1. A computer-implemented method for modification of program code for execution in a multi-tenant execution environment, the method comprising: receiving program code configured for execution in a single-tenant execution environment; receiving instructions for modifying the program code for execution in the single-tenant execution environment into a modified application for execution in a multi-tenant application container environment; and utilizing the instructions to configure the program code for execution in an instance of the multi-tenant application container, the multi-tenant application container configured to execute one or more applications for one or more tenants, wherein utilizing the instructions to configure the program code for execution in the multi-tenant application container comprises modifying the program code to provide a per-tenant resource that appears to the program code to be a global resource defined by the program code, the per-tenant resource comprising an application identifier and the global resource comprising a process identifier.