JPWO2009157082A1 - Program conversion processing apparatus and program - Google Patents

Abstract

In order to automatically convert a program for a non-Web system into a program for a Web system, the analysis unit 11 of the program conversion processing device 1 analyzes the first program and generates XML data 3 as an analysis result. Meaning means 15 detects a screen display instruction from XML data 3, assigns label information to a processing element executed next to the instruction, and further branches processing based on the label information at the beginning of XML data 3. Is added to generate meaningful XML data 4. The conversion means 17 converts the meaningful XML data 4 and outputs it as a second program.

Description

  The present invention relates to a program conversion processing apparatus and program for automatically converting a program such as a host system into a program for a Web system.

  There is an increasing demand for realizing a non-Web system such as a host system in a Web system using a prevailing environment such as the Internet or an intranet.

  Reconstruction of the system requires a large investment cost and time. Therefore, various program conversion methods have been proposed in order to use the logic of the current system as much as possible and reduce the cost.

  However, when the platform and environment of the current system and the migration system differed greatly, the program conversion process could not be automated, and many parts depended on manual work, which did not reduce costs. In particular, the execution environment of a legacy system such as a host system and a Web system is significantly different, making it difficult to automate program conversion processing.

Note that there is a discrepancy between the input / output target data items and the stored data items in the database of the Web application, and based on input information such as attributes and display formats for each item of the database in order to support Web application development A device for generating a setting file, a program main body, and an execution format file of a database of a Web application is known (see, for example, Patent Document 1).
JP 2004-265278 A

  The host system is a centralized architecture in which a general-purpose computer (hereinafter referred to as the host) processes and stores data. After a terminal logs in, the host maintains a session in the host-terminal communication process. Is called.

  In the client-server system, since the communication session between the client and the server is controlled within the client application after the start of the client communication, there is no need to consider it in particular.

  On the other hand, in a Web system, since communication between a Web client (client Web browser) and a Web server (Web server application) is HTTP (HyperText Transfer Protocol) communication, session management is required.

  For example, when a page transition occurs on the Web client side (Web browser), the memory information held in the page is discarded and the session cannot be held, so the session management is performed on the Web server side.

  However, when the processing control of the host system is realized by the Web system, the screen transition cannot be appropriately controlled simply by converting the host application into the Web server application and performing normal server-side session management.

  The restrictions on screen transition control in the Web system will be described with reference to FIGS. 13 and 14. In this description, it is assumed that the host (server) side controls display of a plurality of screens on the terminal (client) side.

  FIG. 13 is a diagram illustrating an operation example of a host-side application program in the host system.

  When the terminal 90 of the host system transmits a processing request (a), an application program (host-side application) 91 executed on the host side is executed from the “start of program”, and predetermined processing (instruction group) is executed. (B). If there is a “screen A display command” in the host-side application 91, screen A data is transmitted to the terminal 90 (c).

  When the input processing on the screen A is executed by the terminal 90 and data is transmitted to the host side (d), the processing group subsequent to the “screen A display command” of the host side application 91 is executed (e).

  Subsequently, if there is a “screen B display command” in this process, the screen B data is transmitted to the terminal 90 (f). Similarly, when the input process on the screen B is executed by the terminal 90 and the data is transmitted to the host side, the process group subsequent to the “screen B display command” is executed (g).

  As described above, a plurality of screen display processes linearly described in the host-side application 91 are appropriately controlled.

  FIG. 14 is a diagram illustrating an operation example of an application program on the Web server side in the Web system.

  When the Web client 94 of the Web system transmits a request message to an application program (Web server side application) 95 executed on the Web server side (a), the Web server side application 95 is started and executed from “start of program”. Then, a predetermined process (instruction group) is executed (b). If there is a “screen A display command” in the Web server side application 95, the screen A data is transmitted to the Web client 94 (c).

  Even if the next message is transmitted from the Web client 94 after execution of the “screen A display command” (d), the Web server side application 95 is executed from the “start of program” and immediately follows the “screen A display command”. The process is not executed.

  In order to execute the next processing of the “screen A display command” described in the Web server side application 95, “branch logic” is defined after “start of program”, and a message from the Web client 94 is defined. It is necessary to specify the processing corresponding to (for example, the processing command next to the screen A display command) and perform jump processing to the specified command.

  Similarly, the processing group after the “screen A display command” is executed (e), and after the “screen B display command” is executed (f), even if the next message is transmitted from the Web client 94 (g), The next process of the “screen B display command” is not immediately executed. Also in this case, it is necessary to specify that the process corresponding to the message is the process next to the “screen B display command” and perform the jump process (h).

