CN101741904B - Method for building distributed space computation service node and gateway device - Google Patents
Method for building distributed space computation service node and gateway device Download PDFInfo
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Abstract
The invention discloses a method for building a distributed space computation service node and a gateway device for fusing various platforms to provide the space computation service. The method comprises the following steps: performing asynchronous call on space computing resources based on a Web service structure; according to the order of first in first out, responding to an event in a multithreading mode, and realizing corresponding functions of the event; configuring a connector actually connected with the computing resources through configuring a file, and realizing the connection with the actual computing resources. The owner of the space computing resources can simply provide the owned computing resources on different platforms and systems, and the space computing resources are subjected to servitization by a node building tool to form the space computing service with unified self-described interfaces.
Description
Technical field
The present invention relates to Web GIS-Geographic Information System (GIS) and Web remote sensing technology, relate in particular to a kind of construction method and gateway apparatus of distributed space computation service node.
Background technology
At present existing development approach and system based on geography information network service framework although function has his own strong points, mostly depend on specific GIS software, have in addition rely on specific operating system, can not support cluster and parallel computation environment.
Existing development technique based on geography information network service framework includes the database that exploitation GIS-Geographic Information System web service framework is used at present, includes spatial data in this database.In addition, the web service framework of GIS-Geographic Information System provides the network service of a GIS-Geographic Information System to the user.The network service of combining geographic information system based on the GIS function.The function that the user accesses GIS-Geographic Information System is to use the network service of this GIS-Geographic Information System.
Present existing geographical information system interface service technology, data basis based on the GIS interface service, GIS interface wherein, be complementary with the application system of outside, for outside application system GIS interface service function, so that the information relevant with the application system of outside positions and distribution etc. at GIS.
The technology of setting up of existing a kind of mesh services group and the discovery technique of mesh services pass through between some GIS examples alternately at present, generate service groups member tabulation and set up cascade net to connect the afterwards foundation of completion service group.Grid services discovery technology wherein, the GIS example is after receiving the service-seeking request, when having the service groups of this COS, the member that to judge described GIS example be service groups then is transmitted to request other members of service groups, otherwise request is transmitted to arbitrary member of service groups, is transmitted to other members by this member.This grid services discovery technology has improved the efficient of service-seeking, has avoided the long and large defective of network overhead of the response time that the method for inundation is brought in the prior art.
Existing method respectively has the impetus of oneself, but often rely on specific GIS software, rely on specific operating system, can not support cluster and parallel computation environment, these methods concentrate on the database manipulation for geography information, so underaction, because actual geography information file format and space computation requirement are diversified.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of construction method and gateway apparatus of distributed space computation service node, provides the space calculation services to merge kinds of platform.
In order to solve the problems of the technologies described above, the invention provides a kind of distributed space computation service node construction method, comprising:
The Web-based services structure is carried out asynchronous call to space computing resources;
According to the order of first-in first-out, event is responded the corresponding function of realization event in the mode of multithreading;
Dispose the connector of actual connection computational resource by configuration file, realize and being connected of Practical Calculation resource.
Preferably, described space computing resources is carried out the step of asynchronous call, comprising:
User's computation requirement is packaged into the calculation task of describing with extend markup language;
By predefined Web service interface described calculation task is submitted to space computation service node, generation has the uniquely identified task instances;
By starting and control the operation of described task instances, until carrying out, described task instances finishes the rear execution result that reclaims by the user.
Preferably, each task-cycle of node itself and node deploy monitored and management.
Preferably, according to the order of first-in first-out,, comprising the step that event responds in the mode of multithreading:
User request and system state change are joined event queue as event, according to the order of first-in first-out, in the mode of multithreading event is responded.
In order to solve the problems of the technologies described above, the present invention also provides a kind of gateway apparatus of distributed space computation service node, comprises space calculation services unified interface, node gateway engine and resource interface, wherein:
Described space calculation services unified interface, the Web-based services structure is used for space computing resources is carried out asynchronous call;
Described node gateway engine links to each other with described space calculation services unified interface, is used for the order according to first-in first-out, event is responded the corresponding function of realization event in the mode of multithreading;
Described resource interface links to each other with described node gateway engine, adopts plug-in unit-configuration structure, and by the actual connector that connects computational resource of configuration file configuration, realization is connected with the Practical Calculation resource.
