Event Driven Solutions

Question 1

Events

What are the Event Types?

Answer 1

(1) Event Grid
(2) Event Hub
(3) Notification Hub

Event Grid - Descrete: Report changes and are actionable
Event Hub - Series: Report a condition, time-ordered, and analyzable
Notification Hub - User Notification: Promp user or their device for attention

Question 2

Event Grid

What is the Event Grid?

Answer 2

(1) Serverless proposition
(2) Publisher emit and subscribers consume
(Azure or Custom)
(3) Supports many subscribes to one publisher
(4) Filter Events
(5) Scalable up and down to 0
(6) Pay for what you use

Question 3

Event Grid

Create an Event Grid Steps

Answer 3

(1) Create resource group
(2) Provider Registration
(3) Check registration status
(4) Create a custom topic
(5) Create a message endpoint

Question 4

Event Grid

What are the Pub/Sub Concepts?

Answer 4

(1) Event signifies something has changed
(2) Publisher HAS NO expectation of what happens with event
(3) Subscribers determines what to do with event

Question 5

Event Grid

What are the main Event Grid Terminology?

Answer 5

(1) Events
(2) Publishers
(3) Topics
(4) Subscriptions
(5) Handlers

Question 6

Event Grid

Name some examples of Event Publishers

Answer 6

(1) App Configuration
(2) App Service
(3) Blob Storage
(4) Communication Services
(5) Container Registry
(6) Event Hubs
(7) IoT Hub
(8) Keyvault

Question 7

Event Grid

What are Custom Topics?

Answer 7

(1) User defined
(2) Same message schema as Azure Topics
(3) Can send custom info with message

Question 8

Event Grid

Some examples of Event Handlers for Event Grids

Answer 8

(1) Azure Functions
(2) Event Hubs
(3) Service Bus
(4) Storage Queues
(5) Web Hooks

Question 9

Event Grid

Overview of Event Grids

Answer 9

Event-based architecture (Pub/Sub)
Event Grid can filter, support many subscribers and highly scalable
Pay for what you use
Many built-in Azure services supported
Can also create custom event and topics

Question 10

Event Hub

What are the Event Hub Fundelmentals?

Answer 10

(1) Scalable event processing service
(2) Big data scenarios
(3) Millions of events/second
(4) Decouples sending and receiving data
(5) Integrates with Azure and Non-Azure services
(6) Captures events to Azure Blob or Data Lake

Question 11

Event Hub

What types of scenarios would Event Hub be used?

Answer 11

(1) Telemetry
(2) Data archival
(3) Transaction processing
(4) Anomaly detection

Question 12

Event Hub

Container for Event Hubs has

Answer 12

(1) Scoping container
(2) Contains one or more Event Hubs
(3) Options apply to all
(4) Throughput units

Question 13

Event Hub

Components for Event Hubs

Answer 13

(1) Namespace
(2) Event Producers
(3) Partitions (Bucket of messages, more than one partition per Event Hub)
(4) Consumer Groups (view of Event Hub)
(5) Consumers (application that reads events)

Question 14

Event Hub

Event Hub Creation using CLI

Answer 14

Part 1
az eventhubs namespace –resource-group $rgname –location $loc –name $ns –sku [Standard, Basic]

Part 2
az eventhubs eventhub create –name $eventhubname –namespace $ns –message-retention 3 –partition-count 4 –resource-group $rgname

Namespace must be created before
Message retention 1 - 7 days (default?)
Partition count 2 - 32
Compare Standard and Basic skus for Event Hubs

Question 15

Event Hub

Steps to set up to Send Events to Event Hub (C#)

Answer 15

(1) Install .NET SDK
(2) Obtain connection info
(3) Open Connection
(4) Prepare data
(5) Send data

Question 16

Event Hub

Charateristics of Partitions

Answer 16

(1) Like a bucket for messages
(2) Holds event time-ordered as they arrive
(3) Events are not deleted once read
(4) Event Hubs decides with partition events are sent to
(can specify partition with partition key)
(5) Maximum 32 partitions
(6) Create as many as expected concurrent subscribers

Question 17

Event Hub

Steps to read events from Event Hub

Answer 17

(1) Install .NET SDK
(2) Obtain connection info
(3) Open connection
(4) Retrieve data
(5) Decode data

Question 18

Notification Hubs

Azure Notification Hub Fundelmentals

Answer 18

(1) Send push notifications
(2) Send to multiple platforms
(3) ANH providers abstraction over plantform notification services

Question 19

Notification Hubs

Features of Notification Hubs

Answer 19

(1) Cross-platform
(2) Multiple deliver formats
(3) Telemetry
(4) Scalable

Multiple delivery formats include push to user, push to device, locationation, and slient push

Question 20

Notification Hubs

Components of the Notification Service

Answer 20

(1) Platform Notification Service (PNS)
* (Vendor Specific)*
(2) Notification Hub
* (Communicates to PNS)*
(3) Notification Hub Namespace
* (Regional collection of hubs)*

Question 21

Notification Hubs

Overview of Notification Hubs

Answer 21

(1) Namespace is a collection of Notification Hubs
(2) Usually one namespace per application
(3) One hub per application environment
(4) Credentials at Namespace level
(5) Billing at namespace level

Question 22

Notification Hubs

Sending Notifications Workflow

Answer 22

(1) Setup PNS’s
(2) Setup ANH
(namespace and hub)
(3) Map PNS to ANH
(apply keys from PNS)
(4) Register devices
(Use .NET SDK Web API Backend)
(5) Send Pushes
* (.NET SDK via web API Targeted, silent, broadcast, etc)*