Android Bazaar and Conference Diverse 2021 Winter

11/12/2021に開催された Android Bazaar and Conference Diverse 2021 Winter で発表した 「COCOA 1.4.0 障害はなぜ起きたのか」の発表資料です。

https://japan-android-group.connpass.com/event/228215/
https://abc.android-group.jp/abcd2021w/

リンクが有効なPDFは、プレゼンテーション下のボタンからダウンロードできます。
アーカイブPDF: https://blog.keiji.dev/archives/abcd2021-winter.pdf

本資料の内容は、
技術情報の提供を通じた技術的なコミュニケーションを目的としており、
発表者の所属または関与する組織の公式見解、方針等を述べるものではありません。

Transcript

1. ARIYAMA Keiji - σδλϧிAndroidʢΞϓϦʣΤϯδχΞ / ༗ݶձࣾγʔϦε୅ද
   COCOA 1.4.0 ো֐͸

   ͳͥى͖ͨͷ͔
   1
   

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2. ༗ࢁܓೋʢ"3*:".",FJKJʣ
   σδλϧி"OESPJEʢΞϓϦʣΤϯδχΞ
   

   $-*4$0 -5%୅ද
   Photo : Koji MORIGUCHI (MORIGCHOWDER)
   !LFJKJ@BSJZBNB
   keiji
   "OESPJEΞϓϦ։ൃऀ
   

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3. ໔੹ࣄ߲
   Disclaimer
   3
   ຊࢿྉͷ಺༰͸ɺ
   
   ٕज़৘ใͷఏڙΛ௨ٕͨ͡ज़తͳίϛϡχέʔγϣϯΛ໨తͱ͓ͯ͠Γɺ
   
   ॴଐ·ͨ͸ؔ༩͢Δ૊৫ͷެࣜݟղɺํ਑౳Λड़΂Δ΋ͷͰ͸͋Γ·ͤΜɻ
   

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4. ઀৮֬ೝΞϓϦ
   COVID-19 Contact-Con
   fi
   rming Application
   https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/cocoa_00138.html
   ʠްੜ࿑ಇল͸ɺ৽ܕίϩφ΢Πϧεײછ঱ͷ֦େ๷ࢭʹ
   ࢿ͢ΔΑ͏ɺ৽ܕίϩφ΢Πϧεײછ঱ରࡦςοΫνʔϜͱ
   ࿈ܞͯ͠ɺ৽ܕίϩφ΢Πϧε઀৮֬ೝΞϓϦʢ$0$0"
   ˞ʣΛ։ൃ͠·ͨ͠ɻࣗ͝਎ͷεϚʔτϑΥϯʹΠϯετʔ
   ϧͯ͠ɺར༻͍͖ͨͩ·͢Α͏͓ئ͍͠·͢ʡ
   ʢްੜ࿑ಇল΢ΣϒαΠτΑΓʣ
   4
   

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5. 5
   https://play.google.com/store/apps/details?id=jp.go.mhlw.covid19radar&hl=ja
   Android൛
   https://apps.apple.com/jp/app/id1516764458
   iOS൛
   

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6. COCOA Open Source Project
   • WebαΠτ

   https://cocoa-mhlw.github.io/cocoa/
   
   • GitHub ϦϙδτϦ

   https://github.com/cocoa-mhlw/cocoa
   6
   

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7. COCOA։ൃମ੍ ུ֓ਤ
   7
   (JU)VCίϛϡχςΟ ։ൃνʔϜ
   ࿈ܞνʔϜ
   "3*:"."
   

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8. ໨࣍
   ͳʹ͕ى͖ͨͷ͔
   
   ো֐͸ɺͳͥى͖ͨͷ͔
   
   ࠓޙͷରԠ
   
   ݕ౼தͷ࠶ൃ๷ࢭࡦ
   8
   

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9. ͳʹ͕ى͖ͨͷ͔
   9
   

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10. v1.4.0 ϦϦʔε
    
    
    2021/11/25 15:00
    10
    

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11. 11
    https://github.com/cocoa-mhlw/cocoa/issues/517
    2021/11/25 16:17
    

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12. 12
    16:20
    

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13. 13
    16:49
    

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14. 14
    17:11
    Xamarin android App crashes with error android.runtime.JavaProxyThrowable reported in Google Play Console Vitals
    
    https://docs.microsoft.com/en-us/answers/questions/418448/xamarin-android-app-crashes-with-error-androidrunt.html
    

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15. ΤϥʔൃੜՕॴ
    15
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_4_0/Covid19Radar/Covid19Radar/Services/Migration/Migrator_1_3_0.cs
    private void MigrateDateTimeToEpoch(string dateTimeKey, string epochKey, TimeSpan differential)
    
    
    {
    
    
    string dateTimeStr = _preferencesService.GetValue(dateTimeKey, DateTime.UtcNow.ToString());
    
    
    DateTime dateTime;
    
    
    try
    
    
    {
    
    
    dateTime = DateTime.SpecifyKind(DateTime.Parse(dateTimeStr) + differential, DateTimeKind.Utc);
    
    
    }
    
    
    catch (FormatException exception)
    
    
    {
    
    
    _loggerService.Exception($"Parse dateTime FormatException occurred. {dateTimeStr}", exception);
    
    
    dateTime = DateTime.UtcNow;
    
    
    }
    
    
    _preferencesService.SetValue(epochKey, dateTime.ToUnixEpoch());
    
    
    _preferencesService.RemoveValue(dateTimeKey);
    
