REDUCING MESSAGING IN A CLIENT-SERVER SYSTEM

• US 20110145324A1
• Filed: 12/16/2009
• Published: 06/16/2011
• Est. Priority Date: 12/16/2009
• Status: Active Grant

• Current Assignee: Quantum Corporation (Chi Ko Investment Co., Ltd.)
• Original Assignee: Quantum Corporation (Chi Ko Investment Co., Ltd.)
• Inventors: Berge, Eric, Reinart, John Andrew, Lord, Stephen Philip
• Granted Patent: US 8,190,736 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: H04L 67/565 Conversion or adaptation of application format or content adding application control or application functional data H04L67/561
• CPC Class Codes: H04L 67/5651 Reducing the amount or size of exchanged application data

Abstract

A detection that a client-server system, which is operating in a first state mode, has switched from a first use case to a second use case for accessing a property of an object associated with a server. The first state mode during the first use case reduces messaging in the client-server system as compared to using a second state mode. A determination is performed as to whether using the second state mode during the second use case would reduce messaging in the system as compared to using the first state mode. The client-server system is transitioned to the second state mode, if operating in the second state mode would reduce messaging in the client-server system as compared to operating in the first state mode for the second use case.

Claims

1. A method comprising:

detecting, in a client-server system operating in a first state mode, a transition from a first use case to a second use case for accessing a property of an object through a server, wherein the first use case and the second use case are defined in terms of a number of readers and a number of writers communicating with the server to access the object;

determining whether to transition from the first state mode to the second state mode during the second use case,

wherein the first state mode is stateless or stateful, and

the second state mode is stateless, if the first mode is stateful, or stateful, if the first mode is stateless; and

transitioning the server and one or more of the readers and writers of the object in the client-server system to the second state mode, based on the results of the determining whether to transition from the first state mode to the second state mode during the second use case.

2. The method as recited by claim 1, wherein:

the method further comprises accessing a first set of use cases that includes an at-least-one-reader-with-no-writers-use-case, and a single-writer-with-no-readers-use-case;

the method further comprises accessing a second set of use cases that includes a single-writer-with-at-least-one-reader-use-case, and a plurality-of-writers-with-zero-or-more-readers-use-case;

the transitioning server and one or more of the readers and writers of the object in the client-server system further comprises transitioning server and one or more of the readers and writers of the object in the client-server system to the stateless mode if the first use case is associated with the first set of uses cases and the second use case is associated with the second set of use cases; and

the transitioning of the server and one or more of the readers and writers of the object in the client-server system further comprises transitioning the server and one or more of the readers and writers of the object in the client-server system to the stateful mode if the first use case is associated with the second set of use cases and the second use case is associated with the first set of use cases.

3. The method as recited by claim 1, wherein the first state mode is stateful mode and the second state mode is stateless and wherein the transitioning server and one or more of the readers and writers of the object in the client-server system to the stateless mode further comprises:

transmitting to a client, which requested to access the property from the server, a transition message that includes an instruction to transition to stateless mode;

deleting state information, stored in memory accessible by the server, that pertains to the property; and

de-registering the client.

4. The method as recited by claim 3, wherein the method further comprises:

receiving, at the client, the transition message; and

deleting information, which pertains to the property, that is stored in memory accessible by the client.

5. The method as recited by claim 1, wherein the first state mode is stateless and the second state mode is stateful and the transitioning of the client-server system to the stateful mode further comprises:

receiving a message from a client requesting a most recent copy of the property;

transmitting, to the client, a transition message that includes the most recent copy of the property, a token for accessing the property, and an instruction for the client to transition from stateless mode to stateful mode; and

creating state information related to the property as a part of registering the client for accessing the property.

6. The method as recited by claim 5, wherein the method further comprises:

receiving, at the client, the transition message;

storing the most recent copy of the property that is obtained from the received transition message; and

storing the token that is obtained from the received transition message.

7. An apparatus, the apparatus comprising:

a processor,

a memory, and

one or more code modules each comprising computer-readable code operative, when executed, to cause the processor to implement;

a use-case-detector configured for detecting a transition in a client-server system from a first use case to a second use case for accessing a property of an object, wherein the first use case and the second use case are defined in terms of a number of readers and a number of writers accessing the object in a client-server system;

a use-case-to-state-mode-analyzer configured for determining whether to transition from the first state mode to the second state mode during the second use case, wherein the first state mode is stateless or stateful and the second state mode is stateless, if the first mode is stateful, or stateful, if the first mode is stateless; and

a state-mode-transitioner configured for causing the client-server system to transition to the second state mode based on the results of the determining whether to transition from the first state mode to the second state mode during the second use case.

8. The apparatus of claim 7, wherein the first state mode is stateful and the second state mode is stateless and wherein the state-mode-transitioner is further configured for:

transmitting, to a client, which has requested to access a property from the server, a transition message that includes an instruction to transition to stateless mode;

deleting state information, stored in memory that is accessible by the server, that pertains to the property; and

de-registering the client.

