JPH0991184A - Drawing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform an updating job in a client even during the suspension of a server relating to a drawing system in which updating is performed from the plural clients to the same record. SOLUTION: This drawing system is provided with drawing data bases 20 and 10 along with the server 2 and the plural clients 1. Updating processings in the respective clients 1 during the suspension of the server 2 are updated with a processing to plural updating elements in the record as a unit. When updating data in the respective clients 1 are concentrated while the server 2 is operated, all updating in the other clients 1 to the updating element of the early processing time in the certain client 1 is invalidated and all the processing for updating the same element as the element updated in the invalidated processing are invalidated in the client 1 which executed the invalidated processing. The drawing data base 20 of the server 2 is updated by the updating data 11 and 21 by valid processings and the updated data base 20 is distributed to the respective clients 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing system for updating a drawing, for example, a map, by a plurality of offline clients {for example, workstation (WS)}.

Since a drawing system often shares drawing data, it is often managed collectively by a server. However, the update work performed by the end user is often performed at a branch office such as a branch office, and is often performed at night or on a holiday when the normal work is finished. However, since the operation time of the server is limited, it is required that each client can update the drawing data shared by each client even when offline.

[0003]

2. Description of the Related Art FIG. 3 is a diagram for explaining a conventional drawing system. FIG. 3 (a) shows a case where a server file at a remote place is directly updated, and FIG. 3 (b) shows a remote place. The case where the drawing data is downloaded from the server and updated is shown.

(1) First, in the case of directly updating a server file at a remote location, as shown in FIG. 3 (a), a client at a remote location {workstation (hereinafter sometimes referred to as WS)} A local area network as a complete client-server by connecting one to another with a high-speed line
Build a (LAN).

Then, the map data file 20 of the server 2 is directly accessed from the remote client (WS) 1 to read the drawing unit or a part of the data into a main storage device (not shown), and a predetermined memory is read. After updating, restore the map data file 20. At this time, the contents of the map data file 20 are guaranteed by exclusively controlling the area of the drawing unit accessed by the client (WS) 1 so that another client (WS) 1 cannot update it. be able to.

(2) Next, when the drawing data is downloaded from a remote server and updated, as shown in FIG. 3 (b), the client (WS) 1 determines the version number, for example. Specify and update only the drawing you want to update from the map data file 20 of server 2 to your own map data file 10. Add the updated version number to the drawing that has been updated,
Transfer to.

Therefore, if each client (WS) 1 has the same version number of the drawing stored in its own map data file 10 and the version number of the drawing to be updated now, the client (WS) 1 receives from the server 2 The corresponding drawing in the self map data file 10 can be updated without downloading the drawing of the version number.

[0008]

Therefore, in the method (1) of directly updating the remote server file, the remote client (WS) 1 sends the map data file of the server 2 to
It is the most ideal method because 20 can be updated directly and exclusive control can be performed in a perfect form.

However, with this method, as described above, a high-speed line is required, and there is a problem that the line cost increases.
Also, while the server 2 is idle, all clients (WS) 1
However, there was a problem that the update process had to be stopped.

The method (2) of downloading drawing data from a remote server and updating the drawing data has the advantage of being able to use even a relatively low speed line and reducing the line cost.
There was a problem that it took time to download a large amount of map data (about 1MB / drawing) and the response deteriorated. In addition, there is a problem that the corresponding drawing cannot be updated while the server 2 is at rest.

As a similar technique, there is a technique disclosed in JP-A-64-21622, "Local screen paging system". In this technology, in summary, "Register continuous screen data to a file on the secondary storage medium connected to the terminal, read the screen from there, and display it. If the end key is pressed, the host side By sending the screen data to all at once ", the load of the line is reduced, the line efficiency is improved, and the processing time is shortened.
Corresponding to (2), there is a problem that drawing data cannot be updated on the terminal while the host (server) is idle.

As another similar technique, there is a technique disclosed in Japanese Unexamined Patent Publication No. 4-349574, "Map Data Management System", which the applicant of the present application filed earlier. This technology can be summarized as "Connecting multiple terminals to a host via a line,
The version check unit of the terminal notifies the host of its own version number using the map number of the reference target as a key, and only when the version number is different, the new version number and map data are sent, and the map Update data to the latest ". This also corresponds to the method of (2) above, and there is a problem that drawing data cannot be updated on the terminal while the host (server) is idle. .

As another similar technique, there is a technique disclosed in Japanese Unexamined Patent Publication No. 4-349575, "Terminal DB latest management system", which the applicant of the present application filed earlier. This technology can be summarized as follows: "Connecting multiple terminals to a host via a line, and responding to instructions from the host at a predetermined time or at a map number other than the map number defined in the distribution definition file. While deleting the data, notify the host of the current terminal version of the map of the defined map number via the line, and when the terminal version is older than the version of the host, the latest map data and The host version is transferred to the terminal via the line and the terminal DB is updated to the latest ". This technology also corresponds to (2) above, and when the host (server) is idle There is a problem that the drawing data cannot be updated on the terminal.

