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Removing beans To remove a view, 1 Make the view you want to remove the current view. 2 Right-click the EJB designer pane. 3 Choose Views|Delete View or click the Views button on the toolbar and choose Delete View. The view disappears. If the deleted view had beans on it, the beans will reappear on the default view. Finding beans If you have several views in an EJB module, it s possible to lose track of the location of a bean. To quickly find a particular bean, 1 Choose Search|Find EJB or Ctrl+F. A Find EJB dialog box appears. All the EJBs in the module are listed with the view they are in parentheses. 2 Select the EJB you are looking for from the EJB Names list or type the EJB name in the EJB Name field at the top of the dialog box. You may enter wildcard characters (* and ?) in the EJB name. 3 Click OK. The view that contains the EJB you are searching for becomes the current view, the specific EJB appears, and its inspector opens. Arranging beans You can choose to have the EJB designer rearrange your enterprise beans for you on a view: 1 Right-click the EJB designer pane. 2 Choose Views|Arrange EJBs or click the Views button on the toolbar and choose Arrange EJBs. The EJB designer attempts to rearrange the beans in a logical pattern. Removing beans To remove one or more EJBs from the EJB designer and to delete the corresponding source files in the project pane, 1 Select the bean representation in the EJB designer: To select a single bean, click it. To select multiple beans, Ctrl-click each bean you want to select or drag the mouse pointer around those you want to select. 2 Right-click one of the selected beans and choose Delete Selected EJBs, press the Delete key, or choose Delete Selected EJBs on the EJB designer toolbar. A dialog box appears explaining that the deletion will be permanent and asking you to confirm the deletion. By default, the Delete Source Files From Project check box is checked in the dialog box. If you just want to delete the bean deployment descriptors and leave the source files untouched, uncheck this option. You might find unchecking this option useful if you are sharing source code between modules or if you are simply removing beans for which the source code no longer exists. 32 Developing Applications with Enterprise JavaBeans
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Organizing beans with views When you create a new EJB module, the default view appears in the EJB designer. You can rename the default view or create a new view, if you choose. To rename the default view, 1 Right-click the EJB designer pane and choose Views|Rename View or click the View button on the toolbar and choose Rename View. 2 Type in the new name you want to use for the view in the dialog box that appears and click OK or press Enter. The new name for the view appears on the view tab at the bottom of the EJB designer pane. To create a new view, 1 Right-click the EJB designer pane and choose Views|New View or click the Views button on the toolbar and choose New View. 2 Type in the name you want to use for the new view in the dialog box that appears and click OK or press Enter. A new tab appears with the name you specified near the bottom of the EJB designer pane. To make the new view you added the current view, click its tab. To move one or more EJBs to another view, 1 Select one or more EJBs on a view. (Click an EJB to select it. To select multiple EJBs, Ctrl+Click each EJB or click on the EJB designer and drag over each EJB you want.) 2 Right-click one of the selected EJBs. 3 Choose Views|Move Selection or click the Views button on the toolbar and choose Move Selection. 4 Select the view you want to move the bean(s) to from the drop-down list. To copy one or more EJBs to another view, 1 Select one or more EJBs on a view. (Click an EJB to select it. To select multiple EJBs, Ctrl+Click each EJB or click on the EJB designer and drag over each EJB you want.) 2 Right-click one of the selected EJBs. 3 Choose Views|Copy Selection or click the Views button on the toolbar and choose Copy Selection. 4 Select the view you want to move the bean(s) to from the drop-down list. To remove one or more EJBs from a view, 1 Select one or more EJBs on a view. 2 Right-click one of the selected EJBs. 3 Choose Views|Remove Selection. When you use the Views|Remove Selection command, the EJB representations are removed from the current view; they aren t permanently removed from the EJB module or project. If the EJBs you selected to remove don t exist on any other view, they will reappear on the default view after you have removed them. If you want to delete one or more EJBs and the corresponding source code altogether, see Removing beans on page 32. Chapter 4: Working with the EJB designer 31
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Importing beans Importing beans You can import an enterprise bean into an EJB module using the EJB designer. You ll find this useful if you want to import a bean from one EJB module to another or if you ve obtained a bean that has no accompanying deployment descriptors. The source code of the bean you are importing must be in the project s source or class path. To import an enterprise bean, 1 Open the EJB module you want to import the bean into in the EJB designer. 2 Right-click the EJB designer pane and choose Import EJB or click the Import EJB button on the toolbar. The Import EJB dialog box appears: 3 Type the name you want for the bean in the Bean Name field. 4 Select the type of bean you are importing from the Bean Type drop-down list. Your choices are CMP 2.0, CMP 1.1, BMP, Session, or Message-Driven. 5 Specify the bean class name and location in the Bean Class field. You can use the ellipsis ( ) button to locate the bean and the package information will be filled in automatically. 6 Use the interface class fields to specify the interfaces you want to import and their location. You can use the ellipsis ( ) button to locate the interfaces and the package information is filled in for you automatically. 7 If you want to import a primary key class for an entity bean, specify the primary key class and its location in the Primary Key Class field. 8 Click OK. The new bean is imported into the EJB module. Its bean representation appears in the EJB designer along with its inspector, ready for you to edit bean properties. Organizing beans with views The EJB designer allows you to group sets of enterprise beans on views, which help you organize and develop complex EJB projects. Each view acts much like a worksheet in a spreadsheet or a page in a multi-page dialog box. While your EJB module can contain many enterprise beans, only the ones on the current view are visible at any one time in the EJB designer. Therefore, using views removes clutter on the screen and allows you to focus on the beans you are interested in at any one moment. 30 Developing Applications with Enterprise JavaBeans