Preferably, according to the self descriptiveness of extend markup language, described space calculation services unified interface possesses the ability of self-described.
Preferably, described node gateway engine is used for employed task description and configuration file provide when setting up task configuration information and seeks the computational resource interface and support class, to realize and being connected of this kind computational resource.
Preferably, described node gateway engine support table plane system, condor or cluster computational resource platform are supported Linux or Windows operating system.
Preferably, this device further comprises:
Node monitors and management services module, is used for providing each task-cycle to described service node and described service node deploy to monitor and management.
Technical solution of the present invention has mainly been carried out systematically Design and implementation in the Distributed Calculation of space calculation services and the space calculating of Webization, a kind of strong and wieldy technological means is provided, so that the various different platforms that the owner of space computing resources can have it simply, computational resource on the different system provides, by node the build tool with its serviceization, formation has the space calculation services of unified self-described interface, can be fairly simplely by middleware and simply configuration be installed, communicate with other space computation service nodes that identical middleware and similar configuration are installed, form the distributed spatial computing environment of the many back-up environments of multinode, overcome conventional art and product deficiency in this respect.The user of space W eb calculation services can need not install other plug-in units and just can use easily these space calculation services by any browser.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in specification, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the space computation service node gateway apparatus example structure schematic diagram that the present invention proposes;
Fig. 2 is that the logic of space shown in Figure 1 calculation services unified interface is carried out schematic diagram;
Fig. 3 is the schematic flow sheet of distributed space computation service node construction method embodiment of the present invention.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, how the application technology means solve technical problem to the present invention whereby, and the implementation procedure of reaching technique effect can fully understand and implements according to this.
Need to prove that if do not conflict, each feature among the embodiment of the invention and the embodiment can mutually combine, all within protection scope of the present invention.In addition, can in the computer system such as one group of computer executable instructions, carry out in the step shown in the flow chart of accompanying drawing, and, although there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
The model that calls that traditional Web space calculation services adopts all is synchronization call basically, and namely caller can get clogged when calling the space calculation services, could continue execution until calculation services is finished the work after control returned to caller.This synchronization call can be brought a series of problem, and wherein the most serious is timeout issue.In order to address the above problem, the defective large for prior art space calculation services amount of calculation, that computing time is long, the present invention adopts the Asynchronous Invocation Model of space calculation services when the Web space computation service node makes up.
Fig. 1 is the composition schematic diagram of the space computation service node gateway apparatus embodiment that proposes of the present invention.As shown in Figure 1, this device embodiment comprises that mainly space calculation services unified interface 110, node gateway engine 120, resource interface 130, node monitor and management services module 140, wherein:
Space calculation services unified interface 110, Web-based services (Service) structure is used for space computing resources is carried out asynchronous call;
Because to calculate common amount of calculation large in the space, computing time is long, and the synchronization call pattern of traditional Web Service is owing to overtime restriction and can't be as the unified interface of space calculation services; Above-mentioned space calculation services unified interface 110, structure based on traditional Web Service, be used for space computing resources is carried out asynchronous call, and give the ability of these above-mentioned space calculation services unified interface 110 self-describeds, make things convenient for the use of space calculation services.
Self descriptiveness originally refers to a feature of extend markup language (XML) document, and namely XML document comprises a DTD usually, thereby XML document is self-described.Not only the people can understand XML document, and computer also can be processed.XML represents that the mode of data really accomplished to be independent of application system, and data can be reused.XML document is counted as the data base system of document and the documenting of data.In the present invention, utilized this technology to realize the self-described of space calculation services interface.
Consider from the aspects such as convenience of efficient and use, the basic implementation procedure of the asynchronous mode of space calculation services unified interface 110 is: user's computation requirement is encapsulated into a calculation task of describing with extend markup language (XML), this calculation task is submitted to space computation service node by a Web Service interface that pre-defines, generate the task instances with unique identification (ID), and by the user by starting and control the operation of this task instances, until task instances is carried out the result who reclaims again tasks carrying after finishing.
