JP2002351682A - Information processing method and information processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform various applications by acquiring/constructing an performance environment corresponding to the applications. SOLUTION: A client device 100 acquires information (property information) regarding a Java (R) performance environment or the like required for performing the applications by analyzing the tag of an HTML document 414. In the case that a specified Java (R) performance environment is not provided, the client device 100 downloads the Java (R) performance environment 412 from a server device 400. In the case of normally downloading the Java (R) performance environment 412 from the server device 400, the client device 100 starts the downloading of the application 413. In the case of succeeding in the downloading of the application, the client device 100 performs the application by the Java (R) performance environment 112.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an information processing method and an information processing system in which a client device acquires an application program from a server device and executes the application program.
Even if the client device does not have an execution environment for processing the acquired application program, the execution program that can perform the processing of the application program is acquired from the server device, and the execution environment is constructed. The present invention relates to an information processing method and an information processing system capable of performing processing of an application program.

[0002]

2. Description of the Related Art Java (Sun Microsystems, Inc., USA)
(Registered trademark) is advantageous in that it can be used on any platform, that software can be reused using object-oriented technology, and that it is easy to build a system on the premise of network connection via the Internet, etc. It is used by many companies in development.

[0003] Today, it is actively used not only for personal computers and workstations but also for home appliances and embedded devices. For example, JP-A-10-24
In Japanese Patent Application Publication No. 2966, a communication device is provided with a Java (registered trademark) execution environment (a Java (registered trademark)
ava (registered trademark) application program interface), and Java from an external WWW browser.
An invention for controlling a communication device by downloading a (registered trademark) applet (application program) has been proposed. In Japanese Patent Application Laid-Open No. 2000-249563, a Java (registered trademark) execution environment is mounted on a car navigation device, and a Java (registered trademark) applet is downloaded from an external WWW browser.
An invention for controlling a car navigation device has been proposed. In addition, i-mode (a registered trademark of NTT DoCoMo, Inc.) compatible mobile phones have been
(Registered trademark) execution environment, etc.
The environment for using a (registered trademark) is expanding.

As described above, by mounting the Java (registered trademark) execution environment on a device, an application (application program) written in the Java (registered trademark) language is converted into bytecode by the Java (registered trademark) execution environment. Since it is compiled, Java
If the (registered trademark) execution environment is installed, the same application can be executed anywhere without being affected by the difference of the devices.

[0005]

SUMMARY OF THE INVENTION However, Java
As the number of devices equipped with the a (registered trademark) execution environment increases, Java, such as differences in memory capacity and CPU performance, differences in user interfaces such as display devices and input devices, and differences in communication interfaces related to data communication with other devices, etc.
Due to the physical restrictions of a device on which a (registered trademark) execution environment is mounted, a Java (registered trademark) execution environment having limited and specialized functions according to the hardware of the device has been provided.

[0006] For this reason, an application dedicated to a specific Java (registered trademark) execution environment is also being created as an application to be processed in the Java (registered trademark) execution environment. For example, NTT
Even if an application created exclusively for the Java (registered trademark) execution environment corresponding to docomo's i-mode (registered trademark) is downloaded, Java other than i-mode (registered trademark)
It cannot be executed in the va (registered trademark) execution environment.

As described above, originally Java (registered trademark)
Has the advantage of being platform independent, but today, certain Java
Copy the application corresponding to the execution environment to the J
There is a problem that it cannot be executed in the ava (registered trademark) execution environment.

[0008] The present invention has been made in view of these problems, and an object of the present invention is to cope with an application that does not have an execution environment corresponding to the application. It is an object of the present invention to provide an information processing method and an information processing system capable of executing various applications by acquiring a program for constructing an executed execution environment and constructing the execution environment.

[0009]

According to the present invention, in order to achieve the above object, the invention according to claim 1 obtains an application program from a server device and executes the application program in a client device. An information processing method, comprising: an execution program for constructing an execution environment for executing the application.
An execution program acquisition step of acquiring from the server device, an execution environment construction step of constructing the execution environment based on the execution program, an application program acquisition step of acquiring the application program from the server device, ,
And an application program execution step of executing the application program.

The invention according to claim 2 is the invention according to claim 1, further comprising a property information obtaining step of obtaining environment information on the execution environment, wherein the execution program obtaining step is a property information obtaining step. The execution program is specified based on the environment information acquired by the above, and the execution program is acquired.

According to a third aspect of the present invention, in the second aspect of the present invention, the execution program obtaining step includes:
A server device holding the execution program is specified based on the environment information, and the execution program is acquired from the server device.

According to a fourth aspect of the present invention, in the first, second, or third aspect of the present invention, when the execution environment has already been established in the client device, the execution program obtaining step is omitted. It is characterized by the following.

