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73 lines
3.2 KiB
Kotlin
73 lines
3.2 KiB
Kotlin
3 years ago
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.experiments
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import android.content.Context
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import android.net.Uri
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import android.os.StrictMode
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import io.sentry.Sentry
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import mozilla.components.service.nimbus.NimbusApi
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import mozilla.components.service.nimbus.Nimbus
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import mozilla.components.service.nimbus.NimbusDisabled
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import mozilla.components.service.nimbus.NimbusServerSettings
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import mozilla.components.support.base.log.logger.Logger
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import org.mozilla.fenix.components.isSentryEnabled
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import org.mozilla.fenix.ext.components
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import org.mozilla.fenix.ext.settings
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@Suppress("TooGenericExceptionCaught")
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fun createNimbus(context: Context, url: String?): NimbusApi =
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try {
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// Eventually we'll want to use `NimbusDisabled` when we have no NIMBUS_ENDPOINT.
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// but we keep this here to not mix feature flags and how we configure Nimbus.
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val serverSettings = if (!url.isNullOrBlank()) {
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NimbusServerSettings(url = Uri.parse(url))
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} else {
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null
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}
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// Global opt out state is stored in Nimbus, and shouldn't be toggled to `true`
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// from the app unless the user does so from a UI control.
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// However, the user may have opt-ed out of mako experiments already, so
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// we should respect that setting here.
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val enabled =
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context.components.strictMode.resetAfter(StrictMode.allowThreadDiskReads()) {
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context.settings().isExperimentationEnabled
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}
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Nimbus(context, serverSettings).apply {
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// This performs the minimal amount of work required to load branch and enrolment data
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// into memory. If `getExperimentBranch` is called from another thread between here
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// and the next nimbus disk write (setting `globalUserParticipation` or
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// `applyPendingExperiments()`) then this has you covered.
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// This call does its work on the db thread.
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initialize()
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if (!enabled) {
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// This opts out of nimbus experiments. It involves writing to disk, so does its
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// work on the db thread.
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globalUserParticipation = enabled
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}
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// We may have downloaded experiments on a previous run, so let's start using them
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// now. We didn't do this earlier, so as to make getExperimentBranch and friends returns
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// the same thing throughout the session. This call does its work on the db thread.
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applyPendingExperiments()
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// Now fetch the experiments from the server. These will be available for feature
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// configuration on the next run of the app. This call launches on the fetch thread.
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fetchExperiments()
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}
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} catch (e: Throwable) {
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// Something went wrong. We'd like not to, but stability of the app is more important than
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// failing fast here.
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if (isSentryEnabled()) {
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Sentry.capture(e)
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} else {
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Logger.error("Failed to initialize Nimbus", e)
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}
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NimbusDisabled()
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}
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