CN102156733A - Search engine and method based on service oriented architecture - Google Patents
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Abstract
The invention relates to a search engine and a search method based on service oriented architecture (SOA). The search engine comprises a central node and unit nodes, wherein the central node is used for decomposing an inquiry task of a user according to node resource description information of the unit nodes, dispatching the inquiry of the user to corresponding unit nodes and displaying a search result to the user; and the unit nodes are used for searching according to the received inquiry of the user and returning the search result to the central node. By the search engine and the search method, the search engines of different levels can be organized better so as to form a large-scale distributed search service union which meets the requirements for instantaneity and accuracy of mass data searching.
Description
Technical field
The present invention relates to searching engine field, relate in particular to a kind of search engine and searching method based on Service-Oriented Architecture Based (SOA).
Background technology
Along with the application of WWW, the quantity of information in the internet is increasing.For the information in the searching for Internet, developed multiple search engine (Search Engine).Search engine is the information retrieval instrument in the internet, and it is collection network information and being organized in a particular manner, for the user provides retrieval service.Search engine can be considered as a network application software system.
In existing search engine, set up the index of concentrating usually by the online information in the collection device acquisition network of search engine, and to these information.When the user submits a query requests to, just, return user related information by this index of visit.But, this mode may be inapplicable in the environment of IPv6, this is because the online information amount may be increased sharply, brought very large difficulty for the collection and the processing of centralized search engine, and along with the enhancing of the real-time of online information, centralized search engine is difficult to upgrade in real time; More importantly be, centralized search engine can't obtain some complete secret or the disclosed information of part, thereby also can't handle these information.
Summary of the invention
In order to solve above-mentioned technical matters, the invention provides a kind of search engine and searching method based on SOA, being applied to IPv6 is in the Next Generation Internet of core technology, so that personalization and the specialized information retrieval service in the IPv6 network to be provided.
The invention provides a kind of search engine, comprising based on Service-Oriented Architecture Based:
Centroid is used for according to the node resource descriptor of cell node task being carried out in user's inquiry and decomposes, and user's inquiry is distributed to the units corresponding node; Search Results is presented to the user;
Cell node is used for searching for according to the user's who receives inquiry, and Search Results is back to Centroid.
In one example, Centroid comprises:
Network service registry and ADMINISTRATION SUBSYSTEM are used to accept registration and the receiving node resource description lastest imformation and the Search Results of cell node, and select the units corresponding node and user's inquiry is sent to the units corresponding node according to preset condition;
Retrieval subsystem is used to receive user's search need, to generating user's inquiry after user's the search need pre-service, and the degree of correlation of the node resource descriptor of computing unit node and user's inquiry, according to the value of the degree of correlation cell node is sorted; Search Results is presented to the user.
In one example, Centroid also comprises daily record excavation subsystem; Daily record is excavated subsystem and is comprised log database and log analyzer, and log analyzer is used for log database user's information is analyzed, to provide personalized service to the user.
In one example, Search Results being presented to the user specifically comprises: the product of the weight of the Search Results that retrieval subsystem returns according to cell node and the weight of this cell node is presented to the user after to all Search Results rearrangements.
In one example, network registry and ADMINISTRATION SUBSYSTEM are accepted the registration of cell node by web services definition language; Network registry and ADMINISTRATION SUBSYSTEM are described lastest imformation by the site resource of Simple Object Access Protocol receiving element node; Network registry and ADMINISTRATION SUBSYSTEM are by task and the receiving element node Search Results that return of Simple Object Access Protocol after cell node send to decompose.
In one example, cell node is used to realize the vertical search of domain-oriented or subject-oriented.
In one example, cell node is made up of a plurality of child nodes with distributed frame.
The invention provides a kind of searching method, comprising based on Service-Oriented Architecture Based:
Step 10, Centroid carries out the task decomposition according to the node resource descriptor of cell node to user's inquiry, and user's inquiry is distributed to the units corresponding node;
Step 20, cell node is searched for according to the user's who receives inquiry, and Search Results is back to Centroid;
Step 30, Centroid is presented to the user with Search Results.
In one example, Centroid comprises network service registry and ADMINISTRATION SUBSYSTEM and retrieval subsystem; Step 10 comprises:
Step 101, retrieval subsystem receive user's search need, to generating user's inquiry after user's the search need pre-service, and the degree of correlation of the node resource descriptor of computing unit node and user's inquiry, according to the value of the degree of correlation cell node are sorted;
Step 102, network service registry and ADMINISTRATION SUBSYSTEM are selected the units corresponding node and user's inquiry are sent to the units corresponding node according to preset condition;
Step 103, cell node is searched for according to user's inquiry, and Search Results is back to retrieval subsystem through network service registry and ADMINISTRATION SUBSYSTEM, and retrieval subsystem is presented to the user with Search Results.
