Content In realtime To 1000s of tablet concurrently Broadcast - sometimes To a subset of tablet - sometimes Offline Platform - Support multiple apps · · · · · · ·
to server Poll for its content At regular intervals With android services The server returns only the deltas · · · · · Simplest Solution Possible Offline tablets gets the data back when online · · Createing contents Offline (Read Only) Server scalling Battery life · · ·
- xmpp client for android Messages which are time critical Class attendance OK if offline tablets misses them · · · · · · 0 server side code Good for chat like interactions · · Persistent messages Scaling - cocurrent connections Reliability · · ·
sequence Can be applied in the same order to get the current state Like a Version Control System All parties in the system just speaks events · · · · ·
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