Developer mode: Fail-fast (#745)

CHANGES.md

@@ -8,7 +8,7 @@ Improvements 🙌:
  - The initial sync is now handled by a foreground service
  - Render aliases and canonical alias change in the timeline
  - Fix autocompletion issues and add support for rooms and groups
- - Introduce developer mode in the settings (#796)
+ - Introduce developer mode in the settings (#745, #796)
  - Improve devices list screen
  - Add settings for rageshake sensibility
  - Fix autocompletion issues and add support for rooms, groups, and emoji (#780)

vector/src/main/java/im/vector/riotx/VectorApplication.kt

@@ -42,7 +42,7 @@ import im.vector.riotx.core.di.DaggerVectorComponent
 import im.vector.riotx.core.di.HasVectorInjector
 import im.vector.riotx.core.di.VectorComponent
 import im.vector.riotx.core.extensions.configureAndStart
-import im.vector.riotx.core.rx.setupRxPlugin
+import im.vector.riotx.core.rx.RxConfig
 import im.vector.riotx.features.configuration.VectorConfiguration
 import im.vector.riotx.features.lifecycle.VectorActivityLifecycleCallbacks
 import im.vector.riotx.features.notifications.NotificationDrawerManager
@@ -75,6 +75,7 @@ class VectorApplication : Application(), HasVectorInjector, MatrixConfiguration.
     @Inject lateinit var versionProvider: VersionProvider
     @Inject lateinit var notificationUtils: NotificationUtils
     @Inject lateinit var appStateHandler: AppStateHandler
+    @Inject lateinit var rxConfig: RxConfig
     lateinit var vectorComponent: VectorComponent
     private var fontThreadHandler: Handler? = null
 
@@ -84,7 +85,7 @@ class VectorApplication : Application(), HasVectorInjector, MatrixConfiguration.
         vectorComponent = DaggerVectorComponent.factory().create(this)
         vectorComponent.inject(this)
         vectorUncaughtExceptionHandler.activate(this)
-        setupRxPlugin()
+        rxConfig.setupRxPlugin()
 
         if (BuildConfig.DEBUG) {
             Timber.plant(Timber.DebugTree())

vector/src/main/java/im/vector/riotx/core/rx/Rx.kt

@@ -17,19 +17,26 @@
 package im.vector.riotx.core.rx
 
 import im.vector.riotx.BuildConfig
+import im.vector.riotx.features.settings.VectorPreferences
 import io.reactivex.plugins.RxJavaPlugins
 import timber.log.Timber
+import javax.inject.Inject
 
-/**
- * Make sure unhandled Rx error does not crash the app in production
- */
-fun setupRxPlugin() {
-    RxJavaPlugins.setErrorHandler { throwable ->
-        Timber.e(throwable, "RxError")
+class RxConfig @Inject constructor(
+        private val vectorPreferences: VectorPreferences
+) {
 
-        // Avoid crash in production
-        if (BuildConfig.DEBUG) {
-            throw throwable
+    /**
+     * Make sure unhandled Rx error does not crash the app in production
+     */
+    fun setupRxPlugin() {
+        RxJavaPlugins.setErrorHandler { throwable ->
+            Timber.e(throwable, "RxError")
+
+            // Avoid crash in production
+            if (BuildConfig.DEBUG || vectorPreferences.failFast()) {
+                throw throwable
+            }
         }
     }
 }

vector/src/main/java/im/vector/riotx/features/settings/VectorPreferences.kt

@@ -151,6 +151,7 @@ class VectorPreferences @Inject constructor(private val context: Context) {
         private const val SETTINGS_DEVELOPER_MODE_PREFERENCE_KEY = "SETTINGS_DEVELOPER_MODE_PREFERENCE_KEY"
         private const val SETTINGS_LABS_SHOW_HIDDEN_EVENTS_PREFERENCE_KEY = "SETTINGS_LABS_SHOW_HIDDEN_EVENTS_PREFERENCE_KEY"
         private const val SETTINGS_LABS_ENABLE_SWIPE_TO_REPLY = "SETTINGS_LABS_ENABLE_SWIPE_TO_REPLY"
+        private const val SETTINGS_DEVELOPER_MODE_FAIL_FAST_PREFERENCE_KEY = "SETTINGS_DEVELOPER_MODE_FAIL_FAST_PREFERENCE_KEY"
 
         // analytics
         const val SETTINGS_USE_ANALYTICS_KEY = "SETTINGS_USE_ANALYTICS_KEY"
@@ -266,6 +267,10 @@ class VectorPreferences @Inject constructor(private val context: Context) {
         return developerMode() && defaultPrefs.getBoolean(SETTINGS_LABS_ALLOW_EXTENDED_LOGS, false)
     }
 
+    fun failFast(): Boolean {
+        return developerMode() && defaultPrefs.getBoolean(SETTINGS_DEVELOPER_MODE_FAIL_FAST_PREFERENCE_KEY, false)
+    }
+
     /**
      * Tells if we have already asked the user to disable battery optimisations on android >= M devices.
      *

vector/src/main/res/values/strings_riotX.xml

@@ -20,4 +20,7 @@
 
     <string name="autocomplete_limited_results">Showing only the first results, type more letters…</string>
 
+    <string name="settings_developer_mode_fail_fast_title">Fail-fast</string>
+    <string name="settings_developer_mode_fail_fast_summary">RiotX may crash more often when an unexpected error occurs</string>
+
 </resources>

vector/src/main/res/xml/vector_settings_advanced_settings.xml

@@ -23,6 +23,13 @@
             android:summary="@string/labs_allow_extended_logging_summary"
             android:title="@string/labs_allow_extended_logging" />
 
+        <im.vector.riotx.core.preference.VectorSwitchPreference
+            android:defaultValue="false"
+            android:dependency="SETTINGS_DEVELOPER_MODE_PREFERENCE_KEY"
+            android:key="SETTINGS_DEVELOPER_MODE_FAIL_FAST_PREFERENCE_KEY"
+            android:summary="@string/settings_developer_mode_fail_fast_summary"
+            android:title="@string/settings_developer_mode_fail_fast_title" />
+
         <!-- TODO Display unsupported events -->
 
     </im.vector.riotx.core.preference.VectorPreferenceCategory>