In one example, Centroid also comprises daily record excavation subsystem; Daily record is excavated subsystem and is comprised log database and log analyzer; This searching method also comprises step 40: log analyzer is analyzed the information of user in the log database, to provide personalized service to the user.
In one example, in the step 103, Search Results is presented to the user specifically comprises:
The product of the weight of the Search Results that retrieval subsystem returns according to cell node and the weight of this cell node is presented to the user after to all Search Results rearrangements.
In one example, in the step 101, network registry and ADMINISTRATION SUBSYSTEM are also accepted the registration of cell node by web services definition language, site resource by Simple Object Access Protocol receiving element node is described lastest imformation, and by task and the receiving element node Search Results that return of Simple Object Access Protocol after cell node send to decompose.
In one example, cell node is used to realize the vertical search of domain-oriented or subject-oriented.
In one example, cell node is made up of a plurality of child nodes with distributed frame.
The invention enables cell node to retrieve, can provide network information retrieval service personalized, specialized, mobilism for the user towards different realm informations; Can preferably the search engine of different levels be organized, form extensive, distributed search service association; Have module definition and good extensibility and operability clearly, real-time, accuracy demand that can the satisfying magnanimity data retrieval; Centroid disperses the network information to handle to each local cell node, has alleviated the burden of Centroid greatly, and the information of a local cell node processing section can be finished the demand that system real time is satisfied in work of treatment efficiently simultaneously; Cell node (as personal desktop's search engine, the search engine of enterprise) can have the authority of some online application apparatus information of visit.
Description of drawings
Come the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is the distributed search engine schematic diagram based on SOA of the embodiment of the invention;
Fig. 2 is the distributed search engine structural drawing based on SOA of the embodiment of the invention.
Embodiment
According to the search engine based on SOA of the present invention basic thought as shown in Figure 1, each cell node adopts 2 network services of web services definition language (WSDL) standard packaging (Web Service) respectively, finish node registering and node resource respectively and describe update service (RegUpdate) and subject retrieval service (Search), and be distributed on the registration center of Centroid respectively; Call Web Service by Simple Object Access Protocol (SOAP) and realize that the one-level retrieval between Centroid and the cell node communicates by letter.
Search engine based on SOA according to the present invention is made up of a Centroid and some cell nodes, as shown in Figure 2, adopts Web Service to carry out alternately by internet (Internet) between Centroid and the cell node.Wherein, Centroid also has the function that merges each cell node Search Results except having basic unit searches function, specifically comprise:
1), Centroid is according to the log-on message (index webpage sum, user's clicking rate, the degree of correlation etc.) of each cell node, for each cell node manually is provided with weight, the weight of remembering i cell node is ω
i
2), cell node carries out weight calculation to each bar result that inquiry obtains, calculating can be adopted existing Okapi-BM25 formula, the big more representative result of weight is relevant more with inquiry; Cell node also must carry out normalized to weight before Centroid sends Query Result, for convenience of explanation, remember that i the j bar Query Result weight that cell node returned is W
Ij
3), Centroid is the weight of the cell node multiplied by weight with Search Results, obtains new weight, the j bar Query Result for i cell node returns promptly has: W '
Ij=ω
i* W
IjAll calculate finish after, Centroid according to weights W ' size Search Results is sorted.
Each cell node can independently be realized the Webpage search service, all is the independent search engine of complete function, and the search of its realization is called " one-level retrieval "." one-level retrieval " main domain-oriented or subject-oriented are realized vertical search; Different cell nodes is towards different fields or theme.Cell node carries out independent design and research and development towards different field or theme.Cell node log-on message and maintenance information and " one-level retrieval " result describe (web search principal character) information respectively as shown in Table 1 and Table 2.
Table 1
Table 2
Search engine based on SOA according to the present invention has level, and the level of Centroid is higher than the requirement of cell node, and cell node also can layering.When a user submits an inquiry to, Centroid according to this user profile (as the region, place, age, educational background, query history, click historical), the feature of user right, inquiry etc., and according to the log-on message of each cell node cell node is carried out relatedness computation and screens interdependent node.Calculate the vector space model (vector space model is called for short VSM) that adopts in the information retrieval, concrete grammar is as follows:
1), the cell node resource description information on the Centroid is divided into resource description information the sequence of being made up of several entries based on the dictionary participle, carry out the entry processing, the resource description information of note cell node is d, and the resource description information d after the entryization can represent to become corresponding vector
2), the entry processing is carried out in user's inquiry, based on the dictionary participle inquiry is divided into the entry sequence, the note inquiry is q, the inquiry after the entryization become n entry k1, k2 ..., kn, inquiry q can represent to become the vector of correspondence
3), the resource description information of cell node is very short usually, the inquiry of user's input also can be used as one piece of extremely short document, thereby the correlativity of inquiry and cell node judges that the similarity can be considered between document calculates, and can come the cell node degree of correlation is carried out rank by asking the given query vector and the cosine similarity of each cell node resource description information vector.Degree of correlation between cell node k and the inquiry q can be calculated by following formula:
4), Centroid carries out from big to small ordering according to the degree of correlation score value that calculates gained to cell node, automatically select the top n user to have access rights cell node (wherein N is the systemic presupposition value), and these cell nodes are handed in user profile, user right, inquiry.
