CN102289473B - Device and method for paging query of a plurality of servers - Google Patents
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Abstract
The invention discloses a device for paging query of a plurality of servers. The device comprises an agent module and server processing objects, wherein the agent module is used for generating the server processing objects for each server, ordering the server processing objects into an ordered table, acquiring a data starting position and data total amount, which are in accordance with query conditions, of each server from each server processing object, creating a position mapping table, setting the amount of data required to be acquired on the server processing objects and a starting position where the data is fetched according to paging conditions and a correspondence relation between the position mapping table and the ordered table, and informing the server processing objects to acquire the data from the corresponding servers; and each server processing object is used for acquiring the data total amount, which meets the query conditions, of the corresponding server, acquiring the data and returning the data to the agent module according to the amount of the data required to be acquired from the corresponding server and the starting position where the data is fetched. The invention also discloses a method for paging query of the plurality of servers. By the invention, operating flows for paging query of the plurality of servers can be simplified.
Description
Technical field
The present invention relates to the paging query technology based on server, relate in particular to a kind of device and method of multiserver paging query.
Background technology
At present, when a plurality of servers carry out paging query, generally according to the result of current server inquiry, obtain the condition that next server lookup needs, thereby next server is carried out paging query again simultaneously.For example, need to be in server A, inquire about on the B, querying condition is Q, need to carry out paging to Query Result, every page shows 50 data, the data that server A satisfies querying condition Q have 20, the data that server B satisfies querying condition Q have 60, if first querying server A then needs the Query Result according to server A, namely can get 20 data on the server A, as the condition that server B is inquired about, thereby could determine that server B need to take out front 30 data from 60 data, show 50 data to guarantee every page, according to this server B be carried out paging query.So operation, if server to be checked is more, then the user need to pay close attention to simultaneously a plurality of servers with and the result that returns, the operation more complicated, the possibility of error in operation is larger.
Summary of the invention
In view of this, the present invention proposes a kind of device of multiserver paging query, has simplified the operating process of a plurality of servers being carried out paging query so that the user can be simply, efficiently a plurality of servers are carried out paging query.
Another object of the present invention is the method that proposes a kind of multiserver paging query, has simplified the operating process of a plurality of servers being carried out paging query so that the user can be simply, efficiently a plurality of servers are carried out paging query.
For achieving the above object, the technical scheme of the embodiment of the invention is achieved in that
A kind of device of multiserver paging query, this device comprises:
Proxy module is used to each server to generate one to one server process object module, in order each server process object module is arranged in an ordered list; And according to the querying command that the user inputs, obtain data reference position and the data sum that each server satisfies querying condition from each server process object module;
Described proxy module also is used for creating a position mapping table, data reference position in the corresponding ordered list of the reference position of described position mapping table in first server process object module, the data reference position in the corresponding described ordered list of termination locations in first server process object module add the corresponding position of data sum sum of satisfying querying condition in each server process object module;
Described proxy module also is used for the corresponding relation according to paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, at corresponding server process object module the data volume that need to obtain and the starting position of fetching data are set, and notify corresponding server process object module to obtain the data that need from the server of correspondence;
Described each server process object module for the querying command that issues according to proxy module, obtains the data sum that the corresponding with service device satisfies querying condition, returns to proxy module after preservation; And be used for notice according to proxy module, according to the data volume that need to obtain from the server of correspondence and the starting position of fetching data, obtain the data that need and return to proxy module from the server of correspondence.
A kind of method of multiserver paging query may further comprise the steps:
Steps A, for each server generates one to one server process object module, and in order each server process object module is arranged in an ordered list; Described each server process object module is according to querying command, obtains data reference position and the data sum that satisfies querying condition in server corresponding to this server process object module and preserves;
Create a position mapping table, the data reference position of first server process object module in the corresponding ordered list of the reference position of described position mapping table, the data reference position of first server process object module adds the corresponding position of data sum sum of satisfying querying condition in each server process object module in the corresponding described ordered list of termination locations;
Step B, according to the corresponding relation of paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, determine the data volume that the server process object module of its mapping need to obtain from the corresponding with service device and the starting position of fetching data, and obtain data according to described starting position and data volume from the server of correspondence.