Specifically, space calculation services unified interface 110 provides following functions for the user of service, to satisfy the demand of foundation, destruction and control task:
Set up (Create): set up a new space Task instance according to the task description that the user provides, and return to identify unique ID of this task instances.
Start (Start): start the operation of a task instances, according to the Determines of the platform that service is provided and system when and use which resource to move this task instances node gateway engine 120 will be.
Suspending/resuming (Pause/resume): the operation of a task instances of suspending/resuming, just can use when only having task to realize supporting suspending/resuming, that is to say that some task can not be suspended/recover.
Finish (Terminate): force to finish the operation of a task instances.
Destroy (Destroy): the example of destroying a task.
Except the needed interface of top these control tasks, space calculation services unified interface 110 has also defined following function, to realize that the user is to the more control ﹠ monitor of task:
Parameter arranges (setParameter): task instances is set moves needed parameter, parameter will be according to its type autocoding, the data type (namely can by automatically the data type of encoding and decoding) that parameter current/result transmits support has: Java simple types, character string, iava beans, and the array of the above-mentioned type.
Parameter reads (getParameter): the parameter that reads the task instances operation.
The result obtains (getResult): the result who obtains the task instances operation.Need to prove that task instances not necessarily must be finished in arrival (finished) state just has the result to export, the getResult interface also just can read the task instances operation result at any time, if the result not yet exports, then returns a null value.
State obtains (getStatus): obtain the running status of task instances, client can poll to obtain the state of task instances.
Message is obtained (getMessage): read the message of exporting in the task instances running, these message are by the code setting of task.
Above-mentioned functions is all called by Web Service mode, has clear and definite web services definition language (WSDL) and describes, and provide some clients to support the storehouse, makes things convenient for its use.
The event of node gateway engine 120 definition comprises that the task start event of the task creation request event of task is set up in request, event, request initiating task are finished in the task creation of setting up of finishing the work task start request event, initiating task, the task of finishing the work finish the mission failure event of event and expression mission failure etc.The function that node gateway engine 120 defined computational resources are realized comprises following several:
Task start (startJob): start the operation of a task instances.
Task termination (terminateJob): stop the operation of a task instances.
Task initialization (onCreate): when task instances is established, call, before the task instances actual motion, corresponding computational resource is carried out initialized mechanism to provide a kind of.
Task detach (onDestroy): before task instances is destroyed, call, so that a kind of mechanism of before destroying corresponding computational resource being removed (Cleanup) at task instances to be provided.
Task suspension (stopJob): suspend the operation of a task instances.
Task recovery (resumeJob): the operation that recovers a task instances that is suspended.
Wherein startJob must possess functional realization, can access operation with the assurance task; And all the other several functions computational resource do not need or situation about not supporting under can adopt empty the realization.
Simultaneously, node gateway engine 120 also provides the necessary task instances of task run contextual definition.The information such as ID, description, parameter, state, message, result that comprise task instances in the task instances context have also indicated task instances in the task instances context simultaneously and have depended on which kind of computational resource interface support.
The computational resource interface of realizing can be configured by an XML file, the configuration information that employed task description and this configuration file provided when node gateway engine 120 can be set up task according to the user is sought suitable computational resource interface and is supported class, to realize and being connected of this kind computational resource, can the support table plane system, condor and three kinds of different computational resource platforms of cluster, and two kinds of different operating systems of Linux, Windows.
Node monitors and management services module 140, links to each other with this node gateway engine 120, is used for providing each task-cycle to node itself and node deploy to monitor and management that groundwork comprises as follows:
Obtain the node relevant information, comprise static information (such as node architecture, operating system, platform release etc.) and multidate information (such as node present load etc.); Obtain the situation of node deploy task, comprise task is tabulated and carried out task according to some conditions (such as task name, task characteristic etc.) and search, and the task deployment means of providing convenience; Obtain task interface, use for user's calling task.Instrument is provided simultaneously, automatically generates the client of calling the calculation services task according to known task interface.
