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1. Right-click on the project and select Build Path > Configure Build Path and  from the menu. Then select the Libraries tab.
   
   
   
   
2. Click the Add JARs button and type "i4" into the search bar. From the results, select i4-core.jar and i4-mi.jar from your plugin project. 
   
   
   
   
3. Click OK to save this and OK again in the build path config window.
4. Under the WEB-INF/src folder, create a new folder and call it META-INF. Create a new folder called services within this one.
   
   Image AddedCreate the following folder structure under src: META-INF/services. 
   
   

5. Depending on which plugin is being developed, create a file with the fully qualified name of the plugin interface in the services directory. See the table below for all available plugin options:
   
   

   Yellowin Plugin	Interface	Description
   Transformation Step	com.hof.mi.etl.step.ETLStep	A step which may be used in the Data Transformation module.
   Advanced Function	com.hof.mi.interfaces.AnalyticalFunction	Advanced functions used in Reports.
   Data Type Converter	com.hof.mi.interfaces.Converter	Conversion of data types, done at the View Level and in the Data Transformation module.
   Custom Formatter	com.hof.mi.interfaces.CustomFormatter	Custom formatting used in Reports.
   Data Profiler	com.hof.mi.interfaces.DataSuggestionPlugin	Profile data for a field. Contains functionality to determine whether the implemented suggestion is applicable.
   Icon Set	com.hof.mi.interfaces.IconSet	Defines an icon set for use with Report Alerts.
   Third-Party Connector	com.hof.mi.thirdparty.interfaces.AbstractDataSource	Connectors to create connections to external API data sources.
   Canvas Widget	com.hof.mi.widgetcanvas.interfaces.CanvasObjectTemplate	Custom widgets used in canvases in the Dashboard, Storyboard and Report Design modules.
   Source Platform	com.hof.sources.SourcePlatform	Define source types, such as JDBC, JNDI, OLAP etc.

   
   

   1. For instance, if creating a Data Transformation Step, name your file 'com.hof.mi.etl.step.ETLStep'.
      
      
      
      
      
6. Create the plugin class by implementing one of the interfaces given above. The fully qualified classname should be added to the services file corresponding to the interface.
   So, for our Data Transformation Step example, add its fully qualified classname to META-INF/services/com.hof.etl.step.ETLStep.
   
   
   If necessary, another transformation step may be added You can add further transformation steps below this line, if required.

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The next step is to set up your Tomcat configurationsconfiguration. 

1. Select Window  > Preferences and go to the section for Tomcat.
   
   
   
   
2. Set Tomcat home to <Yellowfin Install directory>/appserver and Contexts directory to <Yellowfin Install directory>/appserver/conf/Catalina/localhost.
   
3. Expand the Tomcat section in the left-side menu and click on Advanced. Add the plugin project to Tomcat's classpath.
   
   
   
   
4. Adjust JVM Settings, if necessary (through the JVM Settings option on the left side. Tip: You  You could use this to increase the memory available for Tomcat.
5. Select Source Path (in the left side menu) and add the plugin project.
   
   
   
   
6. Click OK to save.
7. Start up Tomcat from Eclipse using the buttons in the toolbar.
   
   
   
   
8. The plugin will be now be available in Yellowfin.
   
   

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