To display content, Placeholders refer to a document's MIME type and then
generate the HTML tags that a browser requires for the specific document type.
For example, to display an image-type document, an ad placeholder must generate
the <img> tag that a browser requires for images. By default, ad placeholders
can generate the appropriate HTML only for the following MIME types:
If you are familiar with basic Java programming, you can write classes that
enable placeholders to generate HTML for additional MIME types. To support
additional MIME types, you must complete the following tasks:
Create and Compile a Java Class to Generate HTML
Register the New Class
Create and Compile a Java Class to Generate HTML
To generate the HTML that the browser requires to display the MIME type,
use WebLogic Workshop to create a Java Project in your application, then create
and compile a Java class in that Java Project that implements the com.bea.p13n.ad.AdContentProvider
interface. For information on this interface, see the WebLogic
Portal Javadoc.
Register the New Class
After you save the class in a directory that is in your classpath, you must
notify WebLogic Portal of its existence:
-
Stop the server.
-
Create a backup copy of your application's META-INF\application-config.xml
file.
-
Open application-config.xml in a text editor and find the <AdService>
element.
-
Add the following as a subelement of <AdService>:
<AdContentProvider
Name="MIME-type"
Provider="YourClass.class"
Properties="optional-properties-for-your-class"
>
</AdContentProvider>
Provide the following values for the attributes of the AdContentProvider
element:
Name - The name of the MIME type that you want to support.
Provider - The name of the compiled Java file. If you
saved the file below a directory that your CLASSPATH environment variable
names, you must include the file's pathname, starting one directory level
below the directory in classpath.
Properties - Any additional properties or parameters
want to pass to your object. For example, if you added <PORTAL_APP>/classes
to the system classpath, save your class to support AVI files as <PORTAL_APP>/classes/myclasses/MimeAvi.class.
For example:
<AdContentProvider
Name="video/x-msvideo"
Provider="myclasses.MimeAvi"
Properties=""
>
</AdContentProvider>
-
Save your modifications to application-config.xml.
- Restart the server.
- Activate the content provider in the WebLogic Administration Portal Service
Administration tools.
- Launch the WebLogic Administration Portal by entering the following
URL in a browser: http://<server>:<port>/<portal_app>Admin.
For example, http://localhost:7001/myPortalAppAdmin. Log in with a portal
or system administrator username and password. The default login is weblogic/weblogic.
- In the WebLogic Administration Portal, click Service Administration.
- In the left resource tree, click Add/remove configurable item.
- In the list of configurable items that appears, select the checkbox
next to the content provider you added.
- Click Update at the bottom of the window.