Vert.x 3 codegen model uses callback signatures to declare asynchronous operations. Vert.x 4 provides an hybrid model that allows future returning signatures to be used in addition of callbacks.
New modules should switch to a future returning signature to declare asynchronous operations. Codegen modules define the expected signature pattern to be used used, module validation and code generation happen accordingly.
Vert.x 3 codegen model uses callback signatures to declare asynchronous operations. Vert.x 4 provides an hybrid model that allows future returning signatures to be used in addition of callbacks.
New modules should switch to a future returning signature to declare asynchronous operations. Codegen modules define the expected signature pattern to be used used, module validation and code generation happen accordingly.