CN104883389B - A kind of acquisition methods and equipment servicing end position - Google Patents
A kind of acquisition methods and equipment servicing end position Download PDFInfo
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- CN104883389B CN104883389B CN201510185194.1A CN201510185194A CN104883389B CN 104883389 B CN104883389 B CN 104883389B CN 201510185194 A CN201510185194 A CN 201510185194A CN 104883389 B CN104883389 B CN 104883389B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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Abstract
The invention discloses a kind of acquisition methods and equipment for servicing end position, this method comprises: node device is when providing first service, the corresponding relationship between first service information and first service end position is being recorded in location database, and position is sent with broadcast mode and stores request message, the corresponding relationship between the first service information and the first service end position is carried in the position storage request message；The node device is when needing using second service, utilize second service information inquiring position database, if record has the corresponding second service end position of the second service information in the location database, then the node device obtains the second service end position from the location database, and establishes connection with corresponding server-side using the second service end position.In the embodiment of the present invention, the processing workload of dns server is alleviated, improves the domain name resolution efficiency and domain name mapping speed of whole system.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of acquisition methods and equipment for servicing end position.
Background technique
In a distributed system, under the premise of servicing end position without offer on the client, client can be quasi-
True acquisition services end position, and establishes connection based on service end position and server-side, thus the service provided using server-side.
In order to accurately obtain service end position, client sends domain name to DNS (Domain Name System, domain name system) server
Analysis request, the domain name mapping request in carry information on services.Information on services and server-side position based on this dns server record
Corresponding relationship between setting, dns server is after receiving domain name mapping request, the corresponding server-side position of query service information
It sets, and service end position is sent to by client by domain name mapping response, service end position is obtained by client.
Since all clients are required to obtain service end position on dns server, it is serviced when needing to obtain
When the client terminal quantity of end position is more, dns server will receive a large amount of domain name mapping request, and returns to a large amount of carry and take
The domain name mapping response of business end position, increases the processing workload of dns server, the domain name resolution efficiency of whole system is very
Lowly.Moreover, client may take a long time obtain when obtaining service end position in client to dns server
To service end position.
Summary of the invention
The embodiment of the present invention provides a kind of acquisition methods for servicing end position, applied to the distribution including multiple node devices
In formula system, each equal maintenance position database of node device, the location database is for recording information on services and server-side position
Corresponding relationship between setting, which comprises
Node device records the first service when providing first service in the location database of this node device
Corresponding relationship between first service information and the first service end position of the first service, and position is sent with broadcast mode
Request message is stored, carries the first service information and the first service end position in the position storage request message
Between corresponding relationship；By receiving other node devices of the position storage request message in the position of other node devices
Set the corresponding relationship recorded between the first service information and the first service end position in database；
The node device inquires this when needing using second service, using the second service information of the second service
The location database of node device, if record has the corresponding second service of the second service information in the location database
End position, then the node device obtains the second service end position from the location database, and utilizes described second
It services end position and establishes connection with corresponding server-side.
The method further includes: the node devices to be taken with what broadcast mode was sent receiving other node devices
When position with the corresponding relationship between second service information and second service end position stores request message, then the node is set
It is standby that pair between the second service information and the second service end position is being recorded in the location database of this node device
It should be related to.
The method further includes: when the node device is not when providing first service, the node device is from originally
The corresponding relationship between the first service information and the first service end position is deleted in the location database of node device,
And position deletion request message is sent with broadcast mode, the first service information is carried in the position deletion request message
With the corresponding relationship between the first service end position；By receive other node devices of the position deletion request message from
It is deleted in the location database of other node devices between the first service information and the first service end position
Corresponding relationship.
The method further includes:
When the first service provided is updated to third service by the node device, the node device sets this node
The corresponding relationship between the first service information and the first service end position in standby location database, is updated to institute
The corresponding relationship between the third information on services of third service and the third service end position of the third service is stated, and with broadcast
Mode sends location update request message, and the first service information before updating is carried in the location update request message
Corresponding relationship and the updated third information on services and the third service between the first service end position
Corresponding relationship between end position；Other node devices by receiving the location update request message set other nodes
The corresponding relationship between the first service information and the first service end position in standby location database, is updated to institute
State the corresponding relationship between third information on services and third service end position.
