entity-component-system | Entity Component System pattern | Game Engine library

I have seen lots of information on storing functions in variables for execution, but the functions shown are always of the:

I have problem with typescript typings.

Currently, I am working on small game engine, which uses entity-component-system model. I want to "serialize" types of interface into the array of classes (a types of each interface property) to inform system about needed components.

What I want to achieve ideally:

I am working on making a very simple 2D game engine, and I am in the process of redoing my entities to work somewhat like Unity's system. I have been doing research on how the Entity-Component-System design pattern (ECS) works, and I am beginning to understand it better.

As I understand, a component in ECS only holds data and is not capable of doing anything but retain that data. These components are then used by systems which are used to read and manipulate their data.

This led me to question is if the MonoBehaviour scripts that are attached to a GameObject in Unity are technically systems and not components as they are called in the Unity editor?

If I am mistaken, I think it would be helpful for me to analyze true implementations of ECS. I am coding in Java, so if anyone has any examples of an ECS system implemented in Java or C#, that would be great as most of the examples I have seen were in C++ which is a bit more difficult for me to understand.
Thanks!

Using the Entity-Component-System pattern I want to connect some systems with events. So some systems shouldn't run in a loop, they should just run on demand.

Given the example of a Health system a Death system should only run when a component gets below 1 health.

I thought about having two types of systems. The first type is a periodic system. This runs once per frame, for example a Render or Movement System. The other type is an event based system. As mentioned before a connection between Health and Death.

First I created a basic interface used by both system types.

I'm setting up a really small Entity-Component-System example and have some problems with the component pools.

Currently my entities are just IDs (GUIDs) which is fine.

Each system has to implement the ISystem interface

I want to create an Entity-Component-System example. I have components like

I want to create a small Entity-Component-System example and created some components like

I'm making an Entity-Component-System Engine and I have a little trouble with prefabs. I want to copy a prefab, only if the class that the user pass has template is copy constructible. A simple implementation of what I want to do will be something like that :

I am trying to build a simple iOS game using entity-component architecture similar to what is described here.

What I would like to achieve in my game is when a user touches the screen, detect where the touch occurred and move all entities of one type towards a specific direction (direction depends on where the user touched, right of screen = up, left of screen = down).

So far, the game is really simple and I am only getting started, but I am stuck in this simple functionality:

My issue is that an SKAction is supposed to run on all entities of a type, but happens at all.

Before I redesigned my game to an ECS approach, this worked fine.

Here is the GKEntity subclass that I declared in Lines.swift: