JP2850322B2 - Load module replacement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a load module exchanging apparatus, and aims to prevent old and new load modules from being called during business processing for calling the same load module more than once. In an online processing apparatus provided with a business processing management unit that analyzes an input message and sequentially calls a predetermined load module to perform a requested business processing, the online processing apparatus is registered in a load module library based on a physical identifier, and is called by the main module. A load module replacement device for replacing a load module loaded on a memory with a modified load module during online establishment, wherein load information of each load module including a physical identifier and a replacement flag that is incremented for each replacement instruction is included. A program management file filed by logical identifier A corresponding logical identifier in the program management file based on a replacement instruction file storing a replacement instruction switch that is stepped up for each module replacement instruction, and a logical identifier to be replaced and a physical identifier of the modified load module. A module replacement instruction processing unit for updating the physical identifier corresponding to the above and incrementing the exchange flag and incrementing the value of the exchange instruction switch, and a load control area and an exchange instruction switch on the main memory at the time of online opening. Area, transfer all the load information in the program management file to the load control area, and secure and clear the entry point address data area indicating the load destination respectively. An open processing unit for reading a switch value and transferring the read value to the replacement instruction switch area; Analyze the sentence, the business process management unit that notifies the start of the business process at the start of the business process, and by the notification, compare the value of the exchange instruction switch area and the contents of the exchange instruction file,
A replacement necessity determination unit that determines whether or not replacement is required when matching, and determines that replacement is required when they do not match, and replaces the content of the replacement instruction file with the replacement instruction switch area; Comparing the replacement flag of the load information transferred to the load control area, extracting the mismatched load information from the program management file,
A replacement processing unit that replaces the corresponding load information of the load control area and clears the entry point address data of the load information; and when a call request is made by the business processing management unit, the load information of the load control area is changed. See,
If the entry point address data of the load module is set, the control is transferred to the entry point address. Otherwise, the entry point notified by loading the load module of the physical identifier corresponding to the specified logical identifier is notified. A call processing unit for performing a call process of setting address data and transferring control, determining whether or not the load module needs to be replaced at the start of the business process, replacing only the load information instructed to be replaced, and changing the entry point address data. It is configured so that it is cleared and the modified load module is loaded and replaced when called.

[Industrial applications]

 The present invention relates to a load module replacement device.

In the financial system, each terminal is connected online with a center device during business hours, and the center device performs business processing (referred to as a transaction) requested from the terminal as needed and a response of a processing result in real time.

Transactions requested from this terminal are of a very large number, for example, such as deposit and withdrawal processing and ledger updating, but since there are many common parts in data processing, each business program is divided into subprograms, and each subprogram is a load module. It is configured to be registered and called as.

In a business program composed of a large number of subprograms (load modules), when it becomes necessary to modify a certain load module, it is desired to immediately replace the modified load module even during business, that is, online. However, depending on the business process, the same load module may be called a plurality of times, and if the replacement is performed during the business process, the old and new load modules may be called and an unexpected processing result may be output. .

Therefore, there is a need for a load module replacement device that solves the above problems.

[Conventional technology]

FIG. 9 is an explanatory diagram of a conventional load module replacement method. In the figure, reference numeral 1 denotes a plurality of online terminals connected to a center device via a communication line or the like; 2 denotes a main control unit of the center device; In response to this processing request, the load module (subprogram) 60 is requested to perform predetermined processing, and the processing result is returned to the online terminal 1.

A, B... D are load modules 6 for executing predetermined processing.
0, for example, the load module A is a subprogram that is called from the main control unit 2 and updates the ledger. During the processing, for example, when the date is to be recorded, the load module B is called and the load module A is loaded. Module B
Is configured to sequentially call sub-programs, such as calling the load module C, to execute predetermined processing.

In the above online system, when modifying a certain load module 60, the modified load module 60b is created and replaced, but whether or not to branch to the modified load module 60b is specified so that the replacement can be performed online. A control table 5 is provided, and a replacement routine 6 for determining whether to branch to the modified load module 60b or execute its own routine with reference to the control table 5 is provided at the beginning of each of the load modules A to D. I have.

