CODEWITHSUNDEEP
azure-webjobs
Aaron B
Aaron B

Reputation: 1041

Azure WebJobs - add trigger without attribute?

I am building a continuous job that listens for Azure queue messages. Using the documentation I have something like this:

static async Task Main()
{
    var builder = new HostBuilder();
    builder.UseEnvironment("development");
    builder.ConfigureWebJobs(b =>
    {
        b.AddAzureStorageCoreServices();
    });
    var host = builder.Build();
    using (host)
    {
        await host.RunAsync();
    }
}

public static void Run(
    [QueueTrigger("myqueue-items")] string myQueueItem,
    ILogger log)
{
    ...
}

I'm not a fan of the magic QueueTrigger attribute found at runtime. Is it possible to add a trigger function manually? I'm imagining something like:

static async Task Main()
{
    var builder = new HostBuilder();
    builder.UseEnvironment("development");
    builder.ConfigureWebJobs(b =>
    {
        b.AddAzureStorageCoreServices();
        b.AddQueueListener("myqueue-items", Run); // no magic attributes, compiler error if Run function is deleted 
    });
    var host = builder.Build();
    using (host)
    {
        await host.RunAsync();
    }
}

public static void Run(
    string myQueueItem,
    ILogger log)
{
    ...
}

Upvotes: 0

Views: 294

Answers (1)

Carl Zhao
Carl Zhao

Reputation: 9511

Yes, you can use manual triggers, you don’t need to use QueueTrigger attribute, but, as described in the document: To trigger a function manually, use the NoAutomaticTrigger attribute.

Therefore, I think whether you are using Automatic triggers or Manual triggers, you must add a trigger with attributes, which is necessary!

Upvotes: 2

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