CN114741261A - A distributed link tracking method, apparatus, device and storage medium - Google Patents

Abstract

The present application discloses a distributed link tracking method, apparatus, device and storage medium. The method includes: acquiring tracking data collected by different types of distributed link tracking tools through a proxy service, and converting the tracking data to a preset data format to obtain corresponding target format data; The target format data is reported to the target server, so that the target server can analyze the target format data. It can support the data reporting of link tracking tools of different technologies, that is, it supports multi-language link data collection and reporting, supports the link tracking data reporting collected by all current open source link tracking tools, and adds server-side multi-language. It can effectively reduce the number of connections on the server side and improve the performance of the server side.

Description

A distributed link tracking method, apparatus, device and storage medium

technical field

The present invention relates to the field of computer technology, and in particular, to a distributed link tracking method, apparatus, device and storage medium.

Background technique

At present, there are many solutions for distributed link tracking. Distributed link tracking refers to a technology that can track API (Application Programming Interface, application programming interface) call links in a distributed system. Different types of distributed link tracking Tool support for different languages is also uneven, and there are subtle differences in the format of the data collected. In the related art, multiple clients directly report the tracking data to the link tracking server after collecting the tracking data using their respective distributed link tracking tools, and the link tracking server directly supports the tracking data of various data sources. There are too many connections on the server side, which consumes the resources of the server side, and in order to support various distributed link tracking tools, the server side needs to be developed separately, which reduces the efficiency of distributed link tracking.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a distributed link tracking method, device, device and medium, which can support multilingual link data collection and reporting, and can effectively reduce the number of server connections. Its specific plan is as follows:

In a first aspect, the present application discloses a distributed link tracking method, including:

Obtain the tracking data collected by different types of distributed link tracking tools through the proxy service, and convert the tracking data to a preset data format to obtain the corresponding target format data;

The target format data is reported to the target server through the proxy service, so that the target server analyzes the target format data.

Optionally, obtaining the tracking data collected by different types of distributed link tracking tools through the proxy service includes:

Determine the corresponding target data adapter from the proxy service according to the type of the distributed link tracking tool, and use the target data adapter to receive the data collected by the distributed link tracking tool and reported in a corresponding format. tracking data;

Correspondingly, converting the tracking data to a preset data format to obtain corresponding target format data includes:

Determine the corresponding target data converter from the proxy service according to the type of the target data adapter, and use the target data converter to convert the tracking data received by the target data adapter into a preset data format , to get the corresponding target format data.

Optionally, before obtaining the tracking data collected by different types of distributed link tracking tools through the proxy service, the method further includes:

According to the type of the distributed link tracking tool, a corresponding data adapter and a data converter are respectively configured for each type of the distributed link tracking tool in the proxy service;

A mapping relationship is constructed for the data adapters and data converters corresponding to the distributed link tracking tool of the same type.

Optionally, after the mapping relationship is constructed for the data adapters and data converters corresponding to the distributed link tracking tools of the same type, the method further includes:

The link address corresponding to the data adapter is displayed through the proxy service, so that the client can select the corresponding link address according to the type of the distributed link tracking tool to send the tracking data to the proxy service.

Optionally, after converting the tracking data to a preset data format to obtain corresponding target format data, the method further includes:

Sorting the target format data according to a preset data structure to obtain sorted data;

The sorted data is cached to the terminal where the proxy service is located.

Optionally, the reporting of the target format data to the target service through the proxy service includes:

Report the target format data to the target server constructed based on the application performance analysis platform through the proxy service according to the target data reporting method;

Wherein, the target data reporting method is a hypertext transfer protocol reporting method, a serialization protocol reporting method or a Kafka reporting method.

Optionally, before reporting the target format data to the target server through the proxy service according to the target data reporting method, the method further includes:

obtaining a data reporting method configured by a preset configuration interface, and using the data reporting method as the target data reporting method;

Or, query a preconfigured data reporting rule according to the current project running status of the proxy service, and determine a data reporting method matching the project running status as the target data reporting method according to the data reporting rule.

