CONVERTER, SERVER SYSTEM, CONVERSION METHOD AND PROGRAM

• US 20090235257A1
• Filed: 03/13/2009
• Published: 09/17/2009
• Est. Priority Date: 03/14/2008
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Ohara, Moriyoshi, Komatsu, Hideaki
• Granted Patent: US 8,150,852 B2
• Time in Patent Office: Days
• US Class Current: 718/101
• CPC Class Codes: G06F 9/541 via adapters, e.g. between incompatible applications

Abstract

A converter for converting an application program that is executed for every job request into a batch processing program for collectively processing a plurality of job requests. The converter includes: a code identifier for identifying a portion of the application program that includes a service request to another server, and a portion that does not include a service request; an integration unit for converting the service request into a collective service request that collectively issues a plurality of service requests corresponding to the plurality of job requests; a multiplexing unit for converting the processing code in the application program into a multiplexed code for executing multiple processings corresponding to the plurality of job requests; and an output unit for outputting, as the batch processing program, the application program that the integration unit and the multiplexing unit have processed.

Claims

1. A converter for converting an application program to be executed for every job request, in a plurality of job requests, into a batch processing program for collectively processing the plurality of job requests, comprising:

a code identifier for identifying a portion of the application program that includes a service request code to issue a service request to another server, and a portion of the application program that does not include a service request code;

an integration unit for converting the service request code in the application program into a collective service request code that collectively requests a plurality of services corresponding to the plurality of job requests;

a multiplexing unit for converting the processing code in the application program into a batch processing program that multiplexes the execution of multiple processings corresponding to the plurality of job requests; and

an output unit for outputting, as the batch processing program, the application program that the integration unit and the multiplexing unit have processed.

2. The converter according to claim 1, wherein the integration unit includes means responsive to a query in the application program for issuing a service request to a database server as the service request, to convert a code for issuing the query in the application program into a single collective service request code, by collectively listing, in a single description, a plurality of queries corresponding to the plurality of job requests.

3. The converter according to claim 1, wherein the integration unit includes means, responsive to a query in the application program for issuing a service request to a database server as the service request, for converting a code for issuing the query in the application program into a code for issuing a single combined query obtained by combining a plurality of queries corresponding to the plurality of job requests.

4. The converter according to claim 3, wherein the integration unit describes the code for issuing the combined query by use of a SELECT statement having, as a WHERE condition, a sum of sets of multiple WHERE conditions corresponding to the plurality of job requests, in a case where the code for issuing the query included in the application program is described by use of a SELECT statement for accessing a single database table.

5. The converter according to claim 1, further comprising:

a side effect detector for detecting, from the application program, a code for executing processing having an influence on a processing result of any other job request; and

a roll back insertion unit for inserting, into the application program before the code detected by the side effect detector, a code for issuing a roll back request to roll back the processings that have been performed for all service requests issued for the plurality of job requests, wherein the output unit outputs, as the batch processing program, the application program that the roll back insertion unit has processed.

6. The converter according to claim 1, further comprising:

a roll back insertion unit for inserting, into an application program, a code for issuing a roll back request to roll back processing that has been performed for all service requests issued for the plurality of job requests, on condition that the roll back request is to be issued in accordance with any of the job requests, wherein the output unit outputs, as the batch processing program, the application program that the roll back insertion unit has processed.

7. The converter according to claim 6, further comprising:

a recall insertion unit, responsive to insertion by the roll back insertion unit of a code for issuing the roll back request into the application program, for inserting, into the application program, a code for calling the application program in accordance with each of the plurality of job requests individually.

8. The converter according to claim 1, further comprising:

a variable converter for converting a variable in the application program into a vector variable assigned indices respectively corresponding to the plurality of job requests, wherein the output unit outputs, as the batch processing program, the application program that the variable converter has processed.

9. The converter according to claim 1, further comprising:

a mask vector insertion unit for inserting, into the application program, a code for generating a mask vector for each of multiple stages obtained by separating code sequences in the application program, where the mask vector stores, as indices of the respective job requests, values each specifying whether or not to execute the stage, wherein the output unit outputs, as the batch processing program, the application program that the mask vector insertion unit has processed.

10. The converter according to claim 9, wherein the mask vector insertion unit comprises means for inserting, into the application program, a code for generating a mask vector of the stage by performing, for each of the indices, an OR operation on a plurality of mask vectors of the preceding stages, the mask vectors respectively passed over from the preceding stages.

11. A server system for executing processing in accordance with a job request provided by a client and for responding the client with a processing result, the server system comprising:

a converter for converting an application program to be executed for every job request into a batch processing program for collectively processing the plurality of job requests; and

an execution unit for calling and executing the batch processing program for each plurality of job requests and then for outputting a plurality of execution results in accordance with the plurality of job requests, wherein the converter includes;

a code identifier for identifying a portion in the application program that includes service request code to request another server to execute processing, and a portion in the application program that does not include a service request code;

an integration unit for converting the service request code in the application program into a collective service request code that collectively requests a plurality of services corresponding to the plurality of job requests;

a multiplexing unit for converting the application program into a batch processing program that multiplexes the execution of multiple processings corresponding to the plurality of job requests; and

an output unit for outputting, as the batch processing program, the application program that the integration unit and the multiplexing unit have processed.

12. The server system according to claim 11, wherein:

the converter includes a generator for generating a batch processing program that can process a variable number of job requests; and

the execution unit includes means for determining the number of job requests to be collectively processed in accordance with a response time for job requests provided to the server system, and then causing the called batch processing program to collectively process the determined number of job requests.

13. A conversion method for converting an application program to be executed for every job request into a batch processing program for collectively processing the plurality of job requests, comprising the steps of:

identifying a portion of the application program that includes a code to issue a service request to request another server to execute processing;

identifying a portion of the application program that does not include such a code;

converting the service request code in the application program into a collective service request code that collectively requests a plurality of services corresponding to the plurality of job requests;

converting the application program into a batch processing program that multiplexes the execution of multiple processings corresponding to the plurality of job requests; and

outputting, as the batch processing program, the application program that the integration unit and the multiplexing unit have processed.

14. A computer-readable storage medium tangibly embodying computer-executable instructions program for causing a computer to function as a converter for an application program to be executed for every job request into a batch processing program for collectively processing the plurality of job requests, wherein the instructions program when implemented, causes the computer to perform the steps of:

identifying a portion of the application program that includes a code to issue a service request to request another server to execute processing;

identifying a portion of the application program that does not include such a code;

converting the service request code in the application program into a collective service request code that collectively requests a plurality of services corresponding to the plurality of job requests;

converting the application program into a batch processing program that multiplexes the execution of multiple processings corresponding to the plurality of job requests; and

outputting, as the batch processing program, the application program that the integration unit and the multiplexing unit have processed.