Logic App

• Build your own workflows
• It's an Low Code alternative to Function Apps
• Uses the Logic App Designer to define the workflow
• A Trigger can be defined which perform some steps and actions
• Actions can take place in external system using the connectors
• Standard (app service) or Consumption (serverless)
• https://docs.microsoft.com/en-us/azure/connectors/apis-list

Workflow examples

• Whenever an administrative action is performed on a VM, mail an administrator and trigger a function app
• Automatically change the blob tier based on last modified time
• Recurrence on daily basis
• Set the tier age variable
• Get list of Blobs in container
• Scan all the blobs in the container
  • Set an action if the condition is true
  • Set an action if the condition is false
• Telemetry
• Create a blank logic app
• Add a trigger to the logic app which will fire when one or more messages arrives in the queue
• Create an action to read the IoT temperature data.
• Set a condition that compares the temperature against the upper and lower thresholds.
• Create an action that sends an email to the specified personnel.

Logic App Designer

• Each trigger created in Logic App Designer is created as a separate API Connection resource

• Common Triggers

• Service Bus Queue

• HTTP Requests
• Tweet
• Event Grid event
• Recurrence
• Email on outlook
• New file on onedrive
• File added to FTP server

JSON configuration

• The Logic app designer generates a json configuration behind the scenes

{
  "external-api": {
    "type": "Http",
    "inputs": {
      "method": "POST",
      "uri": "https://www.example-api.com/api",
      "retryPolicy": {
        "type": "fixed",
        "interval": "PT10S", // retry connection every 10 seconds
        "count": "5" // try 5 times
      }
    }
  }
}

Integration

• Use Enterprise Integration Pack to edit B2B workflows
• Use On-premise Data Gateway to allow Logic App to access on-premise data resources
• Use Integration Service Environment to secure your connection with the logic app, this environment is injected into your Azure VNet

Debugging

• To debug a logic app you can follow the Logic App run history