optimizely / javascript-sdk / 2015

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feat: Added Offline storage support to Event processor for React Native Apps (#517)

Summary:

Added Offline storage support to Event Processor for React Native Apps.

Stores events when device is offline and then redispatches when the device is online again, new event is ready to be dispatched or SDK is re-initialized.
Adds a new eventMaxQueueSize config option which represents number of offline events SDK will store at a time. Deault is 10k for now.
Adds a connectivity listener to redispatch events when device is back online.
Follow-up changes expected in optimizely-sdk package.

Add a new option to EventProcessor constructor to represent maxQueueSize in React Native entry point.
Change callback parameter to http status in DefaultEventDispacher for browser entry point which is also used for React Native entry point.
Add AsyncStorage module configuration for umd bundles in rollup config.

Test plan:

Wrote new unit tests
Tested offline with FSC suite to make sure it does not break existing event processor functionality.
Tested sequence of redispatching events using a local mock server and timestamps.

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