    
    }
    
    
    

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16. 16
    17:30
    

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17. 17
    18:07
    

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18. Hotfix
    18
    Hot
    fi
    x #517
    
    https://github.com/cocoa-mhlw/cocoa/pull/518
    private void MigrateDateTimeToEpoch(string dateTimeKey, string epochKey, TimeSpan differential, DateTime fallbackDateTime)
    
    
    {
    
    
    string dateTimeStr = _preferencesService.GetValue(dateTimeKey, fallbackDateTime.ToString());
    
    
    DateTime dateTime;
    
    
    try
    
    
    {
    
    
    dateTime = DateTime.SpecifyKind(DateTime.Parse(dateTimeStr), DateTimeKind.Utc);
    
    
    }
    
    
    catch (FormatException exception)
    
    
    {
    
    
    _loggerService.Exception($"Parse dateTime FormatException occurred. {dateTimeStr}", exception);
    
    
    dateTime = fallbackDateTime;
    
    
    }
    
    
    try
    
    
    {
    
    
    dateTime += differential;
    
    
    }
    
    
    catch (ArgumentOutOfRangeException exception)
    
    
    {
    
    
    _loggerService.Exception($"{dateTimeStr} {differential} The added or subtracted value results in an un-representable DateTime.", exception);
    
    
    }
    
    
    _preferencesService.SetValue(epochKey, dateTime.ToUnixEpoch());
    
    
    _preferencesService.RemoveValue(dateTimeKey);
    
    
    }
    
    
    18:35
    

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19. 19
    19:19
    

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20. 20
    2021/11/26 00:28
    

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21. 21
    * 20:12 - ։ൃνʔϜ ར༻ऀ͔Βͷ໰͍߹Θͤঢ়گΛڞ༗
    
    
    * 20:13 - ։ൃνʔϜ v1.1.5ҎલʹΞϓϦͷར༻Λ։࢝͢Δͱར༻ن໿ͷಉҙ೔෇͕DateTime࠷খ஋ͷ··ͱͳΔ͜ͱ͕ݪҼͱ൑໌
    
    
    * ։ൃνʔϜ ো֐ͷ࠶ݱํ๏Λ֬ఆ
    
    
    * 20:39 - ։ൃνʔϜ ϦϦʔεςετͷ࡞੒։࢝
    
    
    * 22:40 - ։ൃνʔϜ ϦϦʔεςετͷ࡞੒׬ྃ
    
    
    * 23:16 - ։ൃνʔϜ ϦϦʔεςετͷ࣮ࢪ׬ྃ
    
    
    * ։ൃνʔϜ ४උͨ͠v1.4.0͕Ϋϥογϡ͢Δ୺຤ͷΞϓϦΛ੡඼൛ΞϓϦv1.4.1΁Ξοϓσʔτɺਖ਼ৗىಈ͠໰୊͕ղফ͍ͯ͠Δ͜ͱΛ֬ೝ
    26/11/2021 00:28
    2021/11/25 19:19
    

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22. v1.4.1 HotfixϦϦʔε
    22
    GitHubίϛϡχςΟͷΈͳ͞Μ
    ͝ڠྗɺຊ౰ʹ͋Γ͕ͱ͏͍͟͝·ͨ͠ɻ
    * 11/26
    
    
    * 00:28 - ։ൃνʔϜ v1.4.1 ৹ࠪఏग़׬ྃʢGoogle Play, AppStoreʣ
    
    
    * 10:10 - ։ൃνʔϜ v1.4.1 AppStoreͰϦϦʔε
    
    
    * ։ൃνʔϜ iOS୺຤7୆Ͱެ։͞ΕͨΞϓϦv1.4.1͕ىಈͰ͖Δ͜ͱΛ֬ೝ
    
    
    * 10:47 - GitHub iOS൛ͷ෮چใࠂ
    
    
    * 11/27
    
    
    * 11:28 - ։ൃνʔϜ v1.4.1 Google PlayͰϦϦʔε։࢝
    
    
    * 11:40 - GitHub Android൛ͷ෮چใࠂ
    
    
    * ։ൃνʔϜ Android୺຤1୆Ͱެ։͞ΕͨΞϓϦv1.4.1͕ىಈͰ͖Δ͜ͱΛ֬ೝ
    

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23. ো֐͸ɺͳͥى͖ͨͷ͔
    23
    

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24. ͜ͷॲཧ͸ͳʹʁ
    v1.3.0΁ͷϚΠάϨʔγϣϯॲཧ
    24
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_4_0/Covid19Radar/Covid19Radar/Services/Migration/Migrator_1_3_0.cs
    private void MigrateDateTimeToEpoch(string dateTimeKey, string epochKey, TimeSpan differential)
    
    
    {
    
    
    string dateTimeStr = _preferencesService.GetValue(dateTimeKey, DateTime.UtcNow.ToString());
    
    
    DateTime dateTime;
    
    
    try
    
    
    {
    
    
    dateTime = DateTime.SpecifyKind(DateTime.Parse(dateTimeStr) + differential, DateTimeKind.Utc);
    
    
    }
    
    
    catch (FormatException exception)
    
    
    {
    
    
    _loggerService.Exception($"Parse dateTime FormatException occurred. {dateTimeStr}", exception);
    
    
    dateTime = DateTime.UtcNow;
    
    
    }
    
    
    _preferencesService.SetValue(epochKey, dateTime.ToUnixEpoch());
    
    
    _preferencesService.RemoveValue(dateTimeKey);
    
