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Commit 503ba60b authored by Neil Fuller's avatar Neil Fuller
Browse files

Handle repeated uncertainty better 

When a primary LTZP reports it is uncertain, the uncertainty timer is
started in the location_time_zone_manager before the uncertainty is
passed on.  This gives the primary LTZP a period to "change its mind"
and also the secondard is started. Once the timer completes without the
uncertainty being contradicted the uncertainty is passed on to the
time_zone_detector. "Certain" reports are always passed on immediately
and cause the timer to be cancelled.

The old logic would repeat this timeout logic even if the
location_time_zone_manager had already completed the uncertainty timeout
and reported it was uncertain.

The new logic will pass on uncertainty immediately if the
location_time_zone_manager is already uncertain. There's no obvious
benefit to starting the timeout again and it looks confusing in the
logs.

Bug: 268162169
Test: atest services/tests/servicestests/src/com/android/server/timezonedetector/location/LocationTimeZoneProviderControllerTest.java
Change-Id: Id596de4067dc41cb1e9d46a920e7610a0eb06933
parent 46c8b8b2

services/core/java/com/android/server/timezonedetector/location/LocationTimeZoneProviderController.java

+25 −11
Original line number Diff line number Diff line
@@ -303,8 +303,7 @@ class LocationTimeZoneProviderController implements Dumpable { 
    private void reportSuggestionEvent(

            @NonNull GeolocationTimeZoneSuggestion suggestion, @NonNull String reason) {

        LocationTimeZoneAlgorithmStatus algorithmStatus = generateCurrentAlgorithmStatus();

        LocationAlgorithmEvent event = new LocationAlgorithmEvent(

                algorithmStatus, suggestion);

        LocationAlgorithmEvent event = new LocationAlgorithmEvent(algorithmStatus, suggestion);

        event.addDebugInfo(reason);

        reportEvent(event);

    }
@@ -728,6 +727,20 @@ class LocationTimeZoneProviderController implements Dumpable { 
        // Start the uncertainty timeout if needed to ensure the controller will eventually make an

        // uncertain suggestion if no success event arrives in time to counteract it.

        if (!mUncertaintyTimeoutQueue.hasQueued()) {

            if (STATE_UNCERTAIN.equals(mState.get())) {

                // If the controller is already uncertain, there's no reason to start a timeout;

                // just forward the suggestion immediately to make it obvious in the logs what has

                // happened. Making a new suggestion potentially captures new LTZP status info.

                GeolocationTimeZoneSuggestion suggestion =

                        GeolocationTimeZoneSuggestion.createUncertainSuggestion(

                                uncertaintyStartedElapsedMillis);

                String debugInfo = "Uncertainty received from " + provider.getName() + ":"

                        + " primary=" + mPrimaryProvider

                        + ", secondary=" + mSecondaryProvider

                        + ", uncertaintyStarted="

                        + Duration.ofMillis(uncertaintyStartedElapsedMillis);

                reportSuggestionEvent(suggestion, debugInfo);

            } else {

                debugLog("Starting uncertainty timeout: reason=" + reason);



                Duration uncertaintyDelay = mEnvironment.getUncertaintyDelay();
@@ -736,12 +749,13 @@ class LocationTimeZoneProviderController implements Dumpable { 
                                provider, uncertaintyStartedElapsedMillis, uncertaintyDelay),

                        uncertaintyDelay.toMillis());

            }

        }



        if (provider == mPrimaryProvider) {

            // (Try to) start the secondary. It could already be started, or enabling might not

            // succeed if the provider has previously reported it is perm failed. The uncertainty

            // timeout (set above) is used to ensure that an uncertain suggestion will be made if

            // the secondary cannot generate a success event in time.

            // timeout (may be set above) is used to ensure that an uncertain suggestion will be

            // made if the secondary cannot generate a success event in time.

            tryStartProvider(mSecondaryProvider, mCurrentUserConfiguration);

        }

    }

services/tests/servicestests/src/com/android/server/timezonedetector/location/LocationTimeZoneProviderControllerTest.java

