beans>
</ejb-jar>

Burada artık kodda anotasyon kullanmaya gerek yok. Şöyle yaparız

public class MessageFacade {
  public String hello(){
    return "Working without annotations";
  }
}

public class FrontController extends HttpServlet {
  @EJB
  MessageFacade facade;
  ...
}

jboss-ejb3.xml Dosyası

Bu dosyanın ismi eskiden jboss.xml idi. Açıklaması şöyle

jboss-ejb3.xml is a custom deployment descriptor that can be placed in either ejb-jar or war archives. If it is placed in an ejb-jar then it must be placed in the META-INF folder, in a web archive it must be placed in the WEB-INF folder.

The contents of jboss-ejb3.xml are merged with the contents of ejb-jar.xml, with the jboss-ejb3.xml items taking precedence.

Örnek

Şöyle yaparız

<jboss xmlns="http://www.jboss.com/xml/ns/javaee"   
    xmlns:jee="http://java.sun.com/xml/ns/javaee"  
    xmlns:mdb="urn:resource-adapter-binding"  
    xmlns:security="urn:security:1.1">  
  
    <jee:assembly-descriptor>  
        <mdb:resource-adapter-binding>  
            <jee:ejb-name>MY_MDB</jee:ejb-name>  
            <mdb:resource-adapter-name>myEar.ear#batchFileRA</mdb:resource-adapter-name>  
        </mdb:resource-adapter-binding>  
    </jee:assembly-descriptor>  
</jboss>