[0013] The invention according to claim 5 is the invention according to claims 1 to 4.
In the invention according to any one of the above, when the application program is created in an object-oriented programming language, when the application program is executed, a system class referred to by the application program is set in the server device. In the determination, the execution program obtaining step obtains the system class determined in the server device and the execution program at the same time.

[0014] The invention according to claim 6 is the invention according to claims 1 to 5.
In the invention according to any one of the above, when the acquisition of the execution program fails in the execution program acquisition step, or when the acquisition of the application program fails in the application program acquisition step, a notification step of notifying an error. Is further provided.

[0015] The invention according to claim 7 is the invention according to claims 1 to 6.
In the invention according to any one of the above, after executing the application program, an execution program deletion step of deleting the execution program from the client device, and an application for deleting the application program from the client device after execution of the application program And a program deleting step.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, the step of deleting the execution program comprises:
In the client device, the execution program is deleted when a deletion instruction to delete the execution program is issued.

According to a ninth aspect of the present invention, in the invention of the seventh or eighth aspect, the step of deleting the application program comprises:
The application program is deleted when a deletion instruction to delete the application program is given.

According to a tenth aspect of the present invention, in any one of the first to ninth aspects, the execution environment is an interpreter execution environment.

[0019] The invention according to claim 11 is the invention according to claim 10, wherein the interpreter execution environment is Ja.
va (registered trademark) execution environment.

According to a twelfth aspect of the present invention, in the information processing system having a server device holding an application program and a client device executing the application program by acquiring the application program from the server device, An execution environment construction means for constructing the execution environment in the client device based on an execution program for constructing an execution environment for executing the application; and an execution environment constructed by the execution environment construction means in the client device. And an application program executing means for executing the application program.

According to a thirteenth aspect of the present invention, in the twelfth aspect of the present invention, the client device obtains the application program from the server device, and an application program holding the application program. Holding means, property information obtaining means for obtaining environment information on the execution environment, and an execution program for specifying the execution program and obtaining the execution program based on the environment information obtained by the property information obtaining means It is characterized by comprising an acquisition means and an execution program holding means for holding the execution program.

According to a fourteenth aspect, in the thirteenth aspect, the execution program obtaining means includes:
A server device holding the execution program is specified based on the environment information, and the execution program is acquired from the server device.

According to a fifteenth aspect of the present invention, in the thirteenth or fourteenth aspect of the present invention, when the execution environment is already established in the client device, Is not obtained from the server device.

According to a sixteenth aspect of the present invention,
In the invention described in 14 or 15, when the application program is created in an object-oriented programming language, the server device determines a system class referred to by the application program when executing the application program. There is provided a system class determining means, wherein the execution program obtaining means simultaneously obtains the system class determined by the system class determining means and the execution program.

According to a seventeenth aspect of the present invention, in the invention according to any one of the thirteenth to sixteenth aspects, the client device detects that the acquisition of the execution program or the application program has failed. And notifying means for notifying an error when the detecting means detects that the acquisition of the execution program or the application program has failed.

The invention according to claim 18 is the invention according to any one of claims 13 to 17, wherein the execution program deleting means for deleting the execution program from the execution program holding means after the execution of the application program. It is further characterized by being provided.

According to a nineteenth aspect of the present invention, in the invention according to any one of the thirteenth to eighteenth aspects, after executing the application program, the application program deleting means for deleting the application program from the application program holding means is provided. It is further characterized by being provided.

According to a twentieth aspect of the present invention, in accordance with the eighteenth aspect of the present invention, the client device further includes an execution program deletion selecting means for determining whether to delete the execution program from the execution program holding means. The execution program deletion unit deletes the execution program from the execution program holding unit after the execution of the application program only when the execution program deletion selection unit selects the execution program to be deleted. It is characterized by the following.

According to a twenty-first aspect of the present invention, in the nineteenth aspect, the client device includes an execution application program deletion selecting unit that determines whether to delete the application program from the application program holding unit. In addition, the application program deletion unit deletes the application program from the application program holding unit after the execution of the application program only when the application program deletion selection unit selects the application program to be deleted. It is characterized by doing.

According to a twenty-second aspect of the present invention, in any one of the twelfth to twenty-first aspects, the application program and the execution program are held by different server devices.

According to a twenty-third aspect of the present invention, in any one of the twelfth to twelfth aspects, the execution environment is an interpreter execution environment.

The invention according to claim 24 is the invention according to claim 23, wherein the interpreter execution environment is Ja.
va (registered trademark) execution environment.

According to a twenty-fifth aspect of the present invention, the client device in the information processing system includes a server device that holds an application program, and a client device that acquires the application program from the server and executes the application program. An execution program acquiring step of acquiring, from the server device, an execution program for constructing an execution environment for executing the application, and an execution environment construction for constructing the execution environment based on the execution program. And an application program obtaining step of obtaining the application program from the server; and
An application program executing step of executing the application program.

