JP2555920B2 - Online real-time processor - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is used in computers. In particular, it relates to a technique for changing and maintaining a subprogram of a computer that performs online real-time processing.

[0002]

2. Description of the Related Art On-line real-time processing on a computer, due to a bug in a subprogram,
When replacing a plurality of subprograms, the operator updates the subprogram in the load module library and replaces it with the current subprogram. At this time,
After blocking all transactions related to the subprogram to be replaced, it is necessary to cancel the pre-update subprogram loaded on the virtual memory to release the transaction blocking.

[0003]

However, in such a procedure, it takes time and effort to close the transaction and release the close after the replacement is completed. Also, when a large number of transactions occur during online real-time processing, the transaction is closed. It cannot be done immediately and there is a problem in the responsiveness of business application maintenance.

The present invention has been made against such a background, and when trouble occurs in the application program during the operation of the online real-time processing apparatus,
It is an object of the present invention to provide an online real-time processing device capable of dynamically replacing a plurality of subprograms at the same time without stopping a transaction.

[0005]

According to the present invention, there is provided a transaction processing program section for storing and executing a plurality of transaction processing programs, a subprogram calling section accessed by the transaction processing program section, and this subprogram calling section. And a load module library in which a plurality of subprograms to be called are stored, and a subprogram entry including a first subprogram entry point pointer corresponding to each of the plurality of subprograms and indicating the subprogram name and entry point information. Is an online real-time processing device having a sub-program management table in which is stored.

A feature of the present invention is that the subprogram entry has a second subprogram entry point pointer in which entry point information of an alternative subprogram to be replaced with the subprogram is registered. Replacement in which one of the first subprogram entry point pointer and the second subprogram entry point pointer is set as a called subprogram entry point pointer for the subprogram calling unit and the other is set as a non-call subprogram entry point pointer An area in which a flag is written is provided, an area in which the alternative subprogram is programmed is provided in the load module library, a subprogram to be replaced and input means for designating the alternative subprogram, and the replaced subprogram. Subprogram name of subprogram and its alternative A subprogram substitution table in which the subprogram name of the program is registered, and a substitution subprogram registration unit for registering the subprogram name to be replaced and its alternative subprogram name in accordance with the input of the input means in the subprogram substitution table. , A subprogram replacement unit that accesses the subprogram entry, the subprogram replacement table, and the load module library to execute replacement of the replaced subprogram.

The subprogram replacing unit reads out the subprogram name to be replaced and its substitute subprogram name from the subprogram replacement table, and the subprogram corresponding to the substitute subprogram name read from the reading unit. From the load module library, means for extracting entry point information corresponding to the replaced subprogram name read from the reading means from the subprogram entry, and a means for extracting the entry point information from the loaded alternative subprogram. Means for extracting entry point information, means for registering the entry point information of the alternative subprogram in the non-call subprogram entry point pointer of the subprogram entry corresponding to the replaced subprogram, and the replaced subprogram name Invert the value of the replacement flag corresponding to It is desirable and means.

[0008]

The subprogram calling unit refers to the subprogram management table to call the subprogram requested by the transaction processing program from the load module library.

When it is necessary to replace the subprogram for the purpose of changing or maintaining the subprogram, the operator registers the subprogram name to be replaced and the alternative subprogram name in the subprogram replacement table via the terminal device. To do. Further, when the operator inputs a replacement request command via the terminal device, the subprogram replacement unit is activated.

The subprogram replacement unit reads out the replaced subprogram name and its substitute subprogram name from the subprogram replacement table, and searches the entry point of the replaced subprogram from the subprogram entry of the subprogram management table. At the same time, the alternate subprogram is searched and loaded from the load module library by referring to the alternate subprogram name.

Information of the subprogram entry point extracted from the loaded alternative subprogram is registered in the entry of the replaced subprogram that has been searched. At this time, similarly, the replacement flag included in the subprogram entry is also referred to, and the extracted subprogram entry point information is registered in the subprogram entry point pointer of the non-calling pointed to by the replacement flag, that is, the subprogram entry point pointer currently in suspension.

After executing the above procedure for all the replaced subprograms registered in the subprogram replacement table, the subprogram replacement unit again reads the replaced subprogram names from the subprogram replacement table, and the subprograms are read for each. The replacement flag is inverted by referring to the management table. That is, if the replacement flag is "ON", it is set to "OFF", and if it is "OFF", it is set to "ON". At this point, the current subprogram and the alternative subprogram are reversed and the replacement is completed.

With this, a plurality of subprograms can be dynamically replaced at the same time without stopping transactions even while the online real-time processing apparatus is in operation.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

According to the present invention, a transaction processing program section 8 which stores and executes a plurality of transaction processing programs 81 to 8n, and a subprogram calling section 9 which is accessed by the transaction processing program section 8
And a load module library 22 in which a plurality of subprograms called by the subprogram calling unit 9 are stored, and a first sub that respectively corresponds to the plurality of subprograms and indicates the subprogram name and the entry point information. The online real-time processing device 1 is provided with a subprogram management table 6 in which a subprogram entry 7 including a subprogram entry point pointer 73 which is a program entry point pointer is stored.

