WebJobs and DI

AutofacActivator.cs

using Autofac;
using Microsoft.Azure.WebJobs.Host;

namespace WebJob1
{
    public class AutofacActivator : IJobActivator
    {
        private readonly IContainer _container;

        public AutofacActivator(IContainer container)
        {
            _container = container;
        }

        public T CreateInstance<T>()
        {
            return _container.Resolve<T>();
        }
    }
}

Functions.cs

using System.IO;
using Microsoft.Azure.WebJobs;
using WebJob1.Implementations;

namespace WebJob1
{
    public class Functions
    {
        private readonly IStringGenerator _stringGenerator;

        public Functions(IStringGenerator strGenerator)
        {
            // The Job Activator will inject the Concrete type (defined in the container) into this class
            _stringGenerator = strGenerator;
        }

        // This function will get triggered/executed when a new message is written 
        // on an Azure Queue called queue.
        public void ProcessQueueMessage([QueueTrigger("queue")] string message, TextWriter log)
        {
            log.WriteLine(message);

            // This will print out "Hello" to our Azure WebJob log
            log.WriteLine(_stringGenerator.GetWord());
        }
    }
}

Program.cs

using Microsoft.Azure.WebJobs;

namespace WebJob1
{
    class Program
    {
        // Please set the following connection strings in app.config for this WebJob to run:
        // AzureWebJobsDashboard and AzureWebJobsStorage
        static void Main()
        {
            var config = new JobHostConfiguration
            {
                JobActivator = new AutofacActivator(ContainerConfig.GetContainer())
            };
            var host = new JobHost(config);
            // The following code ensures that the WebJob will be running continuously
            host.RunAndBlock();
        }
    }
}