In a second aspect, the present application discloses a distributed link tracking device, comprising:

a format conversion module, used for obtaining tracking data collected by different types of distributed link tracking tools through proxy services, and converting the tracking data to a preset data format to obtain corresponding target format data;

A data reporting module, configured to report the target format data to a target server through the proxy service, so that the target server can analyze the target format data.

In a third aspect, the present application discloses an electronic device, comprising:

memory for storing computer programs;

A processor for executing the computer program to implement the aforementioned distributed link tracking method.

In a fourth aspect, the present application discloses a computer-readable storage medium for storing a computer program; wherein the computer program implements the aforementioned distributed link tracking method when executed by a processor.

In this application, the tracking data collected by different types of distributed link tracking tools is obtained through the proxy service, and the tracking data is converted into a preset data format to obtain the corresponding target format data; The target format data is reported to the target server, so that the target server can analyze the target format data. Different distributed link tracking tools use different link tracking technologies, and different technologies support several different development languages. This application uses proxy services to collect tracking data in different languages from different types of distributed link tracking tools. After converting the format and reporting it to the server, it can support the data reporting of link tracking tools of different technologies, that is, it supports multi-language link data collection and reporting, and supports accepting links collected by all open source link tracking tools. Tracking data reporting increases the compatibility of multiple languages on the server, and can effectively reduce the number of connections on the server and improve the performance of the server.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the accompanying drawings required for the description of the embodiments or related technologies. Obviously, the accompanying drawings in the following description are only the For the embodiments of the invention, for those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without any creative effort.

1 is a flowchart of a distributed link tracking method provided by the application;

Fig. 2 is a kind of concrete distributed link tracking system structure diagram that this application provides;

3 is a flowchart of a specific distributed link tracking method provided by the application;

4 is a schematic structural diagram of a distributed link tracking device provided by the present application;

FIG. 5 is a structural diagram of an electronic device provided by the present application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the related art, multiple clients directly report the tracking data to the link tracking server after collecting the tracking data using their respective distributed link tracking tools, and the link tracking server directly supports the tracking data of various data sources. There is a problem that too many server connections consume server resources, and in order to support various distributed link tracking tools, the server needs to be developed, which reduces the efficiency of distributed link tracking. In order to overcome the above technical problems, the present application proposes a distributed link tracking method, which can support multilingual link data collection and reporting, and can effectively reduce the number of server connections.

An embodiment of the present application discloses a distributed link tracking method. Referring to FIG. 1 , the method may include the following steps:

Step S11 : Obtain the tracking data collected by different types of distributed link tracking tools through the proxy service, and convert the tracking data into a preset data format to obtain corresponding target format data.

In this embodiment, the constructed proxy service can obtain the tracking data collected by different clients through different types of distributed link tracking tools, and convert the above-mentioned tracking data into a preset data format, so as to obtain the corresponding target format data, It can be understood that different distributed link tracking tools may be developed in different development languages, so the link tracking technology may be different, and the format of the collected tracking data may also be different. Therefore, in this embodiment, the data format conversion is performed. technology, which supports link data collected in multiple languages and technologies. The above-mentioned distributed link tracking tools include but are not limited to zipkin, cat, skywaking, gaeger, etc. This embodiment supports sorting the received link data to form a set of standard reporting data, and processes data in various formats. into a standard data format to facilitate taking over the server.