The invention according to claim 26 is the invention according to claim 25, further comprising a property information acquiring step for acquiring environment information on the execution environment, wherein the execution program acquiring step is a property information acquiring step. The execution program is specified based on the environment information acquired by the above, and the execution program is acquired.

According to a twenty-seventh aspect of the present invention, in the invention according to the twenty-sixth aspect, the execution program obtaining step specifies a server device holding the execution program based on the environment information, It is characterized in that the execution program is obtained more.

The invention according to claim 28 is based on claim 25,
In the invention according to 26 or 27, when the execution environment is already constructed in the client device,
The execution program acquisition step is omitted.

According to a twenty-ninth aspect, in the invention according to any one of the twenty-fifth to twenty-eighth aspects, when the application program is created in an object-oriented programming language, the application program is executed. At this time, a system class referred to by the application program is determined in the server device, and the execution program obtaining step includes:
A system class determined by the server device and the execution program are simultaneously acquired.

According to a thirty-fourth aspect of the present invention, in the invention according to any one of the twenty-fifth to thirty-fifth aspects, when the acquisition of the execution program fails in the execution program acquisition step, or in the application program acquisition step, The method further comprises the step of notifying an error when the acquisition of the application program has failed.

According to a thirty-first aspect of the present invention, in the invention according to any one of the twenty-fifth to thirty-fifth aspects, an execution program deleting step of deleting the execution program from the client device after executing the application program; An application program deleting step of deleting the application program from the client device after the execution of the application program.

According to a thirty-second aspect of the present invention, in the thirty-first aspect of the present invention, the execution program deleting step is executed when the client device receives a deletion instruction to delete the execution program. It is characterized in that the program is deleted.

According to a thirty-third aspect of the present invention, in the thirty-first or thirty-second aspect, the application program deleting step is performed when the client device receives a deletion instruction to delete the application program. The application program is deleted.

According to a thirty-fourth aspect, in the invention according to any one of the twenty-fifth to thirty-fifth aspects, the execution environment is an interpreter execution environment.

The invention according to claim 35 is the invention according to claim 34, wherein the interpreter execution environment is Ja
va (registered trademark) execution environment.

According to a thirty-sixth aspect of the present invention, there is provided a computer-readable recording medium storing the program according to any one of the twenty-fifth to thirty-fifth aspects.

[0045]

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

[First Embodiment] FIG. 1 is a block diagram showing an information processing system according to the present invention. Client devices 100 and 200 and server devices 300 and 400 are connected by a network 10. Although FIG. 1 shows two client devices and two server devices, the client device and the server device
It is not limited to a table.

The client device 100 includes a CPU 101 for performing processing in the client device, and a CPU 101
A ROM 102 in which information necessary for the processing is recorded, a RAM 103 in which necessary information can be temporarily written,
A communication interface 104 for inputting and outputting data via the network 10; a user interface 105 including an input device for a user to input various types of client information; an output device for displaying various types of information;
And an external recording device 106 in which various data are recorded.

The external storage device 106 includes an operating system 110 for storing an operating system for operating the client device, a WWW browser 111 for displaying information on the Internet, and an application (Java (registered trademark)) downloaded from the server by the client device. ) Applet) 113 and a Java (registered trademark) execution environment (Java (registered trademark) virtual machine) 112 for constructing an execution environment in which this application can operate. The necessary information is read out of the external storage device 106 to the RAM 103 from among the pieces of information thus obtained, whereby each process is performed. The client device 200 has the same configuration as the client device 100.

The server device 400 is also a client device 1
CPU 401, ROM 402,
A RAM 403, a communication interface 404, a user interface 405, and an external storage device 406 are provided.

The external storage device 406 includes an operating system 410 for operating the client device,
HTM transmitted in response to a request from a client device
L document 414 and WWW for transmitting HTML document
A server 411, a Java (registered trademark) execution environment 412, and an application (Java (registered trademark) applet) 413 transmitted to the client device in response to a request from the client device are stored, and necessary information is stored in an external storage. Processing is performed by being read from the device 406 to the RAM 403. The server device 3
00 is configured similarly to the server device 400.

In the client devices 100 and 200 and the server devices 300 and 400, ROM, RA
Although memory types are distinguished for convenience such as M and an external storage device, there is no particular limitation as long as the device can perform writing and reading. Further, the network 10 is not limited to a network connected by a wired system, and may be a network connected by a wireless system using radio waves or infrared rays. Further, the network 10 is not limited to a network used only in a limited area like a LAN, and may be open to the outside such as the Internet. A detailed description of operations and functions generally known for the client device and the server device will be omitted.

