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Editing module-wide nodes Server-specific pages As you work with the DD editor, you are likely to find pages available with fields that are specific just to your server. If this is the case and you need help filling in the fields on these server-specific pages, display one of the pages and press F1. You will get a context-sensitive help screen. You should also refer to your server documentation about the specific requirements for your server. 140 Developing Applications with Enterprise JavaBeans
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Editing module-wide nodes 6 In the Interface field, use the drop-down list to select Home, Remote, Local Home, or Local to indicate which interface you are working with. Your selection in this field determines which methods are available to you in the Name field. 7 In the Name field, use the drop-down list to select the name of the method the selected security roles can call. 8 If there is a method with the same name in the bean as another but with a different method signature, use the drop-down list to select the parameters of the method to identify the correct method. 9 As a final step, enter a description of this container transaction. This step is optional. Adding a method to the exclude list Methods that are added to the exclude list are methods that should not be called. To add a method to the exclude list, follow these steps: 1 Expand the Exclude List node in the structure pane of the DD editor and double- click the Exclude List Methods node. 2 Right-click the Exclude List Methods node and choose Add. Or you can click the Add button on the Exclude List page, select the *(*) entry added, and click the Edit button. An Exclude List Method page appears: 3 From the drop-down EJB Name list, select a bean that contains the method you don t want called. 4 In the Interface field, use the drop-down list to select Home, Remote, Local Home, or Local to indicate which interface you are working with. Your selection in this field determines which methods are available to you in the Name field. 5 In the Name field, use the drop-down list to select the name of the method the selected security roles can call. 6 If there is a method with the same name in the bean as another but with a different method signature, use the drop-down list to select the parameters of the method to identify the correct method. 7 As a final step, enter a description of this excluded method. This step is optional. Chapter 13: Editing EJB deployment descriptors 139
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Editing module-wide nodes To specify a method as a container-managed transaction, 1 Right-click the Container Transactions node in the structure pane of the DD editor and choose Add. This adds a Required node to the structure pane. 2 If the transaction attribute for the method is something other than Required, select the proper attribute from the Transaction Attribute drop-down list. Selecting another transaction type changes the name of the Required node in the structure pane. You can also provide an optional description in the Description field. 3 Expand the new transaction attribute node in the structure pane and double-click the Container Transaction Methods node under it to display a list of all methods that have this transaction attribute. Of course, when you do this for the first time, the list of methods is empty. 4 Right-click the Container Transactions Methods node in the structure pane and choose Add. Or you can click the Add button on the Container Transaction page, select the *(*) entry added, and click the Edit button. A Container Transaction Method page appears: 5 From the drop-down EJB Name list, select a bean that contains the method you are specifying as a container transaction. 138 Developing Applications with Enterprise JavaBeans
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Editing module-wide nodes 6 Double-click *(*) or *.* to display this page: 7 From the drop-down EJB Name list, select a bean that contains the method you are defining a method permission for. 8 In the Interface field, use the drop-down list to select Home, Remote, LocalHome, or Local to indicate which interface you are working with. Your selection in this field determines which methods are available to you in the Name field. 9 In the Name field, use the drop-down list to select the name of the method the selected security roles can call. 10 If there is a method with the same name in the bean as another but with a different method signature, use the drop-down list to select the parameters of the method to identify the correct method. 11 As a final step, enter a description of this method permission. This step is optional. Adding container transactions Enterprise beans that use container-managed transactions must have the transaction policies set by the container. The EJB Module DD editor enables you to set container- managed transaction policies and then associate these policies with methods in the enterprise bean s remote home, local home, remote, and local interfaces. Chapter 13: Editing EJB deployment descriptors 137
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Editing module-wide nodes To add a method permission, 1 Right-click the Method Permissions node in the structure pane and choose Add. 2 If you don t want the container to check these methods to see if the caller has permission to invoke them, select the Unchecked option. 3 In the Role Names box, select the security roles you want to have permission to call the methods. The Role Names list is enabled only if the Unchecked option is not selected. 4 Enter a description of the method permission if you choose. Filling in this field is optional. 5 Expand the Method Permission node in the structure pane to see a Method Permission Methods node. Double-click it, and, on the page that appears, click the Add button: At first, all methods in all beans are selected *(*), meaning that the specified security role has permission to call all the methods in all the beans in the EJB module. 136 Developing Applications with Enterprise JavaBeans
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Editing module-wide nodes Once you ve completed defining the first relationship role for the relationship, double- click the second relationship role node and fill in the second Relationship Role page to complete the second half of the relationship. Adding security roles and method permissions The EJB Module DD editor enables you to create or edit security roles in the deployment descriptor. After you create security roles, you can then associate methods in an enterprise bean s home, remote, local, and local home interfaces with these roles, thereby defining the security view of the application. This section describes how to use the EJB Module DD editor to create the security roles and assign enterprise bean methods to the roles. The section Security Role Reference page on page 128 describes how to use the Roles page to assign user groups and/or user accounts to the roles. Defining security roles in the deployment descriptor is optional. Creating a security role To create a security role in the deployment descriptor, 1 Right-click the Security Roles node in the project pane and choose Add: 2 In the Name field, give the security role a name that identifies the role. For example, you might have a role name such as manager. 3 In the Description field, describe the new role. Filling this field in is optional. 4 If there is a tab with the name of your selected server in the content pane, click it to display a server-specific page. Fill in the fields with information required by your server. Assigning method permissions Once you ve defined one or more security roles, you can specify which methods in the interfaces of an enterprise bean the security role is allowed to invoke. You aren t required to associate a security role with methods in a bean s interfaces. In these cases, none of the security roles defined in the deployment descriptor are allowed to invoke these methods. Chapter 13: Editing EJB deployment descriptors 135
