Page Comparison

Introduction:

This wiki page explains the design and implementation of how to log telemetry event to track the stage load time.

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• IMPRESSION event before the stage is loaded

{"eid":"IMPRESSION","ets":1549431460158,"ver":"3.0","mid":"IMPRESSION:0f1f82aefd1d1e0fd6c4c0a7ce0efe58","actor":{"id":"9942b170-1fd4-4161-964c-3d70b699f1e9","type":"User"},"context":{"channel":"505c7c48ac6dc1edc9b08f21db5a571d","pdata":{"id":"staging.diksha.app","ver":"2.0.localstaging-debug","pid":"sunbird.app.contentplayer"},"env":"contentplayer","sid":"c89f3277-b20f-410c-8bb6-6b050458a1f0","did":"ceeae2aa2bec16943fe4229564ed1caedf2880f9","cdata":[{"id":"offline","type":"PlayerLaunch"},{"id":"2541eef75f1ad15f1a9d0e6f0edea666","type":"ContentSession"}],"rollup":{"l1":"do_2126647710500290561553"}},"object":{"id":"do_2126647710500290561553","type":"Content","ver":"1.0"},"tags":[],"edata":{"type":"workflow","pageid":"d373ccbc-955d-4b46-bda1-5ad52d54ca3e","uri":""}}

Problem Statement:

Currently, we are not logging the telemetry event after the stage load. Because of this, we are not able to track the stage load time. 

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• Before: We are already logging the INTERACT event before the stage is loaded, we can log telemetry event along with this event.
• After: In PreloadJS we have "complete" event  - this event will fire when a queue completes loading all files

queue.on("complete", function() {
        // Log following telemetry event
}, null, !0),

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Event Data for before and after stage load

{

"edata": {

          "type": "system/app",

          "level": "INFO",

          "message": "Stage load completed",

          "pageid": "stage_id",

          "params": [

                        {

                             "startProgress": "60%", // Preload of stage completed by 60% before clicking on next.

                             "endProgress": "100%" // Stage 100% loaded after clicking on next.

                       }, { "key", "value"}               // All the plugins or assets lodaded from 60% to 100%.

           ]

}

}

Conclusion: 

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• Log IMPRESSION event on completion of stage load
• Add one more property in IMPRESSION 

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• event as a duration

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• .