    
    }
    
    
    

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25. ϚΠάϨʔγϣϯʢMigrationʣॲཧ
    όʔδϣϯؒͰҟͳΔσʔλܗࣜΛҠߦ͢Δ
    • σʔλܗࣜͷҟͳΔ࣌ظ
    
    • v1.0.0 - v1.2.1
    
    • v1.2.2 - v1.2.6
    25
    

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26. v1.0.0-v1.2.1
    • ΞϓϦͷσʔλ͸Application.Propertiesʹอଘ
    
    • Xamarin.Forms͕༻ҙ͍ͯ͠ΔӬଓԽํࣜ
    
    • ࣮ମϑΝΠϧ͸Binary XMLܗࣜ
    26
    

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27. Application.Propertiesͷ՝୊
    • Application.Properties͸εϨουηʔϑͰ͸ͳ͍
    
    • ෳ਺εϨου͔ΒΞΫηε͢Δͱσʔλ͕յΕΔ͜ͱ͕͋Δ
    
    • COCOA ಥવॳظԽ͞ΕΔ໰୊

    https://github.com/cocoa-mhlw/cocoa/issues/16
    27
    

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28. v1.2.2-v1.2.5
    • ΞϓϦͷσʔλ͸ϓϥοτϑΥʔϜݻ༗ͷܗࣜʹอଘ
    
    • AndroidͰ͸`SharedPreferences`
    
    • iOSͰ͸`NSUserDefaults`
    
    • Application.Properties͔ΒͷҠߦʢϚΠάϨʔγϣϯʣ͕௥Ճ
    28
    

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29. v1.2.2-v1.2.5ͷ՝୊
    ෳ਺ΫϥεʹϚΠάϨʔγϣϯॲཧ͕෼ࢄ͍ͯͨ͠
    • ར༻ن໿ͱϓϥΠόγʔϙϦγʔͷ߹ҙ೔࣌

    https://github.com/cocoa-mhlw/cocoa/blob/release_1_2_5/Covid19Radar/
    Covid19Radar/Services/TermsUpdateService.cs
    
    • ར༻։࢝೔ɾར༻ن໿ͱϓϥΠόγʔϙϦγʔͷ߹ҙϑϥά

    https://github.com/cocoa-mhlw/cocoa/blob/release_1_2_5/Covid19Radar/
    Covid19Radar/Services/UserDataService.cs
    
    • ઀৮ه࿥

    https://github.com/cocoa-mhlw/cocoa/blob/release_1_2_5/Covid19Radar/
    Covid19Radar/Services/ExposureNoti
    fi
    cationService.cs

    29
    

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30. v1.2.2-v1.2.5ͷ՝୊
    ϓϥοτϑΥʔϜݻ༗ͷҠߦॲཧΛαʔυύʔςΟϥΠϒϥϦΛվม͢ΔܗͰهड़͍ͯͨ͠
    30
    namespace Xamarin.ExposureNotifications
    
    
    {
    
    
    public static partial class ExposureNotification
    
    
    {
    
    
    private static readonly string[] OldWorkNames = { "exposurenotification" }; // Array of old work-name.
    
    
    private static readonly string CurrentWorkName = "cocoaexposurenotification"; // Current work-name. (changed policy from `replace` to `keep`)
    
    
    // Schedule background work (Customization by COCOA)
    
    
    static Task PlatformScheduleFetch()
    
    
    {
    
    
    CancelOldWork();
    
    
    var workRequest = CreatePeriodicWorkRequest();
    
    
    EnqueueUniquePeriodicWork(workRequest);
    
    
    return Task.CompletedTask;
    
    
    }
    
    
    private static void CancelOldWork()
    
    
    {
    
    
    var workManager = WorkManager.GetInstance(Essentials.Platform.AppContext);
    
    
    foreach (var oldWorkName in OldWorkNames)
    
    
    {
    
    
    workManager.CancelUniqueWork(oldWorkName);
    
    
    }
    
    
    }
    
    
    }
    
    
    }
    
    
    }
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_2_5/Covid19Radar/Xamarin.ExposureNoti
    fi
    cation/ExposureNoti
    fi
    cation.customize.android.cs
    

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31. v1.2.6 ϚΠάϨʔγϣϯͷ࢓૊ΈΛಋೖ
    ෼ࢄͤͣ͞ɺҰΧॴͰॲཧ͢Δ
    • fromVersion → toVersionͰඞཁͳϚΠάϨʔγϣϯΛॱ࣮࣍ߦ
    
    • fromVersion: ઃఆʹه࿥͞ΕΔʢ·ͨ͸ਪଌ͢ΔʣΞϓϦͷόʔδϣϯ
    
    • toVersion: ݱࡏͷΞϓϦͷόʔδϣϯ
    31
    Add feature migrations mechanism #165
    
    https://github.com/cocoa-mhlw/cocoa/pull/165
    

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32. v1.2.6 ϦϦʔε
    
    
    2021/09/08
    32
    

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33. ͜ͷॲཧ͸ͳʹʁ
    **v1.3.0** ΁ͷϚΠάϨʔγϣϯॲཧ
    33
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_4_0/Covid19Radar/Covid19Radar/Services/Migration/Migrator_1_3_0.cs
    private void MigrateDateTimeToEpoch(string dateTimeKey, string epochKey, TimeSpan differential)
    
    
    {
    
    
    string dateTimeStr = _preferencesService.GetValue(dateTimeKey, DateTime.UtcNow.ToString());
    
