Designing Platform Independent Mobile Apps and Services

251 Pages·2016·5.36 MB·English

by  Rocky Heckman

DESIGNING PLATFORM
INDEPENDENT MOBILE
APPS AND SERVICES
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DESIGNING PLATFORM
INDEPENDENT MOBILE
APPS AND SERVICES
ROCKY HECKMAN
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Names:Heckman,Rocky,author.
Title:Designingplatformindependentmobileappsandservices/Rocky
Heckman.
Description:Hoboken,NewJersey:JohnWiley&Sons,Inc.,[2016]|Includes
index.
Identifiers:LCCN2016009419|ISBN9781119060147(cloth)|ISBN9781119060185
(epub)|ISBN9781119060154(AdobePDF)
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Thankyoutoallmyfriends whofinallyconvincedmetowriteabook.
Mostofall,thankyoutomywifeStefanie,andmytwobeautiful girls
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withallthetimeIspentdoingit.Iloveyouallverymuch.
LookDad,Ididit!

TABLE OF CONTENTS
LISTOFFIGURES xi
LISTOFTABLES xiii
PREFACE xv
ACKNOWLEDGMENTS xvii
CHAPTER1 THEMOBILELANDSCAPE 1
1.1 Introduction 1
1.2 PreviousAttemptsatCross-Platform 2
1.2.1 Java 2
1.2.2 EarlyWebApps 5
1.2.3 MultipleCodebases 7
1.3 BreadthVersusDepth 9
1.4 TheMulti-PlatformTargets 10
1.4.1 Traditional 10
1.4.2 Mobile 11
1.4.3 Wearables 12
1.4.4 Embedded 13
CHAPTER2 PLATFORM-INDEPENDENTDEVELOPMENTTECHNOLOGIES 15
TheGoldenRule 15
2.1 VendorLock-In 16
2.2 RecommendedStandardsandGuidelines 18
2.2.1 RespectingtheDevice 18
2.2.2 RespectingtheNetwork 19
2.2.3 CommunicationProtocols 21
2.2.4 DataFormats 31
2.2.5 MobileUserExperienceGuidelines 40
2.2.6 Authentication 45
2.2.7 DealingwithOfflineandPartiallyConnectedDevices 47
2.3 WrappingUp 63
CHAPTER3 PLATFORM-INDEPENDENTDEVELOPMENTSTRATEGY 64
3.1 High-LevelAppDevelopmentFlow 64
3.2 Five-LayerArchitecture 65
3.3 Five-LayerArchitectureDetail 66
3.3.1 TheUserInterfaceLayer 66
3.3.2 TheServiceInterfaceLayer 68
vii
viii CONTENTS
3.3.3 TheServiceLayer 69
3.3.4 TheDataAbstractionLayer 70
3.3.5 TheDataLayer 70
CHAPTER4 THEUSERINTERFACELAYER 72
4.1 PortingVersusWrapping 72
4.2 Multi-ClientDevelopmentTools 73
4.2.1 PhoneGap(http://phonegap.com/) 73
4.2.2 Xamarin(http://xamarin.com/) 74
4.2.3 Unity(http://www.unity3d.com) 75
4.2.4 VisualStudio 76
4.3 Cross-PlatformLanguages 76
4.4 AvoidWritingfortheLeastCommonDenominator 77
4.5 WrappingUp 78
CHAPTER5 THESERVICEINTERFACELAYER 79
5.1 MessageProcessing 79
5.1.1 PushversusPull 80
5.1.2 PartiallyConnectedScenarios 81
5.2 MessageProcessingPatterns 82
5.3 High-VolumeMessagingPatterns 85
5.3.1 QueueServicesandMicrosoftAzureEventHubs 86
5.3.2 WebSockets 89
5.4 High-VolumePushNotifications 91
5.4.1 ThirdPartyNotificationHubs 93
5.5 MessageTranslationandRouting 97
5.5.1 MessageTranslation 97
5.5.2 MessageRouting 103
5.5.3 HandlingLargeAmountsofData 108
5.6 WrappingUp 111
CHAPTER6 THESERVICELAYER 114
6.1 ThinkinginNodes 114
6.1.1 ScaleOutandScaleUp 114
6.1.2 ScaleOutversusScaleUp 114
6.2 PlanningforHorizontalScaling 117
6.2.1 NodeSizing 117
6.2.2 Statelessness 120
6.3 DesigningServiceLayersforMobileComputing 121
6.3.1 ServiceComponentization 122
6.4 ImplementationAbstraction 124
6.4.1 ServiceInterfaceAbstraction 124
6.5 UsingCQRS/ESforServiceImplementation 127
6.5.1 CQRSOverview 127
6.5.2 WhyCQRS 129
6.5.3 BeingAbletoSeparateDataModels 129
6.5.4 AggregatesandBoundedContexts 131