Embedding of multiple versions in monolithic applications during compilation

A method of updating a monolithic application, the method comprising,

• receiving a new version of the monolithic application that includes a first set of computer readable instructions;
• creating, with an electronic processor, a new class that defines a previous version of the monolithic application that includes a second set of computer readable instructions;
• during compilation of the monolithic application into an executable file, combining the new class with the new version of the monolithic application and establishing, with the electronic processor, version flow using computer readable instructions included in the new class;
• and
• determining which computer executable instructions in the executable file to execute at runtime.

A non-transitory, computer-readable medium storing instructions that, when executed by an electronic processor, perform a set of functions, the set of functions comprising:

• receiving a new version of a monolithic application that includes a first set of computer readable instructions;
• creating a new class that defines a previous version of the monolithic application, the previous version of the monolithic application including a second set of computer readable instructions;
• compiling the monolithic application to combine the new version of the monolithic application and the new class into an executable file;
• receiving a selection of a version of the monolithic application to execute;
• and
• executing computer executable instructions in the executable file corresponding to the received selection of a version of the monolithic application.