I want to create diagram which shows different relations between components.
Something like this example:
Is there similar example or I hate to create custom component?
I am not aware of an open source / free diagramming library for JavaFX (and I couldn't find one using google and the like). However, if you are willing to invest, there is a commercial JavaFX library for diagramming / graph visualization called yFiles for JavaFX. You can try the online demo browser on their homepage.