JPH08212163A - System for detecting program loop spread over transactions - Google Patents

Abstract

PURPOSE: To detect a program loop spread over transactions by the malfunction of an application program while using a derived level value. CONSTITUTION: A reception processing means 13 for a transaction 12 receives a transaction starting message transmitted from a message transmitter 1, extracts the derived level value from its level value storage part and preserves that level value in a level value storage area 14. When it is necessary to derivatively start the same transaction 12, a program loop suppressing means 15 is activated and when the derivation level value in the level value storage area 14 is larger than an upper limit value, error processing is performed but when that level value is less than the upper limit value, a transmission processing means 16 is activated. The transmission processing means 16 updates the derivation level value extracted from the level value storage area 14, sets that level value to a level value storage part in the transaction starting message and transmits that message. Thus, the same transaction 12 is derivatively activated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an online transaction processing system, and in particular, the same transaction is successively derived from a transaction started by a transaction start message sent from a message sending device such as a terminal or a computer system. The present invention relates to a method of detecting a program loop that crosses transactions in an online transaction processing system that completes a series of processes by being activated by.

[0002]

2. Description of the Related Art Conventionally, in this type of online transaction processing system, measures have been taken to detect a program loop in each activated transaction, but the same transaction is successively generated due to a malfunction of an application program. When a program loop that crosses transactions such as going is generated, there is no means to detect this and it is necessary to take measures such as stopping the system.

[0003]

In the above-described conventional online transaction processing system, when a program loop that crosses transactions occurs such that the same transaction is successively derived due to a malfunction of an application program, Since the trigger to stop the transaction could not be found, each resource of the online transaction processing system continues to be under a heavy load, which may cause a situation in which the processing capacity of the online transaction processing system decreases. was there.

In view of the above points, an object of the present invention is to make a malfunction of an application program by using a derived level value indicating how many levels (levels) the own transaction is derived from the originating transaction. It is to provide a method for detecting a program loop that crosses transactions, which enables the detection of a program loop that crosses transactions.

[0005]

According to the method of detecting a program loop that crosses transactions of the present invention, the same transaction is successively output from a transaction started by a transaction start message sent from a message sending device. In an online transaction processing system that completes a series of processes by being derived and activated, a transaction activation message including a level value storage unit that stores a derivation level value; and a level value storage that receives this transaction activation message. It is activated when it is necessary to derive and activate the same transaction as the reception processing means for extracting the derived level value from the section and storing it in the level value storage area, and the derived level value in the level value storage area is the upper limit value. When the above A program loop inhibiting means for performing processing, and a derivative level extracted from the level value storage area, activated when the program loop inhibiting means determines that the derived level value in the level value storage area is less than the upper limit value. And a transmission processing means for updating the value, setting it in the level value storage unit in the transaction start message, and transmitting the transaction start message.

[0006]

In the method of detecting a program loop spanning transactions according to the present invention, the transaction activation message includes a level value storage unit for storing the derived level value, and the reception processing means receives the transaction activation message and receives the level value. Derived level values are fetched from the storage unit and stored in the level value storage area, and the program loop suppression means that is activated when it is necessary to derive and activate the same transaction has an upper limit of the derived level value in the level value storage area. If the value is greater than or equal to the value, error processing is performed, and the derivative level extracted from the level value storage area by the transmission processing means activated when the program loop suppression means determines that the derived level value in the level value storage area is less than the upper limit value. Update the value and set it in the level value storage in the transaction start message To send a transaction start-up message.

[0007]

The present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the structure of a program loop detecting method for crossing transactions according to an embodiment of the present invention. The method of detecting a program loop that crosses transactions according to the present embodiment is performed by a message transmission device 11 including a terminal, a computer system, or the like, which is a transmission source of the transaction activation message 20 (see FIG. 2), and a message transmission device 11. The main part is composed of the transaction 12 activated by the transaction activation message 20. The transaction 12 operates on a host computer (not shown).

The transaction 12 is the reception processing means 1
3, a level value storage area 14, a program loop inhibiting means 15, and a transmission processing means 16.

Referring to FIG. 2, the transaction start message 20 includes a level value storage section 21 in addition to fields for storing data required for transaction processing.
Is provided.

Referring to FIG. 3, the processing procedure of the reception processing means 13 includes a transaction activation message reception step 31, a derived level value extraction step 32, and a derived level value storage step 33.