9. The apparatus of claim 8, wherein the state-mode-transitioner transmits the transition message to a client apparatus that includes:

a transition message receiver configured for receiving the transition message;

a message analyzer configured for determining that the transition message includes an instruction to transition from stateful mode to stateless mode; and

a stateful-to-stateless-transitioner configured for deleting information, which pertains to the property, that is stored in memory that is accessible by the client.

10. The apparatus of claim 7, wherein the first state mode is stateless and the second state mode is stateful and wherein the state-mode-transitioner is further configured for:

receiving a message from a client requesting a most recent copy of the property;

transmitting, to the client, a transition message that includes the most recent copy of the property from the server, a token for accessing the property, and an instruction for the client to transition from stateless mode to stateful mode; and

creating state information related to the property as a part of registering the client for accessing the property.

11. The apparatus of claim 10, wherein the state-mode-transitioner transmits the transition message to a client apparatus that includes:

a transmission message receiver configured for receiving the transition message;

a message analyzer configured for determining that the transmission message includes an instruction to transition from stateless mode to stateful mode;

a stateless-to-stateful-transitioner configured for

storing the most recent copy of the property that is obtained from the received transition message; and

storing the token that is obtained from the received transition message.

12. The apparatus of claim 7, wherein:

the use-case-to-state-mode-analyzer is further configured for determining that the first state mode is stateful and the second use case is selected from a group consisting of a single-writer-with-at-least-one-reader-use-case, and a plurality-of-writers-with-zero-or-more-readers-use-case; and

the state-mode-transitioner is further configured for transitioning the client-server system from stateful mode to stateless mode in response to the use-case-to-state-mode-analyzer determining that the second use case is selected from the group consisting of the single-writer-with-at-least-one-reader-use-case, and the plurality-of-writers-with-zero-or-more-readers-use-case.

13. The apparatus of claim 7, wherein:

the use-case-to-state-mode-analyzer is further configured for determining that the first state mode is stateless and the second use case is selected from a group consisting of an at-least-one-reader-with-no-writers-use-case, and a single-writer-with-no-readers-use-case; and

the state-mode-transitioner is further configured for transitioning the client-server system from stateless mode to stateful mode in response to the use-case-to-state-mode-analyzer determining that the second use case is selected from the group consisting of the at-least-one-reader-with-no-writers-use-case, and the single-writer-with-no-readers-use-case.

14. A computer readable storage medium having computer-executable instructions stored thereon for causing a computer system to perform a method of reducing messaging in a client-server system, the method comprising:

detecting, in a client-server system operating in a first state mode, a transition from a first use case to a second use case for accessing a property of an object through a server, wherein the first use case and the second use case are defined in terms of a number of readers and a number of writers communicating with the server to access the object;

determining whether to transition from the first state mode to the second state mode during the second use case, wherein the first state mode is stateless or stateful and the second state mode is stateless, if the first mode is stateful, or stateful, if the first mode is stateless; and

transitioning the server and one or more of the readers and writers of the object in the client-server system to the second state mode, based on the results of the determining whether to transition from the first state mode to the second state mode during the second use case.

15. The computer readable storage medium of claim 14, wherein the first state mode is stateful mode and the second state mode is stateless and wherein the transitioning server and one or more of the readers and writers of the object in the client-server system to the stateless mode further comprises:

transmitting to a client, which requested to access the property from the server, a transition message that includes an instruction to transition to stateless mode;

deleting state information, stored in memory accessible by the server, that pertains to the property; and

de-registering the client.

16. The computer readable storage medium of claim 15, wherein the method further comprises:

receiving, at the client, the transition message; and

deleting information, which pertains to the property, that is stored in memory accessible by the client.

17. The computer readable storage medium of claim 14, wherein the first state mode is stateless and the second state mode is stateful and the transitioning of the client-server system to the stateful mode further comprises:

receiving a message from a client requesting a most recent copy of the property;

transmitting, to the client, a transition message that includes the most recent copy of the property, a token for accessing the property, and an instruction for the client to transition from stateless mode to stateful mode; and

creating state information related to the property as a part of registering the client for accessing the property.

18. The computer readable storage medium of claim 17, wherein the method further comprises:

receiving, at the client, the transition message;

storing the most recent copy of the property that is obtained from the received transition message; and

storing the token that is obtained from the received transition message.

19. The computer readable storage medium of claim 14, wherein:

the method further comprises accessing a first set of use cases that includes an at-least-one-reader-with-no-writers-use-case, and a single-writer-with-no-readers-use-case;

the method further comprises accessing a second set of use cases that includes a single-writer-with-at-least-one-reader-use-case, and a plurality-of-writers-with-zero-or-more-readers-use-case;

the transitioning of the client-server system further comprises transitioning the client-server system to the stateless mode if the first use case is associated with the first set of uses cases and the second use case is associated with the second set of use cases; and

the transitioning of the client-server system further comprises transitioning the client-server system to the stateful mode if the first use case is associated with the second set of use cases and the second use case is associated with the first set of use cases.

20. The computer readable storage medium of claim 14, wherein the method further comprises:

operating in the stateful mode when the client-server system is started.