Therefore, when a replacement instruction is set in the control table 5 when performing the replacement process, the load module 60 to be replaced is set.
Is called, the process branches to the modification load module 60b, so that the online replacement process is achieved.

[Problems to be solved by the invention]

As described above, the replacement of load modules online is conventionally performed by a method in which a replacement routine is incorporated in each load module.

However, this method has a limitation on the number of replacements due to the limitation of the control table. Further, since a replacement routine is provided for each load module, the load modules themselves cannot be replaced, and there is also a problem of replacement timing.

For this reason, a separate call processing unit is provided to request the load module to be called with the logical identifier data (logical ID) as a parameter, and to call the load module based on the physical ID of the load module set corresponding to the logical ID. If
The inventor has proposed that the physical module can be replaced to replace the load module itself, but the possibility that the old and new load modules are called by the same transaction has not been solved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a load module replacement device that solves the timing of a replacement process.

[Means for solving the problem]

The load module exchanging apparatus of the present invention, as shown in the principle explanatory diagram of FIG. 1, includes a business process management unit 12 which analyzes an input message, sequentially calls a predetermined load module, and performs a required business process. A load module replacement device that is registered in the load module library based on the physical identifier and replaces the load module 60 loaded and loaded on the main memory with the correction load module 60b during online opening. There is a program management file 15 in which the load information 50 of each load module including the physical identifier 52 and the replacement flag 53 that is incremented for each replacement instruction is filed by the logical identifier 51, and for each replacement instruction of the load module 60. Replacement instruction switch 55 to be advanced
Is updated, and the physical identifier corresponding to the logical identifier in the program management file is updated based on the logical identifier 51 to be replaced and the physical identifier of the modified load module 60b. flag
A module replacement instruction processing unit 17 that advances the value of the exchange instruction switch 55 while stepping 53, and a load control area LCA and an exchange instruction switch area 23 are secured on the main memory at the time of online opening, and program management is performed. All the load information 50 in the file is transcribed to the load control area LCA, and the entry point address data area representing the load destination is secured and cleared, and the value of the exchange instruction switch 55 is read out from the exchange instruction file 22. Exchange instruction switch area
23, an open processing unit 18 that transcribes the input telegram, the business process management unit 12 that notifies the start of the business process at the time of starting the business process, and a value of the exchange instruction switch area 23 and the exchange instruction based on the notification. The contents of the file 22 are compared with the contents of the file 22. If the contents match, it is determined that replacement is necessary.
Necessity determining unit 19 for replacing the data with the load information 50 of the program management file 15 and the load control area LC
Compare the replacement flag of the load information 50a transcribed to A, extract the mismatched load information 50 from the program management file 15, replace it with the corresponding load information 50a of the load control area LCA, and enter the entry of the load information 50a. A replacement processing unit 20 for clearing the point address data 54a; and a load control area when a call request is made by the business processing management unit.
Referring to the LCA load information 50a, if the entry point address data 54a of the load module is set, the control is transferred to the entry point address, and if not set, the physical identifier 52a corresponding to the specified logical identifier is set. Entry point address data 54 notified by loading the load module
Call processing unit 21 that performs a call process for setting a and transferring control
It comprises so that it may have.

(Operation)

When the business process management unit 12 receives the input message and starts the specified business process, prior to calling the load module,
The start of the business process (hereinafter referred to as the head of the transaction) is notified to the replacement necessity determination unit 19. Thereby, the replacement necessity determination unit 19 compares the value of the replacement instruction switch 55 of the replacement instruction file 22 with the value of the replacement instruction switch 55a transcribed in the replacement instruction switch area 23 on the main memory,
It is determined whether or not there is a replacement instruction due to a match mismatch (when there is a mismatch, there is a replacement instruction, and at this time, the replacement instruction switch area 23 is replaced with the contents of the latest replacement instruction file 22). When there is no replacement instruction, the end of the replacement necessity determination processing is returned to the business process management unit 12, and the call processing unit 21 is requested to call the load module. Let it be replaced.

The replacement processing unit 20 matches the load information (referred to as 50a) transferred to the load control area with the load information 50 in the transfer source program management file according to the logical ID, and compares the load information 50 whose replacement flag 53 does not match. After extracting from the program management file 15 and replacing it with the corresponding load information 50a of the load control area, clearing the entry point address data of the load information 50a and setting it to the unloaded state, the business process management unit Notify 12.