  As described above, the processing control similar to that of the host system cannot be realized in the Web system due to the nature of HTTP communication in the Web system only by converting the host-side application 91 to the Web application.

  The present invention has been made in view of such problems, and an object thereof is to provide an apparatus and a program for automatically converting a program for a non-Web system into a program for a Web system.

  A program conversion processing apparatus 1 according to the present invention is an apparatus for converting a first program for a non-Web system into a second program for a Web system, and 1) for acquiring the first program and analyzing the first program. Analyzing means for analyzing the first program by referring to the dictionary and generating a predetermined script as an analysis result, and 2) detecting a predetermined instruction from the script and executing it after the instruction in the script A conversion means indicating a correspondence relationship from the script to the second program, and a meaning table for adding a label process to the processing element and adding a branch process based on the label information to the head part of the script. And converting means for converting the script processed by the meaning assigning means and outputting it as a second program.

  In this program conversion processing device, the analysis means analyzes the first program for the host system, for example, and generates a script (for example, XML data) as an analysis result. Then, the meaning assigning means detects a predetermined instruction, for example, a data output instruction to the client, from the script, and gives label information to a processing element executed next to the detected instruction in the script. Furthermore, branch processing based on this label information is added to the head of the script.

  Then, the converting means converts the XML data to which the information is added (meaningful XML data) and outputs it as the second program.

  In the output second program, branch processing based on label information is set immediately after the start of the program, so that jump processing to the processing element corresponding to the screen transition state in the Web client is possible, and the Web server side performs Web processing. Processing control to the client is possible.

  Thereby, for example, since the second program for the Web system that can realize the Web system that takes over the architecture of the host system is generated by the automatic conversion process, the function sharing between the host and the terminal can be reproduced in the Web system.

  In addition, since the second program reflecting the structure of the program for the host system is generated, the readability of the second program and the correspondence relationship with the first program can be easily understood, and the maintainability after migration is improved. .

  According to the present invention, it is possible to obtain a Web system program on the premise of HTTP communication from a program for a non-Web system such as a host system, which greatly increases the work efficiency and cost burden of program conversion processing accompanying system migration. Can be improved.

It is a figure which shows the structural example of a program conversion processing apparatus. It is a figure which shows the XML data with meaning to which the label information was provided to the processing element. It is a figure which shows the example of label information preserve | saved at session information. It is a figure which shows the example of meaningful XML data to which label information and branch processing were added. It is a figure which shows the 1st program comprised with a main program and a subroutine in the state which expand | deployed the subroutine. It is a figure which shows the example of meaningful XML data to which label information, jump processing, and branch processing are added when there is a subroutine in the first program. It is a figure which shows the example of the label information and function information preserve | saved in session information. It is a figure which shows the example of a processing flow of a program conversion processing apparatus. It is a figure which shows the RPG program source example which is a 1st program. It is a figure which shows the example of an XML script which is XML data. It is a figure which shows the example of an XML script which is XML data with a meaning. The second program, VB. It is a figure which shows a NET program source example. It is a figure explaining the operation example of the host side application program in a host system. It is a figure explaining the operation example of the web server side application program in a web system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Program conversion processing apparatus 11 Analysis means 13 Analysis dictionary 15 Meaning means 17 Conversion means 19 Conversion table 3 XML data 4 Meaning XML data

  FIG. 1 is a diagram showing a configuration example of a program conversion processing apparatus 1 according to the present invention.

  The program conversion processing device 1 is a processing device that converts a first program into a second program for a Web system, and includes an analysis means 11, an analysis dictionary 13, a meaning assignment means 15, a conversion means 17, and a conversion table 19. .

  The analysis unit 11 acquires the first program, refers to the analysis dictionary 13 for the first program analysis process, performs the analysis process of the first program, and generates XML (Extensible Markup Language) data 3 as the analysis result. Generate.

  The meaning assigning means 15 detects a predetermined command, for example, a “screen display command” to the client from the XML data 3, and assigns it to each processing element executed next to the “screen display command” in the XML data 3. Label information is given. Further, branch processing based on label information is added between the beginning of the XML data 3, for example, from the start of the program to the first processing element.

  Further, when the “screen display instruction” is detected in the subroutine of the XML data 3, the meaning assigning means 15 acquires the function information of the subroutine. Then, jump processing to the subroutine based on the function information is added to the head portion of the XML data 3. Further, a branch process corresponding to the label information in the main program is added to the head part of the main program of the XML data 3, and a branch process corresponding to the label information in the subroutine is added to the head part of the subroutine. The XML data 3 to which label information, branch information, jump information, and the like are added is referred to as meaningful XML data 4.