The method further includes:
When there is new node equipment to be added to the distributed system, the node device is with mode of unicast to the new section
Point device sends position informing request message, and all clothes of this node device offer are carried in the position informing request message
Corresponding relationship between the information on services of business and the service end position of all services, by the new node equipment described new
It is recorded in the location database of node device between the information on services of all services and the service end position of all services
Corresponding relationship.
The method further includes:
When the node device leaves from the distributed system, the node device with broadcast mode send position from
Open request message, the position is left and carries the information that the node device leaves in request message, by receive the position from
It is described for opening the service end position that other node devices of request message traverse in the location database of other node devices
The corresponding relationship of node device, and deleting service end position from the location database of other node devices is the node
The corresponding relationship of equipment.
The node device inquires the location database of this node device using the second service information of the second service
Later, the method also includes:
If not recording the corresponding second service end position of the second service information, institute in the location database
It states node device and position enquiring request message is sent with broadcast mode, second clothes are carried in the position enquiring request message
Business information, other node devices as receiving the position enquiring request message are being determined as described in this other node devices offer
When the corresponding second service of second service information, the second service for carrying other node devices is returned to the node device
The position enquiring response message of end position；The node device obtains the second service from the position enquiring response message
End position, and connection is established with corresponding server-side using the second service end position.
The embodiment of the present invention provides a kind of node device, applied to include multiple node devices distributed system in, respectively
The equal maintenance position database of node device, the location database are used to record corresponding between information on services and service end position
Relationship, the node device specifically include:
Logging modle, for recording the first clothes in the location database of the node device when providing first service
Corresponding relationship between the first service information of business and the first service end position of first service；
Sending module stores request message for sending position with broadcast mode, takes in the position storage request message
With the corresponding relationship between the first service information and the first service end position；By receiving the position storage request
Other node devices of message recorded in the location database of other node devices the first service information with it is described
Corresponding relationship between first service end position；
Enquiry module, for when needing using second service, determining the second service information of the second service, and benefit
The location database of the node device is inquired with the second service information of the second service；
Processing module has the corresponding second service end of the second service information for working as record in the location database
When position, then the corresponding second service end position of the second service information is obtained from the location database, and utilize institute
It states second service end position and establishes connection with corresponding server-side.
The logging modle is also used in the carrying second service letter for receiving other node devices and being sent with broadcast mode
When the position of corresponding relationship between breath and second service end position stores request message, then in the positional number of the node device
According to the corresponding relationship recorded in library between the second service information and the second service end position.
The logging modle is also used to be deleted from location database when the node device is not when providing first service
Except the corresponding relationship between the first service information and the first service end position；
The sending module is also used to send position deletion request message with broadcast mode, and the position removal request disappears
The corresponding relationship between the first service information and the first service end position is carried in breath；It is deleted by receiving the position
Except other node devices of request message delete the first service information from the location database of other node devices
With the corresponding relationship between the first service end position.
The logging modle is also used to when the first service provided is updated to third service by the node device, will
Corresponding pass between the first service information and the first service end position in the location database of the node device
System is updated to the corresponding pass between the third information on services of the third service and the third of third service service end position
System；
The sending module is also used to send location update request message with broadcast mode, and the position updating request disappears
The first service information before updating and the corresponding relationship between the first service end position are carried in breath, and are updated
The corresponding relationship between the third information on services and third service end position afterwards；By receiving the position updating request
Other node devices of message are by the first service information and described the in the location database of other node devices
Corresponding relationship between one service end position, pair being updated between the third information on services and third service end position
It should be related to.
The sending module is also used to when there is new node equipment to be added to the distributed system, with mode of unicast to
The new node equipment sends position informing request message, carries the node device in the position informing request message and mentions
Corresponding relationship between the information on services of all services supplied and the service end position of all services, is set by the new node
It is standby that the information on services of all services and the server-side of all services are recorded in the location database of the new node equipment
Corresponding relationship between position.
The sending module is also used to send out when the node device leaves from the distributed system with broadcast mode
Position is sent to leave request message, the position is left and carries the information that the node device leaves in request message, by receiving
Rheme, which is set, to be left other node devices of request message and traverses server-side position in the location database of other node devices
It is set to the corresponding relationship of the node device, and deletes service end position from the location database of other node devices and is
The corresponding relationship of the node device.