Beneficial effect of the present invention is, manage paging query to a plurality of servers by the paging query device, the user only need need not be concerned about that what servers are specifically arranged in the face of the paging query device again, just can realize the paging query to a plurality of servers, thereby simplified the operating process of a plurality of servers being carried out paging query so that the user can be simply, efficiently a plurality of servers are carried out paging query.
Description of drawings
Fig. 1 is the structure drawing of device of the embodiment of the invention;
Fig. 2 is the method flow diagram of the embodiment of the invention;
Fig. 3 is the paging query process flow diagram of the embodiment of the invention;
Fig. 4 is the mapping relations synoptic diagram of the embodiment of the invention;
Fig. 5 is the structural drawing of applying of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below by specific embodiment and referring to accompanying drawing, the present invention is described in detail.
The present invention manages paging query to a plurality of servers by the paging query device, from user's angle, only need no longer be concerned about in the face of the paging query device specifically what servers and how these servers be carried out paging query to operate.
The paging query device comprises proxy module and server process object module, each server process object module is generated by public template class, that is to say, have a template that is used for connecting with server, carrying out query manipulation, can be for different servers; For different servers, that provide according to server and the information server join dependency, comprise IP address, port, server name etc., use this template and generate different server process object modules, thereby so that each server process object module can with its server corresponding one by one on the agreement, on the attribute, and so that the server process object module carry out with it alternately by the procotol (such as TCP, IP etc.) that adapts to server.
Apparatus structure of the present invention as shown in Figure 1, a kind of device of multiserver paging query comprises: proxy module 101 and server process object module 102, wherein:
Server process object module administrative unit is used to each server to generate one to one server process object module, and in order data reference position and the data sum of each server process object module is arranged in an ordered list;
The user command receiving element is for the querying command that receives the user;
Server process object module interactive unit, be used for the user's querying command that receives is handed down to the interactive unit of each server process object module, receive the corresponding with service device that each server process object module returns and satisfy the data sum of querying condition and give the mapping processing unit; And be used for the data volume that needs obtain on corresponding server process object module that produces according to the mapping processing unit and the starting position of fetching data, notify and the interactive unit that receives in the corresponding server process object module is obtained the data that need from the server of correspondence;
The mapping processing unit, create a position mapping table, the data reference position of first server process object module in the corresponding ordered list of the reference position of described position mapping table satisfies the data sum sum of querying condition in corresponding each the server process object module of termination locations; Corresponding relation according to paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, acquisition needs the data volume of obtaining and the starting position of fetching data at corresponding server process object module, and gives server process object module interactive unit;
Described each server process object module 102 comprises
Interactive unit, be used for the querying command according to the server process object module interactive unit of proxy module, connect with corresponding server, obtain the data reference position that satisfies querying condition and data sum from the corresponding with service device, be kept in the storage unit and return to server process object module interactive unit in the proxy module; And be used for the Receiving Agent module server process object module interactive unit after the corresponding with service device needs the data volume of obtaining and the start position information that fetches data, obtain the server process object module interactive unit that the data that need return to proxy module from the server of correspondence;
Storage unit is used for the data reference position that satisfies querying condition and data sum that storage is obtained from the corresponding with service device.
Further, described proxy module 101, the user command receiving element also is used for receiving user's page turning request, server process object module interactive unit is handed down to interactive unit in each server process object module with the user's page turning request that receives, the mapping processing unit is according to the corresponding relation of paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, at corresponding server process object module the data volume that need to obtain and the starting position of fetching data are set, and give server process object module interactive unit;
Described server process object module 102, interactive unit also is used for the page turning request according to the server process object module interactive unit of proxy module, according to the data volume that need to obtain from the server of correspondence and the starting position of fetching data, obtain the data that need and return to the server process object module interactive unit of proxy module from the server of correspondence.
