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Listing 2.15 contains the UserBean from recipe 2.6 with additional JavaDoc comments (shown in bold) to create security constraints in the generated XML deployment descriptor.
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Listing 2.15 Declaring security roles in the source code
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/** * @ejb.bean type="Stateful" * view-type="both" * jndi-name="${user.bean.jndi}" * * @ejb.security-role-ref * role-name="ADMIN" * role-link="administrator" * */ public class UserBean implements SessionBean{
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You must also be sure that your <ejbdoclet/> task in the build.xml file includes the correct subtask to generate the deployment XML file (see recipe 2.3).
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As you can see, there is nothing too complicated about specifying security roles. In addition, you can use the @ejb.security-identity tag to declare the bean to assume a role when it acts as a client to another bean. This tag has the attributes user-caller-identity and run-as, which correspond to the XML elements you should recognize.
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2.3 Keeping your EJB deployment descriptor current 2.8 Generating vendor-specific deployment descriptors 2.10 Generating and maintaining method permissions
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2.10 Generating and maintaining method permissions
Problem
You would like to automate the permission-creation method in the deployment XML. You also want the XML to change as your EJB methods and security roles change.
Generating and maintaining method permissions
Background
In addition to needing security roles in the EJB deployment XML, EJB applications usually need method permissions based on those roles in order to provide access control to various EJB methods. As EJBs change, and as new EJBs are created, the method permissions created in the deployment descriptor must also change. In addition, as you create new methods (or new security roles), you will have to add method permissions in the XML.
Recipe
Use the @ejb.permission tag in the method-level JavaDoc comments to specify method permissions for specific methods. This tag must be used in combination with @ejb.create-method or @ejb.interface-method. Refer to recipe 2.1 for more information on those tags. The UserBean source subsection in listing 2.16 shows a single method declaring method permissions (highlighted in bold).
Listing 2.16 UserBean.java
package ch2; import javax.ejb.*; /** * @ejb.bean type="Stateful" * view-type="both" * jndi-name="${user.bean.jndi}" * */ public class UserBean implements SessionBean{ private String name = null; /** * @ejb.interface-method * @ejb.permission * unchecked="true"; */ public void setUserName( String name ) { this.name = name; } }
Discussion
When using the @ejb.permission tag, you can use the role-name attribute to specify a specific role for the method permission or the unchecked attribute to indicate
Code generation with XDoclet
universal access. The role-name attribute can have a single role name value, or it can be a comma-separated list of role names that can access the method. The use of the @ejb.permission tag, along with others in this chapter, helps you to more completely generate your ejb-jar.xml for deploying your EJBs. This tag must be used with @ejb.create-method or @ejb.interface-method so that XDoclet knows with which method the permission is associated. To that end, you must include the subtask <deploymentdescriptor/> in your build.xml file in order to generate any new XML. The generated XML will differ depending on which EJB interfaces you are generating. If you generate both, you should see XML for the method permission generated for both view types.
See also
2.1 Generating home, remote, local, and local home interfaces 2.3 Keeping your EJB deployment descriptor current 2.8 Generating vendor-specific deployment descriptors 2.9 Specifying security roles in the bean source
2.11 Generating finder methods for entity home interfaces
Problem
You want to generate the finder method declaration as part of the home interface generation process.
Background
Recipe 2.1 shows how to generate home (and other) interfaces for session and entity beans. In that recipe, we add creation methods to the home interface. In the case of entity beans, home interfaces often need to include finder methods. Adding these finder methods requires time-consuming changes to the interface and may cause file synchronization problems, as described in recipe 2.1.
Recipe
To generate the finder method declaration, use the @ejb.finder tag in the classlevel JavaDoc of your bean source. For example, the following class section of
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