Whichever method is used, the server (host)
There was a problem that the client (terminal) could not update the map during the nights and holidays during which the service was suspended, which imposes time constraints on the map update work.

In view of the above-mentioned conventional drawbacks, the present invention updates each client while the server is inactive for each update element, reads the update result while the server is operating, and locks the update element by the server. An object of the present invention is to provide a drawing system capable of performing update work on a client while the server is idle by performing control.

[0016]

1 and 2 are views showing an embodiment of the present invention, and FIG. 1 shows a configuration example of a drawing system of the present invention in time series. FIG. 2 shows an example in which the server performs exclusive control in update element units. The above problems can be solved by the drawing system configured as follows.

(1) Server 2, multiple clients (WS) 1
Together, drawing database (DB) (map data file) 1
A drawing system that has 0, 20 and the same record is updated from multiple clients (WS) 1, and the update process in each client (WS) 1 while the server 2 is idle , Multiple update elements a1,
A means for updating the processing for a2, ... as a unit, and when the server 2 is operating, when the update data of each client (WS) 1 is collected, a predetermined exclusive processing is performed for each of the update elements a1, a2, ... Do your own drawing database (DB)
(Map data file) 20 is updated, and means for delivering the updated drawing data to each client (WS) 1 is provided.

(2) As the exclusive processing described in the above item (1),
A process that invalidates all the updates by other client (WS) 1 for the early update elements a1, a2, ... of processing time t1 in a client (WS) 1, and the client that executed the invalid process (WS) 1 consists of a process that invalidates all processes (T2) that update the same element (a3) as the elements a1, a2, ... updated by the invalid process (T1). To configure.

That is, in the drawing system shown in FIG. 1, during normal operation, the server 2 and the client (WS) 1
Together, map database (DB) (map data file) 2
It has 0 and 10 and outputs the update history. Because of this, the server
Even if 2 is dormant, it can be updated by each client (WS) 1, which is beneficial to the user.

However, since the offline processing is performed while the server 2 is inactive, it cannot hold exclusive information.
Multiple clients (W) for the same record (drawing)
S) Exclusive control cannot be performed for the update process in 1.

Therefore, in the drawing system of the present invention, FIG.
As shown in FIG. 2A, if the client (WS) A 1 updates the update element a1 in the record (drawing) as shown in FIG. ), The other client (WS) B 1 performs the update process for the same update element a1, specifically, the update element a1 and the update element a3 connected to the update element a1.
Update process for {update element a1, update element a3 connected to update element a1 from start of update,
A series of update process until the update process for
Here, by saying "Transaction", the client 2
Only the update process (a1 → a1 ′) in (WS) A 1 can be validated, and the inconsistency of the update process performed offline in each client (WS) 1 can be eliminated.

Further, as shown in FIG. 2B, in the client (WS) B 1 which has executed the invalidated transaction T1, the element a3 updated in the invalidated transaction T1 and By updating all the update processing that updates the same update element a3, specifically, the processing that updates update elements a3 and a4, ... (transaction T2) in FIG. 2 (b), It is possible to obtain the update result shown in FIG. 2 (c), that is, the result of validating only the update processing performed by the client (WS) A 1, and the update performed by each client (WS) 1 offline. The process can be consistent.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 and FIG. 2 are views showing an embodiment of the present invention.

In the present invention, both the server 2 and the plurality of clients (WS) 1 have a drawing database (DB) (map data file) 10,20, and for the same record,
A drawing system in which an update process is performed from a plurality of clients (WS) 1, and the update process at each client (WS) 1 while the server 2 is inactive is performed by a plurality of update elements a1, Means to update the processing for a2, ... as a unit, and when the server 2 is operating, each of the above clients (WS)
When the update data in 1 is collected, the above update elements a1, a
There is a means for performing predetermined exclusive processing in units of 2, to update its own drawing database (DB) 20 and delivering the updated drawing data to each client (WS) 1, and the exclusive processing. Other client (WS) 1 for early update element a1, a2, ... at processing time t1 in client (WS) 1
And the client (WS) 1 that executed the invalidated process updates the same elements as the elements a1, a2, ... updated by the invalidated process. The processing means for invalidating all the processing is the means necessary for implementing the present invention. Note that the same reference numerals indicate the same object throughout the drawings.

In this embodiment, the use at a waterworks will be described as an example. At the waterworks, the operating hours of the server (main office) 2 and the client (construction office) 1 are, for example: -Operating hours of the server (main office) 2: 9:00 to 16:30,
Monday-Friday ・ Operating hours of client (construction office): 9:00 to 4:00 the next day, no holidays, however, it is often used after 17:00 when the daytime work is completed and on holidays.

Therefore, it is necessary for each client (construction office) 1 side to be able to update the water map while the server (main office) 2 is at rest. FIG. 1 is a diagram showing a configuration example of the water supply drawing system in chronological order.

In this figure, for example, a workstation (WS) 1 is installed in a client (construction office), and at the workstation (WS) 1, a water supply map accompanying the piping work being carried out locally is carried out. Update of the water pipes a1, a2, ... on the map showing the water pipes a1, a2, ... , When the server (main office) 2 is operating, transfer it to the server (main office) 2 and update the map data file (master file) 20 provided in the server (main office) 2 to Centrally manage the accompanying maps. Hereinafter, the details of the update process will be described in chronological order.