FIGS. 2 and 3 are views showing the contents of an example of the HTML document stored in the external storage device of the server device. The HTML document 414 includes a document that can be browsed by the WWW browser 111 of the client device 100 and Java (registered trademark) under the WWW browser 111.
An application (Java (registered trademark) applet) that can be executed using the execution environment 112 can be included. Client device 100 is server device 4
When the HTML document is received from 00, the WWW browser 1
11 formats the HTML document and then displays a sentence on the display unit of the user interface 105 of the client device 100. Further, the CPU 1 of the client device 100
01 determines that there is an application execution instruction (<applet> tag) in the HTML document, requests the server device 400 to download the specified application and stores the application in the HTML document. By downloading the application 413, the application 113 is acquired and executed using the Java (registered trademark) execution environment 112.

In the HTML document shown in FIGS. 2 and 3, a <property> tag is provided so that the client device holds information on the Java (registered trademark) execution environment required by the application as property information. ing.

The operation of the information processing system described above will be described below with reference to the flowcharts shown in FIGS. FIG. 4 is a flowchart illustrating an example of an operation procedure of a program used in the client device.
FIG. 5 is a flowchart illustrating an example of an operation procedure of a program used in the server device.

First, the client device 100 has the WWW
The server device 400 is accessed via the browser 111 (S200), and the HTML document 414 of the server device is provided.
Is requested (S202). At this time, the server 400
Receives a request from the client device by the WWW server 411 (S300) and analyzes the processing request (S3).
02), since the processing request is a request for an HTML document (S304, S308), the processing of the normal WWW server;
That is, the requested HTML document 414 is selected and transmitted (S312).

The client device is a WWW browser 11
1, the HTML received from the server device 400
The <applet> tag of the document is analyzed (S204), and the <property>
By obtaining the property information of the application from the tag (S206), the information of the Java (registered trademark) execution environment necessary for executing the application is extracted (S206).
208).

In the HTML document shown in FIG.
The type of the ava (registered trademark) virtual machine is “CVM”, the configuration is “CDC”, and the profile is “Personal P”.
rofile "is obtained. In the HTML document shown in FIG.
(Registered trademark) The property information that the type of the virtual machine is “KVM”, the configuration is “CLDC”, and the profile is “MID Profile” is acquired. Further, in the HTML document shown in FIG. 5, the description of "codebase" indicates that J
It is explicitly instructed that the ava (registered trademark) execution environment is stored in a server device different from the server device in which the application is stored. As described above, the client device analyzes the tag of the HTML document, and thereby executes the J required for executing the application.
Information (environment information) on the ava (registered trademark) execution environment and the server device having the Java (registered trademark) execution environment is acquired as property information.

After obtaining information on the Java (registered trademark) execution environment and the like, the client
It is determined whether or not the client device has a va (registered trademark) execution environment (S210). As a result of the determination, the client device specifies the Java specified by the HTML document.
If the a (registered trademark) execution environment already exists, a determination process (S216) is performed to determine whether to download the application. If the client device does not have the designated Java (registered trademark) execution environment,
The server 400 is requested to download the ava (registered trademark) execution environment (S212). At this time, the client device transmits information such as the type of the operating system of the client device 100 and the type of the CPU to the server device 400 so as to receive an appropriate Java (registered trademark) execution environment.

The server device 400 is a client device 1
When a download request of the Java (registered trademark) execution environment is received from S00 (S300), the processing request is analyzed (S302, S304), and the requested Java (registered trademark) execution environment 412 is read from the external storage device 406. Is transmitted to the client device 100 (S30).
6). If the client device 100 specifies a server device in which the designated Java (registered trademark) execution environment is stored from the HTML document, the client device 100 specifies the Java device in the server device.
Request download of va (registered trademark) execution environment.
If the client device fails to download the Java (registered trademark) execution environment, a warning or error message is displayed on the display unit (S215), and the process ends.

If the client device 100 has already been Java
If the client device 100 has the (registered trademark) execution environment or the Java (registered trademark) execution environment is normally downloaded from the server device, the client device 100 starts downloading the application 413 (S21).
6). The client device 100 determines whether the download of the application has been successful (S218). If the download of the application has failed, the client device 100 displays a warning or an error message on the display unit (S21).
9), end the processing.

When the client device 100 succeeds in downloading the application, the client device 100 executes the application using the Java (registered trademark) execution environment 112 (S220). When the processing of the application 113 ends, the client device 100 deletes the application 113 from the external storage device 106 (S22
2) Subsequently, the Java (registered trademark) execution environment 112 is deleted from the external storage device 106 (S224), and the process is terminated.

In the present embodiment, an HTML document is included in an HTML document so that a client device can acquire information such as a Java (registered trademark) execution environment as property information.
<property> tag is provided, but directly to the application,
Information such as a Java (registered trademark) execution environment or the like may be embedded, information may be stored together in an archive file in which an application is stored, or information may be linked as a separate file from an HTML document.