In this embodiment, obtaining the tracking data collected by different types of distributed link tracking tools through a proxy service may include: determining a corresponding target from the proxy service according to the type of the distributed link tracking tool A data adapter, and using the target data adapter to receive the tracking data in a corresponding format collected and reported by the distributed link tracking tool. Correspondingly, in this embodiment, the converting the tracking data into a preset data format to obtain the corresponding target format data may include: determining the corresponding data from the proxy service according to the type of the target data adapter. The target data converter is used to convert the tracking data received by the target data adapter into a preset data format by using the target data converter to obtain corresponding target format data. It can be understood that, for example, as shown in the structure diagram of the distributed link tracking system shown in FIG. 2, the agent uses different data adapters to receive the reported data of different link tracking tools, and uses the corresponding data converter to process the received data. Perform conversion processing. For example, for the tracking data collected by the gaeger tool, the gaeger adapter is used to receive it, and the gaeger data converter is used for format conversion. The above target format data may be opentracing format data, that is, standardize the supported tracking data, and process it into a standard opentracing data format for output. Specifically, according to the characteristics of the gaeger data format and the characteristics of the opentracing data format, a format conversion rule for converting the gaeger format data to the opentracing format data can be constructed, so as to obtain the corresponding data converter, so that after receiving the data, use the The data converter converts data in opentracing format.

In this embodiment, before obtaining the tracking data collected by different types of distributed link tracking tools through the proxy service, the method may further include: according to the types of the distributed link tracking tools, in the proxy service, respectively: Each type of the distributed link tracking tool is configured with corresponding data adapters and data converters; a mapping relationship is constructed for the data adapters and data converters corresponding to the distributed link tracking tools of the same type. In this embodiment, after the mapping relationship is constructed for the data adapters and data converters corresponding to the distributed link tracking tool of the same type, the method may further include: displaying the link address corresponding to the data adapter through the proxy service , so that the client can select a corresponding link address according to the type of the distributed link tracking tool to send the tracking data to the proxy service. It can be understood that the above-mentioned data adapters can be API interfaces (Application Programming Interface, application program interface), and each data adapter has a unique mapping relationship with the corresponding data converter, and has a unique corresponding connection address for receiving the corresponding data converter. A certain type of tracking data; that is, the data adapter of the data receiving layer corresponds to the data converter of the processing layer one by one, and the link addresses corresponding to different data adapters of the data receiving layer are provided externally, that is, the corresponding link address is generated according to the resource location of the data adapter. so that the client can select the corresponding link address according to the type of distributed link tracking tool to send the tracking data to the proxy service, and then the data reported to different link addresses will be processed by different data converters, that is, Different adapters have different data receiving adaptation layers, and different receiving adaptation layers have different reporting addresses, and then use different reporting addresses to distinguish different adapters. The above link address may be a url (uniform resource locator, uniform resource locator).

In this embodiment, after converting the tracking data into a preset data format to obtain the corresponding target format data, the method may further include: sorting the target format data according to the preset data structure, so as to obtain the sorted data. data; cache the sorted data to the terminal where the proxy service is located. That is, the proxy service caches the converted target format data, and the above-mentioned preset data structures may include but are not limited to a queue (queue), a memory map (mmap-queue), and a database (datebase). Select the cache format of the data; the cache can enhance the ability to cope with network fluctuations, improve the ability to cope with the failure of data reporting caused by network fluctuations, and improve the success rate of reporting data.

Step S12 : reporting the target format data to the target server through the proxy service, so that the target server can analyze the target format data.

In this embodiment, after obtaining the above-mentioned target format data, the proxy service reports the target format data to the target server, so that the target server can analyze the target format data, and it is no longer necessary for the target service for each link tracking tool. Instead, use the link collection tool of the open source community to make the collected data compatible and report it, that is, collect, integrate, cache the reported data of various technologies, and then report it to the server in a standard format. It realizes the comprehensive utilization of current technology and is compatible with multi-data source reporting.

As can be seen from the above, in this embodiment, the tracking data collected by different types of distributed link tracking tools is obtained through the proxy service, and the tracking data is converted into a preset data format to obtain the corresponding target format data; The proxy service reports the target format data to the target server, so that the target server can analyze the target format data. Different distributed link tracking tools use different link tracking technologies, and different technologies support several different development languages. This application uses proxy services to collect tracking data in different languages from different types of distributed link tracking tools. After converting the format and reporting it to the server, it can support the data reporting of link tracking tools of different technologies, that is, it supports multi-language link data collection and reporting, and supports accepting links collected by all open source link tracking tools. Tracking data reporting increases the compatibility of multiple languages on the server, and can effectively reduce the number of connections on the server and improve the performance of the server.

