Deploying a prefetch plug-in

To identify your plug-in class to the crawler, put the class in a JAR file and enter the name of the plug-in class and the location of the JAR file in the crawler window in the administration console. You must enter the fully qualified name of the plug-in class, and the absolute path name of the JAR file.

To deploy a prefetch plug-in:

1. Compile the JAVA file and create a JAR file for it. The JAR can also contain supporting classes and resources, so you might name it ofplugins.jar.
   Requirment: Use the Java JAR utility that is included in the Java Development Kit (JDK).
2. Copy this JAR file to the computer that runs the web crawler. Enter the absolute path for the JAR file in the administration console on the crawler window when you enable plug-in.
3. In the administration console, specify the following items:
   • The fully qualified class name of the implemented Java™ class, for example, com.mycompany.ofpi.MyPrefetchPlugin
   • The qualified class path for the JAR file

   Ensure that the information that you enter is correct. The system does not check that the JAR file exists.

   When the crawler is started and finds a plug-in JAR file and class name, the crawler loads the JAR and instantiates the class by using the no-argument constructor. The crawler then initializes the instance by calling the init method. If that method returns true, the plug-in is added to the list of prefetch plug-ins.