FRAMEWORK FOR DYNAMICALLY GENERATING TUPLE AND PAGE CLASSES

• US 20100223606A1
• Filed: 03/02/2009
• Published: 09/02/2010
• Est. Priority Date: 03/02/2009
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: Oracle International Corporation (Oracle Corporation)
• Inventors: Mishra, Shailendra, Park, Hoyong, Jain, Namit, Srinivasan, Anand
• Granted Patent: US 8,935,293 B2
• Time in Patent Office: Days
• US Class Current: 717/166
• CPC Class Codes: G06F 9/44521 Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
• CPC Class Codes: G06F 9/45504 Abstract machines for programme code execution, e.g. Java virtual machine [JVM], interpreters, emulators

Abstract

Techniques for reducing the memory used for processing events received in a data stream are provided. This may be achieved by reducing the memory required for storing tuples. A method for processing a data stream includes receiving a tuple and determining a tuple specification that defines a layout of the tuple. The layout identifies one or more data types that are included in the tuple. A tuple class corresponding to the tuple specification may be determined. A tuple object based on the tuple class is instantiated, and during runtime of the processing system. The tuple object is stored in a memory.

Claims

1. A method performed by a processing system for processing a data stream comprising events, the method comprising:

receiving a tuple;

determining a tuple specification defining a layout of the tuple, wherein the layout identifies one or more data types included in the tuple;

dynamically, during runtime of the processing system, determining a tuple class corresponding to the tuple specification;

instantiating a tuple object based on the tuple class; and

storing the tuple object in a memory.

2. The method of claim 1, wherein the tuple object has a structure including an object which supports the one or more data types identified in the tuple specification.

3. The method of claim 1, wherein the tuple specification is determined during creation of the data stream.

4. The method of claim 1, further comprising:

determining whether a pre-existing tuple class corresponds to the tuple specification; and

instantiating the tuple object based on the pre-existing tuple class.

5. The method of claim 1, further comprising:

storing the tuple class to a cache of the event processing system.

6. The method of claim 1, further comprising:

generating the tuple class to correspond with the tuple specification; and

loading the tuple class to a Java Virtual Machine™

(JVM) during runtime of the event processing system and prior to instantiating the tuple object.

7. The method of claim 1, wherein a memory requirement of the tuple object is less than a memory requirement of a static tuple object, wherein the static tuple object is based on a tuple class generated statically.

8. A method performed by a processing system for processing a data stream comprising events, the method comprising:

receiving a tuple;

determining a tuple specification defining a layout of the tuple, wherein the layout identifies one or more data types included in the tuple;

dynamically, during runtime of the processing system, determining a page class corresponding to the tuple specification;

instantiating a page object based on the page class; and

storing the dynamic page in a memory.

9. The method of claim 8, wherein the page object has a structure including an array for each of the one or more data types identified in the tuple specification.

10. The method of claim 8, wherein the page object is an array of tuples of a plurality of tuples.

11. The method of claim 8, further comprising:

determining whether a pre-existing page class corresponds to the tuple specification; and

instantiating the page based on the pre-existing page class.

12. The method of claim 8, further comprising:

generating the page class to correspond with the tuple specification; and

loading the page class to a Java Virtual Machine™

(JVM) during runtime of the event processing system and prior to instantiating the dynamic page.

13. A computer-readable storage medium storing a computer program product for processing a data stream comprising events, the computer program product comprising:

computer code for receiving a tuple;

computer code for determining a tuple specification defining a layout of the tuple, wherein the layout identifies one or more data types included in the tuple;

computer code for dynamically, during runtime of the processing system, determining a tuple class corresponding to the tuple specification;

computer code for instantiating a tuple object based on the tuple class; and

computer code for storing the tuple object in a memory.

14. The computer program product according to claim 13, further comprising:

computer code for determining whether a pre-existing tuple class corresponds to the tuple specification; and

computer code for instantiating the tuple object based on the pre-existing tuple class.

15. The computer program product according to claim 13, further comprising:

computer code for generating the tuple class to correspond with the tuple specification; and

computer code for loading the tuple class to a Java Virtual Machine™

(JVM) during runtime of the event processing system and prior to instantiating the tuple object.

16. The computer program product according to claim 13, wherein the tuple specification is determined during creation of the data stream.

17. A system for processing a data stream comprising events, the system including a processor and a memory device including instructions that, when executed by the processor, cause the processor to:

receive a tuple;

determine a tuple specification defining a layout of the tuple, wherein the layout identifies one or more data types included in the tuple;

dynamically, during runtime of the processing system, determine a tuple class corresponding to the tuple specification;

instantiate a tuple object based on the tuple class; and

store the tuple object in a memory.

18. The system according to claim 17, wherein the instructions, when executed by the processor, further cause the processor to:

determine whether a pre-existing tuple class corresponds to the tuple specification; and

instantiate the tuple object based on the pre-existing tuple class.

19. The system according to claim 17, wherein the instructions, when executed by the processor, further cause the processor to:

generate the tuple class to correspond with the tuple specification; and

load the tuple class to a Java Virtual Machine™

(JVM) during runtime of the event processing system and prior to instantiating the tuple object.

20. The system according to claim 17, wherein the tuple specification is determined during creation of the data stream.