Async

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#ServerlessApplications E V EN T M A N A G E M E N T @JONATHANFMILLS

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To the cloud ToThe Cloud!

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Dilbert

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GraphQL Event ManagerFunctions

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GraphQL Event Manager Functions

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What does ittake to add a user?

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POST: Add User

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POST: Add UserAdd User Message

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POST: Add User Audit Permissions ADIntegration Add User Message

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POST: Add User Audit Permissions ADIntegration Add User Message

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Event Manager

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Service Bus

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Event Hub

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Event Grid

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Event Grid EventHub Service Bus What do we use?

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VS Event Message

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An event isa lightweight notiﬁcation of a condition or a state change.

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The publisher ofthe event has no expectation about how the event is handled.

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The consumer ofthe event decides what to do with the notiﬁcation.

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Discrete Series

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Discrete events reportstate change and are actionable. To take the next step, the consumer only needs to know that something happened.

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The event datahas information about what happened but doesn't have the data that triggered the event.

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Discrete Series

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Series events reporta condition and are analyzable. The events are time-ordered and interrelated.

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The consumer needsthe sequenced series of events to analyze what happened.

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VS Event Message

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A message israw data produced by a service to be consumed or stored elsewhere. The message contains the data that triggered the message pipeline.

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The publisher ofthe message has an expectation about how the consumer handles the message. A contract exists between the two sides.

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I need aresponse…

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Event Grid usea publish-subscribe model to handle events.

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Publishers emit events,but have no expectation about which events are handled.

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Subscribers decide whichevents they want to handle.

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Event Grid routesevents from both Azure and non-Azure resources.

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Event Grid isn'ta data pipeline, and doesn't deliver the actual object that was updated!!!

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VS Event Message

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Event Grid supportsdead-lettering for events that aren't delivered to an endpoint.

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Dead Lettering?

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Dead Lettering? Message thatis sent to a queue that does not exist Message length limit exceeded. Message length limit exceeded. Message is rejected by another queue exchange. Message reaches a threshold read counter number Queue length limit exceeded.

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dynamically scalable serverless low cost at least once delivery

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Azure Event Hubsfacilitates the capture, retention, and replay of telemetry and event stream data. The data can come from many concurrent sources.

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Azure Event Hubsfacilitates the capture, retention, and replay of telemetry and event stream data. The data can come from many concurrent sources.

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Event Hubs allowstelemetry and event data to be made available to a variety of stream-processing infrastructures and analytics services.

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It is availableeither as data streams or bundled event batches.

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A single solutionthat enables rapid data retrieval for real- time processing as well as repeated replay of stored raw data.

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A single solutionthat enables rapid data retrieval for real- time processing as well as repeated replay of stored raw data.

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It can capturethe streaming data into a ﬁle for processing and analysis.

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low latency at leastonce delivery millions of events per second

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Service Bus isintended for traditional enterprise applications.

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These enterprise applicationsrequire transactions, ordering, duplicate detection, and instantaneous consistency.

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Service Bus canconnect existing on-premises systems to cloud solutions.

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Works as QueueOR Subscription

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How those playwith real examples

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Functions

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On Demand

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No InfrastructureOn Demand

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Code in responseto eventsNo InfrastructureOn Demand

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On Demand Codein response to eventsNo InfrastructureOn Demand

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What Events?

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a HTTP Event CosmosDB BlobStorageStorage Queue

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Event Grid EventHub Service Bus

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Function is alittle misnomer. Think of it as an app. Durable Functions are possible now

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GraphQL

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GraphQL

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GraphQL

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GraphQL

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GraphQL

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{ "firstName": "Jon", "lastName": "Mills", "dob":"1/1/1999", "title": "Consultant" }

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{ "_id": "5d73b3ae9aeb47e81242100a", "index": 0, "guid":"c3d8d460-bc6f-4956-9f89-d499f68b7128", "name": “Jonathan Mills", "gender": "male", "company": "BUNGA", "isActive": false, "picture": "http://placehold.it/32x32", "age": 38, "eyeColor": "blue", "email": “jonathandfmills@gmail.com“, "phone": "+1 (876) 546-3397", "address": "820 Hendrix Street, Bladensburg, Pennsylvania, 2902", "about": "Voluptate reprehenderit ullamco in ad labore eiusmod officia ut. Sint proident excepteur occaecat aliquip dolor tempor in. Do quis esse aute nostrud proident deserunt proident commodo minim nulla qui et.rn", "registered": "2018-03-17T10:36:24 +05:00", "latitude": -34.569843, "longitude": -70.319078, "tags": [ "Lorem", "amet", "in", "officia", "minim", "nulla", "veniam" ], "friends": [ { "id": 0, "name": "Robles Buckley" }, {

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"email": “jonathandfmills@gmail.com“, "phone": "+1(876) 546-3397", "address": "820 Hendrix Street, Bladensburg, Pennsylvania, 2902", "about": "Voluptate reprehenderit ullamco in ad labore eiusmod officia ut. Sint proident excepteur occaecat aliquip dolor tempor in. Do quis esse aute nostrud proident deserunt proident commodo minim nulla qui et.rn", "registered": "2018-03-17T10:36:24 +05:00", "latitude": -34.569843, "longitude": -70.319078, "tags": [ "Lorem", "amet", "in", "officia", "minim", "nulla", "veniam" ], "friends": [ { "id": 0, "name": "Robles Buckley" }, { "id": 1, "name": "Kirk Ashley" }, { "id": 2, "name": "Tameka Kelley" } ], "greeting": "Hello, Mandy Watts! You have 1 unread messages.", "favoriteFruit": "strawberry" }

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GraphQL is aquery language for your api

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gql` query PeopleQuery { People{ firstName lastName dob Title } } `;

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gql` query PeopleQuery { People{ firstName lastName dob Title } } `;

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gql` query PeopleQuery { People{ firstName lastName dob title age } } `;

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{ "firstName": "Jon", "lastName": "Mills", "dob":"1/1/1999", "title": "Consultant", "age": "38" }

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GraphQL Subscriptions allowreal time updates

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gql` subscription personAdded($personId: ID!){ personAdded(personId: $personId) { completionMessage } }

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