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You have seen the main ideas of Covalent: components, services, events, parameters, lifecycle, segmentation, composition, and integration of existing objects. Here are pointers to go further.

Observe Your Application With The Component Viewer

A running Covalent container can be inspected. The component viewer is an optional extension, provided by the covalent-supervision module, that lets you look at the components of a container. Enable it by adding that module to the classpath and setting the following system property:

-Dcovalent.extensions=component-viewer

The viewer opens on demand: press Ctrl+Shift+F12 in a window of your application, or see Summoning the Supervisor for the other ways.

When Something Goes Wrong

The troubleshooting page lists common symptoms (validation errors, proxy errors, lifecycle failures, circular dependencies, asynchronous failures) and the first checks to make.

Where To Read More

If you want to…	Read
understand the ideas behind the model (DIP, DI, IoC)	Foundations
know every option of managed components	Managed Components Guide
adopt Covalent progressively	Raw Components Guide
see full applications built on Covalent	Examples Guide
build a JavaFX UI on top of Covalent components	HMI Guide
find the documentation index	User Guide

Exercises

• Add a Bakery component that consumes OrderEvents and only wants croissant orders, using a filter (step 6).
• Register a second existing object as a raw component and let a managed component use both (step 8).
• Read the tax rate of step 4 back from a second component, using the getter of the same parameters interface (step 4).

Home | Previous: Step 8: Existing Objects | Next: Covalent User Guide