    
    DateTime dateTime;
    
    
    try
    
    
    {
    
    
    dateTime = DateTime.SpecifyKind(DateTime.Parse(dateTimeStr) + differential, DateTimeKind.Utc);
    
    
    }
    
    
    catch (FormatException exception)
    
    
    {
    
    
    _loggerService.Exception($"Parse dateTime FormatException occurred. {dateTimeStr}", exception);
    
    
    dateTime = DateTime.UtcNow;
    
    
    }
    
    
    _preferencesService.SetValue(epochKey, dateTime.ToUnixEpoch());
    
    
    _preferencesService.RemoveValue(dateTimeKey);
    
    
    }
    
    
    

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34. v1.2.6 ·Ͱͷ՝୊
    ೔࣌৘ใͷอଘܗࣜ
    • v1.2.6࣌఺ͰɺCOCOAʹ͸4ͭͷ೔࣌৘ใΛอଘ
    
    • ࢖༻։࢝೔࣌ʢStartDateTimeʣ
    
    • ར༻ن໿ʹ߹ҙͨ͠೔࣌ʢTermsOfServiceLastUpdateDateTimeʣ
    
    • ϓϥΠόγʔϙϦγʔʹ߹ҙͨ͠೔࣌
    ʢPrivacyPolicyLastUpdateDateTimeʣ
    
    • ઀৮֬ೝͨ͠਍அΩʔͷ࠷৽ͷ࡞੒೔ʢLastProcessTekTimestampʣ
    34
    https://cocoa-mhlw.github.io/cocoa/docs/appendix/preference_speci
    fi
    cation/#v122---v126
    

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35. จࣈྻͱͯ͠อଘ͞Εͨ೔࣌৘ใ
    • LastProcessTekTimestampΛআ͍ͨ3ͭͷ೔࣌৘ใΛจࣈྻͱͯ͠อଘ
    
    • ࢖༻։࢝೔࣌ʢStartDateTimeʣ
    
    • ར༻ن໿ʹ߹ҙͨ͠೔࣌ʢTermsOfServiceLastUpdateDateTimeʣ
    
    • ϓϥΠόγʔϙϦγʔʹ߹ҙͨ͠೔࣌
    ʢPrivacyPolicyLastUpdateDateTimeʣ
    
    • ઀৮֬ೝͨ͠਍அΩʔͷ࠷৽ͷ࡞੒೔ʢLastProcessTekTimestampʣ
    35
    https://cocoa-mhlw.github.io/cocoa/docs/appendix/preference_speci
    fi
    cation/#v122---v126
    

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36. ೔࣌จࣈྻ͸ϑΥʔϚοτࢦఆͳ͠ͷDateTime.ToString()ͷ݁Ռ
    DateTime.ToString()ͷ݁Ռ͸࣮ߦ؀ڥʢݴޠɾϩέʔϧʣʹґଘ͢Δ
    36
    using System;
    
    
    using System.Globalization;
    
    
    
    
    public class Program
    
    
    {
    
    
    public static void Main()
    
    
    {
    
    
    CultureInfo culture = CultureInfo.CreateSpecificCulture("ja-JP");
    
    
    CultureInfo.CurrentCulture = culture;
    
    
    var datetime = new DateTime(2021, 12, 11);
    
    
    
    
    Console.WriteLine(datetime.ToString());
    
    
    }
    
    
    }
    2021/12/11 0:00:00
    

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37. ֤ϩέʔϧͰͷDateTime.ToString()ͷ࣮ߦ݁Ռ
    2021೥12݄11೔ new DateTime(2021, 12, 11).ToString()
    • ೔ຊޠ-೔ຊʢja-JPʣ

    → 2021/12/11 0:00:00
    
    • ӳޠ-ΞϝϦΧ߹ऺࠃʢen-USʣ

    → 12/11/2021 12:00:00 AM
    
    • ӳޠ-ӳࠃʢen-GBʣ

    → 11/12/2021 00:00:00
    
    • ӳޠ-೔ຊʢen-JPʣ

    → 12/11/2021 12:00:00 AM
    37
    

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38. ʮӳޠɾӳࠃʢen-GBʣʯʹઃఆ͍ͯ͠Δਓ͕ɺ
    
    
    ೔ຊʹ౸ண͙ͯ͢͠ʹCOCOAΛΠϯετʔϧɻ
    
    
    ར༻։࢝ޙɺઃఆΛʮӳޠɾ೔ຊʢen-JPʣʯʹ੾Γସ͑ͨΒʁ
    38
    

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39. en-GBͰอଘ͞ΕΔ೔࣌จࣈྻ
    39
    "11/12/2021 00:00:00"
    

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40. en-JPͰղऍ͞ΕΔ೔࣌
    40
    using System;
    
    
    using System.Globalization;
    
    
    
    
    public class Program
    
    
    {
    
    
    public static void Main()
    
    
    {
    
    
    CultureInfo culture = CultureInfo.CreateSpecificCulture("en-JP");
    
    
    CultureInfo.CurrentCulture = culture;
    
    
    var datetime = DateTime.Parse("11/12/2021 00:00:00");
    
    
    
    
    Console.WriteLine(datetime.ToString());
    
    
    }
    
    
    }
    "11/12/2021 12:00:00 AM"
    

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41. ೔࣌৘ใͱͯ͠ղऍͰ͖ͳ͍έʔε
    41
    using System;
    
    
    using System.Globalization;
    
    
    
    
    public class Program
    
    
    {
    
    
    public static void Main()
    