As described above, by using the information processing system described in the first embodiment, in a client device that downloads and executes an application, the client device establishes a Java (registered trademark) execution environment corresponding to the application. Even if you do not have it, download the Java (registered trademark) execution environment corresponding to the application to be downloaded and download Java
By constructing a Java (registered trademark) execution environment, it becomes possible to execute an application. Therefore, it is possible for a user to use various applications without being aware of the difference between the Java (registered trademark) execution environments. Will be possible.

Since the client device can specify the server device in which the Java (registered trademark) execution environment is stored by using the property information,
By separately providing the server device storing the (registered trademark) execution environment and the server device storing the application, it is possible to efficiently manage the Java (registered trademark) execution environment.

[Second Embodiment] Next, a second embodiment of the information processing system according to the present invention will be described. In the information processing system according to the second embodiment, the client device selects whether to delete the downloaded application after executing the application, and whether to delete the downloaded Java (registered trademark) execution environment after executing the application. It differs from the information processing system of the first embodiment in that it is configured to be able to do so. Since the configurations of the client device and the server device are the same as those in the first embodiment, the detailed description of the client device and the server device is omitted, and the portions corresponding to the first embodiment are denoted by the same reference numerals. A second embodiment will be described.

FIG. 6 is a diagram showing an operation screen displayed on the display unit of the client device. The display unit displays an operation screen for selecting whether to keep the downloaded application and Java (registered trademark) execution environment in the cache without deleting them even after the execution of the application. By selecting whether to leave the Java (registered trademark) execution environment and the application in the external storage device 106 of the client device on the screen, the application, the Java, and the like are selected according to the selection.
a. Processing for deleting the (registered trademark) execution environment is performed.

An example of a processing procedure of a program used in the information processing system according to the second embodiment will be described below with reference to FIGS. Since the processing procedure of the server device of the second embodiment is the same as that of the first embodiment, the program shown in the flowchart of FIG. 5 can be used.

FIG. 7 is a flowchart showing an example of an operation procedure of a program used in the client device according to the second embodiment. First, the client device 100
The server device 400 is accessed via the W browser 111 (S600), and an HTML document 414 of the server device 400 is requested (S602). At this time, the server apparatus 400 receives a request from the client apparatus 100 by the WWW server 411 (S300), analyzes the processing request (S302), and determines that the request is an HTML document (S304, S308). The server process, that is, the process of selecting and transmitting the requested HTML document 414 (S312) is performed.

The client device 100 receives the H received from the server device 400 by the WWW browser 111.
The <applet> tag of the TML document is analyzed (S604), and the <prot>
By obtaining the property information of the application from the <perty> tag (S606), the information of the Java (registered trademark) execution environment necessary for executing the application is extracted (S608).

After obtaining the property information on the Java (registered trademark) execution environment and the like,
It is determined whether or not the client device 100 has the designated Java (registered trademark) execution environment (S61).
0). As a result of the determination, the client device 100
If the Java (registered trademark) execution environment specified by the L document 414 already exists, the process of determining whether to download the designated application (S61)
Perform 6). If the client device 100 does not have the designated Java (registered trademark) execution environment,
The server 400 is requested to download the va (registered trademark) execution environment (S612). At this time, the client device 100 transmits information such as the type of the operating system of the client device 100 and the type of the CPU to the server device 400 so as to receive an appropriate Java (registered trademark) execution environment. .

The server device 400 is the client device 1
When a download request of the Java (registered trademark) execution environment is received from S00 (S300), after analyzing the processing request (S302, S304), the requested Java is downloaded.
The execution environment 412 is read from the external storage device 406 and transmitted to the client device 100 (S30).
6). When the client device 100 specifies a server device in which a designated Java (registered trademark) execution environment is stored from an HTML document, the client device 100 stores the Java (registered trademark) execution environment in the server device.
Request download of va (registered trademark) execution environment.
If the client device fails to download the Java (registered trademark) execution environment, a warning or error message is displayed on the display unit (S615), and the process ends.

If the client device already has the Java (registered trademark) execution environment, or if the client device has normally downloaded the Java (registered trademark) execution environment from the server device, the client device executes the designated application. (S61).
6). If the client device already has the application, the client device executes the application execution processing (S622). When the client device 100 does not have the application, the client device 100 starts downloading the application (S618). The client device determines whether the download of the application has been successful (S620). If the download of the application has failed, the client device displays a warning or an error message on the display unit (S621), and ends the process.

When the client device 100 has successfully downloaded the application or already has the application, the client device 100 executes the application using the Java (registered trademark) execution environment (S).
622). When the processing of the application is completed, the client device 100 determines whether or not there is a designation to delete the application (S624). If there is a deletion designation, the client device 100 deletes the application from the external storage device 106 (S626).

Thereafter, the client device 100 executes the Ja
It is determined whether deletion of the va (registered trademark) execution environment is specified (S628). If deletion is specified, Java is determined.
The (registered trademark) execution environment is deleted from the external storage device 106 (S630), and the process ends.