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Editing module-wide nodes Expand the relationship node you just created to see the Relationship Roles node and expand this node to see two relationship role nodes. Each relationship you define is a relationship between two entity beans, so you ll use two Relationship Role pages to define the relationship, one for each bean. Double-click the first the relationship role node to see the first Relationship Role page: Name: Specify a meaningful name for this relationship role. Multiplicity: Relationships can be one to one, one to many, many to one, or many to many. Use the drop-down arrow to select either One or Many to begin describing how this relationship role will relate to the second relationship role you define. For example, your database might keep multiple invoices for each customer. If you were defining the relationship between a Customer bean and an Invoice bean, you would choose One as the Multiplicity value for the customer role and Many as the value for the invoice role. Cascade Delete: Checking the Cascade Delete check box indicates that you want the row(s) of the table to which the second relationship role refers to be deleted when the row referred to in this relationship role is deleted. Description: Use the Description field to explain the place of this relationship role in the relationship. Relationship role source fields EJB Name: Use the drop-down list to select the entity bean in the EJB module that is the first part of the relationship. Description: Provide a description of the entity bean. CMR field Name: Specify the field in this entity bean that links to the second entity bean and therefore establishes the relationship. Type: Use the drop-down list to specify whether the getter method of the CMR field returns a Collection or a Set. Description: Describe how the CMR field you have selected is used in the relationship. 134 Developing Applications with Enterprise JavaBeans
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Editing module-wide nodes Large Icon: The name of a large icon you want associated with the bean. Small Icon: The name of a small icon you want associated with the bean. When you edit a message-driven bean s deployment descriptors, you use pages that are the same as those used by session and entity beans. See these references for information about the individual pages you use for editing message-driven bean deployment descriptors: EJB Reference page on page 124 EJB Local Reference page on page 124 Environment Entry page on page 125 Resource Environment Reference page on page 126 Resource Reference page on page 127 Security Identity page on page 128 Editing module-wide nodes The structure pane displays several nodes that apply to the EJB module as a whole and not to individual beans. Adding nodes of these types or editing existing ones affects the entire EJB module. These are the module-wide node categories: Relationships Security roles Method permissions Container transactions Exclude list You might also see additional server-specific nodes, depending on your selected server for your current project. Editing relationships The Relationships node lets you specify a relationship between entity beans. To begin defining a relationship, right-click the Relationships node in the structure pane and choose Add. A Relationship1 page displays in the EJB Module DD editor and a new node appears in the structure pane: Use this page to give the relationship a name and enter a description of the relationship. Chapter 13: Editing EJB deployment descriptors 133
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Editing message-driven bean deployment descriptors Editing message-driven bean deployment descriptors The following section describes working with the pages that appear for all servers, no matter which server is your target. To see information about server-specific pages, display the page, then press F1. To begin editing the deployment descriptors for a message-driven bean, double-click the bean name in the structure pane. The following page appears: The page includes these fields; fill them in with the pertinent information: Name: . EJB Class: The fully-qualified name of the Java class that implements the bean s business methods. This information must be specified. Transaction Type: Select from the drop-down list whether the bean s transactions are managed by the bean itself or by the container. Acknowledgement Mode: Select the acknowledgement mode from the drop-down list. Your choices are Dups-ok-acknowledge or Auto-acknowledge. The Auto- acknowledge means that all messages the bean receives are acknowledged and a check is performed to prevent acting on duplicate messages. The Dups-okacknowledge option means that all messages are acknowledged, including duplicate messages if they should occur. This field is enabled only if you selected Bean as the transaction type. Message Selector: The message selector that determines which messages the message-driven bean should receive. Here is an example: JMSType = ‘chair’ AND color = ‘black’ AND fabric = ‘leather’ See the JMS specification on Sun Microsystems web site at http://java.sun.com/products/jms/docs.html for more information. Destination Type: Indicates whether a message-driven bean is intended for a Queue or a Topic. Subscription Durability: Indicates whether the bean s subscription to a topic is durable or nondurable. This field is enabled only if you selected Topic as the destination type. All of the Display Information is optional. Display Name: The name you want used to identify the bean for display purposes. Description: A description of the bean. 132 Developing Applications with Enterprise JavaBeans
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Editing session bean descriptors To begin editing the deployment descriptors for a session bean, double-click the bean name in the structure pane. The following page appears: The page includes these fields; fill them in with the pertinent information: Name: The name of the session bean. EJB Class: The fully-qualified name of the Java class that implements the bean s business methods. This information must be specified. Home interface: The name of the home interface of the bean. For an EJB 2.0 component, this field refers to the remote home interface. Remote interface: The name of the remote interface of the bean. Local home interface: The name of the local home interface of the bean. Local interface: The name of the local interface of the bean. Session Type: Select from the drop-down list whether the session bean is a stateless or stateful session bean. Transaction Type: Select from the drop-down list whether the bean s transactions are managed by the bean itself or by the container. All of the Display Information is optional. Display Name: The name you want used to identify the bean for display purposes. Description: A description of the bean. Large Icon: The name of a large icon you want associated with the bean. Small Icon: The name of a small icon you want associated with the bean. When you edit a session bean s deployment descriptors, you use pages that are the same as those used by entity beans. See these references for information about the individual pages you use for editing session bean deployment descriptors: EJB Reference page on page 124 EJB Local Reference page on page 124 Environment Entry page on page 125 Resource Environment Reference page on page 126 Resource Reference page on page 127 Security Identity page on page 128 Security Role Reference page on page 128 Chapter 13: Editing EJB deployment descriptors 131
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