Method flow of the present invention as shown in Figure 2, a kind of method of multiserver paging query may further comprise the steps:
Step 201: obtain user's querying command, and the querying condition that comprises in querying command and the querying command is handed down to each the server process object module that generates in advance in the lump.
Step 202: according to querying command, each server process object module and its corresponding with service device connect, and obtain data sum and the data reference position that satisfies querying condition from the corresponding with service device.
The server process object module is corresponding one by one with server to be checked, and the data sum and the data reference position that satisfy querying condition on each server to be checked are recorded in the corresponding server process object module.
Step 203: data sum and data reference position that proxy module obtains according to above-mentioned each server process object module, in order each server process object module is arranged in an ordered list, in the described ordered list, each server process object module is as for arranged sequentially unimportant by what.
Describedly in order each server process object module is arranged in an ordered list, refers to according to predefined order the data reference position in each server process object module and data sum are arranged in ordered list.
The position mapping table of Data Position mapping is carried out in establishment to ordered list, the data reference position of first server process object module in the corresponding ordered list of the reference position of described position mapping table, satisfy the data sum sum of querying condition in corresponding each the server process object module of termination locations, thereby the total length of position mapping table is the data sum that satisfies querying condition on the Servers-all.After carrying out above-mentioned Data Position mapping, being equivalent to be dispersed in the data that meet querying condition on each server all concentrates in the mapping table of position, form an integral body, and in fact do not relate to movement, the storage of the data that meet querying condition on the server.
Set up vernier by creating the position mapping table, be equivalent to a pointer, the unlabeled data position.As shown in Figure 4, Fig. 4 shows the schematic diagram of position mapping table and server mappings.Suppose that server A, B, C are to having A, B, three server process object modules of C, the data that satisfy querying condition in the server A have 20, the data that satisfy querying condition in the server B have 10, the data that satisfy querying condition among the server C have 50, then the pointer starting position agent_beg=0 of position mapping table is mapped to the sa_beg position that server A is processed object, pointer end position agent_end=sa_end+sb_end+sc_end, be agent_end=80, for satisfying the data sum of querying condition on the Servers-all.If current slider position is agent_pos=0, then be mapped to the sa_beg position that server A is processed object.
As one of embodiment, above-mentioned server process object module can be the list mapping form, the initial position of tabulation is mapped to the data sequence number initial position that satisfies querying condition on the server, the second place of tabulation is mapped to the second data sequence number position of satisfying querying condition on the server ...., corresponding so successively, the end position of tabulation is mapped to the data sequence number most end position of satisfying querying condition on the server, and the length of tabulation is to satisfy querying condition data sum on described this server.Ordered list then couples together each tabulation, and the initial position of each server process object module is mapped to the data sequence number initial position of corresponding with service device in the ordered list, and its length is the data sum of each server process object module record.At this moment, the pointer starting position of position mapping table is corresponding to the starting position of ordered list, the pointer end position of position mapping table corresponding to: the starting position of ordered list adds the data sum that satisfies querying condition on the Servers-all.
Step 204: proxy module is according to the corresponding relation of paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, determine the data volume that the server process object module of its mapping need to obtain from the corresponding with service device and the starting position of fetching data, and obtain data according to described starting position and data volume from the server of correspondence.
For example, still take Fig. 4 as signal, proxy module is according to user's paging condition, and namely every page shows 50 data, and slider position is set, this moment, slider position was set to agent_pos=50, an i.e. page data total amount supposes that still the data total amount that A, B, three servers of C satisfy querying condition is respectively 20,10,50, then according to slider position, slider position agent_pos=50 can be mapped to the sc_beg+20 place that server C processes object, reason is as follows:
Because server A is processed in the object 20 data are only arranged, so the expectation meeting is processed all data that satisfy condition on the object with server A and is all taken, still differ from 30 data this moment, so calculate downwards according to putting in order in the server process object module ordered list, also differ from 20 data after from server B processing object, taking 10 data again, so slider position is mapped to the sc_beg+20 place that server C processes object.