The embodiment of the present application discloses a specific distributed link tracking method, as shown in FIG. 3 , the method may include the following steps:

Step S21 : Acquire tracking data collected by different types of distributed link tracking tools through a proxy service, and convert the tracking data into a preset data format to obtain corresponding target format data.

Step S22 : reporting the target format data to the target server constructed based on the application performance analysis platform through the proxy service according to the target data reporting method, so that the target server can analyze the target format data.

In this embodiment, the above-mentioned target server is a server constructed based on an application performance analysis platform (Application Performance Management, APM), the target format data is opentracing format data, and the opentracing format data is a unified format supported by the APM system. When the format data is reported, it is reported according to the target data reporting method. The target data reporting method is a Hyper Text Transfer Protocol (http, Hyper Text Transfer Protocol) reporting method, a serialization protocol (eg grpc protocol) reporting method, or a Kafka reporting method.

As a result, after the apm system is commercialized, when providing users with functions such as link tracking and performance analysis, users can freely choose the current open source link collection technology, and report the data to the proxy service, and the proxy service will analyze the data. After processing, it is reported to the server. And if the user has already used the link tracking related solution, the user can easily access the apm system through the proxy service, which is convenient for the fast upload of the tracking data. At the same time, by stripping the binding relationship between the server and the distributed link tracking tool through the proxy service, it can reduce the manpower to develop link data collection agents in different languages.

In this embodiment, before reporting the target format data to the target server through the proxy service according to the target data reporting method, the method may further include: acquiring a data reporting method configured by a preset configuration interface, and reporting the data to the target server. The reporting method is used as the target data reporting method; or, the pre-configured data reporting rules are queried according to the current project operating status of the proxy service, and the data reporting method that matches the project operating status is determined according to the data reporting rules. as the target data reporting method. That is, the user can configure the data reporting method through the preset configuration interface, and the proxy service can also query the pre-configured data reporting rules according to the project running status of the proxy service, and then determine the data reporting method that matches the project running status according to the data reporting rules. As the target data reporting method, the above data reporting rules are rules constructed based on project concurrency and transmission security requirements. For example, projects with simple access and average concurrency correspond to http reporting; projects that require data compression and higher transmission security requirements correspond to grpc reporting; projects with large data volumes and very large concurrency correspond to kafka reporting.

For the specific process of the foregoing step S21, reference may be made to the corresponding content disclosed in the foregoing embodiments, which will not be repeated here.

As can be seen from the above, in this embodiment, the proxy service reports the target format data to the target server constructed based on the application performance analysis platform according to the target data reporting method, so that the target server can perform the target format data on the target server. analyze. Therefore, the tracking data is reported to the target server according to the state of the proxy service or the preconfigured reporting method, which improves the flexibility of data reporting and also improves the performance of the proxy service.

Correspondingly, an embodiment of the present application also discloses a distributed link tracking device, as shown in FIG. 4 , the device includes:

The format conversion module 11 is used to obtain the tracking data collected by different types of distributed link tracking tools through the proxy service, and convert the tracking data to a preset data format to obtain the corresponding target format data;

The data reporting module 12 is configured to report the target format data to the target server through the proxy service, so that the target server can analyze the target format data.

In this embodiment, the tracking data collected by different types of distributed link tracking tools is obtained through the proxy service, and the tracking data is converted into a preset data format to obtain the corresponding target format data; The target format data is reported to the target server, so that the target server analyzes the target format data. Different distributed link tracking tools use different link tracking technologies, and different technologies support several different development languages. This application uses proxy services to collect tracking data in different languages from different types of distributed link tracking tools. After converting the format and reporting it to the server, it can support the data reporting of link tracking tools of different technologies, that is, it supports multi-language link data collection and reporting, and supports accepting links collected by all open source link tracking tools. Tracking data reporting increases the compatibility of multiple languages on the server, and can effectively reduce the number of connections on the server and improve the performance of the server.

