Have a look at this article https://creativewebspecialist.co.uk/2018/06/15/umbraco-v8-bye-bye-applicationeventhandler-hello-umbraco-components/

Hi Travis,

Thanks for your quick response. I'm not able to refer the Umbraco.Core.Components as using statements. It says that there are no type or namespace Components under Umbraco.Core.

I've tried to restore my nugget packages but I'm still not able to use the Umbraco.Core.Components as a statement. I can access the Umbraco.Core, but not the Components. Am I missing something?

I've tried to create a whole new project and I'm still not able to access that statement.

My project is working correctly, the only thing that I can't do is create that component, since I'm not able to use the Umbraco.Core.Components statement.

Hi Carlos,

The namespace to create components is this:

using Umbraco.Core.Composing;

small example

    using Umbraco.Core;
    using Umbraco.Core.Composing;

    namespace UmbracoV8.Core
    {

        public class SomeComposer : IUserComposer
        {
            public void Compose(Composition composition)
            {

                composition.Components().Append<MyComponent>();
            }
        }

        public class MyComponent : IComponent
        {

            public void Initialize()
            {
                //stuff

            }

            public void Terminate()
            {
                //throw new System.NotImplementedException();
            }
        }
    }

public class PublishEventsComposer : ComponentComposer
{
}

public class PublishEventsComponent : IComponent
{
    private readonly IUserService _userService;
    private readonly ILogger _logger;

    public PublishEventsComponent(IUserService userService, ILogger logger)
    {
        _userService = userService;
        _logger = logger;
    }

    public void Initialize()
    {
        ContentService.Published += (contentService, e) =>
        {
            foreach (IContent ic in e.PublishedEntities)
                if (_userService.GetUserById(ic.WriterId) is IUser author)
                    _logger.Info<PublishEventsComponent>(
                        $"Content '{ic.Name}' was published by '{author.Name}'");
        };
    }

    public void Terminate()
    {
    }
}

I believe that some namespace used in old examples have been changed

https://www.perplex.nl/en/blog/2019/umbraco-v8-changes-for-developers/

this article can help

Hi Marcio,

Thanks for your help. However, I'm still not able to implement that.

public class PublishEventsComposer : ComponentComposer

public class PublishEventsComponent : IComponent
{
    private readonly IUserService _userService;
    private readonly ILogger _logger;

    public PublishEventsComponent(IUserService userService, ILogger logger)
    {
        _userService = userService;
        _logger = logger;
    }

    public void Initialize()
    {
        ContentService.Published += (contentService, e) =>
        {
            foreach (IContent ic in e.PublishedEntities)
                if (_userService.GetUserById(ic.WriterId) is IUser author)
                    _logger.Info<PublishEventsComponent>("this was saved");
        };
    }

    public void Terminate()
    {
    }
}

I don't have errors on my code but the event is not being fired when I publish a node, nor it passes by this method.

I'm also appending my Component on the Compose method

It's working now.

I was using a different interface to inherit for my Composer. It should be: PublishEventsComposer : IUserComposer.

Thanks for all your help on this

is working on a reply...