    
    {
    
    
    CultureInfo culture = CultureInfo.CreateSpecificCulture("en-JP");
    
    
    CultureInfo.CurrentCulture = culture;
    
    
    var datetime = DateTime.Parse("25/12/2021 00:00:00");
    
    
    
    
    Console.WriteLine(datetime.ToString());
    
    
    }
    
    
    }
    Unhandled exception. System.FormatException: String '25/12/2021 00:00:00' was not recognized as a valid DateTime.
    
    
    at System.DateTime.Parse(String s)
    
    
    at Program.Main()
    

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42. ؔ࿈͢Δ՝୊
    • [Android] ୺຤ͷݴޠΛมߋޙʮϓϥΠόγʔϙϦγʔͷվఆʯ͕࠶දࣔ͞Ε
    Δ

    https://github.com/cocoa-mhlw/cocoa/issues/49
    
    • ֤छ೔෇͕ϩέʔϧґଘͷϑΥʔϚοτͰอଘ͞ΕΔ

    https://github.com/cocoa-mhlw/cocoa/issues/51
    
    • [iOS] ར༻։࢝ޙɺ୺຤ϩέʔϧΛมߋ͢Δͱ࢖༻։࢝೔͕Ϧηοτ͞Εଓ͚
    Δ

    https://github.com/cocoa-mhlw/cocoa/issues/124
    42
    

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43. v1.3.0ͷϚΠάϨʔγϣϯॲཧ
    จࣈྻͷ೔࣌৘ใΛUNIX Epoch΁ม׵͢Δ
    43
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_4_0/Covid19Radar/Covid19Radar/Services/Migration/Migrator_1_3_0.cs
    public Task ExecuteAsync()
    
    
    {
    
    
    if (_preferencesService.ContainsKey(START_DATETIME))
    
    
    {
    
    
    MigrateDateTimeToEpoch(START_DATETIME, PreferenceKey.StartDateTimeEpoch, TimeSpan.Zero);
    
    
    }
    
    
    if (_preferencesService.ContainsKey(TERMS_OF_SERVICE_LAST_UPDATE_DATETIME))
    
    
    {
    
    
    MigrateDateTimeToEpoch(
    
    
    TERMS_OF_SERVICE_LAST_UPDATE_DATETIME,
    
    
    PreferenceKey.TermsOfServiceLastUpdateDateTimeEpoch,
    
    
    -TIME_DIFFERENCIAL_JST_UTC
    
    
    );
    
    
    }
    
    
    if (_preferencesService.ContainsKey(PRIVACY_POLICY_LAST_UPDATE_DATETIME))
    
    
    {
    
    
    MigrateDateTimeToEpoch(
    
    
    PRIVACY_POLICY_LAST_UPDATE_DATETIME,
    
    
    PreferenceKey.PrivacyPolicyLastUpdateDateTimeEpoch,
    
    
    -TIME_DIFFERENCIAL_JST_UTC
    
    
    );
    
    
    }
    
    
    return Task.CompletedTask;
    
    
    }
    
    
    

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44. ͜ͷॲཧ͸ͳʹʁ
    จࣈྻͷ೔࣌৘ใΛUNIX Epoch΁ม׵͢Δ
    44
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_4_0/Covid19Radar/Covid19Radar/Services/Migration/Migrator_1_3_0.cs
    private void MigrateDateTimeToEpoch(string dateTimeKey, string epochKey, TimeSpan differential)
    
    
    {
    
    
    string dateTimeStr = _preferencesService.GetValue(dateTimeKey, DateTime.UtcNow.ToString());
    
    
    DateTime dateTime;
    
    
    try
    
    
    {
    
    
    dateTime = DateTime.SpecifyKind(DateTime.Parse(dateTimeStr) + differential, DateTimeKind.Utc);
    
    
    }
    
    
    catch (FormatException exception)
    
    
    {
    
    
    _loggerService.Exception($"Parse dateTime FormatException occurred. {dateTimeStr}", exception);
    
    
    dateTime = DateTime.UtcNow;
    
    
    }
    
    
    _preferencesService.SetValue(epochKey, dateTime.ToUnixEpoch());
    
    
    _preferencesService.RemoveValue(dateTimeKey);
    
    
    }
    
    
    

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45. ো֐͸ɺͳͥى͖ͨͷ͔
    45
    

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46. ͳͥ͜ͷίʔυΛॻ͍ͨͷ͔
    46
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_4_0/Covid19Radar/Covid19Radar/Services/Migration/Migrator_1_3_0.cs
    private void MigrateDateTimeToEpoch(string dateTimeKey, string epochKey, TimeSpan differential)
    
    
    {
    
    
    string dateTimeStr = _preferencesService.GetValue(dateTimeKey, DateTime.UtcNow.ToString());
    
    
    DateTime dateTime;
    
    
    try
    
    
    {
    
    
    dateTime = DateTime.SpecifyKind(DateTime.Parse(dateTimeStr) + differential, DateTimeKind.Utc);
    
    
    }
    
    
    catch (FormatException exception)
    
    
    {
    
    
    _loggerService.Exception($"Parse dateTime FormatException occurred. {dateTimeStr}", exception);
    
    
    dateTime = DateTime.UtcNow;
    
    
    }
    
    
    _preferencesService.SetValue(epochKey, dateTime.ToUnixEpoch());
    
    
    _preferencesService.RemoveValue(dateTimeKey);
    
    
    }
    
    
    