Referring to FIG. 4, the processing procedure of the program loop inhibiting means 15 is as follows:
1, a derivative level value / upper limit value comparing step 42, a transmission processing means starting step 43, and an error processing step 44.
Consists of

Referring to FIG. 5, the processing procedure of the transmission processing means 16 includes a derivative level value extraction step 51, a derivative level value addition and setting step 52, and a transaction activation message transmission step 53.

Next, the operation of the program loop detection method of straddling the transactions of this embodiment having the above-mentioned configuration will be described.

When the transaction activation message 20 is transmitted from the message transmission device 11 (or the transaction 12) to activate the transaction 12, in the transaction 12 activated by the transaction activation message 20, the reception processing means 13 causes the reception processing means 13 to perform the transaction activation message. 20 reception processing is performed.

Specifically, the reception processing means 13 receives the transaction activation message 20 from the message transmission device 11 (or the transaction 12) (step 31), and derives the derived level value from the level value storage unit 21 in the transaction activation message 20. X is taken out (step 32), and this derived level value X is stored in the level value storage area 1
4 (step 33).

When the main processing (not shown) by the transaction 12 is performed and it is necessary to newly derive and activate the same transaction 12, the program loop inhibiting means 15 is activated first.

The activated program loop inhibiting means 15
Determines whether the transaction 12 can newly activate the same transaction 12.

More specifically, the program loop inhibiting means 15
Derives the derived level value X from the level value storage area 14 (step 41) and determines whether or not the derived derivative level value X is not less than the upper limit value Xmax of the derived level value (step 42). Derivation level value X is upper limit value Xmax
If it is less than the above, the program loop inhibiting means 15 activates the transmission processing means 16 (step 43). On the other hand, if the derivation level value X is not less than the upper limit value Xmax, the program loop inhibiting means 15 performs error processing (step 44) and ends the processing. As a result, the new identical transaction 12 is not activated.

The activated transmission processing means 16 transmits the transaction activation message 20.

More specifically, the transmission processing means 16 fetches the derived level value X stored in the level value storage area 14 (step 51), adds 1 to the fetched derived level value X, and outputs the transaction start message 20. Is set in the level value storage unit 21 (step 52) and the transaction activation message 20 is transmitted (step 5).
3). As a result, the same transaction 12 is newly activated.

FIG. 6 shows a case where the transaction 12A started by the transaction start message 20-1 from the message sending device 11 is used as a starting point and the upper limit value Xmax of the derivative level value X of the started transaction 12 is set up to twice. The operation of is illustrated. The specific operation will be described below with reference to FIG.

When the message transmitter 11 sets the derivative level value "0" in the level value storage section 21 of the transaction activation message 20-1 and transmits it, the transaction 12A activated by the transaction activation message 20-1 , The reception processing means 13A
Upon receiving the transaction processing message 20-1,
The derived level value “0” is retrieved from the level value storage unit 21 in the transaction processing message 20-1, and the derived level value “0” is stored in the level value storage area 14A.

When the starting transaction 12A needs to newly activate the same transaction 12B, the program loop inhibiting means 15A is activated.

The program loop inhibiting means 15A compares the derived level value "0" of the level value storage area 14A with the upper limit value "2", and the derived level value "0" is the upper limit value "2".
Therefore, the transmission processing means 16A is activated.

The transmission processing means 16A uses the derived level value "1" obtained by adding "1" to the derived level value "0" fetched from the level value storage area 14A, in the level value storage unit 21 in the transaction activation message 20-2. Set to
The transaction activation message 20-2 is transmitted.

Transaction activation message 20-2
In the transaction 12B activated by, the reception processing means 13B causes the transaction activation message 20
-2 is received and the transaction start message 20-
The derived level value "1" is taken out from the level value storage unit 21 in 2 and the derived level value "1" is stored in the level value storage area 14B.

When the starting transaction 12A needs to newly activate the same transaction 12C, the program loop inhibiting means 15A is also activated.

The program loop inhibiting means 15A compares the derived level value "0" of the level value storage area 14A with the upper limit value "2", and the derived level value "0" is the upper limit value "2".
Therefore, the transmission processing means 16A is activated.

The transmission processing means 16A sets the derived level value "1" obtained by adding "1" to the derived level value "0" fetched from the level value storage area 14A, in the level value storage unit 21 in the transaction activation message 20-3. Set to
The transaction activation message 20-3 is transmitted.

Transaction activation message 20-3
In the transaction 12C activated by, the reception processing means 13C causes the transaction activation message 20
-3 is received and the transaction start message 20-
The derived level value "1" is taken out from the level value storage unit 21 in 3 and the derived level value "1" is stored in the level value storage area 14C.