The client (WS) 1 side reads the map data from the map data file 10 into a main storage area (not shown), updates the map data, and returns the update result to the map data file 10.

The update data of the client (WS) 1 is stored in the map data file 10 and at the same time stored in the update data file 11. The data format at this time is, for example, as shown in FIG. 2 (d), update elements (units of water pipes that can be updated) a1, a2, ...
It is composed of units, the previous information a1, the subsequent information a1 ', and the update time t1.
, Client (WS) 1 identification number A, ...

When the server 2 operates, it polls each client (WS) 1 for recognizing whether or not there is update data, and when it recognizes that there is update data, it updates the above-mentioned update data. Collect update data from file 11 to update data file 21.

As described above, since the update data is the data updated offline in each client (WS) 1, it may be inconsistent with each other. Therefore, in the drawing system of the present invention, the collected update data is stored in the server 2 as the update element a.
Exclusive control is performed in units of 1, a2, ..., extract update data that does not conflict with each other, and update the self map data file 20.

The above exclusive control will be specifically described with reference to FIG. In FIG. 2, a1, a2, ... Show update elements, and in the above-mentioned embodiment, the units that can be updated are water pipe units.

First, for the update element (water pipe, abbreviated below) a1 in one record (drawing), the client (WS) A 1
At time t1, a1 'shown in Fig. 2 (a)
As shown in Fig. 2 (b), if another client (WS) B is renewed (moving the water pipe),
1 is later than the above time t1 and the same update element a1
To the update element a1, and the update element a1 and the update element a3 connected to the update element a1 (the update element a3 connected to the update element a1 from the start of the update for this update element a1 Here, a series of update processing until the update processing for the, ... is completed is here a transaction T1 (processing surrounded by a dotted line in FIG. 2B).
Is invalidated in the receiving process in the server 2, and the updating process in the client (WS) A 1 (a 1 →
a1 ') can only be enabled and each client (W
S) It is possible to eliminate the inconsistency of the update processing performed offline in 1.

Further, as shown in FIG. 2B, in the client (WS) B 1 which has executed the invalidated transaction T1 (process surrounded by a dotted line in FIG. 2B), Element updated in invalid transaction
Update processing that updates the same update element a3 as a3, specifically, processing that updates update elements a3 and a4, ... in FIG. 2 (b) (transaction T shown by double line
By making all 2) invalid, the update result shown in FIG. 2 (c), that is, the result of validating only the update processing performed by the client (WS) A 1 can be obtained. (WS) 1 is able to make the update processing performed offline offline consistent. Without such exclusion processing, the water pipes a2 'and a1' and the water pipes a3 and a4 are not connected.

In order to perform such update processing, for example,
The update data of the format shown in FIG. 2 (d) is collected, the server 2 refers to the time t1, the number A, B, ... of the client (WS) 1, and the effective update process, that is, the update Only the processing with element a1 → a1 'and update element a2 → a2' can be valid.

On the server 2, all clients (WS) 1
Map data file that reflects the map update information
After storing in 20, the updated drawing is delivered to each client (WS) 1.

The distributed map data is stored in its own map data file 10 and operated. in this way,
A drawing system of the present invention is a drawing system in which a server and a plurality of clients each have a drawing database,
When the update processing in each client while the server is idle is updated in units of processing for a plurality of update elements in the above record, and when the server is running, the update data in each client is collected. For the update element whose processing time is early on the client, invalidate all updates on other clients, and update the same element as the element updated by the invalidated processing on the client that executed the invalidated processing. All of the processes are invalidated, the drawing database of the server is updated with the updated data by the valid process, and the updated database is distributed to each client.

[0038]

As described above in detail, according to the drawing system of the present invention, the drawing can be updated on the client (WS) side even during the night / holiday when the server is idle, and the drawing system can be used. The property is improved. Also, because it is not real-time processing,
A relatively low speed line can be used as the line, and the line load can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention (No. 1).

FIG. 2 is a diagram showing an embodiment of the present invention (Part 2).

FIG. 3 is a diagram illustrating a conventional drawing system.

[Explanation of symbols]

1 Client (WS), Client (construction office) 10 Map data file 11 Update data file 2 Server (main office) 20 Map data file 21 Update data file ~ Each process

Claims (2)

[Claims] 1. A drawing system in which a server and a plurality of clients each have a drawing database, and a plurality of clients perform update processing on the same record. A means for updating the processing in units of processing for a plurality of update elements in the record, and a predetermined exclusive processing for each update element when the update data of each client is collected while the server is operating. A drawing system for updating the own drawing database and delivering the updated drawing database to each client. 2. The exclusive process according to claim 1, which executes a process of invalidating all the updates of another client for an update element whose processing time is early in one client, and the invalidated process. A drawing system comprising: a process of invalidating all processes of updating the same element as the element updated by the invalidated process in the client.