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Modifying the bean Removing a method To remove a method from a bean, right-click the method in the bean representation and choose Delete Method. Regenerating a bean s interfaces When you work directly in the bean s source code, you might make changes to the bean class, but forget to make those changes in the home/local home and remote/local interfaces. You can choose to have the EJB designer regenerate those interfaces for you based on the current state of your bean class. To regenerate the interfaces of your bean, 1 Right-click the top of the bean representation in the EJB designer. 2 Choose Regenerate Interfaces from the context menu that appears. If you prefer to have the EJB designer regenerate the bean s interfaces automatically each time you make changes to the source code of the bean class, follow these steps: 1 Choose Tools|Preferences|EJB Designer. 2 Check the Always Regenerate Interfaces check box. 3 Click OK to close the dialog box. Setting package names for an enterprise bean You can quickly change packages for all the classes and interfaces of an enterprise bean all at once. This is especially useful if, for example, you want to move all the classes and interfaces of a bean to another package. Follow these steps: 1 Right-click the bean in the EJB designer and choose Set Packages For Selection. This dialog box appears: 2 Use the dialog box to change the package names for the enterprise bean parts. If you want all the parts of the bean to be in the same package, simply specify the name of the package you want as the Bean Package Name and the value of all the remaining fields will change to the name of that package. If you want the parts of the bean to be in different packages, you can edit each field individually. If a package exists in your current project, you can select it as a field s value by using the drop- down arrow to display a list of existing packages. You can also use the ellipsis ( ) button to display a Select A Package dialog box to select an existing package. If the package doesn t exist yet, type a new package name in a field, and when you choose OK, you will see the new package created in the project pane that contains the classes and/or interfaces you specified for that package. 3 Choose OK. You can see the results of changing the package for the bean classes and interfaces in the project pane. Chapter 4: Working with the EJB designer 29
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Modifying the bean 2 Use the inspector to modify the attributes of untitledField, including the name of the field. 3 To complete your field, double-click the bean class in the project pane to display the source code. Find where the field s getter and setter methods are defined and add any additional logic you might want. If you make a mistake and want to remove a field, right-click the field in the bean representation and choose Delete Field. Adding a new method To add a new method to a bean, 1 Right-click the bean representation in the EJB designer and choose Add|Method or click the Add button on the toolbar and choose Method: A new method titled untitledMethod appears in the bean. The method s inspector appears: 2 Use the inspector to modify the attributes of untitledMethod. 3 To complete your method, double-click the bean class in the project pane to display its source code. Find the skeleton method you just added in the source and, in the method s body, write the logic of the method. 28 Developing Applications with Enterprise JavaBeans
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Modifying the bean To return to the EJB designer, double-click the EJB module node in the project pane. Or you can click the EJB module tab in the content pane. Modifying the bean So far, JBuilder has generated just skeleton classes for the bean you are developing. Continue working within the EJB designer to make the bean what you want. You can add new fields and methods and modify their attributes. At any time you can switch directly to the source code for the bean and add new code and modify existing code. All your changes will be represented in the EJB designer when you switch back to it. Editing bean attributes Edit bean attributes by clicking the element of the bean you want to modify. When you do, an inspector appears that you can use to make your changes. Adding a new field To add a new field to a bean, 1 Right-click the bean representation in the EJB designer and choose Add|Field or click the Add button on the toolbar and choose Field: A new field titled untitledField appears in the bean. The field s inspector appears: Chapter 4: Working with the EJB designer 27
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How the EJB designer names EJB files You will see the files the EJB designer has generated for this bean. 4 Within the inspector, change the name of the bean to a name of your choosing. The files in the project pane are renamed to reflect the name change. How the EJB designer names EJB files The names of the files JBuilder generates when you use the EJB designer to create enterprise beans varies depending on the type of enterprise bean you are creating. In JBuilder, EJB 2.0 session beans are remote by default and EJB 2.0 entity beans are local by default. Therefore, the EJB designer generates a remote home interface for a 2.0 session bean and a local home interface for a 2.0 entity bean. In each case the name of the home interface, whether remote for a session bean or local for an entity bean, will be Home. Likewise, the interface that declares the business methods is the remote interface for a session bean and the local interface for an entity bean. For example, if you decide to generate both the local and remote interfaces for an EJB 2.0 session bean named Component, these are the files the EJB designer generates for you: ComponentHome the remote home interface ComponentBean the bean class Component the remote interface ComponentLocalHome the local home interface ComponentLocal the local interface If you do the same thing for an EJB 2.0 entity bean with the same name of Component, these are the files the EJB designer generates for you: ComponentHome the local home interface ComponentBean the bean class Component the local interface ComponentRemoteHome the remote home interface ComponentRemote the remote interface For an EJB 1.1 session or entity bean with the same name of Component, these are the files the EJB designer generates for you: ComponentHome the remote home interface ComponentBean the bean class Component the remote interface Viewing a bean s source code At any time as you work within the EJB designer, you can double-click a generated file (.java) in the project pane to see its source code. Or you can right-click the bean representation in the EJB designer and choose View Bean Source in the context menu Chapter 4: Working with the EJB designer 25
