Package javax.ejb

Annotation Interface EJB

@Target({TYPE,METHOD,FIELD}) @Retention(RUNTIME) public @interface EJB
Indicates a dependency on the local, no-interface, or remote view of an Enterprise JavaBean.

Either the beanName or the lookup element can be used to resolve the EJB dependency to its target session bean component. It is an error to specify values for both beanName and lookup.

If no explicit linking information is provided and there is only one session bean within the same application that exposes the matching client view type, by default the EJB dependency resolves to that session bean.

Since:
EJB 3.0

  • Optional Element Summary

    Optional Elements
    Modifier and Type
    Optional Element
    Description
    Class
    beanInterface
    The interface type of the Enterprise Java Bean to which this reference is mapped.
    String
    beanName
    The beanName element references the value of the name element of the Stateful or Stateless annotation, whether defaulted or explicit.
    String
    description
    A string describing the bean.
    String
    lookup
    A portable lookup string containing the JNDI name for the target EJB component.
    String
    mappedName
    The product specific name of the EJB component to which this ejb reference should be mapped.
    String
    name
    The logical name of the ejb reference within the declaring component's (e.g., java:comp/env) environment.

  • Element Details

    • name

      String name
      The logical name of the ejb reference within the declaring component's (e.g., java:comp/env) environment.
      Default:
      ""

    • description

      String description
      A string describing the bean.
      Default:
      ""

    • beanName

      String beanName
      The beanName element references the value of the name element of the Stateful or Stateless annotation, whether defaulted or explicit. If the deployment descriptor was used to define the name of the bean, the beanName element references the ejb-name element of the bean definition.

      The beanName element allows disambiguation if multiple session beans in the ejb-jar implement the same interface.

      In order to reference a bean in another ejb-jar file in the same application, the beanName may be composed of a path name specifying the ejb-jar containing the referenced bean with the bean name of the target bean appended and separated from the path name by #. The path name is relative to the jar file containing the component that is referencing the target bean.

      Only applicable if the target EJB is defined within the same application or stand-alone module as the declaring component.

      Default:
      ""

    • beanInterface

      Class beanInterface
      The interface type of the Enterprise Java Bean to which this reference is mapped.

      Holds one of the following types of the target EJB :

      • Local business interface
      • Bean class (for no-interface view)
      • Remote business interface
      • Local Home interface
      • Remote Home interface
      Default:
      java.lang.Object.class

    • mappedName

      String mappedName
      The product specific name of the EJB component to which this ejb reference should be mapped. This mapped name is often a global JNDI name, but may be a name of any form.

      Application servers are not required to support any particular form or type of mapped name, nor the ability to use mapped names. The mapped name is product-dependent and often installation-dependent. No use of a mapped name is portable.

      Default:
      ""

    • lookup

      String lookup
      A portable lookup string containing the JNDI name for the target EJB component.
      Since:
      EJB 3.1
      Default:
      ""