When a call request for a load module is made from the business process management unit 12, the call processing unit 21 performs a call process with reference to the load information 50a transcribed on the main memory, but the replaced load information 50a Since the physical ID has been replaced with the physical ID of the modified load module 60b and the entry point address data has been cleared, the modified load module
60b will be loaded from the load module library.

As described above, by notifying the start of the process at the start of the business process, the preparation for replacing the load module is completed at that time, and the modified load module is loaded each time the process is called. Since the replacement process is not performed when the load module is called, it is possible to prevent the new and old load modules from being replaced in the same process.

〔Example〕

 An embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram of the online processing unit of the embodiment, and FIG.
FIG. 4 is a diagram for explaining a module replacement instruction process, FIG. 4 is a diagram for explaining the contents of an LCA, FIG. 5 is a flowchart for an open process, FIG. 6 is a flowchart for a close process, FIG. FIG. 8 is a flowchart (No. 2) of a calling process.

FIG. 2 shows an open processing unit 18 and a close processing unit 24 as a set of a program management unit 14, in addition to the replacement necessity determination unit 19, the call processing unit 21, and the replacement processing unit 20 shown in FIG. This is an example in which the program manager 14 is requested to call all load modules.

The file information (load information 50a) transcribed on the main memory is distinguished by adding a subscript a. In the figure, reference numeral 11 denotes a main control unit, which instructs a program management unit 14 to perform an open process at the time of online opening, receives input data based on a read request of an online terminal after the open process, and executes a corresponding business process management unit 12 To request a predetermined business process, and respond to the online terminal with the processing result.

Reference numeral 12 denotes a business process management unit that checks input data of the online terminal, sequentially calls load modules 60 corresponding to predetermined processes, and returns to the main control unit 11 together with the processing results. Prior to the start of the business process, the start of the business process is determined by the program management unit 14 using the second parameter.
When a CALL request (permission) is returned from the program management unit 14 after the end of the replacement necessity determination process or after the completion of the replacement process, the load module is called with the first parameter (notifying the logical ID) thereafter. Do. It is a load module as a subprogram, and performs a predetermined process by calling the subprogram.

Reference numeral 60b denotes a modified load module 14 for the load module 60 to be replaced. A program management unit includes an open processing unit 18, a replacement necessity determination unit 19, a replacement processing unit 20, a call processing unit 21, and a close processing unit 24.

Reference numeral 18 denotes an open processing unit which, when an open processing instruction is given from the main control unit 11, loads the load control area LCA on the main memory.
16 and the exchange instruction switch area 23 are secured, and the contents of the program management file 15 and the exchange instruction file 22 are transcribed, respectively.

Reference numeral 19 denotes a replacement necessity determining unit that analyzes the second parameter 71 when a call is requested and determines whether or not replacement is required. Reference numeral 20 denotes a replacement processing unit, which is replaced when the replacement necessity determination unit 19 determines that replacement is necessary. The transfer instruction switch 55 is transcribed from the instruction file 22 to the replacement instruction switch area 23, and is compared with the old replacement instruction switch 55a held up to that time. At the same time, when there is a replacement instruction, all the load information in the program management file 15 and the load control area LCA 16 are matched, and all the load information in which the replacement flags 53 and 53a do not match is transferred to the load control area LCA 16 and replaced.

Reference numeral 21 denotes a call processing unit which performs a call process described later based on the logical ID 51.

Reference numeral 21 denotes a close processing unit. Reference numeral 15 denotes a program management file. As shown in FIG. 3, a physical ID 52 based on a logical ID 51, a plurality of bits, and a replacement flag 53 which is counted up (incremented) for each replacement instruction, Load information 50 composed of entry point address data 54 on the main memory is filed, and is filed in an external storage device (not shown). The entry point address data 54 is an initial value (no setting) Is stored.

16 is a load control area LCA provided on the main memory,
As shown in FIG. 4, an area of a predetermined number of bytes is allocated for each logical ID 51, and the corresponding load information 50a is stored.

