Fine tuning application behavior using application zones
Managing an application zone is provided. A request is received from a program on a client device to enter a zone of an application that provides a service. In response to determining that the zone does not currently exist in the application, the zone is generated in the application based on defined parameters of the zone. An enter notification is sent to the program on the client device indicating that the zone is ready for the program to enter to receive the service.
1. A computer-implemented method for managing an application, the computer-implemented method comprising:
receiving, by a computer, a request from a program on a client device to enter a zone that provides a service, the zone being in an application;
responsive to the computer determining that the zone does not currently exist in the application, generating, by the computer, the zone based on defined parameters of the zone; and
sending, by the computer, an enter notification to the program on the client device indicating that the zone is ready for the program to enter to receive the service.
2. The computer-implemented method of claim 1 , wherein the zone guarantees availability of dedicated resources to the program.
3. The computer-implemented method of claim 2 further comprising:
spawning, by the computer, a zone monitoring thread to enforce a set of rules on the zone.
4. The computer-implemented method of claim 3 , wherein one of the set of rules is to disallow I/O writes.
5. The computer-implemented method of claim 3 , wherein one of the set of rules is to disallow remote connection.
6. The computer-implemented method of claim 3 , wherein one of the set of rules is to terminate a program in response to determining that the program is running.
7. The computer-implemented method of claim 2 further comprising:
retrieving, by the computer, a set of rules corresponding to the zone from a storage device; and
defining, by the computer, parameters of the zone based on the set of rules corresponding to the zone.
8. The computer-implemented method of claim 2 further comprising:
receiving, by the computer, an indication from a zone monitoring thread that the program has entered the zone.
9. The computer-implemented method of claim 2 further comprising:
receiving, by the computer, an exit notification from the program on the client device indicating that the program has exited the zone;
responsive to the computer determining that the program is a last program to exit the zone, releasing, by the computer, resources dedicated to the zone; and
instructing, by the computer, a zone monitoring thread to stop enforcing a set of rules on the zone.
10. The computer-implemented method of claim 2 further comprising:
responsive to the computer determining that a number of programs currently in the zone is greater than a threshold number of programs defined for the zone by a set of rules, blocking, by the computer, the program from entering the zone.
11. The computer-implemented method of claim 10 further comprising:
determining, by the computer, whether the number of programs in the zone has decreased to less than the threshold number of programs;
responsive to the computer determining that the number of programs in the zone has decreased to less than the threshold number of programs, sending, by the computer, the enter notification to the program;
responsive to the computer determining that the number of programs in the zone has not decreased to less than the threshold number of programs, determining, by the computer, whether a timeout timer expired; and
responsive to the computer determining that the timeout timer has expired, sending, by the computer, an entry failure notification to the program requesting entrance into the zone.
12. The computer-implemented method of claim 2 , wherein the computer utilizes a zone manager to manage the zone, and wherein the zone manager is included in an operating system of the computer.
13. The computer-implemented method of claim 2 , wherein the zone includes a label, and wherein the program knows the label of the zone, and wherein the program utilizes the label to identify and enter the zone.
14. The computer-implemented method of claim 2 , wherein the zone performs a task corresponding to the service.
15. The computer-implemented method of claim 2 , wherein the zone is one of a set of zones.
16. A computer system for managing an application, the computer system comprising:
a bus system;
a storage device connected to the bus system, wherein the storage device stores program instructions; and
a processor connected to the bus system, wherein the processor executes the program instructions to:
receive a request from a program on a client device to enter a zone that provides a service, the zone being in an application;
generate the zone based on defined parameters of the zone in response to determining that the zone does not currently exist in the application; and
send an enter notification to the program on the client device indicating that the zone is ready for the program to enter to receive the service.
17. A computer program product for managing an application, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to perform a method comprising:
receiving, by the computer, a request from a program on a client device to enter a zone that provides a service, the zone being in an application;
responsive to the computer determining that the zone does not currently exist in the application, generating, by the computer, the zone based on defined parameters of the zone; and
sending, by the computer, an enter notification to the program on the client device indicating that the zone is ready for the program to enter to receive the service.
18. The computer program product of claim 17 further comprising:
spawning, by the computer, a zone monitoring thread to enforce a set of rules on the zone.
19. The computer program product of claim 17 further comprising:
retrieving, by the computer, a set of rules corresponding to the zone from a storage device; and
defining, by the computer, parameters of the zone based on the set of rules corresponding to the zone.
20. The computer program product of claim 17 further comprising:
receiving, by the computer, an indication from a zone monitoring thread that the program has entered the zone.
21. The computer program product of claim 17 further comprising:
receiving, by the computer, an exit notification from the program on the client device indicating that the program has exited the zone;
responsive to the computer determining that the program is a last program to exit the zone, releasing, by the computer, resources dedicated to the zone; and
instructing, by the computer, a zone monitoring thread to stop enforcing a set of rules on the zone.
22. The computer program product of claim 17 further comprising:
responsive to the computer determining that a number of programs currently in the zone is greater than a threshold number of programs defined for the zone by a set of rules, blocking, by the computer, the program from entering the zone.
23. The computer program product of claim 22 further comprising:
determining, by the computer, whether the number of programs in the zone has decreased to less than the threshold number of programs;
responsive to the computer determining that the number of programs in the zone has decreased to less than the threshold number of programs, sending, by the computer, the enter notification to the program;
responsive to the computer determining that the number of programs in the zone has not decreased to less than the threshold number of programs, determining, by the computer, whether a timeout timer expired; and
responsive to the computer determining that the timeout timer has expired, sending, by the computer, an entry failure notification to the program requesting entrance into the zone.
24. The computer program product of claim 17 , wherein the computer utilizes a zone manager to manage the zone, and wherein the zone manager is included in an operating system of the computer.