Abstract: Described are techniques for executing an application. The application includes a plurality of partitions including business logic and one or more aspects. A first registration interface of an application programming interface is defined for registering a code entity and associated input and output parameters. A provider of a first aspect of the application is registered using the first registration interface to define the provider as a callback invoked from other code of the application programming interface that performs aspect weaving. The provider includes a first code entity and a first data entity of the first aspect. A second code entity of the business logic is executed that performs a call to the other code performing aspect weaving to obtain a second data entity of the business logic. The other code performing aspect weaving is executed and performs a callback to the provider of the first aspect.