Fig. 2 is that the logic of space shown in Figure 1 calculation services unified interface is carried out schematic diagram.In conjunction with gateway apparatus embodiment shown in Figure 1, logic shown in Figure 2 is carried out schematic diagram and is mainly comprised the steps:
Step S210 sets up (create) new space Task instance according to the task description that the user provides, and finishes initialization (initialized);
Step S220 starts the operation of (Start) this task instances, is in afterwards operation (running) state;
Step S230 in operation (running) process, can suspend (Pause) operation to the part tasks carrying; After carrying out time-out (pause) operation, task instances is in time-out (pause) state;
Step S240 carries out recovery operation to the task instances that is in time-out (pause) state, returns to operation (running) state;
Need to prove to only have the part task to support suspending/resuming (pause/resume) function;
Step S250, be in operation (running) state and realizing that (accomplish) afterwards, enters (finished) state of finishing, can execution in step S280, destroy (Destroy) task instances, this task instances is in does not have (Not Exist) state.
Shown in step S260 among Fig. 2, in initialization (initialized) process, operation (running) state or time-out (pause) state, can force to finish the operation of (Terminate) this task instances, this moment, task instances was in failure (failed) state.
Shown in step S270, in operation (running) state, may be because of unusual (exception) state so that task instances be in failure (failed) state.
At failure (failed) state or finish (finished) state, can execution in step S280, destroy (Destroy) task instances, this task instances is in does not have (Not Exist) state.
There is not (Not Exist) state when task instances is in, illustrates that this is a new task instances that rises, and gets back to step S210.
Fig. 3 is the schematic flow sheet of distributed space computation service node construction method embodiment of the present invention.Carry out in conjunction with gateway apparatus embodiment shown in Figure 1 and logic shown in Figure 2, the inventive method shown in Figure 3 mainly comprises the steps:
Step S310, the Web-based services structure is carried out asynchronous call to space computing resources;
Step S320 according to the order of first-in first-out, responds the corresponding function of realization event in the mode of multithreading to event;
Step S330 disposes the connector of actual connection computational resource by configuration file, realizes and being connected of Practical Calculation resource.
Above-mentioned described space computing resources is carried out the step of asynchronous call, mainly comprises:
User's computation requirement is packaged into the calculation task of describing with extend markup language;
By predefined Web service interface described calculation task is submitted to space computation service node, generation has the uniquely identified task instances;
By starting and control the operation of described task instances, until carrying out, described task instances finishes the rear execution result that reclaims by the user.
In the embodiment of the method shown in Figure 3, can monitor each task-cycle of node itself and node deploy and management.
Above-mentioned order according to first-in first-out, the step so that the mode of multithreading responds event can comprise:
User request and system state change are joined event queue as event, according to the order of first-in first-out, in the mode of multithreading event is responded.
The present invention is being different from existing technology aspect the purpose of the space calculating of the Distributed Calculation that reaches the space calculation services by the structure space computation service node and Webization.Therefore core inventive point of the present invention is exactly to make up space computation service node with the process of the Distributed Calculation of implementation space calculation services, and the computational resource interface support method of the Asynchronous Invocation Model of space calculation services, various different platforms etc.
The inventive method adopts Service-Oriented Architecture Based (SOA) basic theories model and Web service technological frame, utilize the technology such as Java technology and service encapsulates, go for multiple GIS-Geographic Information System (GIS), it is inadequate to have overcome well present grid computing technology flexibility, the shortcoming that autgmentability is poor, and effectively support the migration under grid environment of running environment and application program, also support simultaneously original Grid Computing Model.The inventive method can so that application system can be utilized GIS well under the prerequisite of not revising application system, greatly reduce the realization cost.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into respectively each program module, perhaps a plurality of modules in them or step are made into single program module and realize.
Although the disclosed execution mode of the present invention as above, the execution mode that described content just adopts for the ease of understanding the present invention is not to limit the present invention.Technical staff in any the technical field of the invention; under the prerequisite that does not break away from the disclosed spirit and scope of the present invention; can do any modification and variation in the details that reaches of implementing in form; but scope of patent protection of the present invention still must be as the criterion with the scope that appending claims was defined.