  The conversion means 17 includes a conversion table 19 indicating the correspondence relationship between the meaningful XML data 4 and the second program, converts the meaningful XML data 4 based on the conversion table 19, and outputs the converted data as a second program.

  Below, operation | movement of the program conversion processing apparatus 1 is demonstrated.

  The first program acquired by the program conversion processing device 1 is a source program shown in the host-side application 91 shown in FIG.

  The analysis unit 11 performs an analysis process based on the analysis dictionary 13 on the first program, and generates XML data 3 that is an analysis result.

  Next, the meaning assigning means 15 detects “screen A display command” and “screen B display command” from the XML data 3, and gives label information to the processing element to be executed next to these commands in the XML data 3. Give.

  FIG. 2 is a diagram illustrating an example of meaningful XML data 4 in which label information is added to the XML data 3.

  In the XML data of FIG. 2, “label 1:” is assigned to the processing element executed after the first “screen A display instruction”, and “processing element executed next to the second“ screen B display instruction ”is“ Label 2: "is given respectively.

  This label information is stored as part of session information between the Web server and the Web client while the second program is being executed in the Web system.

  FIG. 3 is a diagram illustrating an example of label information stored in the session information.

  When the “screen A display command” is executed while the second program is being executed in the Web system, “label information: label 1” is stored in the session information as shown in FIG. . Similarly, when the screen B display command is executed, “label information: label 2” is stored in the session information as shown in FIG.

  The conversion means 17 adds a branch process based on label information after the program start position (start of program) of the semantic XML data 4 shown in FIG.

  FIG. 4 is a diagram showing meaningful XML data 4 to which branch conditions are added. In this branch process, the branch condition is determined based on the value of the label information in the session information when the second program is executed.

  The conversion means 17 converts the meaningful XML data 4 shown in FIG. 4 based on the conversion table 19 and outputs the converted second program.

  In the second program converted from the meaningful XML data 4 of FIG. 4, when the screen B is displayed on the Web client, the session information shown in FIG. 3B is stored on the Web server side.

  Therefore, in the Web server, when a request message transmitted while the screen B is displayed on the Web client side is received, a branch process based on the label information set at the top of the second program is executed, and the next screen B display command is received. It is possible to jump to this process and execute the process.

  Next, a processing example of the program conversion processing device 1 when a specific command, “screen display command” is detected from a subroutine in the XML data 3 of the first program will be described.

  FIG. 5 is a diagram showing a first program composed of a main program and a subroutine in a state where the subroutine is expanded.

  As shown in FIG. 5, when the “screen B display instruction” of the first program is in the subroutine 1, in the branch processing added to the head of the program, that is, the main program portion, the processing element of the label 2 in the subroutine 1 Since the jump process to is prohibited, the process of “Label 2:” cannot be executed.

  When the "screen display command" is detected from within the subroutine in the XML data 3, the meaning assigning means 15 acquires the function information of the subroutine, and at the beginning of the meaningful XML data 4, for example, from the start of processing. Jump processing by function information is added between the processing elements.

  Further, a branch process (main branch process) corresponding to the label information in the main program in the meaningful XML data 4 is added after the jump information by the function, and the branch process corresponding to the label information in the subroutine ( Sub branch processing) is added to the head of the corresponding subroutine.

  FIG. 6 is a diagram illustrating an example of meaningful XML data 4 to which label information, jump processing, and branch processing are added when there is a subroutine.

  The function information of the subroutine is stored as a part of the session information of the Web system, like the label information, while the second program is executed in the Web system.

  FIG. 7 is a diagram illustrating an example of label information and function information stored in the session information.

  In the second program converted from the meaningful XML data 4 in FIG. 6, when the screen B is displayed on the Web client, as shown in FIG. 7, the “label information: label 2, function information” is displayed on the Web server side. : Session information including "Subroutine 1" is saved.

  Therefore, in the Web server, when the request message transmitted while the screen B is displayed on the Web client side is received, the jump process to the subroutine 1 is performed by the jump process based on the function information set at the head of the second program. , And the processing can be executed by jumping to the next processing of the screen B display instruction by the sub branch processing set at the head in the subroutine.

  The conversion means 17 converts the meaningful XML data 4 as shown in FIG. 4 or FIG. 6 using the conversion table 19 and outputs the converted second program.