The sending module is also used to inquire institute using the second service information of the second service in the enquiry module
After the location database for stating node device, if not recording the second service information corresponding in the location database
Two service end positions then send position enquiring request message with broadcast mode, in the position enquiring request message described in carrying
Second service information, other node devices by receiving the position enquiring request message are mentioned determining by this other node device
When second service corresponding for the second service information, the position for carrying the second service end position of other node devices is returned to
Query response message；
The processing module is also used to obtain the second service end position from the position enquiring response message, and
Connection is established with corresponding server-side using the second service end position.
Based on the above-mentioned technical proposal, it in the embodiment of the present invention, is taken by being recorded in the location database of each node device
Corresponding relationship between information of being engaged in and service end position can directly be set from this node when node device is needed using service
It is obtained in standby location database and services corresponding service end position, avoid obtaining service on each node device to dns server
End position alleviates the processing workload of dns server, improves the domain name resolution efficiency and domain name mapping speed of whole system
Degree, it is ensured that business rapid operation.
Detailed description of the invention
Fig. 1 is a kind of acquisition methods flow diagram for servicing end position provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of node device provided in an embodiment of the present invention.
Specific embodiment
Aiming at the problems existing in the prior art, the embodiment of the present invention provides a kind of acquisition methods for servicing end position, should
Method is applied in the distributed system including multiple node devices, and each node device can be client or server-side.Its
In, for node device when providing some service, then the node device is the server-side of the service.Node device is needing to use certain
When a service, then the node device is the client of the service.Further, if installing some service on node device
When service terminal software, then the node device can be used as the server-side of the service.If installing some service on node device
Client software when, then the node device can be used as the client of the service.
In the embodiment of the present invention, maintenance has location database, and the position on all node devices of distributed system
Database is set for recording the corresponding relationship between the information on services of the distributed system and service end position.Wherein, the service
Corresponding relationship between information and service end position can be stored in distributed system in the form of a record of database
In the location database of all node devices.
As shown in Figure 1, the acquisition methods of the service end position can specifically include following steps:
Step 101, node device records the first clothes when providing first service in the location database of this node device
Corresponding relationship between the first service information of business and the first service end position of first service.
Step 102, node device sends position with broadcast mode and stores request message, takes in position storage request message
With the corresponding relationship between first service information and first service end position；By the other sections for receiving position storage request message
Point device is recording pair between first service information and first service end position in the location database of this other node device
It should be related to.
In the embodiment of the present invention, node device takes in the carrying second for receiving other node devices and being sent with broadcast mode
When the position of corresponding relationship between information of being engaged in and second service end position stores request message, then node device is set in this node
The corresponding relationship between second service information and second service end position is recorded in standby location database.
For example, including node device A, node device B and node device C in distributed system.Node device A is being provided
When HTTP (Hyper Text Transfer Protocol, hypertext transfer protocol) is serviced, in the position data of node device A
The information on services (port information of such as HTTP service) of HTTP service and service end position (such as node of HTTP service are recorded in library
The IP address of equipment A) between corresponding relationship.Node device A is by the IP address of the port information of HTTP service and node device A
Between corresponding relationship broadcast transmission to node device B and node device C.Node device B (or node device C) is in node device
Pair between the port information of HTTP service and the IP address of node device A is recorded in the location database of B (or node device C)
It should be related to.In another example node device A receive node device B broadcast transmission FTP (File Transfer Protocol,
File Transfer Protocol) service port information and node device B IP address between corresponding relationship when, then in this node device
The corresponding relationship between the port information of FTP service and the IP address of node device B is recorded in the location database of A.
Step 103, node device is inquired when needing using second service using the second service information of the second service
The location database of this node device.Wherein, if record has the second service information corresponding second in the location database
End position is serviced, thens follow the steps 104；If not recording corresponding second clothes of the second service information in the location database
Business end position, thens follow the steps 105.
Step 104, node device obtains the corresponding second service end position of second service information from location database, and
Connection is established with corresponding server-side using the second service end position.
Step 105, node device sends the position enquiring request message for carrying second service information with broadcast mode.It receives
Other node devices of the position enquiring request message are determining corresponding by this other node devices offer second service information
When second service, then the position enquiring response that the second service end position of the other node devices of carrying is returned to node device disappears
Breath.Node device obtains second service end position from the position enquiring response message, and using the second service end position with
Corresponding server-side establishes connection.
For example, node device A when needing using FTP service, utilizes the information on services (end of such as FTP service of FTP service
Message breath) query node equipment A location database.Due to having recorded the end of FTP service in the location database of node device A
Corresponding relationship between message breath and the IP address of node device B, therefore, node device A obtain FTP clothes from location database
The IP address of the corresponding node device B of the port information of business, and established and connected using the IP address of node device B and node device B
It connects.
