I am having a java app which I am planning to migrate to Pivotal Cloud Foundry. The application uses JMX to change of the properties at runtime. Is it possible to retain the same architecture when I migrate the app to PCF or should I explore a different approach?
For a PCF app, the cloud environment should provide dependencies needed for your app. You can inject these dependencies for runtime in various ways, for instance, provide environment settings.
If you need say credentials at runtime, you can look at Spring Cloud Services, and the Config server. If you are looking for other services, you can use Service registry and discovery (based on Netflix Eureka component) within Spring Cloud Services.
It all depends on your use case. Can you elaborate more on "change properties at runtime"?