Claims (8)
1. a distributed space computation service node construction method is characterized in that, comprising:
The Web-based services structure is carried out asynchronous call to space computing resources; Specifically comprise: user's computation requirement is packaged into the calculation task of describing with extend markup language; By predefined Web service interface described calculation task is submitted to space computation service node, generation has the uniquely identified task instances; By starting and control the operation of described task instances, until carrying out, described task instances finishes the rear execution result that reclaims by the user;
According to the order of first-in first-out, event is responded the corresponding function of realization event in the mode of multithreading;
Dispose the connector of actual connection space computational resource by configuration file, realize and being connected of space computing resources.
2. the method for claim 1 is characterized in that:
Each task-cycle to space computation service node itself and space computation service node deploy monitors and management.
3. the method for claim 1 is characterized in that, according to the order of first-in first-out,, comprising the step that event responds in the mode of multithreading:
User request and system state change are joined event queue as event, according to the order of first-in first-out, in the mode of multithreading event is responded.
4. the gateway apparatus of a distributed space computation service node is characterized in that, comprises space calculation services unified interface, node gateway engine and resource interface, wherein:
Described space calculation services unified interface, the Web-based services structure is used for space computing resources is carried out asynchronous call; Specifically comprise: user's computation requirement is packaged into the calculation task of describing with extend markup language; By predefined Web service interface described calculation task is submitted to space computation service node, generation has the uniquely identified task instances; By starting and control the operation of described task instances, until carrying out, described task instances finishes the rear execution result that reclaims by the user;
Described node gateway engine links to each other with described space calculation services unified interface, is used for the order according to first-in first-out, event is responded the corresponding function of realization event in the mode of multithreading;
Described resource interface links to each other with described node gateway engine, adopts plug-in unit-configuration structure, disposes the connector of actual connection space computational resource by configuration file, realizes and being connected of space computing resources.
5. device as claimed in claim 4 is characterized in that:
According to the self descriptiveness of extend markup language, described space calculation services unified interface possesses the ability of self-described.
6. device as claimed in claim 4 is characterized in that:
Described node gateway engine is used for employed task description and configuration file provide when setting up task configuration information and seeks the computational resource interface and support class, to realize and being connected of this kind computational resource.
7. device as claimed in claim 6 is characterized in that:
Described node gateway engine support table plane system, condor or cluster computational resource platform are supported Linux or Windows operating system.
8. device as claimed in claim 4 is characterized in that, this device further comprises:
Node monitors and management services module, is used for providing each task-cycle to described space computation service node and described space computation service node deploy to monitor and management.
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| CN102262541A (en) * | 2011-08-12 | 2011-11-30 | 北京思创银联科技股份有限公司 | Method for starting dynamic configuration plug-in |
| CN102508639B (en) * | 2011-10-10 | 2014-04-02 | 北京邮电大学 | Distributed parallel processing method based on satellite remote sensing data characteristics |
| CN102523249A (en) * | 2011-11-24 | 2012-06-27 | 哈尔滨工业大学 | Distributed long-distance simulation system and simulation method based on Web |
| CN102710441B (en) * | 2012-05-31 | 2014-04-02 | 朱峻茂 | Uniform-interface-based multi-platform information acquisition method and information acquisition system |
| CN104424157A (en) * | 2013-08-24 | 2015-03-18 | 镇江金钛软件有限公司 | Service construction method |
| CN105791354A (en) * | 2014-12-23 | 2016-07-20 | 中兴通讯股份有限公司 | Job scheduling method and cloud scheduling server |
| CN106651008A (en) * | 2016-11-23 | 2017-05-10 | 长江水利委员会水文局 | Universal network service constructing method for hydrologic forecasting |
| CN113810977B (en) * | 2020-06-11 | 2024-06-07 | 中国移动通信有限公司研究院 | Method, system, node and medium for generating computing force topology |
| CN114338283A (en) * | 2021-12-07 | 2022-04-12 | 珠海格力电器股份有限公司 | Web-based configurable gateway, equipment control method and readable storage medium |
| CN116149621A (en) * | 2023-04-21 | 2023-05-23 | 云账户技术(天津)有限公司 | Access method, system, equipment and medium of bank virtual account |
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