In another example node device A is serviced when needing to be serviced using P2P (Peer-to-Peer, point-to-point) using P2P
Information on services the port information of service (such as P2P) query node equipment A location database.Due to the position of node device A
Do not have in database record P2P service port information and service end position between corresponding relationship, therefore, node device A to
The position enquiring request that the node device B and node device C broadcast transmission of distributed system carry the port information of P2P service disappears
Breath.Node device C is after receiving the position enquiring request message, if it is determined that provides the end of service P2P by this node device C
Message ceases corresponding P2P service, then node device C returns to the position enquiring for carrying the IP address of node device C to node device A
Response message.Node device A obtains node from the position enquiring response message after receiving the position enquiring response message
The IP address of equipment C, and connection is established using the IP address of node device C and node device C.Further, node device B exists
After receiving the position enquiring request message, if it is determined that the port information that this node device B does not provide P2P service is corresponding
P2P service, then: node device B can not return to any position enquiring response message to node device A；Alternatively, node device B
The position enquiring that this node device B does not provide the corresponding P2P service of port information of P2P service can be returned to node device A
Response message.
In the embodiment of the present invention, when node device initially provides first service, but the node device is subsequent is not providing the
When one service, then node device deletes first service information and first service end position from the location database of this node device
Between corresponding relationship, and position deletion request message is sent with broadcast mode, the is carried in the position deletion request message
Corresponding relationship between one information on services and first service end position.Further, by receive position deletion request message its
Its node device is deleted between first service information and first service end position from the location database of this other node device
Corresponding relationship.
In the embodiment of the present invention, when the first service that node device provides this node device is updated to third service,
Then the node device can will be between the first service information in the location database of this node device and first service end position
Corresponding relationship is updated to the corresponding pass between the third information on services of third service and the third of third service service end position
System, and location update request message is sent with broadcast mode, wherein the before updating is carried in the location update request message
Corresponding relationship and updated third information on services and third server-side between one information on services and first service end position
Corresponding relationship between position.Further, by receiving other node devices of the location update request message for this other section
Corresponding relationship between first service information in the location database of point device and first service end position is updated to third clothes
Corresponding relationship between information of being engaged in and third service end position.
In the embodiment of the present invention, when there is new node equipment to be added to distributed system, node device with mode of unicast to
The new node equipment sends position informing request message, and the institute of this node device offer is carried in the position informing request message
There is the corresponding relationship between the information on services of service and the service end position of all services.Further, so that new node equipment
Between the service end position of information on services and all services for recording all services in the location database of the new node equipment
Corresponding relationship.
For example, when there is node device D to be added to distributed system, since node device A provides HTTP service,
Corresponding relationship between the port information of HTTP service and the IP address of node device A is sent to node device by node device A
D, node device D are corresponding between the port information and the IP address of node device A for recording HTTP service in location database
Relationship.Moreover, because node device B provides FTP service, therefore, node device B sets the port information of FTP service with node
Corresponding relationship between the IP address of standby B is sent to node device D, and node device D records FTP service in location database
Corresponding relationship between port information and the IP address of node device B.
In the embodiment of the present invention, when node device leaves from distributed system, which is sent with broadcast mode
Request message is left in position, and the position is left and carries the information that this node device leaves in request message.Further, it receives
Other node devices that request message is left in the position traverse the service end position in the location database of this other node device
For the corresponding relationship of the node device, and deleting service end position from the location database of this other node device is the node
The corresponding relationship of equipment.
For example, when node device A leaves from distributed system, node device B from node device A to distributed system and
Leave request message in the position that node device C broadcast transmission carries the information that this node device A leaves.Node device B is being received
After leaving request message to the position, traversing the service end position in the location database of this node device B is node device A
Corresponding relationship, i.e., service end position be node device A IP address corresponding relationship.Due to being had recorded in location database
Corresponding relationship between the port information of HTTP service and the IP address of node device A, therefore, node device B is from position data
The corresponding relationship between the port information of HTTP service and the IP address of node device A is deleted in library.Similarly, node device C exists
It receives after the position leaves request message, the port information and node device A of HTTP service is deleted from location database
IP address between corresponding relationship.