As described above, by using the information processing system described in the second embodiment, the first embodiment
Similarly, in a client device that downloads and executes an application, even if the client device does not have a Java (registered trademark) execution environment corresponding to the application, Java (registered trademark) corresponding to the application is used. By downloading the execution environment and constructing the Java (registered trademark) execution environment, it becomes possible to execute the application, so that the user can perform various operations without being aware of the difference between the Java (registered trademark) execution environments. Application can be used.

Further, whether or not the user deletes the downloaded application and whether or not to delete the downloaded Java (registered trademark) execution environment are determined by:
Since you can select, Ja once downloaded
By leaving the va (registered trademark) execution environment in the client device, it becomes possible to download and execute only the application without downloading the java (registered trademark) execution environment again. Also, Java
a) Even if the server device does not have the (registered trademark) execution environment, by leaving the Java (registered trademark) execution environment required for the client device to execute the application, Only the program can be downloaded and executed.

Third Embodiment Next, a third embodiment of the information processing system according to the present invention will be described. In the information processing system described in the third embodiment, in a server device, a system class referred to by an application requested to be downloaded from a client device is checked,
When the client device downloads the Java (registered trademark) execution environment, the system class determined by
The configuration differs from the information processing system described in the first embodiment in that the download is performed in combination with the ava (registered trademark) execution environment. Since the configurations of the client device and the server device are the same as those of the first embodiment, the detailed description of the client device and the server device is omitted, and the same reference numerals are used for the portions corresponding to the first embodiment. Embodiment 3 will be described with reference to FIG.

FIG. 8 is a flowchart showing an example of an operation procedure of a program used in the server device according to the third embodiment. The client device performs the same processing as in the first embodiment, and can use the program shown in the flowchart of FIG.

First, the client device 100
The server device 400 is accessed via the browser 111 (S200), and the HTML document 414 of the server device is provided.
Is requested (S202). At this time, the server 400
Receives a request from the client device by the WWW server 411 (S800) and analyzes the processing request (S8).
02), since the processing request is a request for an HTML document (S804, S812), normal WWW server processing,
In other words, the requested HTML document 414 is selected and transmitted (S816).

The client apparatus 100 uses the WWW browser 111 to receive the H received from the server apparatus 400.
The <applet> tag of the TML document is analyzed (S204), and
By obtaining the property information of the application from the <perty> tag (S206), the information of the Java (registered trademark) execution environment necessary for executing the application is extracted (S208).

After obtaining the information on the Java (registered trademark) execution environment and the like, the client device 100 determines whether or not the client device has the designated Java (registered trademark) execution environment (S210). . As a result of the determination, when the client device 100 already has the Java (registered trademark) execution environment specified by the HTML document, a determination process (S216) is performed to determine whether to download the application. If the client device 100 does not have the designated Java (registered trademark) execution environment, the client device 100 requests the server device 400 to download the Java (registered trademark) execution environment (S212). At this time, the client device 100
(Registered trademark)
Information such as the type of the operating system of the client device 100 and the type of the CPU is transmitted to the server device 400.

The server device 400 is the client device 1
When a request for downloading a Java (registered trademark) execution environment is received from 00 (S800), the processing request is analyzed (S802, S804), the system class referred to by the application is checked (S806), and the checked system class is checked. The client device 1 is combined with the requested Java (registered trademark) execution environment 412 (S808).
00 (S810). When the client device 100 specifies the server device storing the designated Java (registered trademark) execution environment from the HTML document, the client device 100 requests the server device to download the Java (registered trademark) execution environment.

If the client device 100 fails to download the Java (registered trademark) execution environment,
A warning or error message is displayed on the display (S
215), and the process ends. Client device is already J
In the case where the client has the Java (registered trademark) execution environment, or when the Java (registered trademark) execution environment is normally downloaded from the server device, the client machine 100
Starts downloading the application (S2
16). The server device transmits the application to the client in response to the request from the client device (S812) (S814).

The client device 100 determines whether the application has been successfully downloaded (S21).
8) If the download of the application has failed, a warning or error message is displayed on the display unit (S219), and the process ends.

When the client device 100 succeeds in downloading the application, the client device 100 executes the application using the Java (registered trademark) execution environment (S220). When the processing of the application is completed, the client device deletes the application 113 from the external storage device 106 (S222).
The Java (registered trademark) execution environment 112 is stored in the external storage device 1
06 (S224), and the process ends.

As described above, by using the information processing system according to the third embodiment, as in the first and second embodiments, in the client device for downloading and executing the application, the client device Corresponding Java (registered trademark)
Even if you do not have an execution environment, Java (registered trademark) corresponding to the application to be executed
By downloading the execution environment and constructing the Java (registered trademark) execution environment, it becomes possible to execute the application, so that the user can perform various operations without being aware of the difference between the Java (registered trademark) execution environments. Application can be used.