Reference numeral 17 denotes a module replacement instruction processing unit, which is a modified load module created and registered in the load module library.
Based on the physical ID 52b of 60b and the logical ID 51 to be replaced, the physical ID 52 of the corresponding load information of the program management file 15 is replaced to advance the replacement flag 53, and the replacement instruction switch 55 of the replacement instruction file 22 is switched (+1). I do.

Reference numeral 22 denotes an exchange instruction file which stores an exchange instruction switch 55 of a plurality of bits, and advances by each exchange instruction.

Reference numeral 23 denotes an exchange instruction switch area provided on the main memory.

The caller loads the load module 60 to the program management unit 14.
When requesting a call, the logical ID as the first parameter
The request 51 is passed as the second parameter to the program management unit 14 as data representing whether the transaction is at the head of the transaction.

The following operation is performed in the online processing unit configured as described above.

(Replacement instruction processing) See FIG. 3. (1) The correction source program is compiled and generated as the correction load module 60b, and is registered in the load module library together with the physical ID 52b.

(2) When a logical ID 51 and a physical ID 52b to be replaced are specified by a terminal (not shown), the module replacement instruction processing unit 1
7 increments the exchange instruction switch 55 of the exchange instruction file 22, exchanges the physical ID of the program management file 15 corresponding to the logical ID 51 to be exchanged with the physical ID 52b of the modified load module 60b, and sets the exchange flag 53 Proceed.

 The above replacement instruction is performed during online.

(Open processing) See FIG. 5 At the time of opening online, the open processing unit 18 receiving the open processing instruction secures the load control area LCA 16 and the replacement instruction switch area 23 in the main memory, and the contents of the program management file 15 and The contents of the replacement instruction file 22 are transcribed respectively.

The entry point address data 54a and the replacement flag 53a of the transcribed load information 50a on the main memory are initialized to "0".

(Replacement necessity determination) FIG. 7 (a) When the call request is received, the input second parameter is checked, and if the data indicating the head of the transaction is set, the replacement processing unit 19 performs the replacement processing. Instruct, if not set, do nothing
In response to the CALL request, the call processing unit 21 is called.

(Replacement processing) Fig. 7 (b) (1) Replacement instruction switch area when replacement is required
The content of 23 is saved in another area, and the exchange instruction switch 55 of the exchange instruction file 22 is transferred to the exchange instruction switch area 23.

(2) Subsequently, the old and new exchange instruction switches 55 and 55a are compared, and if they match, it is determined that there is no exchange instruction, and if they do not match, it is determined that there is an exchange instruction.

As described above, even if the replacement instruction is given at an arbitrary time during the online operation, the replacement instruction is detected at the start of the business, and the replacement processing unit 20 performs the following replacement processing.

(3) When there is a replacement instruction, the program management file 15 is sequentially read, the corresponding load information 50a in the load control area LCA 16 is compared, and all the load information 50 whose replacement flags 53, 53a do not match are extracted. Replace with the load information 50a of the load control area LCA16. At this time, the entry point address data 54a of the replaced load information 50a is cleared.

As described above, all the load information 50a corresponding to the modified load module 60b has the physical ID stored therein and the entry point address data cleared, and the modified load module is loaded and operated by the next call. become.

(Call processing) FIG. 8 (1) Call processing is performed with reference to the load control area LCA16. FIG. 8 (c) That is, the load information 50a corresponding to the designated logical ID 51
If the entry point address data 54a has been set, the control is transferred to that address. (D) If the entry point address data 54a has not been set (clear), the physical ID 52a is specified and loaded into the operating system OS. After requesting and setting the notified entry point address data in the load information 52a, the control is transferred to that address. (E) As a result, all the load information 50 corresponding to the logical IDs 52 whose replacement flags 53 do not match are transferred to the load control area LCA 16, and the entry point address data 54a is not set. Is loaded and called.

(Close Processing) The load control area LCA 16 and the replacement instruction switch area 23 are opened based on the close processing instruction instructed at the time of online closing.

As described above, since the above-described replacement processing is performed only when the caller determines that the caller is the head of the transaction by analyzing the second parameter set by the caller, it is possible to prevent the same transaction from calling the load module before and after the replacement. .

