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Web Solutions for PVSS: Easy Integration, Better Scaling, Open Protocols

ETM offers two solutions: Web Client & Pocket Client. Web Client is a browser plugin providing easy installation, proxy forwarding, auto project updates. Pocket Client converts panels to HTML/JavaScript without plugins, but limited support & look may vary.

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Web Solutions for PVSS: Easy Integration, Better Scaling, Open Protocols

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  1. PVSS Web ClientPVSS Pocket Client Daniel.Rodrigues@cern.ch

  2. Web Solutions for PVSS • Customers were asking for solutions integrating Web and PVSS • Integration with modern browsers • Easy to use on different platforms • Better Scaling • Use of Open Protocols • Because so… • ETM is developing two different solutions • Web Client • Pocket Client • Available on PVSS 3.9, currently being tested at CERN Openlab PVSS Web, FWWG, November 2010

  3. Web Client • Web Client • Is a Plugin, to be installed at the end browser • Supports all CERN platforms (Lin/Win, IE/Firefox) • PROS • - Easy to install • Project files downloaded on the fly (including EWO’s and CtrlExtensions) • Behaves like any Remote UI (no new development required) • Proxy forwarding implemented • CONS • - Install admin rights • Upper limits in Performance • Some limitations (no RDBQueryDirect, ActiveX, extensions dependencies) • Authentication limited • Cache conflicts PVSS Web, FWWG, November 2010

  4. Web Client • Interesting features: • cacheTimeoutSecs : if a new file is necessary, checks if it already exists, otherwise downloads from the server  [Automatic Project Update] • the only HTTP traffic is for connection and file download. PVSS messages use a spawn process (PVSStoolTunnel) • the para module can be open from the web client PVSS Web, FWWG, November 2010

  5. Web Client • Comment on cons: • RDBQueryDirect. • wherever the browser would open, oracle client would be necessary. • even though, requests are honoured, albeit eventual reducing performance. • Ewo’s and Ctrl Extensions using external libraries might not be available on client • Will use the available dynamic loader! • Performance was greatly improved from the extensive testing done last year • First smoke tests, up to ~600 Hz on dpConnect changes in 5 simultaneous clients for 1kHz on the server. • Firewall issues might remain. Proxying works on my test machines, but CERN setup could prove yet a challenge • Let’s see it working? Please point your laptops to http://pcen33050.cern.ch PVSS Web, FWWG, November 2010

  6. Pocket Client • Pocket Client • Converts panels into HTML and Java Script • Pros • No need to install a plugin • Any web browser supporting Javascript should support the Pocket Client • It is a “real” Web Solution. • Cons • Right now, only works with the panel topology • Only Standard Object Library objects are convertible right away • No Ctrl code is converted (need to implement in html and Javascript for each panel) • Browser must support SVG or VML • Look and feel might change from browser to browser • No dollar parameters • No redundancy • Only last values are sent to clients, meaning all values in below a blocking time PVSS Web, FWWG, November 2010

  7. Pocket Client PVSS Web, FWWG, November 2010

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