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9.3.5 Updating the portlet descriptor (portlet.xml)
In this section, you will update the portlet descriptor (portlet.xml) to do the following:
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| Add three primary colors as preferences
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| You will also add the .greeting preference
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Execute the following steps:
| 1.
| Open the portlet.xml by double-clicking the Portlet Deployment Descriptor in your project.
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| 2.
| Select the Portlets tab and then select MySimplePortlet as seen in Figure 9-23.
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Figure 9-23 Portlet.xml
| 3.
| Scroll down until you see the Persistent Preference Store box as shown in Figure 9-24.
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| 4.
| Clear all preferences as follows:
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a.
Select all the preferences by holding down Ctrl and selecting each preference.
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Figure 9-24 Persistent Preference Store
| 5.
| You will now add the preferences for the .greeting, red, yellow, and blue. For the .greeting, you will mark it as read-only.
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Read only means that only an administrator in Configuration mode will be able to update this preference during runtime.
Execute the following steps:
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a.
Select Add to open the New Preference window.
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b.
Enter .greeting for the name.
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c.
Select Add to enter a value of Hello.
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d.
For the .greeting preference only: check the box for read-only.
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f.
Repeat steps a through e for the three colors (red, yellow, and blue). Use lower case for the color names and values. Do not select the read-only option for these preferences.
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Figure 9-25 New Preference window
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g.
Save and close the portlet.xml by using Ctrl-s or File | Save.
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Note: There should not be any errors in any of the files.
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| 6.
| Examine the portlet descriptor (portlet.xml) source and review the preferences you just entered.
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