+163 −18
Original line number Diff line number Diff line
@@ -88,18 +88,21 @@ public class LocationTimeZoneProviderControllerTest { 
    private static final long ARBITRARY_TIME_MILLIS = 12345L;



    private static final TimeZoneProviderEvent USER1_SUCCESS_LOCATION_TIME_ZONE_EVENT1 =

            createSuggestionEvent(asList("Europe/London"));

            createSuggestionEvent(ARBITRARY_TIME_MILLIS, asList("Europe/London"));

    private static final TimeZoneProviderEvent USER1_SUCCESS_LOCATION_TIME_ZONE_EVENT2 =

            createSuggestionEvent(asList("Europe/Paris"));

            createSuggestionEvent(ARBITRARY_TIME_MILLIS + 1, asList("Europe/Paris"));

    private static final TimeZoneProviderStatus UNCERTAIN_PROVIDER_STATUS =

            new TimeZoneProviderStatus.Builder()

                    .setLocationDetectionDependencyStatus(DEPENDENCY_STATUS_TEMPORARILY_UNAVAILABLE)

                    .setConnectivityDependencyStatus(DEPENDENCY_STATUS_OK)

                    .setTimeZoneResolutionOperationStatus(OPERATION_STATUS_UNKNOWN)

                    .build();

    private static final TimeZoneProviderEvent USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT =

    private static final TimeZoneProviderEvent USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1 =

            TimeZoneProviderEvent.createUncertainEvent(

                    ARBITRARY_TIME_MILLIS, UNCERTAIN_PROVIDER_STATUS);

    private static final TimeZoneProviderEvent USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT2 =

            TimeZoneProviderEvent.createUncertainEvent(

                    ARBITRARY_TIME_MILLIS + 1, UNCERTAIN_PROVIDER_STATUS);

    private static final TimeZoneProviderEvent USER1_PERM_FAILURE_LOCATION_TIME_ZONE_EVENT =

            TimeZoneProviderEvent.createPermanentFailureEvent(ARBITRARY_TIME_MILLIS, "Test");
@@ -328,7 +331,7 @@ public class LocationTimeZoneProviderControllerTest { 


        // Finally, the uncertainty timeout should cause the controller to make an uncertain

        // suggestion.

        mTestThreadingDomain.executeNext();

        mTestThreadingDomain.executeAll();



        assertControllerState(controller, STATE_UNCERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(
@@ -649,7 +652,7 @@ public class LocationTimeZoneProviderControllerTest { 
        // cause a suggestion to be made straight away, but the uncertainty timeout should be

        // started and the secondary should be started.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(
@@ -680,7 +683,7 @@ public class LocationTimeZoneProviderControllerTest { 
        // cause a suggestion to be made straight away, but the uncertainty timeout should be

        // started. Both providers are now started, with no initialization timeout set.

        mTestSecondaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(
@@ -693,7 +696,7 @@ public class LocationTimeZoneProviderControllerTest { 


        // Simulate time passing. This means the uncertainty timeout should fire and the uncertain

        // suggestion should be made.

        mTestThreadingDomain.executeNext();

        mTestThreadingDomain.executeAll();



        assertControllerState(controller, STATE_UNCERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(
@@ -702,7 +705,7 @@ public class LocationTimeZoneProviderControllerTest { 
                PROVIDER_STATE_STARTED_UNCERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestMetricsLogger.assertStateChangesAndCommit(STATE_UNCERTAIN);

        mTestCallback.assertEventWithUncertainSuggestionReportedAndCommit(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);

        assertFalse(controller.isUncertaintyTimeoutSet());

    }
@@ -744,7 +747,7 @@ public class LocationTimeZoneProviderControllerTest { 
        // Uncertainty should not cause a suggestion to be made straight away, but the uncertainty

        // timeout should be started and the secondary should be started.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(
@@ -771,6 +774,147 @@ public class LocationTimeZoneProviderControllerTest { 
        assertFalse(controller.isUncertaintyTimeoutSet());

    }



    @Test

    public void enabled_uncertaintyDuringUncertaintyTimeoutTriggersNoSuggestion() {

        LocationTimeZoneProviderController controller = new LocationTimeZoneProviderController(

                mTestThreadingDomain, mTestMetricsLogger, mTestPrimaryLocationTimeZoneProvider,

                mTestSecondaryLocationTimeZoneProvider, false /* recordStateChanges */);

        TestEnvironment testEnvironment = new TestEnvironment(

                mTestThreadingDomain, controller, USER1_CONFIG_GEO_DETECTION_ENABLED);



        // Initialize and check initial state.