  As described above, the program conversion processing device 1 can output the second program coded so as to be able to control the screen display processing from the Web server side to the Web client from the input first program.

  FIG. 8 is a diagram showing a processing flow of the program conversion processing device 1.

  The analysis unit 11 reads the first program to be converted (step S1), analyzes the first program using the analysis dictionary 13, and generates XML data 3 that is the analysis result (step S2).

  Meaning means 15 detects a specific command (for example, “screen display command”) from XML data 3 (step S3), and assigns label information to each processing element to be executed next to each screen display command ( Step S4). The XML data 3 to which label information is attached is referred to as meaningful XML data 4.

  When the meaning assigning means 15 detects a screen display command in the subroutine of the XML data 3 (YES in step S5), the function information of the subroutine is acquired and the screen display is displayed at the head of the meaningful XML data 4. A jump process to each subroutine in which the instruction is executed is added (step S6).

  Further, the meaning means 15 adds a branch process (main branch process) based on the label information in the main program after the jump information of the program, and uses the label information in the subroutine at the head of the corresponding subroutine. A branch process (sub branch process) is added (step S7).

  When the screen display command is not detected in the subroutine of the XML data 3 (NO in step S5), the meaning assigning means 15 adds a branch process based on the label information to the head portion of the meaningful XML data 4 ( Step S8).

  Thereafter, the conversion means 17 converts the meaningful XML data 4 based on the conversion table 19 and outputs the second program (step S9).

  9 to 12 are diagrams showing specific examples of programs processed by the program conversion processing device 1 according to the present embodiment.

  FIG. 9 shows an example of a program source by RPG (Report Program Generator) which is the first program. The first program includes a main program (MAINLINE) including two output processes (EXFMTPROMPT) and a subroutine (SUBROUTINE_SFLPRC) including one output process (EXFMTSUBCTL).

  FIG. 10 is an example of an XML script, which is XML data 3 generated by performing analysis processing on the first program of FIG.

  FIG. 11 is an example of an XML script, which is XML data 4 with meaning obtained by adding a script for label information, jump processing, and branch processing to the XML data 3 in FIG.

  12 shows a second program converted from the meaningful XML data 4 of FIG. It is an example of a program source by NET.

  Although the present invention has been described above with reference to the embodiments, it is obvious that the present invention can be variously modified within the scope of the gist thereof.

  The program conversion processing device 1 according to the present invention can be implemented as a program that is read and executed by a computer. This program can be stored in an appropriate recording medium such as a portable medium memory, semiconductor memory, or hard disk, which can be read by a computer, provided by being recorded on these recording media, or via a communication interface. It is provided by transmission and reception using various communication networks.

Claims (4)

A program conversion processing device for converting a first program for a non-Web system into a second program for a Web system,
Analyzing means for obtaining a first program, referring to the analysis dictionary of the first program, analyzing the first program, and generating a predetermined script as an analysis result;
Meaning of detecting a predetermined instruction from the script, adding label information to a processing element to be executed next to the instruction of the script, and adding branch processing based on the label information to the head of the script Means,
A conversion table that indicates a correspondence relationship from the script to the second program, and a conversion unit that converts the script processed by the meaning unit based on the conversion table and outputs the converted script as a second program. A program conversion processing device. When the instruction is detected in the subroutine of the script, the meaning assigning means acquires the function information of the subroutine and adds a jump process to the corresponding subroutine based on the function information at the head of the script. A branch process corresponding to the label information in the main program is added to the head part of the main program of the script, and a branch process corresponding to the label information in the subroutine is added to the head part of the subroutine. The program conversion processing device according to claim 1. A program conversion processing program for converting a first program for a non-Web system into a second program for a Web system,
Computer
Analyzing means for obtaining a first program, referring to the analysis dictionary of the first program, analyzing the first program, and generating a predetermined script as an analysis result;
Meaning of detecting a predetermined instruction from the script, adding label information to a processing element to be executed next to the instruction of the script, and adding branch processing based on the label information to the head of the script Means,
A conversion table showing a correspondence relationship from the script to the second program, and converting the script processed by the meaning means based on the conversion table to function as a conversion means for outputting as a second program. Program conversion processing program. When the instruction is detected in the subroutine of the script, the meaning assigning means acquires the function information of the subroutine and adds a jump process to the corresponding subroutine based on the function information at the head of the script. A branch process corresponding to the label information in the main program is added to the head part of the main program of the script, and a branch process corresponding to the label information in the subroutine is added to the head part of the subroutine. The program conversion processing program according to claim 3.

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