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47. ࣌ࠩิਖ਼ͷཁ݅
    • ೔࣌৘ใʢDateTimeʣͷจࣈྻʹ͸λΠϜκʔϯؚ͕·Ε͍ͯͳ͍ɻ

    ͔͠͠ɺར༻ن໿ɾϓϥΠόγʔϙϦγʔͷಉҙ೔࣌ʹ͍ͭͯ͸JSTͱͯ͠औΓѻ͏ඞཁ͕͋Δ
    
    • ࢖༻։࢝೔࣌ʢStartDateTimeʣ - UTC
    
    • ར༻ن໿ʹ߹ҙͨ͠೔࣌ʢTermsOfServiceLastUpdateDateTimeʣ - JST
    
    • ϓϥΠόγʔϙϦγʔʹ߹ҙͨ͠೔࣌ʢPrivacyPolicyLastUpdateDateTimeʣ - JST
    
    • ։ൃνʔϜΑΓࢦఠΛड͚ͯରԠ

    https://github.com/cocoa-mhlw/cocoa/commit/
    2b7b19de75b42e44cb1bb1c87406c99af9bd7754#di
    ff
    -180bad4c321871e2b4bf1cd58ce78d304
    0ccd6a64ec0937fd84e0b3514a00cc5
    47
    

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48. ͳͥλΠϜκʔϯͷิਖ਼ʹ
    

    ՃݮࢉΛ༻͍ͨͷ͔
    48
    

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49. ೖྗจࣈྻʹର͢Δೝࣝͷ؁͞
    • DateTimeͷܭࢉͰʢԼݶ஋ΛԼճΔɾ্ݶ஋Λ্ճΔʣͱ͖ʹྫ֎͕ൃੜ͢
    Δͱ͍͏஌͕ࣝෆ଍͍ͯͨ͠
    
    • ೖྗ͞ΕΔ஋ʹԼݶ஋ʢ0001/01/01 00:00:00ʣ͕ଘࡏ͢Δͱ͍͏ೝ͕ࣝෆ଍
    ͍ͯͨ͠
    49
    

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50. ݕ౼ͨ͠ࣄ߲
    DateTime.ToUniversalTime()
    • DateTime.ToUniversalTime()͸ɺ୺຤ͷϩέʔϧʹઃఆ͞Ε͍ͯΔ஍ҬͷλΠ
    ϜκʔϯΛʮϩʔΧϧλΠϜʢLocalʣʯͱͯ͠ɺ࣌ࠩͷิਖ਼Λߦ͏
    
    • ࠓճͷ৔߹ɺDateTimeͷݩʹͳΔจࣈྻʹλΠϜκʔϯͷ৘ใ͸ͳ͍ɻͦͷ
    ্ͰλΠϜκʔϯΛݻఆʢJST·ͨ͸UTCʣͯ࣌ࠩ͠Λิਖ਼͢Δඞཁ͕͋Δ
    
    • ୺຤ʹઃఆ͞Ε͍ͯΔϩέʔϧ͕ʮ೔ຊʢJSTʣʯͰ͋Δอূ͸ͳ͍
    50
    

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51. ݕ౼ͨ͠ࣄ߲
    TimeZoneInfo.ConvertTimeToUtc
    • ConverTimeToUtcΛ࣮ߦ͢Δ্ͰඞཁͳʮλΠϜκʔϯʢTimeZoneInfoʣʯ
    Λऔಘ͢Δࡍʹ༻͍ΔTimeZoneInfo.FindSystemTimeZoneByIdʹࢦఆ͢Δ஋
    ͕ɺϓϥοτϑΥʔϜʹΑͬͯҟͳΔɻ
    
    • WindowsͰ͸ "Tokyo Standard Time" ← MicrosoftެࣜυΩϡϝϯτͰ঺հ
    
    • LinuxͰ͸"Asia/Tokyo" ← Xamarin͸ʢʁʣͪ͜Β
    51
    ϓϥοτϑΥʔϜ͝ͱͷڍಈͷҧ͍͕ɺར༻Λسආ͢ΔཁҼʹͳͬͨ
    

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52. ೖྗจࣈྻʹର͢Δೝࣝͷ؁͞
    • DateTimeͷܭࢉͰʢԼݶ஋ΛԼճΔɾ্ݶ஋Λ্ճΔʣͱ͖ʹྫ֎͕ൃੜ͢
    Δͱ͍͏஌͕ࣝෆ଍͍ͯͨ͠
    
    • ೖྗ͞ΕΔ஋ͷൣғʹԼݶ஋ʢ0001/01/01 00:00:00ʣ͕ଘࡏ͢Δͱ͍͏ೝࣝ
    ͕ෆ଍͍ͯͨ͠
    52
    

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53. Ұ౓͸߹ҙ͠ͳ͍ͱΞϓϦ͕ར༻Ͱ͖ͳ͍
    • ࢖༻։࢝೔࣌ʢStartDateTimeʣ - UTC
    
    • ར༻ن໿ʹ߹ҙͨ͠೔࣌ʢTermsOfServiceLastUpdateDateTimeʣ - JST
    
    • ϓϥΠόγʔϙϦγʔʹ߹ҙͨ͠೔࣌
    ʢPrivacyPolicyLastUpdateDateTimeʣ - JST
    53
    

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54. ͳͥɺར༻ن໿߹ҙ೔͕
    
    
    0001/01/01 00:00:00
    
    
    ʹͳΔͷ͔
    54
    

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55. v1.2.2ͷϚΠάϨʔγϣϯ
    55
    private async Task MigrateTermAsync(TermsType termsType, bool isAgree)
    
    
    {
    
    
    var applicationPropertyKey = termsType == TermsType.TermsOfService ?
    