Node device B is between the IP address of port information and node device A for deleting HTTP service in location database
Corresponding relationship after, if node device B has found that this node device B also provides HTTP service, node device B is in positional number
According to the corresponding relationship between the IP address of the port information and node device B that record HTTP service in library, and by HTTP service
The node device C of corresponding relationship broadcast transmission between port information and the IP address of node device B to distributed system.Node
After equipment C receives the corresponding relationship between the port information of HTTP service and the IP address of node device B, in location database
Record the corresponding relationship between the port information of HTTP service and the IP address of node device B.
Based on the above-mentioned technical proposal, it in the embodiment of the present invention, is taken by being recorded in the location database of each node device
Corresponding relationship between information of being engaged in and service end position can directly be set from this node when node device is needed using service
It is obtained in standby location database and services corresponding service end position, avoid obtaining service on each node device to dns server
End position alleviates the processing workload of dns server, improves the domain name resolution efficiency and domain name mapping speed of whole system
Degree, it is ensured that business rapid operation.
Based on inventive concept same as the above method, a kind of node device is additionally provided in the embodiment of the present invention, is applied
In the distributed system for including multiple node devices, each equal maintenance position database of node device, the location database is used
In record information on services and the corresponding relationship between end position is serviced, as shown in Fig. 2, the node device specifically includes:
Logging modle 11, for recording first in the location database of the node device when providing first service
Corresponding relationship between the first service information of service and the first service end position of first service；Sending module 12, for
Broadcast mode sends position and stores request message, carries the first service information and institute in the position storage request message
State the corresponding relationship between first service end position；By receiving other node devices of the position storage request message described
It is recorded in the location database of other node devices corresponding between the first service information and the first service end position
Relationship；Enquiry module 13, for when needing using second service, determining the second service information of the second service, and benefit
The location database of the node device is inquired with the second service information of the second service；Processing module 14, for working as institute
When stating in location database record has the second service information corresponding second service end position, then from the location database
It is middle to obtain the corresponding second service end position of the second service information, and utilize the second service end position and corresponding clothes
Connection is established at business end.
The logging modle 11 is also used in the carrying second service for receiving other node devices and being sent with broadcast mode
When the position of corresponding relationship between information and second service end position stores request message, then in the position of the node device
The corresponding relationship between the second service information and the second service end position is recorded in database.
The logging modle 11 is also used to when the node device is not when providing first service, from location database
Delete the corresponding relationship between the first service information and the first service end position；The sending module 12, is also used to
Send position deletion request message with broadcast mode, carry in the position deletion request message first service information with
Corresponding relationship between the first service end position；By receiving other node devices of the position deletion request message from institute
State pair deleted between the first service information and the first service end position in the location database of other node devices
It should be related to.
The logging modle 11 is also used to when the first service provided is updated to third service by the node device,
By the first service information in the location database of the node device and corresponding between the first service end position
Relationship is updated to corresponding between the third information on services of the third service and the third of third service service end position
Relationship；
The sending module 12 is also used to send location update request message, the position updating request with broadcast mode
The first service information before updating and the corresponding relationship between the first service end position, Yi Jigeng are carried in message
Corresponding relationship between the third information on services after new and third service end position；It is asked by receiving the location updating
Ask other node devices of message by the location database of other node devices the first service information with it is described
Corresponding relationship between first service end position is updated between the third information on services and third service end position
Corresponding relationship.
The sending module 12, is also used to when there is new node equipment to be added to the distributed system, with mode of unicast
Position informing request message is sent to the new node equipment, carries the node device in the position informing request message
Corresponding relationship between the information on services of all services provided and the service end position of all services, by the new node
Equipment records the information on services of all services and the service of all services in the location database of the new node equipment
Corresponding relationship between end position.
The sending module 12 is also used to when the node device leaves from the distributed system, with broadcast mode
It sends position and leaves request message, the position is left and carries the information that the node device leaves in request message, and institute is received
Rheme, which is set, to be left other node devices of request message and traverses server-side position in the location database of other node devices
It is set to the corresponding relationship of the node device, and deletes service end position from the location database of other node devices and is
The corresponding relationship of the node device.
The sending module 12 is also used to inquire in the enquiry module using the second service information of the second service
After the location database of the node device, if it is corresponding not record the second service information in the location database
Second service end position then sends position enquiring request message with broadcast mode, carries institute in the position enquiring request message
Second service information is stated, other node devices by receiving the position enquiring request message are being determined by this other node device
When the corresponding second service of the second service information is provided, the position for carrying the second service end position of other node devices is returned to
Set query response message；The processing module 14 is also used to obtain the second service from the position enquiring response message
End position, and connection is established with corresponding server-side using the second service end position.
