System and method for allocation of threads to user objects in a computer system

• US 8,671,410 B2
• Filed: 09/30/2005
• Issued: 03/11/2014
• Est. Priority Date: 10/04/2004
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Sinha, Anand
• Primary Examiner(s): Truong, Camquy
• Application Number:
  US11/240,204
• Publication Number:
  US 20060075405A1
• Time in Patent Office: 3,084 Days
• Field of Search: 718/105
• US Class Current: 718/104
• CPC Class Codes: G06F 2209/5018 Thread allocation
• CPC Class Codes: G06F 9/5033 considering data affinity
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46

Abstract

A method for allocating threads to a user in a computer system is described. The method comprises queuing up work for a first user and permanently assigning a first thread to the first user, wherein the first thread performs the queued up work for the first user, and wherein each time work is subsequently queued up for the first user, the first thread performs the queued up work for the first user.

Claims

1. A method, operating on a computer system that uses a plurality of threads, for allocating the threads, the method comprising:

queuing up work for a first user;

assigning a first thread of the plurality of threads to the first user to perform the queued up work for the first user, the assignment being permanent until the computer system is shut down or an error condition occurs, wherein only the first thread is used to access resources used by the first user and upon the completing the queued up work for the first user, the necessary databases and resources used by the first user remain open for use only by the first thread;

responsive to a determination that the primary database can be opened, opening the primary database and performing operations using the primary database;

responsive to a determination that the primary database cannot be opened, opening a backup database for the first user and performing operations using the backup database; and

responsive to detection of a first error condition comprising a hang-up condition of the first thread, migrating the first user to a second thread.

2. A system for allocating threads to a user in a server environment that supports a plurality of threads, the system comprising:

a server computer;

software executable on the server computer to queue up work for a first user;

software executable on the server computer to assign a first thread to the first user to perform the queued up work for the first user, the assignment being permanent until the server computer is shut down or an error condition occurs, wherein only the first thread is used to access resources used by the first user and upon completing the queued up work for the first user, necessary databases and resources used by the first user remain open for use only by the first thread;

software executable on the server computer, responsive to a determination that the primary database can be opened, to open the primary database and to perform operations using the primary database;

software executable on the server computer, responsive to a determination that the primary database cannot be opened, to open a backup database for the first user and to perform operations using the backup database; and

software executable on the server computer, responsive to detection of a first error condition comprising a hang-up condition of the first thread, to migrate the first user to a second thread.

3. A computer system comprising:

a host computer; and

redirector software executable on the host computer, the redirector software for redirecting data items of a user to the user'"'"'s mobile data communications device (“

MDCD”

),

wherein;

responsive to work being queued up for the user, the host computer assigns a thread to the user to perform the queued up work for the user, the assignment being permanent until the host computer is shut down or an error condition occurs,

only the first thread is used to access resources used by the first user and upon completing the queued up work for the first user, the necessary databases and resources used by the first user remain open for use only by the first thread;

responsive to a determination that the primary database can be opened, the host computer opens the primary database and performs operations using the primary database;

responsive to a determination that the primary database cannot be opened, the host computer opens a backup database for the first user and performs operations using the backup database; and

responsive to detection of a first error condition comprising a hang-up condition of the first thread, the host computer migrates the first user to a second thread.