METHOD AND APPARATUS FOR PROVIDING A SYNCHRONOUS INTERFACE FOR AN ASYNCHRONOUS SERVICE

• US 20090292765A1
• Filed: 05/19/2009
• Published: 11/26/2009
• Est. Priority Date: 05/20/2008
• Status: Active Grant

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Carey, Kenneth D., Leedberg, Gregory, Spencer, George W. JR.
• Granted Patent: US 7,970,814 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: G06F 9/541 via adapters, e.g. between incompatible applications

Abstract

Methods and apparatus for providing a synchronous interface for an asynchronous service including, in a synchronous interface engine executing on a processor, receiving a request from a client for the asynchronous service, issuing an asynchronous service request to perform the asynchronous service, the asynchronous service request including a unique client identifier, and associating a wait condition with the unique client identifier to indicate to the client to wait for a result of the asynchronous service. Methods and apparatus further include receiving the result of the asynchronous service, the result including the unique client identifier, removing the associated wait condition, and sending the result to the client.

Claims

1. A method for providing a synchronous interface for an asynchronous service, comprising:

in a synchronous interface engine executing on a processor to provide the synchronous interface, receiving a request from a client for the asynchronous service;

issuing an asynchronous service request to perform the asynchronous service, the asynchronous service request including a unique client identifier;

associating a wait condition with the unique client identifier to indicate to the client to wait for a result of the asynchronous service;

receiving the result of the asynchronous service, the result including the unique client identifier;

removing the associated wait condition; and

sending the result to the client.

2. The method of claim 1, further including associating the wait condition with a semaphore, acquiring the semaphore, and removing the associated wait condition comprises releasing the semaphore.

3. The method of claim 2, wherein the client waits until the semaphore is released.

4. The method of claim 2, wherein the client request includes a plurality of requests, ones of the requests originating from different clients, the unique client identifier includes a plurality of unique client identifiers for the ones of the requests, and the associated wait condition includes a plurality of associated wait conditions for ones of the unique client identifiers.

5. The method of claim 4, wherein associating the wait condition further comprises:

representing the ones of the requests in a row of a hash table comprising;

the unique client identifier; and

the semaphore representing the associated wait condition; and

removing the associated wait condition further comprises;

locating the resulting unique client identifier in a hash table row and releasing the semaphore represented in the hash table row.

6. The method of claim 1 further comprising:

in an asynchronous request broker, receiving a request from a client for the asynchronous service, associating a unique client identifier with the client, and issuing an asynchronous service request to perform the asynchronous service, the asynchronous service request including the unique client identifier;

in a wait condition processor, associating a wait condition with the unique client identifier to indicate to the client to wait for a result of the asynchronous service, and;

in an asynchronous result broker, receiving the result of the asynchronous service, the result including the unique client identifier, and removing the associated wait condition, wherein upon removing of the associated wait condition, the wait condition processor sends the result to the client.

7. An apparatus for providing a synchronous interface for an asynchronous service, comprising:

a synchronous interface engine executing on a processor to provide the synchronous interface, comprising;

an asynchronous request broker to;

receive a request from a client for the asynchronous service;

associate a unique client identifier with the client; and

issue an asynchronous service request to perform the asynchronous service, the asynchronous service request including the unique client identifier;

a wait condition processor to;

associate a wait condition with the unique client identifier to indicate to the client to wait for a result of the asynchronous service; and

an asynchronous result broker to;

receive the result of the asynchronous service, the result including the unique client identifier; and

remove the associated wait condition,

wherein upon removing of the associated wait condition, the wait condition processor sends the result to the client.

8. The apparatus of claim 7, wherein the wait condition processor acquires a semaphore to represent the associated wait condition, and the asynchronous result broker releases the semaphore to remove the associated wait condition.

9. The apparatus of claim 8, wherein the wait condition processor waits until the semaphore is released.

10. The apparatus of claim 7, wherein the wait condition processor represents the request in a row of a hash table comprising:

the unique client identifier; and

the semaphore representing the associated wait condition; and

the asynchronous result broker locates the resulting unique client identifier in a hash table row and release the semaphore represented in the hash table row.

11. An article, comprising:

a storage medium having stored instructions thereon that when executed by a machine result in a synchronous interface for an asynchronous service enabling;

in the synchronous interface, receiving a request from a client for the asynchronous service;

issuing an asynchronous service request to perform the asynchronous service, the asynchronous service request including a unique client identifier;

associating a wait condition with the unique client identifier to indicate to the client to wait for a result of the asynchronous service;

receiving the result of the asynchronous service, the result including the unique client identifier;

removing the associated wait condition; and

sending the result to the client.

12. The article of claim 11, further including associating the wait condition with a semaphore, acquiring the semaphore, and removing the associated wait condition comprises releasing the semaphore.

13. The article of claim 12, wherein the client waits until the semaphore is released.

14. The article of claim 12, wherein the client request includes a plurality of requests, ones of the requests originating from different clients, the unique client identifier includes a plurality of unique client identifiers for the ones of the requests, and the associated wait condition includes a plurality of associated wait conditions for ones of the unique client identifiers.

15. The article of claim 14, wherein associating the wait condition further comprises:

representing the ones of the requests in a row of a hash table comprising;

the unique client identifier; and

the semaphore representing the associated wait condition; and

removing the associated wait condition further comprises;

locating the resulting unique client identifier in a hash table row and releasing the semaphore represented in the hash table row.