Here, a feature of the present invention is that the subprogram entry 7 is a second subprogram entry point pointer in which entry point information of an alternative subprogram to be replaced with the subprogram is registered. Program entry point pointer 74, subprogram entry point pointer 73, and subprogram entry point pointer 74
The load module library 22 is provided with an area in which a replacement flag 71 for setting the called subprogram entry point pointer to the subprogram calling section 9 as one and the other one as the non-call subprogram entry point pointer is written. An area is provided in which the alternative subprogram is programmed, and the terminal device 2 is provided as an input means for designating the replaced subprogram and the alternative subprogram.
And a subprogram replacement table 4 in which the subprogram name of this replaced subprogram and the subprogram name of its alternative subprogram are registered, and the replaced subprogram according to the input of the terminal device 2 in this subprogram replacement table 4. Name and its substitute subprogram name, a subprogram registration section 3, a subprogram entry 7 and a subprogram substitution table 4
And a subprogram replacement unit 5 that accesses the load module library 22 and executes the replacement of the replaced subprogram.

The subprogram replacement unit 5 reads the replaced subprogram name and its substitute subprogram name from the subprogram replacement table 4, and the subprogram corresponding to the substitute subprogram name read from the read unit. From a means for loading a program from the load module library 22, a means for extracting entry point information corresponding to the replaced subprogram name read from the reading means from a subprogram entry 7, and a means for loading the substitute subprogram. Means for extracting the entry point information, means for registering the entry point information of the alternative subprogram in the non-call subprogram entry point pointer of the subprogram entry 7 corresponding to the replaced subprogram, and the replaced subprogram Invert the value of the replacement flag 71 corresponding to the name A configuration that includes a means.

Next, the operation of the embodiment of the present invention will be described with reference to FIG. FIG. 2 is a flowchart showing a subprogram calling procedure. In FIG. 2, SP means a subprogram. The subprogram calling unit 9 operates when the transaction processing programs 81 to 8n request a subprogram, and refers to the subprogram management table 6 to call the corresponding subprogram from the load module library 22.

The subprogram calling unit 9 retrieves the corresponding subprogram entry 7 from the subprogram management table 6 by the designated subprogram name and the subprogram name file 72 (111).

When the replacement flag 71 is "OFF",
The subprogram 101 indicated by the subprogram entry point pointer 73 is called (114), and the replacement flag 7
When 1 is "ON", the subprogram 102 indicated by the subprogram entry point pointer 74 is called (115).

By the above operation, the subprogram calling unit 9 calls the subprogram managed by the subprogram management table 6 by the transaction processing program 8.
It is performed according to the requirements of 1 to 8n.

Next, the operation of the subprogram replacement unit 5 will be described with reference to FIGS. 3 and 4. 3 and 4 are flowcharts showing the operation of the subprogram replacement unit 5. In FIGS. 3 and 4, SP means a subprogram. The subprogram replacement unit 5 reads the replaced subprogram name and its alternative subprogram name registered in advance in the subprogram replacement table 4 by an operation command from the terminal device 2 (20
1). The replacement subprogram name and the subprogram name file 72 thus read are searched for the corresponding subprogram entry 7 in the subprogram management table 6 (202).

The subprogram replacement unit 5 loads the alternative subprogram of the replaced subprogram preprogrammed in the load module library 22 by referring to the alternative subprogram name read from the subprogram replacement table 4, and loads it. The entry point information is extracted (203).

The subprogram replacement unit 5 has a replacement flag 7
1 (204), and when the replacement flag 71 is "OFF", the entry point information of the extracted alternative subprogram is registered in the subprogram entry point pointer 74 (206),
When the replacement flag 71 is "ON", the entry point information of the extracted alternative subprogram is registered in the subprogram entry point pointer 73 (207).

The subprogram replacement unit 5 refers to the subprogram replacement table 4 (208), determines whether the replaced subprogram name is further registered, and if it is registered (209), the subprogram replacement table again. The sub-program to be replaced, which is registered from No. 4, is read (201).

If not registered (209), the entry point information of the substitute subprogram for all the subprograms to be replaced registered in the subprogram replacement table 4 and the registration in the subprogram entry 7 are completed.

Next, as shown in FIG. 4, the subprogram replacement unit 5 reads the replaced subprogram name from the subprogram replacement table 4 again (210), and obtains the replaced subprogram name and subprogram name file. 72
Then, the corresponding subprogram entry 7 is searched from the subprogram management table 6 (211).

The replacement flag 71 of the subprogram entry 7 is referred to (212), and the replacement flag 71 is "ON".
(213), the replacement flag is switched to "OFF" (214), and when the replacement flag 71 is "ON" (2)
13) Switch the replacement flag to "OFF" (21
5).