        controller.initialize(testEnvironment, mTestCallback);



        assertControllerState(controller, STATE_INITIALIZING);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_INITIALIZING, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestSecondaryLocationTimeZoneProvider.assertIsStoppedAndCommit();

        mTestMetricsLogger.assertStateChangesAndCommit(

                STATE_PROVIDERS_INITIALIZING, STATE_STOPPED, STATE_INITIALIZING);

        mTestCallback.assertEventWithNoSuggestionReportedAndCommit(

                DETECTION_ALGORITHM_STATUS_RUNNING);

        assertFalse(controller.isUncertaintyTimeoutSet());



        // Simulate a location event being received from the primary provider. This should cause a

        // suggestion to be made.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_SUCCESS_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_CERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestSecondaryLocationTimeZoneProvider.assertIsStoppedAndCommit();

        mTestMetricsLogger.assertStateChangesAndCommit(STATE_CERTAIN);

        mTestCallback.assertEventWithCertainSuggestionReportedAndCommit(

                USER1_SUCCESS_LOCATION_TIME_ZONE_EVENT1);

        assertFalse(controller.isUncertaintyTimeoutSet());



        // Uncertainty should not cause a suggestion to be made straight away, but the uncertainty

        // timeout should be started and the secondary should be started.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_UNCERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestSecondaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_INITIALIZING, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestMetricsLogger.assertStateChangesAndCommit();

        mTestCallback.assertNoEventReported();

        assertUncertaintyTimeoutSet(testEnvironment, controller);



        // Another uncertain suggestion from the primary during the uncertainty timeout should have

        // no effect.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);

        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_UNCERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestSecondaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_INITIALIZING, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestMetricsLogger.assertStateChangesAndCommit();

        mTestCallback.assertNoEventReported();

        assertUncertaintyTimeoutSet(testEnvironment, controller);

    }



    @Test

    public void enabled_uncertaintyAfterUncertaintyTimeoutTriggersImmediateSuggestion() {

        LocationTimeZoneProviderController controller = new LocationTimeZoneProviderController(

                mTestThreadingDomain, mTestMetricsLogger, mTestPrimaryLocationTimeZoneProvider,

                mTestSecondaryLocationTimeZoneProvider, false /* recordStateChanges */);

        TestEnvironment testEnvironment = new TestEnvironment(

                mTestThreadingDomain, controller, USER1_CONFIG_GEO_DETECTION_ENABLED);



        // Initialize and check initial state.

        controller.initialize(testEnvironment, mTestCallback);



        assertControllerState(controller, STATE_INITIALIZING);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_INITIALIZING, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestSecondaryLocationTimeZoneProvider.assertIsStoppedAndCommit();

        mTestMetricsLogger.assertStateChangesAndCommit(

                STATE_PROVIDERS_INITIALIZING, STATE_STOPPED, STATE_INITIALIZING);

        mTestCallback.assertEventWithNoSuggestionReportedAndCommit(

                DETECTION_ALGORITHM_STATUS_RUNNING);

        assertFalse(controller.isUncertaintyTimeoutSet());



        // Simulate a location event being received from the primary provider. This should cause a

        // suggestion to be made.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_SUCCESS_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_CERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestSecondaryLocationTimeZoneProvider.assertIsStoppedAndCommit();

        mTestMetricsLogger.assertStateChangesAndCommit(STATE_CERTAIN);

        mTestCallback.assertEventWithCertainSuggestionReportedAndCommit(

                USER1_SUCCESS_LOCATION_TIME_ZONE_EVENT1);

        assertFalse(controller.isUncertaintyTimeoutSet());



        // Uncertainty should not cause a suggestion to be made straight away, but the uncertainty

        // timeout should be started and the secondary should be started.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_UNCERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestSecondaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_INITIALIZING, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestMetricsLogger.assertStateChangesAndCommit();

        mTestCallback.assertNoEventReported();

        assertUncertaintyTimeoutSet(testEnvironment, controller);



        // Simulate time passing. This means the uncertainty timeout should fire and the uncertain

        // suggestion should be made.

        mTestThreadingDomain.executeAll();



        assertControllerState(controller, STATE_UNCERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_UNCERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestSecondaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_UNCERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestMetricsLogger.assertStateChangesAndCommit(STATE_UNCERTAIN);

        mTestCallback.assertEventWithUncertainSuggestionReportedAndCommit(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);

        assertFalse(controller.isUncertaintyTimeoutSet());



