JP2002082817A - Event notification system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently notify a plurality of systems needing different event data of events. SOLUTION: A system 2-1 prepares an XML document by putting the event data to be notified between the prescribed tags. The DTD analysis processing parts 9 of systems 2-2 to 2-n analyze the XML document from the system 2-1, extract all of the event data, and event generation processing parts 10 extract only event data needed by an application waiting for data reception out of the extracted event data and transfer the event data to the application.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an event notification system, and more particularly to an efficient event notification method from one system to a plurality of systems or an event notification system capable of promptly responding to a change in the configuration of event data. .

[0002]

2. Description of the Related Art Conventionally, when notifying an event from one system to a different system, a common method of notifying the contents of the event is CSV (Comma Separated Valuation).
ue) format files. When using the CSV format, the number of data, the arrangement order, and the type of data need to be matched on the event transmitting / receiving side.

Therefore, if the number, arrangement, and type of data to be transmitted and received in the entire network system are determined in advance, a single event notification file in CSV format can be transmitted from one system to a plurality of systems. Events can be notified at the same time.

[0004]

However, if it is desired to add and pass event data only to some of the event receiving systems among a plurality of existing systems, C
Conventionally, in the SV format, the number, arrangement, and type of data must be matched on the event transmitting / receiving side. The specification for receiving must be changed. Alternatively, the event transmitting system may include a plurality of Cs corresponding to each of the event receiving systems.
The specification must be changed to transmit the SV format file. As described above, if an event is notified using a file in the CSV format, it is not possible to quickly respond to a change in the configuration of the event data to be notified.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an event that can efficiently notify an event to a plurality of systems that require different event data. To provide a notification system.

[0006]

In order to achieve the above object, an event notification system according to the present invention provides an event notification system for notifying an event notification document transmitted from an event transmission system to an event reception system. In the system, the event transmitting system includes all event data that the operating transmitting application wants to transmit to each application operating on one or more of the event receiving systems, each being sandwiched by reserved words defined in the system. Event notification document creation processing means for creating an event notification document of a single document type definition file structure, the event receiving system,
An event data extraction processing means for extracting only the event data required by the operating receiving application by referring to the reserved word from the event notification document sent from the event transmitting system.

The event data extraction processing means extracts all event data described in the event notification document by referring to a reserved word. An event generation processing unit that extracts only event data required by an application operating in the system from the event data extracted by the processing unit and passes the event data to the application;

[0008] The event notification document is an XML document.

[0009]

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an event notification system according to the present invention. FIG. 1 shows a plurality of systems 2-1, 2-2, 2-n connected to the network 1. In the present embodiment, the system 2-1
Is the system on the event transmitting side, and the systems 2-2 to 2-2
Although -n will be described as a system on the event receiving side, each system 2-1 to 2-n can be any of the transmitting and receiving sides by providing necessary components for each of the transmitting and receiving sides.

The system 2-1 on the event transmitting side has an application execution unit 3, an XML document creation processing unit 4, and a communication processing unit 5. Application execution unit 3
Executes an application that transmits data to the receiving system. The XML document creation processing unit 4 is provided as an event notification document creation processing unit, and converts the data transmitted by the application into XML. Communication processing unit 5
Sends an XML document.

Event receiving side system 2-2 to 2-n
Has a communication processing unit 6, an event data extraction processing unit 7, and an application execution unit 8. Communication processing unit 6
Receives an XML document. The event data extraction processing unit 7 is provided as event data extraction processing means, and extracts only event data required by an operating application by referring to a tag that is a reserved word from a received XML document. DT contained inside
The D analysis processing unit 9 determines that the document structure is DTD (document type de
(finition: document type definition) The XML document which is a file is analyzed to extract all event data described in the XML document. The event generation processing unit 10 extracts only event data required by the application from the event data extracted by the DTD analysis processing unit 9 and passes the event data to the application. Application execution unit 8
Executes an application that executes a predetermined process by receiving the extracted event data.

A feature of the present embodiment is that XML (extensible markup lan) is used for data transfer between systems.
guage). Since XML adds a tag to data, the content of the data can be identified, and the tag name can be set arbitrarily between systems under certain restrictions. Furthermore, there is no restriction on the order of the data. By utilizing this advantage for inter-system communication, it is not necessary to change the existing program on the data receiving side, as will be described later in detail. Regarding tag settings, HTM
L can only use tags that can be interpreted by the browser, whereas XML does not have such a restriction. By effectively utilizing such advantages, it is possible to minimize the work required for efficient event notification and change of the system and application due to a change in the specification of event data to be notified.

Next, the event notification processing according to the present embodiment will be described with reference to the flowcharts shown in FIGS. In the present embodiment, a case where data is transmitted from the system 2-1 (system A) to the other systems 2-2 to 2-n will be described as an example.
-2, 2-n (systems B and N) will be described as a representative.