Wherein, the modules of apparatus of the present invention can integrate in one, can also be deployed separately.Above-mentioned module can close
And be a module, multiple submodule can also be further split into.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be by
Software adds the mode of required general hardware platform to realize, naturally it is also possible to which by hardware, but in many cases, the former is more
Good embodiment.Based on this understanding, technical solution of the present invention substantially in other words contributes to the prior art
Part can be embodied in the form of software products, which is stored in a storage medium, if including
Dry instruction is used so that a computer equipment (can be personal computer, server or the network equipment etc.) executes this hair
Method described in bright each embodiment.It will be appreciated by those skilled in the art that attached drawing is the schematic diagram of a preferred embodiment,
Module or process in attached drawing are not necessarily implemented necessary to the present invention.It will be appreciated by those skilled in the art that in embodiment
Device in module can according to embodiment describe be distributed in the device of embodiment, corresponding change position can also be carried out
In the one or more devices for being different from the present embodiment.The module of above-described embodiment can be merged into a module, can also be with
It is further split into multiple submodule.The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.With
Upper disclosed several specific embodiments only of the invention, still, the present invention is not limited to this, any those skilled in the art
Member can think of variation should all fall into protection scope of the present invention.
Claims (14)
1. a kind of acquisition methods for servicing end position, applied in the distributed system including multiple node devices, feature exists
In each equal maintenance position database of node device, the location database is for recording between information on services and service end position
Corresponding relationship, which comprises
Node device records the first of the first service when providing first service in the location database of this node device
Corresponding relationship between information on services and the first service end position of the first service, and position storage is sent with broadcast mode
Request message, the position stores to be carried between the first service information and the first service end position in request message
Corresponding relationship；By positional number of other node devices in other node devices for receiving the position storage request message
According to the corresponding relationship recorded in library between the first service information and the first service end position；
The node device inquires this node when needing using second service, using the second service information of the second service
The location database of equipment, if record has the corresponding second service end position of the second service information in the location database
It sets, then the node device obtains the second service end position from the location database, and utilizes the second service
End position establishes connection with corresponding server-side.
2. the method as described in claim 1, which is characterized in that the method further includes:
The node device is in the carrying second service information and the second clothes for receiving other node devices and being sent with broadcast mode
The position of the corresponding relationship between end position be engaged in when storing request message, then positional number of the node device in this node device
According to the corresponding relationship recorded in library between the second service information and the second service end position.
3. the method as described in claim 1, which is characterized in that the method further includes:
When the node device no longer provides first service, the node device is from the location database of this node device
The corresponding relationship between the first service information and the first service end position is deleted, and position is sent with broadcast mode and is deleted
Except request message, carried in the position deletion request message first service information and the first service end position it
Between corresponding relationship；By receiving other node devices of the position deletion request message from the position of other node devices
The corresponding relationship between the first service information and the first service end position is deleted in database.
4. the method as described in claim 1, which is characterized in that the method further includes:
When the first service provided is updated to third service by the node device, the node device is by this node device
The corresponding relationship between the first service information and the first service end position in location database is updated to described
Corresponding relationship between the third information on services of three services and the third service end position of the third service, and with broadcast mode
Location update request message is sent, the first service information before updating and institute are carried in the location update request message
State corresponding relationship between first service end position and the updated third information on services and third server-side position
Corresponding relationship between setting；By receiving other node devices of the location update request message for other node devices
The corresponding relationship between the first service information and the first service end position in location database is updated to described
Corresponding relationship between three information on services and third service end position.
5. the method as described in claim 1, which is characterized in that the method further includes:
When there is new node equipment to be added to the distributed system, the node device is set with mode of unicast to the new node
Preparation send position informing request message, and all services of this node device offer are carried in the position informing request message
Corresponding relationship between information on services and the service end position of all services, by the new node equipment in the new node
It is recorded in the location database of equipment corresponding between the information on services of all services and the service end position of all services
Relationship.
6. the method as described in claim 1, which is characterized in that the method further includes:
When the node device leaves from the distributed system, the node device is left with broadcast mode transmission position and is asked
Message is sought, the position is left and carries the information that the node device leaves in request message, is left by receiving the position and is asked
Asking other node devices of message to traverse the service end position in the location database of other node devices is the node
The corresponding relationship of equipment, and deleting service end position from the location database of other node devices is the node device
Corresponding relationship.