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Creating enterprise beans with the EJB designer Creating enterprise beans with the EJB designer To begin creating an enterprise bean, 1 Right-click the EJB designer pane and choose Create EJB to display this menu: 2 From the menu, choose the type of enterprise bean you want to create: CMP 2.0 Entity Bean, CMP 1.1 Entity Bean, BMP Entity Bean, Session Bean, or Message- Driven Bean. A representation of the bean appears in the EJB designer named Enterprise (where stands for a number). An inspector for this bean also appears. In the following image you see a session bean representation and the session bean s inspector: 3 Open the package node that appears in the project pane that has the same name as the project: 24 Developing Applications with Enterprise JavaBeans
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Displaying the EJB designer c Click OK. The EJB designer appears. For example, if you are starting a project named EJB2_Project and you specified MyEJBModule as the name of the EJB module, the EJB designer, the project pane, and the structure pane would look like this: Any time another view, such as the EJB DD editor, is present, you can switch to the EJB designer view by using one of these two methods: Double-click the EJB module s node in the project pane and click the EJB Designer tab in the content pane. Click the EJB module s tab at the top of the content pane. This option is available only if the module is open in the current project. Quickening the display of your EJBs If you have many EJBs in the EJB designer, you might want to collapse the bean representations so that you can see only the names, making it easier to locate the bean you want and quickening the display of the beans. Choose Tools|Preferences| EJB Designer and check the Only Expand Selected EJBs option. The EJB designer displays the beans with their names only. To see the fields, methods, and so on of the bean, you then click it to select it in the EJB designer. To see the all of the beans in their entirety again, uncheck the Only Expand Selected EJBs option. When you do, the Lazily Load EJBs option is enabled. If you do select the Only Expand Selected EJBs option, you can then choose to have the EJB designer load your beans into memory only as they are selected and expanded. Check the Lazily Load EJBs option, which can speed up the EJB designer s initial display. Preventing the saving of EJB designer layout changes If, as you work with the EJB designer, you find you are inadvertently moving beans around when you don t intend to, you can prevent JBuilder from saving the layout changes you make in the EJB designer. Choose Tools|Preferences|EJB Designer and uncheck the Dirty Module On Layout Changes option, which is on by default. When this option is on, all changes to the layout of the beans in the EJB designer are automatically saved. When this option is off, layout changes are stored only if you make changes in your code. Caution If you uncheck the Dirty Module On Layout Changes option, none of your layout changes are saved. Chapter 4: Working with the EJB designer 23
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Displaying the EJB designer using the Project For Existing code wizard, which creates a new JBuilder project containing one or more new EJB modules that contain the deployment descriptors. The Project For Existing Code wizard creates a new JBuilder project from an existing body of work. That body of work can include EJB 1.1 or 2.0 vendor-specific deployment descriptors. To use the Project For Existing Code wizard to create a new JBuilder project and a new EJB module for each directory containing EJB deployment descriptors the wizard scans, follow these steps: 1 Choose File|New to display the object gallery. 2 Click Project in the tree to display the Project page. 3 Double-click the Project For Existing Code icon to start the Project For Existing Code wizard. 4 Use the ellipsis ( ) button to specify the root directory where you want the scan to begin. For example, suppose you have a clients directory that contains two subdirectories named personal_info and accounts, each containing EJBs with deployment descriptors. You want to create both a personal_info and an accounts EJB module. If you specify clients in the Directory field, the wizard starts its scan with the clients directory, then scans the personal_info and accounts directories. Each generated EJB module is given a default name generated from the subdirectory name where the descriptors were found. So the new project the wizard creates will contain two EJB modules, personal_info and accounts. For complete information about using remaining pages of the Project From Existing Code wizard, click the wizard s Help button or see Creating a project from existing files in the Creating and managing projects chapter in Building Applications with JBuilder. Displaying the EJB designer You use the EJB designer to develop enterprise beans. There are two ways to display the EJB designer to begin creating an enterprise bean: Use the EJB Module wizard to create a new module. The wizard displays the new module it creates in the project pane. Double-click the new module to display the EJB designer. See Creating an EJB module with the EJB Module wizard on page 18 for more information. Use the EJB designer wizard. These are the steps you follow: a Choose File|New|Enterprise|EJB to display the EJB page of the object gallery and double-click the EJB designer. b Select the target EJB module for the bean you create from the list of Available EJB Modules. The available EJB modules appear in the list. If you don t have a module yet, you can choose the New button, which starts the EJB Module wizard. When the wizard completes, the EJB designer wizard continues. 22 Developing Applications with Enterprise JavaBeans
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