Cell node is checked user right, and analysis user information and query string can continue to pass to the cell node of bottom more to these information, and perhaps by the local index of visit, return results returns net result after finally by Centroid the result being merged.The query requests information format is as shown in table 3.
Table 3
As shown in Figure 2, Centroid is in conjunction with the principle of work and the SOA Architecture characteristic of HASH formula distribution search engine, and by Web Service registration and ADMINISTRATION SUBSYSTEM, 2-level search subsystem and daily record are excavated these 3 functional entitys of subsystem and realized.
Web Service registration and ADMINISTRATION SUBSYSTEM are used to accept the RegUpdate of cell node and the registration message of Search 2 class Web Service, monitoring unit node presence; The site resource descriptor of receiving element node is described information updating and storage.The WSDL registered standard of Web Service registration and ADMINISTRATION SUBSYSTEM employing Web Service receives the Web Service registration with the response unit node; Adopt the SOAP service call standard of WebService to call the RegUpdate service, receive the site resource descriptor that RegUpdate returns.The site resource descriptor is as shown in table 4.
Table 4
The 2-level search subsystem is used to receive user's search need information, and carry out pre-service, preprocessing process comprises: participle, stop words filter, query word is expanded and query type is resolved (as search in search, the special time scope in the website, sortord etc.), generate the inquiry of preparing to be distributed to cell node; Inquire about distribution based on the site resource descriptor, according to relevance degree with cell node by sorting from big to small, and pretreated inquiry and user profile and authority sent to top n cell node (wherein N is the systemic presupposition value); Call corresponding unit retrieval service Search, receive and return one-level retrieving information as shown in table 2 based on theme; " one-level retrieval " information of different cell node retrievals is carried out information fusion to be handled: to each bar Search Results, with the multiplied by weight of its weight with cell node, obtain new weight, and sort according to this weight; " one-level retrieval " information that merges is carried out the index second time, promptly set up the second level index database that is used to deposit " one-level retrieval " information, the Search Results after handling is deposited in the index database of the second level in this locality; From the index database of the second level, read final result for retrieval, with its tissue and present to the user.It has the user interactions interface, is used for the interface that the user submits Search Requirement information to and presents result for retrieval information; Also have the one-level Retrieval Interface, call Web Service (Search) for the 2-level search subsystem by the SOAP standard, and return the one-level retrieving information;
Daily record is excavated subsystem and is comprised user behavior log database and log analyzer; Log database is collected user's various information, as log-on message, and access history etc.; Log analyzer analysis user data are created the access module that meets user personality; In conjunction with user personality, provide the personalized service that meets its specific demand to the user; The user makes feedback information to the service that search engine provides, and search engine is served according to the feedback information adjustment; Mutual by what move in circles between user and the system, search engine finally can be provided personalized service for the user.
Wherein, realizing according to the following steps alternately between Centroid and the cell node:
Step 1, Centroid carries out the demand information pre-service based on the search need information that the user submits to, generates the inquiry of preparing to be distributed to cell node after the pre-service;
Step 2, Centroid are utilized vector space model (VSM), and inquiry is carried out relatedness computation with the node resource descriptor of each cell node.After calculating was finished, Centroid sorted to cell node from big to small by degree of correlation score value, and inquiry is distributed to the cell node (the N value is by manually preestablishing) that the top n user has access rights;
Step 3, cell node are carried out " one-level retrieval ", and the result that will search for returns to Centroid;
Step 4, Centroid are handled each bar Search Results after receiving Search Results, and its weight is obtained new weight with the cell node multiplied by weight, and the line ordering of going forward side by side is set up in " secondary index storehouse ";
Step 5, Centroid reads search result corresponding and presents to the user from " secondary index storehouse ", finishes " 2-level search ".
The above only is a preferred implementation of the present invention, but protection domain of the present invention is not limited thereto.Any those skilled in the art all can carry out suitable change or variation to it in technical scope disclosed by the invention, and this change or variation all should be encompassed within protection scope of the present invention.