In some specific embodiments, the format conversion module 11 may specifically include:

A data receiving unit, configured to determine a corresponding target data adapter from the proxy service according to the type of the distributed link tracking tool, and use the target data adapter to receive the distributed link tracking tool and report it after collection of the tracking data in the corresponding format;

In some specific embodiments, the format conversion module 11 may specifically include:

a format conversion unit, configured to determine a corresponding target data converter from the proxy service according to the type of the target data adapter, and use the target data converter to convert the tracking data received by the target data adapter Convert to the preset data format to get the corresponding target format data.

In some specific embodiments, the distributed link tracking apparatus may specifically include:

a configuration unit, configured to configure a corresponding data adapter and a data converter for each type of the distributed link tracking tool in the proxy service according to the type of the distributed link tracking tool;

A mapping relationship building unit, configured to build a mapping relationship for the data adapters and data converters corresponding to the distributed link tracking tool of the same type.

In some specific embodiments, the distributed link tracking apparatus may specifically include:

A link address display unit, configured to display the link address corresponding to the data adapter through the proxy service, so that the client can select the corresponding link address according to the type of the distributed link tracking tool to send the tracking data to the proxy service.

In some specific embodiments, the distributed link tracking apparatus may specifically include:

a data sorting unit, configured to sort the target format data according to a preset data structure to obtain sorted data;

A data cache unit, configured to cache the sorted data to the terminal where the proxy service is located.

In some specific embodiments, the data reporting module 12 may be specifically configured to report the target format data to the target server constructed based on the application performance analysis platform through the proxy service according to the target data reporting method;

Wherein, the target data reporting method is a hypertext transfer protocol reporting method, a serialization protocol reporting method or a Kafka reporting method.

In some specific embodiments, the data reporting module 12 may specifically include:

a first data reporting unit, configured to obtain a data reporting method configured by a preset configuration interface, and use the data reporting method as the target data reporting method;

The second data reporting unit is configured to query the pre-configured data reporting rules according to the current project running status of the proxy service, and determine a data reporting method that matches the project running status as the target according to the data reporting rules Data reporting method.

Further, the embodiment of the present application also discloses an electronic device, as shown in FIG. 5 , the content in the figure should not be considered as any limitation on the scope of use of the present application.

FIG. 5 is a schematic structural diagram of an electronic device 20 according to an embodiment of the present application. The electronic device 20 may specifically include: at least one processor 21 , at least one memory 22 , a power supply 23 , a communication interface 24 , an input and output interface 25 and a communication bus 26 . Wherein, the memory 22 is used to store a computer program, and the computer program is loaded and executed by the processor 21 to implement the relevant steps in the distributed link tracking method disclosed in any of the foregoing embodiments.

In this embodiment, the power supply 23 is used to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and external devices, and the communication protocol it follows is applicable Any communication protocol in the technical solution of the present application is not specifically limited here; the input and output interface 25 is used to obtain external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs, here No specific limitation is made.

In addition, the memory 22 is used as a carrier for resource storage, which can be a read-only memory, a random access memory, a magnetic disk or an optical disk, etc. The resources stored on the memory 22 include the operating system 221, the computer program 222, and the data 223 including the tracking data. The method can be short-term storage or permanent storage.

The operating system 221 is used to manage and control each hardware device and computer program 222 on the electronic device 20, so as to realize the operation and processing of the massive data 223 in the memory 22 by the processor 21, which can be Windows Server, Netware, Unix, Linux etc. The computer program 222 may further include a computer program that can be used to complete other specific tasks in addition to the computer program that can be used to complete the distributed link tracking method executed by the electronic device 20 disclosed in any of the foregoing embodiments.

Further, an embodiment of the present application further discloses a computer storage medium, where computer-executable instructions are stored in the computer storage medium, and when the computer-executable instructions are loaded and executed by a processor, the disclosure of any of the foregoing embodiments is realized. distributed link tracking method steps.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments may be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method.

