Timer Trigger

Runs a function on a schedule using CRON expressions.

Example (JavaScript)

module.exports = async function (context, myTimer) {
    var timeStamp = new Date().toISOString();
    context.log('Timer trigger function ran at', timeStamp);
};

function.json

{
  "bindings": [
    {
      "name": "myTimer",
      "type": "timerTrigger",
      "direction": "in",
      "schedule": "0 */5 * * * *"
    }
  ]
}

Blob Storage Trigger

Invoked when a new or updated blob is detected in a storage container.

Example (Python)

import logging
import azure.functions as func

def main(blob: func.InputStream):
    logging.info(f"Blob trigger processed blob\n"
                 f"Name: {blob.name}\n"
                 f"Size: {blob.length} bytes")

function.json

{
  "bindings": [
    {
      "name": "blob",
      "type": "blobTrigger",
      "direction": "in",
      "path": "samples-workitems/{name}",
      "connection": "AzureWebJobsStorage"
    }
  ]
}

Queue Storage Trigger

Runs when a new message appears in an Azure Storage queue.

Example (C#)

using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;

public static class QueueExample
{
    [FunctionName("QueueExample")]
    public static void Run(
        [QueueTrigger("myqueue-items", Connection = "AzureWebJobsStorage")] string myQueueItem,
        ILogger log)
    {
        log.LogInformation($"C# Queue trigger function processed: {myQueueItem}");
    }
}

Cosmos DB Trigger

Triggers when documents are created or updated in a Cosmos DB container.

Example (JavaScript)

module.exports = async function (context, documents) {
    if (!!documents && documents.length > 0) {
        context.log('Document Id:', documents[0].id);
    }
};

function.json

{
  "bindings": [
    {
      "type": "cosmosDBTrigger",
      "name": "documents",
      "direction": "in",
      "leaseCollectionName": "leases",
      "connectionStringSetting": "CosmosDBConnection",
      "databaseName": "mydb",
      "collectionName": "mycoll"
    }
  ]
}

Event Grid Trigger

Invoked by Event Grid events such as resource creation, deletion, or custom events.

Example (C#)

using Microsoft.Azure.WebJobs;
using Microsoft.Azure.EventGrid.Models;
using Microsoft.Extensions.Logging;

public static class EventGridExample
{
    [FunctionName("EventGridExample")]
    public static void Run(
        [EventGridTrigger] EventGridEvent eventGridEvent,
        ILogger log)
    {
        log.LogInformation($"Event Grid trigger received: {eventGridEvent.EventType}");
    }
}

Event Hub Trigger

Processes events arriving in an Azure Event Hub.

Example (Java)

public class EventHubTriggerFunction {
    @FunctionName("EventHubProcessor")
    public void run(
        @EventHubTrigger(name = "msg", 
                         eventHubName = "myhub", 
                         connection = "EventHubConnection") String[] messages,
        final ExecutionContext context) {
        for (String message : messages) {
            context.getLogger().info("Event Hub message: " + message);
        }
    }
}

Service Bus Trigger

Triggered when a message arrives on a Service Bus queue or subscription.

Example (JavaScript)

module.exports = async function (context, mySbMsg) {
    context.log('Service Bus queue trigger processed message', mySbMsg);
};

function.json

{
  "bindings": [
    {
      "type": "serviceBusTrigger",
      "name": "mySbMsg",
      "direction": "in",
      "queueName": "myqueue",
      "connection": "ServiceBusConnection"
    }
  ]
}