Simple reporting web app for individual purposes

Hello! I need web app for my own individual purposes with reporting functionality. I should be able to: 1. add connection to jdbc datasources, test and save them for future use 2. write SQL or groovy code templates to retrieve recordsets from connections from p.1, save code templates for future use 3. Add input params to code templates from p.2 so user can choose them in runtime: date, checkbox, listbox, multiline listbox/combobox 4. Combine templates so output recordset from one template can be used as input for another template and so on 5. View results (recordsets) in default. table view 6. Export table view to excel and PDF 7. Be able to code custom view templates in HTML + groovy code templates, save templates for future use Tech reqs: Programming language: grails / groovy, JavaScript, Html5, jquery This tiny project can grow to middle or maybe very big project in future, so I'm also looking for partners! Best regards! Ask questions please!