Further, since the server device checks the system class referred to by the application and transmits this system class together with the Java (registered trademark) execution environment to the client device, the system class that is not referred to in the application is determined. It is possible to prevent the situation of being downloaded, and in addition to shortening the download time, it is possible to effectively use the memory resources by reducing the amount of data to be downloaded.

As described above, the information processing system according to the present invention
The present invention is not limited to the contents of the above-described embodiment. For example, the processing described in the present invention can be realized in either a hardware form or a software form, or a combination of both. For example, even in a storage medium or the like that stores a computer program for realizing the functions of the above-described embodiments, the processing according to the present invention can be realized by reading out the program and executing the program on a computer.

Further, in this embodiment, a Java (registered trademark) applet is used as an application.
Although the description has been made using the Java (registered trademark) execution environment as the execution environment, the present invention is not limited to applications and the like in the Java (registered trademark) environment. For example, the present invention can be applied to software languages other than Java (registered trademark) and other interpreter execution environments.

In order to execute a program dependent on a specific operating system in another operating system, an emulator capable of making the operating system compatible with a different operating system is downloaded. Even if the information processing system is configured to execute various programs by giving the compatibility of the above, it is included in the technical scope of the present invention.

[0091]

As described above, according to the present invention, even if a client device that acquires and executes an application does not have an execution environment corresponding to the application, the execution corresponding to the application is performed. By acquiring the environment and building the execution environment, it becomes possible to execute the application,
The user can use various applications without being aware of the difference in the execution environment.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an information processing system according to the present invention.

FIG. 2 shows H stored in an external storage device of the server device.
FIG. 4 is a diagram illustrating the contents of an example of a TML document.

FIG. 3 shows H stored in an external storage device of the server device.
FIG. 4 is a diagram illustrating the contents of an example of a TML document.

FIG. 4 is a flowchart illustrating an example of an operation procedure of a program used in a client device in the first and third embodiments.

FIG. 5 is a flowchart illustrating an example of an operation procedure of a program used in a server device according to the first and second embodiments.

FIG. 6 is a diagram illustrating an operation screen displayed on a display unit of a client device according to the second embodiment.

FIG. 7 is a flowchart illustrating an example of an operation procedure of a program used in a client device according to the second exemplary embodiment.

FIG. 8 is a flowchart illustrating an example of an operation procedure of a program used in a server device according to a third embodiment.

[Explanation of symbols]

 10 Network 100, 200 Client device 101, 401 CPU 102, 402 ROM 103, 403 RAM 104, 404 Communication interface 105, 405 User interface 106, 406 External storage device 110, 410 Operating system 111, 411 WWW browser 112, 412 Java ( (Registered trademark) execution environment 113, 413 application 414 HTML document 300, 400 server device

Claims (36)