When the same data is transmitted to the systems B and N in the system A, which is the event transmitting side, in response to a request from the application executed by the application executing unit 3 (step 101), the XML is used.
The document creation processing unit 4 creates an XML document by sandwiching each data with a predetermined tag (step 102). FIG. 4 shows an example of the created XML document.
The document is for notifying an event of screen display. The communication processing unit 5 transmits the created XML document to the systems B and N (step 103).

When each of the communication processing units 6 of the systems B and N on the event receiving side receives the XML document (step 11).
1), the DTD analysis processing unit 9 of the event data extraction processing unit 7 analyzes the document structure of the received XML document (step 112). Then, all the event data sandwiched between the tags described in the XML document is extracted (step 113). The event generation processing unit 10 extracts only the event data required by the application waiting for data reception from the event data extracted by the DTD analysis processing unit 9 and transfers the event data to the application (step 114). As a result, the application starts a predetermined process based on the received data (step 11).
5). In this way, a plurality of systems B and N are notified of an event by a single XML document that is an event notification document transmitted from the system A.

Next, by changing the data structure to be notified,
For example, a description will be given of a case where an event process of saving the data content in the database is added only to the system B. At this time, in the system B, the fact that this processing has been added is known in advance, and the event generation processing unit 10 that extracts event data and the application that processes based on the received data have already dealt with the change in this specification. . On the other hand, in the system N not related to the added processing, no change is made.

The system A on the event transmitting side transmits the XML document to the systems B and N by performing the same processing as described above. At this time, an example of the XML document transmitted is shown in FIG. 5, but as compared with FIG. 4, “<DB> MsgDat
a </ DB> ”has been added.
As is clear from this example, no information indicating an instruction to only the system B is described.

In the systems B and N on the event receiving side, the same processing as described above is performed. However, the event data extracted by the system B and the event data extracted by the system N accompanying the addition of the event data are different.

That is, in the system B, when the communication processing unit 6 receives the XML document (step 111), the DTD analysis processing unit 9 of the event data extraction processing unit 7 analyzes the document structure of the received XML document, All event data is extracted (steps 112 and 113). Then, the event generation processing unit 10 extracts only the event data required by the application waiting for data reception from the event data extracted by the DTD analysis processing unit 9, but at this time, with the change of the specification, “<” DB> ”and“ </ DB
Event data sandwiched between tags >> is also extracted and passed to the application (step 114).

On the other hand, in the system N, the communication processing unit 6
Receives the XML document (step 111), the DTD analysis processing unit 9 of the event data extraction processing unit 7 analyzes the document structure of the received XML document and extracts all event data (steps 112 and 113). . And
The event generation processing unit 10 extracts only the event data required by the application waiting for data reception from the event data extracted by the DTD analysis processing unit 9, but at this time, in the system N, there is no change. Since there is no event data, event data sandwiched between tags “<DB>” and “</ DB>” is not extracted.

According to the present embodiment, the event format is X
By using ML, even if the event format (definition of data) differs on the receiving system side, only the event data to be processed can be extracted. As a result, there is no need to change the receiving side system which does not need to be changed unlike the related art in which the inter-event communication is performed using the CSV format. Alternatively, changes in the transmitting system can be minimized.

In the present embodiment, a tag name that can identify the data content can be arbitrarily set between systems under certain restrictions. However, even if a language having the same characteristics as XML appears in the future, a system using that language is within the scope of the present invention.

[0024]

According to the present invention, event data is sandwiched between reserved words defined in the system, such as XML, and the event is notified using the created event notification document. Even when the content of the event to be notified to the receiving side system is changed, the work of changing the system and application can be minimized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an event notification system according to the present invention.

FIG. 2 is a flowchart illustrating a process on an event transmitting side according to the present embodiment.

FIG. 3 is a flowchart showing processing on the event receiving side in the present embodiment.

FIG. 4 is a diagram showing an example of an XML document created in the present embodiment.

FIG. 5 is a diagram showing an example of an XML document created after a specification change in this embodiment.

[Explanation of symbols]

1 network, 2-1 to 2-n system, 3, 8
Application execution unit, 4 XML document creation processing unit, 5, 6 communication processing unit, 7 event data extraction processing unit, 9 DTD analysis processing unit, 10 event generation processing unit.

Claims (3)

[Claims] 1. An event notification system for notifying an event notification document transmitted from an event transmission side system to an event reception side system, wherein the event transmission side system includes one or more active transmission applications. Event notification document creation processing means for creating an event notification document having a single document type definition file structure by sandwiching all event data to be transmitted to each application running on the system with a reserved word defined in the system. An event data extracting process for extracting only event data required by an operating receiving application by referring to a reserved word from an event notification document transmitted from the event transmitting system; Having means Event notification system and butterflies. 2. An event data extraction processing means for extracting all event data described in an event notification document by referring to a reserved word; The event according to claim 1, further comprising: an event generation processing unit that extracts only event data required by an application operating in the system from the event data extracted by the processing unit and passes the event data to the application. Notification system. 3. The event notification system according to claim 1, wherein the event notification document is an XML document.