Step 205: proxy module asks each server process object module to issue the positional information of Query Result to the server of correspondence simultaneously, and obtains data from the server of correspondence.
Described positional information comprises the data volume that need to obtain from the server of correspondence and the starting position of fetching data, and positional information can determine to obtain which data from the server of correspondence accordingly.
Step 206: page turning.
When user's page turning, repeating step 204 and step 205 are until data all take.The page turning if the user makes progress, then the vernier of position mapping table moves up, page turning downwards, then the vernier of position mapping table moves down.
Wherein, in the step 204, described corresponding relation according to paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, determine the step of the data volume that the server process object module of its mapping need to obtain from the corresponding with service device and the starting position of fetching data as shown in Figure 3, may further comprise the steps:
Step 301: it is the inside vernier of ordered list that variable position is set, and is set to 0 during initialization;
Step 302: the data volume of the slider position variable agent_pos=(current page-1) of setting position mapping table * every page of demonstration;
Step 303: surplus remainCount is set, and its expression residue does not obtain data volume, the data volume of every page of demonstration of surplus remainCount=;
Step 304: take out a server process object module module from ordered list, the data that satisfy querying condition on this module add up to module_end;
Step 305:position=position+module_end;
Step 306: judge whether agent_pos＜position sets up, and is, execution in step 307, no, execution in step 304;
Step 307: judge whether agent_pos+remainCount≤position sets up, and is, execution in step 308, no, execution in step 310;
Step 308: the starting position of fetching data on the module is set
Module_beg=module_end-(position-agent_pos); That is the starting position of, fetching data on server corresponding to this server paging module
Step 309: it is remainCount that the data volume that needs on the module to get is set;
Step 310: judge whether also have the server process object module in the ordered list.Be, execution in step 311, no, execution in step 315;
Step 311: the starting position of fetching data on the module is set
module_beg=module_end-(position-agent_pos)；
Step 312: the data volume that needs on the module to get is set is (position-agent_pos);
Step 313: the data volume that residue is not got is set
remainCount=remainCount-(position-agent_pos)；
Step 314: the slider position agent_pos=position of shift position mapping table, execution in step 304;
Step 315: the starting position of fetching data on the module is set
module_beg=module_end-(position-agent_pos)；
Step 316: the data volume that needs on the module to get is set is (position-agent_pos).
Described step 301～316 are for carrying out the process of a paging query.
Thinking according to the device and method of above-described multiserver paging query is derived, and can draw a kind of application extension as shown in Figure 5.Act on behalf of by paging query proxy management next stage paging query, the paging query of next stage agency is used as server to be treated, the tree type management structure that forms like this can be managed the server that the super large distributed number is disposed easily, so that the paging query that carries out on the server that the super large distributed number is disposed becomes very simple.
The present invention has simplified the operating process of a plurality of server paging inquiries, and the user can carry out the paging query of a plurality of levels simply, efficiently to a plurality of servers.Be specially adapted to the multiserver inquiry system of distributed deployment.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. the device of a multiserver paging query is characterized in that, this device comprises:
Proxy module is used to each server to generate one to one server process object module, in order each server process object module is arranged in an ordered list; And according to the querying command that the user inputs, obtain data reference position and the data sum that each server satisfies querying condition from each server process object module;
Described proxy module also is used for creating a position mapping table, data reference position in the corresponding ordered list of the reference position of described position mapping table in first server process object module, the data reference position in the corresponding described ordered list of termination locations in first server process object module add the corresponding position of data sum sum of satisfying querying condition in each server process object module;
Described proxy module also is used for the corresponding relation according to paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, at corresponding server process object module the data volume that need to obtain and the starting position of fetching data are set, and notify corresponding server process object module to obtain the data that need from the server of correspondence;
Described each server process object module for the querying command that issues according to proxy module, obtains the data sum that the corresponding with service device satisfies querying condition, returns to proxy module after preservation; And be used for notice according to proxy module, according to the data volume that need to obtain from the server of correspondence and the starting position of fetching data, obtain the data that need and return to proxy module from the server of correspondence.