From the above, the transaction 12 of the starting point
The derivation level values of the transactions 12B and 12C derived and activated from A are all "1", and it can be seen that these transactions 12B and 12C are derived from the transaction 12A at the first stage (level).

Next, when the transaction 12B needs to newly activate the same transaction 12D, the program loop inhibiting means 15B is activated.

The program loop inhibiting means 15B compares the derived level value "1" of the level value storage area 14B with the upper limit value "2", and the derived level value "1" has not reached the upper limit value "2". Therefore, the transmission processing means 16B is activated.

The transmission processing means 16B sets the derived level value "2" obtained by adding "1" to the derived level value "1" fetched from the level value storage area 14B, in the level value storage unit 21 in the transaction activation message 20-4. Set to
The transaction activation message 20-4 is transmitted.

Transaction activation message 20-4
In the transaction 12D activated by, the reception processing means 13D causes the transaction activation message 20
-4 is received and the transaction start message 20-
The derived level value "2" is taken out from the level value storage unit 21 of 4 and the derived level value "2" is stored in the level value storage area 14D. This allows transaction 12
It can be seen that D is derived from the transaction 12A at the starting point in the second stage (level).

Further, when it becomes necessary for the transaction 12D to newly activate the same transaction 12, the program loop inhibiting means 15D causes the derived level value "2" and the upper limit value "2" of the level value storage area 14D.
And the two are the same, it is determined that the transaction activation message 20 cannot be transmitted any more, and the error processing is performed without activating the transmission processing means 16.

Therefore, the transaction 12 will not be activated beyond the upper limit value "2" of the derivation level value, and the program loop that crosses the transactions due to the malfunction of the application program will be eliminated.

In the above embodiment, the initial value "0" of the derived level value is set in the level value storage 21 in the transaction activation message 20 sent from the message sending device 11, and the sending processing means 16 sends the derived level. Although the values are added one by one, various modifications are possible such that the initial value of the derived level value is a positive integer and the derived processing level 16 is subtracted by one. Needless to say.

[0040]

As described above, according to the present invention, the level value storage section is provided in the transaction start message, and the transmission processing is performed by the program loop inhibiting means during the transaction based on the derived level value set in the level value storage section. By determining whether to activate the means, it is possible to automatically detect and eliminate a program loop that crosses transactions due to a malfunction of the application program, and minimize the waste of each resource of the online transaction processing system. Therefore, there is an effect that it is possible to suppress the influence on the entire system such as a decrease in the processing capacity of the online transaction processing system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a program loop detection method across transactions according to an embodiment of the present invention.

FIG. 2 is a diagram showing a format of a transaction activation message in the method of detecting a program loop across transactions according to the present embodiment.

FIG. 3 is a flow chart showing a processing procedure of a reception processing means in FIG.

FIG. 4 is a flowchart showing a processing procedure of a program loop inhibiting means in FIG.

5 is a flowchart showing a processing procedure of a transmission processing means in FIG.

FIG. 6 is a diagram showing an operation example of a method of detecting a program loop across transactions according to the present embodiment.

[Explanation of symbols]

11 message sending device 12, 12A to 12D transaction 13, 13A to 13D reception processing means 14, 14A to 14D level value storage area 15, 15A to 15D program loop suppressing means 16, 16A, 16B transmission processing means 20, 20-1 to 20 20-4 Transaction Activation Message 21 Level Value Storage

Claims (2)

[Claims] 1. An online transaction processing system for completing a series of processes by successively deriving and activating the same transaction starting from a transaction activated by a transaction activation message transmitted from a message transmission device, A transaction start message having a level value storage unit for storing the derived level value; reception processing means for receiving the transaction start message, extracting the derived level value from the level value storage unit, and storing it in the level value storage area; A program loop inhibiting means that is activated when it is necessary to derive and activate the same transaction and that performs error processing when the derived level value in the level value storage area is equal to or higher than the upper limit value, and the program loop inhibiting means. It is activated when it is determined that the derived level value of the level value storage area is less than the upper limit value, and the derived level value fetched from the level value storage area is updated and set in the level value storage section in the transaction activation message. And a transmission processing means for transmitting the transaction activation message, and a method for detecting a program loop across transactions. 2. The initial value of the derived level value is set in the level value storage section in the transaction activation message sent from the message sending device, and the derived level value is incremented by 1 by the transmission processing means. Program loop detection method that spans the listed transactions.