Claims (14)
1. the search engine based on Service-Oriented Architecture Based is characterized in that, comprising:
Centroid is used for according to the node resource descriptor of cell node task being carried out in user's inquiry and decomposes, and user's inquiry is distributed to the units corresponding node; Search Results is presented to the user;
Cell node is used for searching for according to the user's who receives inquiry, and Search Results is back to Centroid.
2. search engine as claimed in claim 1 is characterized in that Centroid comprises:
Network service registry and ADMINISTRATION SUBSYSTEM are used to accept registration and the receiving node resource description lastest imformation and the Search Results of cell node, and select the units corresponding node and user's inquiry is sent to the units corresponding node according to preset condition;
Retrieval subsystem is used to receive user's search need, to generating user's inquiry after user's the search need pre-service, and the degree of correlation of the node resource descriptor of computing unit node and user's inquiry, according to the value of the degree of correlation cell node is sorted; Search Results is presented to the user.
3. search engine as claimed in claim 2 is characterized in that, Centroid also comprises daily record excavation subsystem; Daily record is excavated subsystem and is comprised log database and log analyzer, and log analyzer is used for log database user's information is analyzed, to provide personalized service to the user.
4. as claim 2 or 3 described search engines, it is characterized in that, Search Results is presented to the user specifically comprise: the product of the weight of the Search Results that retrieval subsystem returns according to cell node and the weight of this cell node is presented to the user after to all Search Results rearrangements.
5. as claim 2 or 3 described search engines, it is characterized in that network registry and ADMINISTRATION SUBSYSTEM are accepted the registration of cell node by web services definition language; Network registry and ADMINISTRATION SUBSYSTEM are described lastest imformation by the site resource of Simple Object Access Protocol receiving element node; Network registry and ADMINISTRATION SUBSYSTEM are by task and the receiving element node Search Results that return of Simple Object Access Protocol after cell node send to decompose.
6. as claim 1,2 or 3 described search engines, it is characterized in that cell node is used to realize the vertical search of domain-oriented or subject-oriented.
7. as claim 1,2 or 3 described search engines, it is characterized in that cell node is made up of a plurality of child nodes with distributed frame.
8. the searching method based on Service-Oriented Architecture Based is characterized in that, comprising:
Step 10, Centroid carries out the task decomposition according to the node resource descriptor of cell node to user's inquiry, and user's inquiry is distributed to the units corresponding node;
Step 20, cell node is searched for according to the user's who receives inquiry, and Search Results is back to Centroid;
Step 30, Centroid is presented to the user with Search Results.
9. searching method as claimed in claim 8 is characterized in that, Centroid comprises network service registry and ADMINISTRATION SUBSYSTEM and retrieval subsystem; Step 10 comprises:
Step 101, retrieval subsystem receive user's search need, to generating user's inquiry after user's the search need pre-service, and the degree of correlation of the node resource descriptor of computing unit node and user's inquiry, according to the value of the degree of correlation cell node are sorted;
Step 102, network service registry and ADMINISTRATION SUBSYSTEM are selected the units corresponding node and user's inquiry are sent to the units corresponding node according to preset condition;
Step 103, cell node is searched for according to user's inquiry, and Search Results is back to retrieval subsystem through network service registry and ADMINISTRATION SUBSYSTEM, and retrieval subsystem is presented to the user with Search Results.
10. searching method as claimed in claim 9 is characterized in that, Centroid also comprises daily record excavation subsystem; Daily record is excavated subsystem and is comprised log database and log analyzer; This searching method also comprises step 40: log analyzer is analyzed the information of user in the log database, to provide personalized service to the user.
11. the searching method as claim 9 or 10 is characterized in that, in the step 103, Search Results is presented to the user specifically comprise:
The product of the weight of the Search Results that retrieval subsystem returns according to cell node and the weight of this cell node is presented to the user after to all Search Results rearrangements.
12. searching method as claim 9 or 10, it is characterized in that, in the step 101, network registry and ADMINISTRATION SUBSYSTEM are also accepted the registration of cell node by web services definition language, site resource by Simple Object Access Protocol receiving element node is described lastest imformation, and by task and the receiving element node Search Results that return of Simple Object Access Protocol after cell node send to decompose.
13. the searching method as claim 9 or 10 is characterized in that, cell node is used to realize the vertical search of domain-oriented or subject-oriented.
14., it is characterized in that cell node is made up of a plurality of child nodes with distributed frame as claim 8,9 or 10 searching method.
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| CN102968466A (en) * | 2012-11-09 | 2013-03-13 | 同济大学 | Indexing network construction method and indexing network constructor based on webpage classification |
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Application publication date: 20110817 |