    
    APPLICATION_PROPERTY_TERMS_OF_SERVICE_LAST_UPDATE_DATE_KEY : APPLICATION_PROPERTY_PRIVACY_POLICY_LAST_UPDATE_DATE_KEY;
    
    
    var preferenceKey = termsType == TermsType.TermsOfService ?
    
    
    PREFERENCE_KEY_TERMS_OF_SERVICE_LAST_UPDATE_DATETIME : PREFERENCE_KEY_PRIVACY_POLICY_LAST_UPDATE_DATETIME;
    
    
    if (_preferencesService.ContainsKey(applicationPropertyKey))
    
    
    {
    
    
    return;
    
    
    }
    
    
    if (isAgree)
    
    
    {
    
    
    if (_applicationPropertyService.ContainsKey(applicationPropertyKey))
    
    
    {
    
    
    var lastUpdateDate = _applicationPropertyService.GetProperties(applicationPropertyKey).ToString();
    
    
    _preferencesService.SetValue(preferenceKey, lastUpdateDate);
    
    
    }
    
    
    else
    
    
    {
    
    
    _preferencesService.SetValue(preferenceKey, new DateTime().ToString());
    
    
    }
    
    
    }
    
    
    await _applicationPropertyService.Remove(applicationPropertyKey);
    
    
    }
    
    
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_4_0/Covid19Radar/Covid19Radar/Services/Migration/Migrator_1_2_2.cs
    
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_2_5/Covid19Radar/Covid19Radar/Services/TermsUpdateService.cs
    

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56. ೺Ѳ͍ͯ͠ͳ͔ͬͨมߋ
    • ར༻ن໿ɺϓϥΠόγʔϙϦγʔͷ߹ҙ೔࣌Λه࿥͢ΔΑ͏ʹͳͬͨͷ͸
    v1.2.0ʢ2020/12/03ϦϦʔεʣ͔Β
    
    • ϓϥΠόγʔϙϦγʔɺར༻ن໿ͷվగ͕͋ͬͨ
    
    • v1.1.5Ҏલ͸߹ҙ͔ͨ͠Ͳ͏͔ʢIsOptined, IsPolicyAcceptedʣͷΈ؅ཧ
    56
    ઀৮֬ೝΞϓϦʮCOCOAʯͷमਖ਼൛ʢʮ1.2.0ʯʣͷ഑෍Λ։࢝͠·ͨ͠ɻ
    
    https://www.mhlw.go.jp/stf/newpage_15244.html
    

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57. v1.2.2ͷϚΠάϨʔγϣϯ
    v1.1.5Ҏલ͔ΒͷϚΠάϨʔγϣϯͰൃੜ
    57
    private async Task MigrateTermAsync(TermsType termsType, bool isAgree)
    
    
    {
    
    
    var applicationPropertyKey = termsType == TermsType.TermsOfService ?
    
    
    APPLICATION_PROPERTY_TERMS_OF_SERVICE_LAST_UPDATE_DATE_KEY : APPLICATION_PROPERTY_PRIVACY_POLICY_LAST_UPDATE_DATE_KEY;
    
    
    var preferenceKey = termsType == TermsType.TermsOfService ?
    
    
    PREFERENCE_KEY_TERMS_OF_SERVICE_LAST_UPDATE_DATETIME : PREFERENCE_KEY_PRIVACY_POLICY_LAST_UPDATE_DATETIME;
    
    
    if (_preferencesService.ContainsKey(applicationPropertyKey))
    
    
    {
    
    
    return;
    
    
    }
    
    
    if (isAgree)
    
    
    {
    
    
    if (_applicationPropertyService.ContainsKey(applicationPropertyKey))
    
    
    {
    
    
    var lastUpdateDate = _applicationPropertyService.GetProperties(applicationPropertyKey).ToString();
    
    
    _preferencesService.SetValue(preferenceKey, lastUpdateDate);
    
    
    }
    
    
    else
    
    
    {
    
    
    _preferencesService.SetValue(preferenceKey, new DateTime().ToString());
    
    
    }
    
    
    }
    
    
    await _applicationPropertyService.Remove(applicationPropertyKey);
    
    
    }
    
    
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_4_0/Covid19Radar/Covid19Radar/Services/Migration/Migrator_1_2_2.cs
    
    https://github.com/cocoa-mhlw/cocoa/blob/release_1_2_5/Covid19Radar/Covid19Radar/Services/TermsUpdateService.cs
    

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58. ͳͥ
    

    0001/01/01 00:00:00 ͕
    

    ͍·ͩʹ࢒͍ͬͯΔͷ͔ʁ
    58
    

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59. v1.2.0Ҏ߱ɺϓϥΠόγʔϙϦγʔͱ
    

    ར༻ن໿͕վగ͞Ε͍ͯΔͷ͔ͩΒɺ
    

    ͦͷ࣌఺ͷ೔෇ʹͳ͍ͬͯΔ͸ͣͰ͸ʁ
    59
    

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60. ར༻ن໿ͷ࠶ಉҙϓϩηε͕࢖ΘΕͨʢදࣔ͞Εͨʣ͜ͱ͕ͳ͍
    60
    {
    
    
    "privacy_policy" : {
    
    
    "text" : "We will retain in the management system the processing numbers required to register people who have tested positive for COVID-19 in COCOA
    to respond to inquiries. We have revised the Privacy Policy due to this. Please confirm the revised content from the link below.",
    
