PaaS Ticketing

Extremely simple PaaS ticketing system used as playground project. Powered by Arcus and lot of copying and pasting from Stack Overflow. The API exposes three endpoints

REST
HAL
GraphQL

Sources and Types

app://ticketing.api

command://order.pay

app://ticketing.services.payment

command://order.deliver
command://order.update

app://ticketing.services.shipping

command://order.update

app://ticketing.services.labeling

event://order.completed

CloudEvent

Messages and commands are propagated as CloudEvent

{
  "specversion": "0.2",
  "type": "command://order.pay",
  "source": "app://ticketing.api",
  "id": "b273a33d-7e03-43e8-9055-d5724240db50",
  "time": "2019-04-15T13:41:45.2478895Z",
  "contenttype": "application/json",
  "data": "{\"attendee\":\"Test user\",\"orderId\":\"29f9a5c5-0d22-4f07-93c3-1e769337755c\",\"token\":\"b9249d\"}"
}

EventGrid

Example of the EventGrid sample

[
  {
    "id": "a367a3a5-270d-4ae3-be30-2118f7d130d8",
    "subject": "/ticketing/orders/12345678",
    "data": {
      "OrderId": "12345678",
      "Recipient": "massimo.crippa@something.com"
    },
    "eventType": "event://order.completed",
    "eventTime": "2019-04-01T20:47:21.3876192Z",
    "dataVersion": "1.0",
    "metadataVersion": "1",
    "topic": "/subscriptions/{sid}/resourceGroups/{rg}/providers/Microsoft.EventGrid/topics/{topicname}"
  }
]

JsonPatch

Content-Type: json-patch+json Path: /core/v1/orders/{oid}

[
	{ 
	"op": "replace", 
	"path": "/status", 
	"value": "Paid" 
	}
]

JWT token (client credentials)

{
  "alg": "RS256",
  "kid": "2d44575830a2a4b16d8e68e7c305ad15",
  "typ": "JWT"
}.{
  "nbf": 1556446005,
  "exp": 1556449605,
  "iss": "http://localhost",
  "aud": [
    "http://localhost/resources",
    "api://ticketing-core"
  ],
  "client_id": "ticketingtestapp",
  "scope": [
    "api://ticketing-core"
  ]
}.[Signature]

NuGet Packages

Microsoft.AspNetCore.TestHost
Microsoft.Azure.ServiceBus
Microsoft.Azure.WebJobs.Extensions.ServiceBus
Microsoft.Azure.WebJobs.Extensions.EventGrid
Microsoft.Azure.WebJobs.Extensions.SendGrid
Microsoft.Azure.WebJobs.Extensions.DurableTask
Microsoft.AspNetCore.JsonPatch
IdentityServer4.AccessTokenValidation
CloudNative.CloudEvents
Microsoft.Azure.Functions.Extensions

E2E correlation

HAL (application/hal+json)

{
  "orderId": "4be6ccc1-c969-408f-812f-2290b649212e",
  "eventId": "97934d7d-7bd2-42fc-977e-4709a7cf08a4",
  "eventName": "Rock Werchter 2019",
  "attendeeId": "431ecfb4-e97a-4539-99b8-9f19cb839cf6",
  "attendee": "user5b8e9b95-048f-471b-ae3f-1c957f815912 Test user",
  "ticketDate": "2019-06-09T14:17:33.4630000Z",
  "status": "Delivered",
  "token": "b-5-41",
  "_links": {
    "self": {
      "href": "/core/v1/orders/links/b-5-41"
    },
    "order": {
      "href": "/core/v1/orders/4be6ccc1-c969-408f-812f-2290b649212e"
    },
    "user": {
      "href": "/core/v1/users/431ecfb4-e97a-4539-99b8-9f19cb839cf6"
    },
    "concert": {
      "href": "/core/v1/concerts/97934d7d-7bd2-42fc-977e-4709a7cf08a4"
    }
  }
}

embedded

{
  "_links": {
    "self": {
      "href": "/core/v1/concerts"
    }
  },
  "_embedded": {
    "concert": [
      {
        "concertId": "97934d7d-7bd2-42fc-977e-4709a7cf08a4",
        "name": "Rock Werchter 2019",
        "price": 150,
        "location": "Brussels",
        "from": "2019-06-27T00:00:00.0000000Z",
        "to": "2019-06-30T00:00:00.0000000Z",
        "_links": {
          "self": {
            "href": "/core/v1/concerts/97934d7d-7bd2-42fc-977e-4709a7cf08a4"
          },
          "concert:users": {
            "href": "/core/v1/concerts/97934d7d-7bd2-42fc-977e-4709a7cf08a4/users"
          }
        }
      },
      {
        "concertId": "8a50838f-7c76-4fd7-b175-562ecb2856e3",
        "name": "Gent Jazz Festival 2019",
        "price": 120,
        "location": "Gent",
        "from": "2019-06-28T00:00:00.0000000Z",
        "to": "2019-07-09T00:00:00.0000000Z",
        "_links": {
          "self": {
            "href": "/core/v1/concerts/8a50838f-7c76-4fd7-b175-562ecb2856e3"
          },
          "concert:users": {
            "href": "/core/v1/concerts/8a50838f-7c76-4fd7-b175-562ecb2856e3/users"
          }
        }
      }
    ]
  }
}

GraphQL

endpoint: /graphql playground: /ui/playground

Simple query (POST)

{
  "operationName": null,
  "variables": {    
  },
  "query": "{\n  users {\n    firstname\n    email\n  }\n}\n"
}

Result

{
  "data": {
    "users": [
      {
        "firstname": "Tom",
        "email": "t.j@test.com"
      },
      {
        "firstname": "user8598edb5-a33b-425b-8725-675c7e9aa9cc",
        "email": "test@user.com"
      }
    ]
  }
}

MassimoC/PaaSTicketing