Apparatus and method of lazy connection transaction enlistment

• US 20030182426A1
• Filed: 09/30/2002
• Published: 09/25/2003
• Est. Priority Date: 03/21/2002
• Status: Abandoned Application

• Current Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Jeyaraman, Thulasiraman, Hapner, Mark William, Shannon, William A.
• Application Number:
  US10/262,645
• Publication Number:
  US 20030182426A1
• Time in Patent Office: Days
• US Class Current: 709/226
• CPC Class Codes: G06F 9/544 Buffers; Shared memory; Pipes

Abstract

A method, apparatus and system arranged to provide a connection(s) from an application component to a shared resource only as needed. In this way the total number of connections are limited to only those connections required to execute a particular method thereby saving valuable computing resources. In the described embodiment, after an invoked application component has started a particular transaction, a pre-enlistment notification is returned to the application server thereby putting all resource adapters on notice that a connection may be forthcoming.

Claims

1. A method for providing a transaction connection to a resource requested by an application component for a transaction, comprising:

notifying a resource manager associated with the requested resource that the transaction connection is required only after a first operation after a pre-enlistment notification associated with the requested transaction connection.

2. A method as recited in claim 1, further comprising:

lazily enlisting the transaction connection;

requesting the transaction connection to the resource;

determining if the request is a first connection request operation after the pre-enlistment;

eagerly enlisting the requested connection only after it has been determined that the request is the first connection request operation; and

connecting the application component to the requested resource.

3. A method as recited in claim 1, wherein lazily enlisting comprises:

sending a pre-enlistment notification by a lazy enlistment managed connection interface to an application server associated with the invoked application component by a resource adapter.

4. A method as recited in claim 1, wherein eagerly enlisting comprises:

notifying a resource manager associated with the requested resource that the transaction connection is required.

11. Computer program product as recited in claim 1, wherein eagerly enlisting comprises:

computer code for notifying a resource manager associated with the requested resource that the transaction connection is required.

5. An apparatus for providing a transaction connection to a resource requested by an application component for a transaction, comprising:

means for lazily enlisting the transaction connection;

means for requesting the transaction connection to the resource;

means for determining if the request is a first connection request operation after the pre-enlistment;

means for eagerly enlisting the requested connection only after it has been determined that the request is the first connection request operation; and

means for connecting the application component to the requested resource.

6. An apparatus as recited in claim 5, wherein lazily enlisting comprises:

means for sending a pre-enlistment notification by a lazy enlistment managed connection interface to an application server associated with the invoked application component by a resource adapter.

7. An apparatus as recited in claim 5, wherein eagerly enlisting comprises:

means for notifying a resource manager associated with the requested resource that the transaction connection is required.

8. Computer program product capable of execution on a computing system for providing a transaction connection to a resource requested by an application component for a transaction, comprising:

computer code for notifying a resource manager associated with the requested resource that the transaction connection is required only after a first operation after a pre-enlistment notification associated with the requested transaction connection; and

computer readable medium for storing the computer code.

9. Computer program product as recited in claim 8, further comprising:

computer code for lazily enlisting the transaction connection;

computer code for requesting the transaction connection to the resource;

computer code for determining if the request is a first connection request operation after the pre-enlistment;

computer code for eagerly enlisting the requested connection only after it has been determined that the request is the first connection operation; and

computer code for connecting the application component to the requested resource.

10. Computer program product as recited in claim 8, wherein lazily enlisting comprises:

computer code for sending a pre-enlistment notification by a lazy enlistment managed connection interface to an application server associated with the invoked application component by a resource adapter.