〔The invention's effect〕

According to the present invention, in a system in which a program management file in which a logical ID, a physical ID, and an exchange flag are associated with each other is loaded into a main memory and a call process is performed, a parameter is provided at the time of a call request to notify whether or not the start of a transaction is present. Since the load module replacement process is performed only when it is determined to be the head, there is a great effect that the load modules before and after the replacement can be prevented from being called by the same process.

[Brief description of the drawings]

 FIG. 1 is a diagram for explaining the principle of the present invention, FIG. 2 is a block diagram of an online processing unit of the embodiment, FIG. 3 is a diagram for explaining module replacement processing, FIG. 4 is a diagram for explaining the contents of LCA, and FIG. FIG. 6 is a flowchart of a closing process, FIG. 7 is a flowchart of a calling process (No. 1), FIG. 8 is a flowchart of a calling process (No. 2), and FIG. ,. In the figure, 11 is a main control unit, 12 is a business process management unit, 14 is a program management unit, 15 is a program management file, 16 is a load control area LCA, 17 is a replacement instruction processing unit, 18 is an open processing unit, 19 is A replacement necessity determining unit, 20 is a replacement processing unit, 21 is a call processing unit, 24 is a close processing unit, 22 is a replacement instruction file, 23 is a replacement instruction switch area, 50 and 50a are load information, 51 is logical identifier data, Logical ID, 52, 52a are physical identifier data, physical ID, 52b is physical ID of modified load module, 53, 53a is replacement flag, 54, 54a is entry point address data, 55, 55a is replacement instruction switch, 60 is load The module, 60b is the modified load module, 70 is the first parameter, 71 is the second parameter.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-56728 (JP, A) JP-A-1-113831 (JP, A) The Institute of Electronics, Information and Communication Engineers, 1987 Conference Lecture Textbook, Volume 2: PART2 ”(JPO, October 20, 1987) p. 2-203-2-204 (58) Field surveyed (Int.Cl. ⁶ , DB name) G06F 9/06, 9/445, 9/40, 9/42, 15/00

Claims (1)

(57) [Claims] An online processing apparatus having a business processing management unit for analyzing an input message, sequentially calling a predetermined load module and performing a requested business processing, is registered in a load module library based on a physical identifier,
A load module exchanging device for exchanging a load module to be called and loaded on a main memory with a modified load module during online establishment, wherein each load includes a physical identifier and an exchange flag stepped by an exchange instruction. A program management file in which module load information is filed by a logical identifier; a replacement instruction file in which a replacement instruction switch that is stepped up for each load module replacement instruction is stored; a logical identifier of the specified replacement target; A module replacement instruction processing unit that updates a physical identifier corresponding to a corresponding logical identifier in the program management file based on the physical identifier of the module, increases a replacement flag, and increases a value of the replacement instruction switch. When opening online, replace with load control area on main memory An instruction switch area is secured, all the load information in the program management file is transferred to the load control area, and an entry point address data area indicating the load destination is secured and cleared, and the replacement instruction file is deleted from the replacement instruction file. An open processing unit that reads the value of a replacement instruction switch and transfers the value to the replacement instruction switch area, analyzes the input telegram, notifies the business processing start at the time of starting the business processing, and the business processing management unit; The value of the exchange instruction switch area is compared with the contents of the exchange instruction file. If the values match, it is determined that the exchange is not to be performed. If the values do not match, it is determined that the exchange is required. A necessity / unnecessity judging unit, and in the case of replacement, the load information of the program management file and the load information transferred to the load control area. A replacement processing unit that compares the replacement flag of the load control area, extracts the mismatched load information from the program management file, replaces the load information with the corresponding load information of the load control area, and clears the entry point address data of the load information; When a call request is made by the business process management unit, the load information of the load control area is referred to, and if entry point address data of the load module is set, the control is transferred to the entry point address and the entry is set. If not, a call processing unit for loading the load module based on the physical identifier corresponding to the specified logical identifier, performing a call process for setting the notified entry point address data and transferring control, and To determine whether the load module needs to be replaced, replace only the load information instructed to be replaced, and enter the entry point address. A load module replacing device which clears data and loads and replaces a modified load module at the time of calling.