Build and Test a Service Interface Function Block Type

Start the FBEditor. Create a new service interface FB type in the editor by: Opening a file containing an existing service interface function block type such as the CLIENT.fbt and SUBSCRIBE.fbt files in the src\net folder, or Clicking the New=>FB Type=>ServiceInterface menu item as shown at right. Edit the function block's elements: Edit the FB type's properties. Be sure to enter package fb.rt.<mypkg>; in the Compiler Info header field, where <mypkg> is the name of the src subdirectory you are working in, for example, student or book. Edit the FB type's interface. Edit the service sequences. When your editing is complete, save your work with the Save As... button. It is a good idea to save your work from time to time while editing, too! Generate and compile a Java® source file with the Save As... button. Compiled code will run but do nothing useful. Use a text editor to fill in the skeleton service_XXX(...) methods in the generated java file, including any additional instance variables, supporting methods, etc., as required. Don't forget to set the QO.value field as appropriate and invoke the serviceEvent(this) method on the appropriate event output, e.g., INITO.serviceEvent(this) when leaving the service_INIT(...) method. Generate a JavaTM class file with an appropriate compiler . Test the FB type by clicking the Run button. In the test window, you can set or clear the values of the inputs, click on event input buttons and observe the resulting event and variable outputs. If you change the code of the block and recompile, you will have to exit the FBEditor application and restart it in order to force a reload of the class file.