    
    "update_date" : "2021/12/01 13:00:00"
    
    
    }
    
    
    }
    
    
    {
    
    
    "terms_of_service" : {
    
    
    "text": "",
    
    
    "update_date" : ""
    
    
    },
    
    
    "privacy_policy" : {
    
    
    "text" : "We will retain in the management system the processing numbers required to register people who have tested positive for COVID-19 in COCOA
    to respond to inquiries. We have revised the Privacy Policy due to this. Please confirm the revised content from the link below.",
    
    
    "update_date" : "2021/12/01 13:00:00"
    
    
    }
    
    
    }
    
    
    v1.1.5Ͱར༻ن໿ʹ߹ҙ͍ͯͨ͠৔߹ɺ߹ҙ೔࣌͸ߋ৽͞Εͳ͍ʢ0001/01/01 00:00:00ͷ··ʣ
    

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61. ো֐͸ɺͳͥى͖ͨͷ͔
    
    
    ·ͱΊ
    61
    

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62. ՝୊ʹର͢Δೝࣝͷ؁͞ɾ࣮ྗෆ଍
    • λΠϜκʔϯิਖ਼ʢJST͔ΒUTCʣํ๏ͷෆద੾ͳબ୒
    
    • ݴޠʢC#ʣ࢓༷΁ͷཧղ͕ෆे෼ͳ··࣮૷Λͨ͠
    
    • աڈόʔδϣϯͷ࢓༷ͷௐ͕ࠪෆ଍͍ͯͨ͠
    62
    ΞΫγσϯτϨϙʔτʮv1.4.0ϦϦʔεͰൃੜͨ͠ো֐ʹ͍ͭͯʯ #544
    
    https://github.com/cocoa-mhlw/cocoa/pull/544
    

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63. ARIYAMA Keiji - σδλϧிAndroidʢΞϓϦʣΤϯδχΞ / ༗ݶձࣾγʔϦε୅ද
    COCOA 1.4.0 ো֐͸

    ͳͥى͖ͨͷ͔
    ୭͔ͷ͍ͤʹ͍͕ͨ͠
    ࣗ෼ͷإ͔͠ࢥ͍ු͔͹ͳ͍
    63
    

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64. ࠓޙͷରԠ
    • ϚΠάϨʔγϣϯॲཧΛվળ͢Δ

    https://github.com/cocoa-mhlw/cocoa/issues/520
    
    • ΞΫγσϯτϨϙʔτΛॻ͘

    https://github.com/cocoa-mhlw/cocoa/pull/544
    
    • ࠶ൃ๷ࢭࡦͷݕ౼ɾ࣮ࢪ
    64
    

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65. ݕ౼தͷ࠶ൃ๷ࢭࡦ
    ো֐ൃੜ࣌ͷӨڹΛ௿ݮ͢Δํࡦ΋ؚΉ
    • ೔࣌৘ใͷऔΓѻ͍ʹ͍ͭͯఆΊΔ
    
    • ಺෦Ͱ͸UNIX Epochͱͯ͠อଘ͢Δɻ·ͨɺจࣈྻදݱΛRFC 3339ʹ౷
    Ұ͢Δ͜ͱͰϩέʔϧͷҧ͍ʹΑΔڍಈͷҧ͍Λٵऩ͢Δ
    
    • ϢχοτςετΛ੔උ͢ΔɻಛʹίʔυΧόϨοδΛܭଌ͢Δ͜ͱͰɺϢ
    χοτςετ͕ΧόʔͰ͖͍ͯͳ͍ͱ͜ΖΛՄࢹԽ͢Δ
    
    • ϩʔϦϯάΞοϓσʔτʢஈ֊తͳެ։ʣΛ࣮ࢪ͢Δ͜ͱͰɺϦϦʔεΛதࢭ
    Ͱ͖ΔΑ͏ʹ͢Δ
    65
    

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66. ݕ౼தͷ࠶ൃ๷ࢭࡦ
    ো֐ൃੜ࣌ͷӨڹΛ௿ݮ͢Δํࡦ΋ؚΉ
    • ਖ਼ࣜϦϦʔεલʹBeta൛Λ഑෍͢Δ͜ͱͰɺΑΓଟ͘ͷར༻ऀɺ୺຤Ͱςετ
    Ͱ͖ΔΑ͏ʹ͢Δ
    
    • ϦϦʔε༧ఆ೔ɾϦϦʔεঢ়گʢϩʔϦϯάΞοϓσʔτؚΉʣΛɺ͋Β͔͡
    ΊGitHubͳͲͰެද͠ɺެ։࣌ͷ໨ͷ਺Λ૿΍͢͜ͱͰো֐ͷൃੜΛ͍ͪૣ
    ͘ݕग़͢Δ
    
    • ϦϦʔε࣌ظʢϩʔϦϯάΞοϓσʔτؚ࣌Ήʣʹ͸ɺSNSͷ؍ଌΛΦϖϨʔ
    γϣϯͱͯ͠ߦ͏
    66
    

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67. ݕ౼͍ͯ͠ͳ͍࠶ൃ๷ࢭࡦ
    • ίʔυͷऔΓࠐΈʹ౰ͨͬͯ͸ඞͣμϒϧνΣοΫɺՄೳͰ͋Ε͹τϦϓϧ
    νΣοΫΛߦ͏
    67
    

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68. ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠
    68
    

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