2. the device of multiserver paging query as claimed in claim 1 is characterized in that,
Described proxy module, also be used for receiving user's page turning request, and according to the corresponding relation of paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, at corresponding server process object module the data volume that need to obtain and the starting position of fetching data are set, and notify corresponding server process object module to obtain the data that need from the server of correspondence;
The server process object module, also be used for after proxy module receives user's page turning request, notice according to proxy module, according to the data volume that need to obtain from the server of correspondence and the starting position of fetching data, obtain the data that need and return to proxy module from the server of correspondence.
3. the device of multiserver paging query as claimed in claim 1 or 2 is characterized in that, described proxy module comprises
Server process object module administrative unit is used to each server to generate one to one server process object module, and in order data reference position and the data sum of each server process object module is arranged in an ordered list;
The user command receiving element is for the querying command that receives the user;
Server process object module interactive unit, be used for the user's querying command that receives is handed down to the interactive unit of each server process object module, receive the corresponding with service device that each server process object module returns and satisfy the data sum of querying condition and give the mapping processing unit; And be used for the data volume that needs obtain on corresponding server process object module that produces according to the mapping processing unit and the starting position of fetching data, notify the interactive unit in the corresponding server process object module to obtain the data that need and receive the described data of obtaining from the server of correspondence;
The mapping processing unit, create a position mapping table, the data reference position of first server process object module in the corresponding ordered list of the reference position of described position mapping table satisfies the data sum sum of querying condition in corresponding each the server process object module of termination locations; Corresponding relation according to paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, acquisition needs the data volume of obtaining and the starting position of fetching data at corresponding server process object module, and gives server process object module interactive unit;
Described each server process object module comprises
Interactive unit, be used for the querying command according to the server process object module interactive unit of proxy module, connect with corresponding server, obtain the data reference position that satisfies querying condition and data sum from the corresponding with service device, be kept in the storage unit and return to server process object module interactive unit in the proxy module; And be used for the Receiving Agent module server process object module interactive unit after the corresponding with service device needs the data volume of obtaining and the start position information that fetches data, obtain the server process object module interactive unit that the data that need return to proxy module from the server of correspondence;
Storage unit is used for the data reference position that satisfies querying condition and data sum that storage is obtained from the corresponding with service device.
4. the device of multiserver paging query as claimed in claim 3, it is characterized in that, arbitrary server process object module in described each server process object module is by the template that is used for connecting with server, carrying out query manipulation, and the information with this server join dependency that provides according to the corresponding with service device generates.
5. the method for a multiserver paging query is characterized in that, may further comprise the steps:
Steps A, for each server generates one to one server process object module, and in order each server process object module is arranged in an ordered list; Described each server process object module is according to querying command, obtains data reference position and the data sum that satisfies querying condition in server corresponding to this server process object module and preserves;
Create a position mapping table, the data reference position of first server process object module in the corresponding ordered list of the reference position of described position mapping table, the data reference position of first server process object module adds the corresponding position of data sum sum of satisfying querying condition in each server process object module in the corresponding described ordered list of termination locations;
Step B, according to the corresponding relation of paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, determine the data volume that the server process object module of its mapping need to obtain from the corresponding with service device and the starting position of fetching data, and obtain data according to described starting position and data volume from the server of correspondence.
6. method according to claim 5 is characterized in that, described server from correspondence obtains after the data that satisfy querying condition, further comprise carrying out the page turning query manipulation, and during page turning, repeated execution of steps B.