[Claims] 1. An information processing method in a client device for acquiring an application program from a server device and executing the application program, wherein the execution program for constructing an execution environment for executing the application is executed from the server device. An execution program acquisition step for acquiring; an execution environment construction step for constructing the execution environment based on the execution program; an application program acquisition step for acquiring the application program from the server device; And an application program executing step of executing the information processing. 2. A property information acquiring step of acquiring environment information on the execution environment, wherein the execution program acquiring step specifies the execution program based on the environment information acquired by the property information acquiring step. The information processing method according to claim 1, wherein the execution program is acquired. 3. The execution program acquiring step according to claim 2, wherein a server device holding the execution program is specified based on the environment information, and the execution program is acquired from the server device. The information processing method described. 4. The information processing method according to claim 1, wherein the execution program obtaining step is omitted when the execution environment has already been constructed in the client device. 5. When the application program is created in an object-oriented programming language, the server device determines a system class referred to by the application program when executing the application program. 5. The information processing method according to claim 1, wherein the execution program obtaining step obtains the system class determined in the server device and the execution program at the same time. 6. When the acquisition of the execution program fails in the execution program acquisition step, or
6. The information processing method according to claim 1, further comprising a notifying step of notifying an error when the acquisition of the application program fails in the application program acquiring step. 7. An execution program deletion step of deleting the execution program from the client device after the execution of the application program; and an application program deletion step of deleting the application program from the client device after the execution of the application program. The information processing method according to claim 1, further comprising: 8. The information according to claim 7, wherein the execution program deletion step deletes the execution program when the client device receives a deletion instruction to delete the execution program. Processing method. 9. The application program deletion step according to claim 7, wherein the application program is deleted when the client device receives a deletion instruction to delete the application program. Information processing method. 10. The information processing method according to claim 1, wherein the execution environment is an interpreter execution environment. 11. The interpreter execution environment may be Java.
The information processing method according to claim 10, wherein the information processing method is a (registered trademark) execution environment. 12. An information processing system comprising: a server device that holds an application program; and a client device that acquires the application program from the server device and executes the application program. An execution environment construction means for constructing the execution environment in the client device based on an execution program for constructing an environment; and the client device executing the application program in the execution environment constructed by the execution environment construction means. An information processing system comprising application program execution means. 13. The client device: an application program acquisition unit that acquires the application program from the server device; an application program holding unit that holds the application program; and property information acquisition that acquires environment information about the execution environment. Means, an execution program acquisition means for specifying the execution program based on the environment information acquired by the property information acquisition means and acquiring the execution program, and an execution program holding means for holding the execution program 2. The device according to claim 1, wherein
3. The information processing system according to 2. 14. The method according to claim 13, wherein the execution program acquisition unit specifies a server device that holds the execution program based on the environment information, and acquires the execution program from the server device. The information processing system as described. 15. The computer-readable storage medium according to claim 13, wherein the execution program acquisition unit does not acquire the execution program from the server device when the execution environment is already established in the client device. The information processing system as described. 16. When the application program is created in an object-oriented programming language, the server device determines a system class referred to by the application program when the application program is executed. The execution program acquisition means acquires the system class determined by the system class determination means and the execution program at the same time.
The information processing system according to 3, 14, or 15. 17. The client device, comprising: detecting means for detecting that acquisition of the execution program or the application program has failed; and detecting, by the detecting means, failure of acquisition of the execution program or the application program. 17. The information processing system according to claim 13, further comprising: a notifying unit that notifies an error when the error occurs. 18. The information processing apparatus according to claim 13, further comprising an execution program deletion unit that deletes the execution program from the execution program holding unit after the execution of the application program. system. 19. The information processing apparatus according to claim 13, further comprising an application program deleting unit that deletes the application program from the application program holding unit after executing the application program. system. 20. The client device further comprises an execution program deletion selection unit that determines whether or not to delete the execution program from the execution program holding unit, wherein the execution program deletion unit is configured to execute the execution program deletion selection unit. 19. The information processing system according to claim 18, wherein the execution program is deleted from the execution program holding unit after the execution of the application program only when the execution program is selected to be deleted. 21. The client device further includes an execution application program deletion selection unit that determines whether to delete the application program from the application program holding unit, wherein the application program deletion unit is an application program deletion selection unit. 20. The information processing system according to claim 19, wherein the application program is deleted from the application program holding unit after the execution of the application program only when the application program is selected to delete the application program. 22. The information processing system according to claim 12, wherein the application program and the execution program are held by different server devices. 23. The information processing system according to claim 12, wherein said execution environment is an interpreter execution environment. 24. The interpreter execution environment, wherein Java
The information processing system according to claim 23, wherein the information processing system is a (registered trademark) execution environment. 25. A program used by the client device in an information processing system having a server device holding an application program and a client device executing the application program by acquiring the application program from the server. An execution program acquisition step of acquiring an execution program for constructing an execution environment for executing the application from the server device; an execution environment construction step of constructing the execution environment based on the execution program; An application program acquiring step of acquiring an application program; and an application program executing step of executing the application program in the execution environment. Program which is characterized the door. 26. A property information acquiring step of acquiring environment information on the execution environment, wherein the execution program acquiring step specifies the execution program based on the environment information acquired by the property information acquiring step. The program according to claim 25, wherein the program is acquired. 27. The execution program acquisition step,
The program according to claim 26, wherein a server device that holds the execution program is specified based on the environment information, and the execution program is acquired from the server device. 28. The method according to claim 25, wherein the step of obtaining the execution program is omitted when the execution environment has already been established in the client device.
28. The program according to 6 or 27. 29. The application program,
In the case where the application program is created in an object-oriented programming language, when the application program is executed, a system class referred to by the application program is determined in the server device. The system system according to claim 25, wherein the determined system class and the execution program are acquired simultaneously.
The program according to any one of 8 above. 30. The method further comprising the step of notifying an error when the acquisition of the execution program has failed in the execution program acquisition step, or when the acquisition of the application program has failed in the application program acquisition step. The program according to any one of claims 25 to 29, characterized in that: 31. An execution program deletion step of deleting the execution program from the client device after the execution of the application program; and an application program deletion step of deleting the application program from the client device after the execution of the application program. 31. The program according to claim 25, further comprising: 32. The execution program deleting step,
32. The program according to claim 31, wherein the client device deletes the execution program when a deletion instruction to delete the execution program is issued. 33. The application program deleting step according to claim 31, wherein the application program is deleted when the client device receives a deletion instruction to delete the application program. Program. 34. The program according to claim 25, wherein the execution environment is an interpreter execution environment. 35. The interpreter execution environment, wherein:
35. The program according to claim 34, wherein the program is a (registered trademark) execution environment. 36. A computer-readable recording medium on which the program according to claim 25 is recorded.