Java plug-in Extension Point

I am creating a programming language in xtext and I want:

1. I need to know which extension point I have to choose to create my own Run-As handler in the plug-in development. to create my handler of running the program by contributing to the Run As extension.

2. How to attach a command when the user right-click a table in the Data Source Explorer. I want to 开发者_开发知识库use the table tree node to generate some code.

But i do not know which extension points provide these functionality in Eclipse.

Thank You, Abu

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1- org.eclipse.debug.ui.launchGroups

2- Not sure this is possible. Where does the data source explorer view comes from ? I am not aware of this view as stantard eclipse view. May be you can check with the plugins provider of this view