7. method according to claim 5, it is characterized in that, described corresponding relation according to paging condition and position mapping table and ordered list, the slider position of setting position mapping table, slider position by the position mapping table, determine the data volume that the server process object module of its mapping need to obtain from the corresponding with service device and the starting position of fetching data, comprising:
Step 1, the data volume that every page of demonstration in the paging condition is set and current number of pages, the slider position of setting position mapping table;
Step 2, the current server process object module of selection, and carry out following operation:
If the data sum in this server process object module, determines then that the data volume that needs to get on this server is the data volume of every page of demonstration more than or equal to the data volume of every page of demonstration; The position that the slider position of position mapping table is mapped to ordered list is adjusted into: corresponding data reference position adds the data volume of every page of demonstration in this server process object module;
If the data sum in this server process object module is less than the data volume of every page of demonstration, need on this server then to determine the data volume of getting total for the data that this server satisfies querying condition; The position that the slider position of position mapping table is mapped to ordered list is adjusted into: the data reference position adds data sum in this server process object module in this server process object module; Judge whether also have next server process object module in the ordered list, if having, then according to the next server process object module of the select progressively of server process object module in the ordered list, return step 2, otherwise, finish.
8. method according to claim 7 is characterized in that, described step 2 specifically comprises:
S1, the inside vernier variable that ordered list is set, slider position variable and the surplus of position mapping table; And carry out initialization;
S2, take out in order a server process object module from ordered list, the inside vernier variable of the current ordered list of assignment is: the data sum in the inside vernier variable of last ordered list+this server process object module;
S3, judge the current location mapping table the slider position variable whether less than the inside vernier variable of current ordered list, if so, execution in step S4 then, otherwise, execution in step S2;
S4, the slider position of judging the current location mapping table add the current residual amount whether less than or equal to the inside vernier variable of current ordered list,
If so, then
The starting position of fetching data on server corresponding to described server process object module is set is: data sum-(the slider position variable of the inside vernier variable of current ordered list-current location mapping table) in the described server process object module,
It is the current residual amount that the data volume that needs on the described server to get is set,
Otherwise, execution in step S5;
S5, judge in the ordered list whether to also have the server process object module,
If so, then
The starting position of fetching data on the described server is set is: data sum-(the slider position variable of the inside vernier variable of current ordered list-current location mapping table) in the described server process object module,
The data volume that needs on the described server to get is set is: the slider position variable of the inside vernier variable of current ordered list-current location mapping table,
The current residual amount is set is: last surplus-(the slider position variable of the inside vernier variable of current ordered list-current location mapping table),
The slider position variable that the current location mapping table is set equals the inside vernier variable of current ordered list, execution in step S2;
Otherwise, the starting position of fetching data on the described server is set is: data sum-(the slider position variable of the inside vernier variable of current ordered list-current location mapping table) in the described server process object module,
The data volume that needs on the described server to get is set is: the slider position variable of the inside vernier variable of current ordered list-current location mapping table.
9. method according to claim 8, it is characterized in that, the described initialization of step S1 comprises, the inside vernier variable initial value that ordered list is set is 0, the slider position variable of position mapping table is: the data volume of (current page-1) * every page of demonstration, surplus equals the data volume of every page of demonstration.
10. each described method according to claim 5-9, it is characterized in that, describedly in order each server process object module is arranged in an ordered list, refers to according to predefined order the data reference position in each server process object module and data sum are arranged in ordered list.
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| JP2001344175A (en) * | 2000-05-31 | 2001-12-14 | Net Village Co Ltd | Method of transmitting text data at portable terminal |
| WO2002010988A2 (en) * | 2000-07-31 | 2002-02-07 | Starkey James A | Method and apparatus for generating web pages from templates |
| KR100556331B1 (en) * | 2001-11-13 | 2006-03-03 | 인터내셔널 비지네스 머신즈 코포레이션 | System and method for selecting electronic documents from a physical document and for displaying the electronic documents over said physical document |
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