Consume a few Azure Queue storages using the same consumer Azure Function App

Question

Hello all,

I am using an Azure Function App implemented in Java 8. The function uses Azure Queue as input binding.
Is it possible to set one function as a trigger for a few queues of Azure Queue storage?
If not, do you know a "clean" workaround to achieve it?

By default, the @QueueTrigger looks like:

   package com.function;  
   import com.microsoft.azure.functions.annotation.*;  
   import java.util.Queue;  
   import com.microsoft.azure.functions.*;  
     
   public class QueueTriggerDemo {  
       @FunctionName("QueueTriggerDemo")  
       public void run(  
           @QueueTrigger(name = "message", queueName = "messages", connection = "MyStorageConnectionAppSetting") String message,  
           final ExecutionContext context  
       ) {  
           context.getLogger().info("Queue message: " + message);  
       }  
   }  

The following code was copied from: https://learn.microsoft.com/en-us/azure/azure-functions/functions-bindings-storage-queue-trigger?tabs=java#attributes-and-annotations

Answer 1

Functions are only allowed one trigger each, but by organizing your logic into a separate method you could set up multiple functions that call that logic more easily. While not recommended generally, you can also define more than one function per class, and this might be somewhere you would want to bend that rule a bit.

It would look something like this:

 public class QueueTrigger {

     DoStuff() {
         //stuff
     }

     @Function
     QueueTriggerOne() {
         DoStuff()
     }

     @Function
     QueueTriggerTwo() {
         DoStuff()
     }

     @Function
     QueueTriggerThree() {
         DoStuff()
     }

     //etc

 }