The steps of a method or algorithm described in conjunction with the embodiments disclosed herein may be directly implemented in hardware, a software module executed by a processor, or a combination of the two. A software module can be placed in random access memory (RAM), internal memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other in the technical field. in any other known form of storage medium.

Finally, it should also be noted that in this document, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply these entities or that there is any such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

A distributed link tracking method, device, device and medium provided by the present invention have been introduced in detail above. Specific examples are used in this paper to illustrate the principles and implementations of the present invention. The description of the above embodiments is only used for In order to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, this specification The contents should not be construed as limiting the present invention.

Claims (10)

1. a distributed link tracing method, is characterized in that, comprises: Obtain the tracking data collected by different types of distributed link tracking tools through the proxy service, and convert the tracking data to a preset data format to obtain the corresponding target format data; The target format data is reported to the target server through the proxy service, so that the target server analyzes the target format data. 2. The distributed link tracking method according to claim 1, wherein the obtaining of the tracking data collected by different types of distributed link tracking tools through proxy service comprises: Determine the corresponding target data adapter from the proxy service according to the type of the distributed link tracking tool, and use the target data adapter to receive the data collected by the distributed link tracking tool and reported in a corresponding format. tracking data; Correspondingly, converting the tracking data to a preset data format to obtain corresponding target format data includes: Determine the corresponding target data converter from the proxy service according to the type of the target data adapter, and use the target data converter to convert the tracking data received by the target data adapter into a preset data format , to get the corresponding target format data. 3. The distributed link tracking method according to claim 2, characterized in that, before obtaining the tracking data collected by different types of distributed link tracking tools through proxy service, the method further comprises: According to the type of the distributed link tracking tool, a corresponding data adapter and data converter are respectively configured for each type of the distributed link tracking tool in the proxy service; A mapping relationship is constructed for the data adapters and data converters corresponding to the distributed link tracking tool of the same type. 4. The distributed link tracking method according to claim 3, characterized in that, after the mapping relationship is constructed for the data adapters and data converters corresponding to the distributed link tracking tools of the same type, the method further comprises: The link address corresponding to the data adapter is displayed through the proxy service, so that the client can select the corresponding link address according to the type of the distributed link tracking tool to send the tracking data to the proxy service. 5. The distributed link tracking method according to claim 1, wherein after converting the tracking data to a preset data format to obtain corresponding target format data, the method further comprises: Sorting the target format data according to a preset data structure to obtain sorted data; The sorted data is cached to the terminal where the proxy service is located. 6. The distributed link tracking method according to any one of claims 1 to 5, wherein the reporting the target format data to the target service through the proxy service comprises: Report the target format data to the target server constructed based on the application performance analysis platform through the proxy service according to the target data reporting method; Wherein, the target data reporting method is a hypertext transfer protocol reporting method, a serialization protocol reporting method or a Kafka reporting method. 7. The distributed link tracking method according to claim 6, wherein before reporting the target format data to the target server through the proxy service according to a target data reporting mode, further comprising: obtaining a data reporting method configured by a preset configuration interface, and using the data reporting method as the target data reporting method; Or, query a preconfigured data reporting rule according to the current project running status of the proxy service, and determine a data reporting method matching the project running status as the target data reporting method according to the data reporting rule. 8. A distributed link tracking device, comprising: a format conversion module, used for obtaining tracking data collected by different types of distributed link tracking tools through proxy services, and converting the tracking data to a preset data format to obtain corresponding target format data; A data reporting module, configured to report the target format data to a target server through the proxy service, so that the target server can analyze the target format data. 9. An electronic device, characterized in that, comprising: memory for storing computer programs; A processor for executing the computer program to implement the distributed link tracking method according to any one of claims 1 to 7. 10. A computer-readable storage medium, characterized by being used for storing a computer program; wherein the computer program implements the distributed link tracking method according to any one of claims 1 to 7 when the computer program is executed by a processor.

Images