The subprogram replacement unit 5 refers to the subprogram replacement table 4 (216), determines whether the subprogram name to be replaced is further registered, and if it is registered, the subprogram replacement table 4 stores the corresponding subprogram name. The replacement subprogram name is read (217). If not registered, all replacements are complete.

Next, the operation of the dynamic substituting method of a plurality of subprograms in the online real-time processing apparatus 1 of the embodiment of the present invention thus configured will be described.
Before sub-program replacement, sub-programs to replace all sub-programs to be replaced are created in the load module library 22 in advance. (1) First, while the online real-time processing apparatus 1 is operating, the transaction processing programs 81 to 8n set the replacement flag 71 by the sub-program calling unit 9 before the sub-program replacement request command is issued from the terminal device 2. Therefore, the subprogram is called from the load module library 22. (2) When the terminal device 2 issues a registration request for a subprogram to be replaced, the replacement subprogram registration unit 3 registers the replacement subprogram name in the subprogram replacement table 4. (3) When the terminal device 2 issues a subprogram replacement request command, the subprogram replacement unit 5 executes the following processing.

For all the replaced subprograms registered in the subprogram replacement table 4, the alternative subprograms are loaded from the load module library 22, and the entry point information of the extracted alternative subprograms is replaced with the replacement flag of the corresponding subprogram entry 7. 71, if the replacement flag 71 is ON, the sub-program entry point pointer 73 is turned to the sub-program entry point pointer 74
Register with. For all the replaced subprograms registered in the subprogram replacement table 4, the replacement flag 71 of the corresponding subprogram entry 7 is changed from ON to OFF or OF.
Switch from F to ON. (4) After the subprogram replacement request command is issued, the subprogram calling unit 9 uses the replacement flag 71 of the corresponding subprogram entry 7 for all the replaced subprograms for which the replacement request has been issued. An alternative subprogram is called by the entry point pointer 73 or 74. After performing the above processing, all the replaced subprograms can be deleted from the load module library 22.

By the above procedure, a plurality of pre-registered subprograms can be dynamically replaced by a single operator command.

[0033]

As described above, according to the present invention, a plurality of subprograms can be dynamically replaced at the same time without stopping a transaction when a trouble occurs in an application program while the online real-time processing device is operating.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of a subprogram calling unit.

FIG. 3 is a flowchart showing the operation of a subprogram replacement unit.

FIG. 4 is a flowchart showing the operation of a subprogram replacement unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Online real-time processing device 2 Terminal device 3 Replacement subprogram registration unit 4 Subprogram replacement table 5 Subprogram replacement unit 6 Subprogram management table 7 Subprogram entry 8 Transaction processing program unit 81-8n Transaction processing program 9 Subprogram calling unit 22 Load module library 71 Replacement flag 72 Subprogram name file 73 Subprogram entry point pointer 74 Subprogram entry point pointer 101, 102 Subprogram

Claims (2)

(57) [Claims] 1. A transaction processing program section for storing and executing a plurality of transaction processing programs, a subprogram calling section accessed by the transaction processing program section, and a plurality of subprograms called by the subprogram calling section. A submodule management table that stores a load module library that stores, and a subprogram entry that includes a first subprogram entry point pointer that corresponds to each of the plurality of subprograms and that indicates the subprogram name and entry point information thereof. In the online real-time processing device comprising: a subprogram entry, a second subprogram entry point pointer in which entry point information of an alternative subprogram to be replaced with the subprogram is registered; A substitution flag that sets one of the subprogram entry point pointer and one of the second subprogram entry point pointers as a called subprogram entry point pointer for the subprogram calling part and sets the other one as a non-call subprogram entry point pointer. Is provided in the load module library, and an area in which the alternative subprogram is programmed is provided in the load module library. The replaced subprogram and input means for designating the alternative subprogram and the replaced subprogram are provided. A subprogram replacement table in which the subprogram name of the program and the subprogram name of the alternative subprogram thereof are registered, and the replaced subprogram name and its alternative subprogram name are input to the subprogram replacement table according to the input of the input means. Register A sub-program replacement unit for executing replacement of the sub-program to be replaced by accessing the sub-program entry, the sub-program replacement table, and the load module library. Real-time processor. 2. The subprogram replacement unit corresponds to the means for reading out the replaced subprogram name and its alternative subprogram name from the subprogram replacement table, and the alternative subprogram name read from the reading means. Means for loading a subprogram from the load module library; means for extracting entry point information corresponding to the replaced subprogram name read from the reading means from the subprogram entry; and the loaded alternative subprogram Means for extracting the entry point information from the subprogram entry, and means for registering the entry point information of the alternative subprogram in the non-call subprogram entry point pointer of the subprogram entry corresponding to the subprogram to be replaced, Invert the value of the replacement flag corresponding to the program name The online real-time processing apparatus according to claim 1, further comprising: