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REMOTE CONFIG pro tips Ubiratan Soares August / 2017

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PRO TIPS

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Attention to tool limits and policies 1

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Do not forget to provide the default values 2

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// At application setup level FirebaseRemoteConfig .getInstance() .setDefaults(R.xml.remote_config_defaults); ➜ ~/path/to/app/main tree res res !"" xml !"" remote_config_defaults.xml

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Beware of backward compatibility for configs 3

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Assign values by build type per config 4

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Choose the proper activate / fetch strategy for configs 5

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Default Expires = 12h activateFetched() Async Fetching RemoteConfig SDK ACTUAL VALUES getXYZ() CACHED VALUES fetch(timeToCache)

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Are the upated values for configs needed right now ?

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Load values for the next time usage, at application lifecycle level. For non-critical configs

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If you cannot wait for the next interaction with your app … Can user wait for the actual values for configs at current app section ?

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Waiting for refresh Fetch and activate using callback and provide the proper visual feedback (usually a blocking, loading screen)

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If actual config values are critical for feature …

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Fetch and activate using callback before user interaction with remote- controled feature No delays accepted

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Find a way to override config`s local caching when needed 6

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Default Expires = 12h activateFetched() Async Fetching RemoteConfig SDK ACTUAL VALUES getXYZ() CACHED VALUES fetch(timeToCache)

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Monitor application foreground / background dance and re-fetch with cache invalidation at transition

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Force a fetch with cache purging + activate using a push notification

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FINAL REMARKS • RemoteConfig is a great tool for feature-flagging • Deadly simple to integrate with provided SDKs • Beware of basics (default values, limitations, config compatibilities, etc) • Choose the proper fetch+activate strategy for each config

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UBIRATAN SOARES Computer Scientist by ICMC/USP Software Engineer, curious guy Google Developer Expert for Android Teacher, speaker, etc, etc

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THANK YOU @ubiratanfsoares ubiratansoares.github.io https://br.linkedin.com/in/ubiratanfsoares