Portal is created using Google Web Toolkit which is java based. Can we publish it in the portal. If yes, how much customization is needed. Can New Widgets can be developed ?
As long as you can deploy a WAR package or add web content/embed html in the portal you should be able to leverage widgets. For more information on widgets and how to configure, I would recommend taking a look at the following:
Also, it is currently not possible to develop new or customize widgets aside from adjusting their parameters.
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