        // Another uncertain suggestion from the primary should cause an immediate suggestion.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT2);



        assertControllerState(controller, STATE_UNCERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_UNCERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestSecondaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(

                PROVIDER_STATE_STARTED_UNCERTAIN, USER1_CONFIG_GEO_DETECTION_ENABLED);

        mTestMetricsLogger.assertStateChangesAndCommit();

        mTestCallback.assertEventWithUncertainSuggestionReportedAndCommit(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT2);

        assertFalse(controller.isUncertaintyTimeoutSet());

    }



    @Test

    public void configChanges_enableAndDisableWithNoPreviousSuggestion() {

        LocationTimeZoneProviderController controller = new LocationTimeZoneProviderController(
@@ -965,7 +1109,7 @@ public class LocationTimeZoneProviderControllerTest { 


        // Simulate uncertainty from the secondary.

        mTestSecondaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_INITIALIZING);

        mTestPrimaryLocationTimeZoneProvider.assertIsPermFailedAndCommit();
@@ -991,7 +1135,7 @@ public class LocationTimeZoneProviderControllerTest { 


        // Simulate uncertainty from the secondary.

        mTestSecondaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertIsPermFailedAndCommit();
@@ -1085,7 +1229,7 @@ public class LocationTimeZoneProviderControllerTest { 
        // give this test the opportunity to simulate its failure. Then it will be possible to

        // demonstrate controller behavior with only the primary working.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_INITIALIZING);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(
@@ -1124,7 +1268,7 @@ public class LocationTimeZoneProviderControllerTest { 


        // Simulate uncertainty from the primary. The secondary cannot be started.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_CERTAIN);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(
@@ -1160,7 +1304,7 @@ public class LocationTimeZoneProviderControllerTest { 
        // give this test the opportunity to simulate its failure. Then it will be possible to

        // demonstrate controller behavior with only the primary working.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        assertControllerState(controller, STATE_INITIALIZING);

        mTestPrimaryLocationTimeZoneProvider.assertStateEnumAndConfigAndCommit(
@@ -1282,7 +1426,7 @@ public class LocationTimeZoneProviderControllerTest { 


        // Simulate an uncertain event from the primary. This will start the secondary.

        mTestPrimaryLocationTimeZoneProvider.simulateTimeZoneProviderEvent(

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT);

                USER1_UNCERTAIN_LOCATION_TIME_ZONE_EVENT1);



        {

            LocationTimeZoneManagerServiceState state = controller.getStateForTests();
@@ -1471,18 +1615,19 @@ public class LocationTimeZoneProviderControllerTest { 
                controller.getUncertaintyTimeoutDelayMillis());

    }



    private static TimeZoneProviderEvent createSuggestionEvent(@NonNull List<String> timeZoneIds) {

    private static TimeZoneProviderEvent createSuggestionEvent(

            long elapsedRealtimeMillis, @NonNull List<String> timeZoneIds) {

        TimeZoneProviderStatus providerStatus = new TimeZoneProviderStatus.Builder()

                .setLocationDetectionDependencyStatus(DEPENDENCY_STATUS_NOT_APPLICABLE)

                .setConnectivityDependencyStatus(DEPENDENCY_STATUS_NOT_APPLICABLE)

                .setTimeZoneResolutionOperationStatus(OPERATION_STATUS_OK)

                .build();

        TimeZoneProviderSuggestion suggestion = new TimeZoneProviderSuggestion.Builder()

                .setElapsedRealtimeMillis(ARBITRARY_TIME_MILLIS)

                .setElapsedRealtimeMillis(elapsedRealtimeMillis)

                .setTimeZoneIds(timeZoneIds)

                .build();

        return TimeZoneProviderEvent.createSuggestionEvent(

                ARBITRARY_TIME_MILLIS, suggestion, providerStatus);

                elapsedRealtimeMillis, suggestion, providerStatus);

    }



    private static void assertControllerState(LocationTimeZoneProviderController controller,

services/tests/servicestests/src/com/android/server/timezonedetector/location/TestThreadingDomain.java

+6 −0
Original line number Diff line number Diff line
@@ -142,4 +142,10 @@ class TestThreadingDomain extends ThreadingDomain { 
        mCurrentTimeMillis = queued.executionTimeMillis;

        queued.runnable.run();

    }



    void executeAll() {

        while (!mQueue.isEmpty()) {

            executeNext();

        }

    }

}