7. the method as described in claim 1, which is characterized in that the node device utilizes the second service of the second service
Information is inquired after the location database of this node device, the method also includes:
If not recording the corresponding second service end position of the second service information, the section in the location database
Point device sends position enquiring request message with broadcast mode, and the second service letter is carried in the position enquiring request message
Breath, other node devices by receiving the position enquiring request message are being determined by this other node devices offer described second
When the corresponding second service of information on services, the second service end position for carrying other node devices is returned to the node device
The position enquiring response message set；The node device obtains the second service end position from the position enquiring response message
It sets, and establishes connection with corresponding server-side using the second service end position.
8. a kind of node device, applied in the distributed system including multiple node devices, which is characterized in that each node device
Equal maintenance position database, the location database are used to record information on services and service the corresponding relationship between end position, institute
Node device is stated to specifically include:
Logging modle, for recording first service in the location database of the node device when providing first service
Corresponding relationship between first service information and the first service end position of first service；
Sending module stores request message for sending position with broadcast mode, carries in the position storage request message
Corresponding relationship between the first service information and the first service end position；By receiving the position storage request message
Other node devices the first service information and described first is recorded in the location database of other node devices
Service the corresponding relationship between end position；
Enquiry module for when needing using second service, determining the second service information of the second service, and utilizes institute
The second service information for stating second service inquires the location database of the node device；
Processing module has the corresponding second service end position of the second service information for working as record in the location database
When, then obtain the corresponding second service end position of the second service information from the location database, and utilize described the
Two service end positions establish connection with corresponding server-side.
9. equipment as claimed in claim 8, which is characterized in that
The logging modle, be also used to the carrying second service information for receiving other node devices and being sent with broadcast mode with
When the position of corresponding relationship between second service end position stores request message, then in the location database of the node device
The middle corresponding relationship recorded between the second service information and the second service end position.
10. equipment as claimed in claim 8, which is characterized in that
The logging modle is also used to delete institute from location database when the node device no longer provides first service
State the corresponding relationship between first service information and the first service end position；
The sending module is also used to send position deletion request message with broadcast mode, in the position deletion request message
Carry the corresponding relationship between the first service information and the first service end position；It is asked by receiving the position deletion
Other node devices of message are asked to delete the first service information and institute from the location database of other node devices
State the corresponding relationship between first service end position.
11. equipment as claimed in claim 8, which is characterized in that
The logging modle is also used to when the first service provided is updated to third service by the node device, will be described
The corresponding relationship between the first service information and the first service end position in the location database of node device, more
The corresponding relationship between end position is newly serviced for the third information on services of the third service and the third of the third service；
The sending module is also used to send location update request message with broadcast mode, in the location update request message
Carry the first service information before updating and the corresponding relationship and updated between the first service end position
Corresponding relationship between the third information on services and third service end position；By receiving the location update request message
Other node devices by the location database of other node devices the first service information and it is described first clothes
Corresponding relationship between business end position is updated to the corresponding pass between the third information on services and third service end position
System.
12. equipment as claimed in claim 8, which is characterized in that
The sending module is also used to when there is new node equipment to be added to the distributed system, with mode of unicast to described
New node equipment sends position informing request message, carries what the node device provided in the position informing request message
Corresponding relationship between the information on services of all services and the service end position of all services, is existed by the new node equipment
The information on services of all services and the service end position of all services are recorded in the location database of the new node equipment
Between corresponding relationship.
13. equipment as claimed in claim 8, which is characterized in that
The sending module is also used to when the node device leaves from the distributed system, sends position with broadcast mode
It sets and leaves request message, the position is left and carries the information that the node device leaves in request message, the rheme by receiving
It sets and leaves the service end position that other node devices of request message traverse in the location database of other node devices and be
The corresponding relationship of the node device, and it is described for deleting service end position from the location database of other node devices
The corresponding relationship of node device.
14. equipment as claimed in claim 8, which is characterized in that
The sending module is also used to inquire the section using the second service information of the second service in the enquiry module
After the location database of point device, if not recording corresponding second clothes of the second service information in the location database
Business end position then sends position enquiring request message with broadcast mode, carries described second in the position enquiring request message
Information on services, other node devices by receiving the position enquiring request message are being determined by this other node devices offers institute
When stating the corresponding second service of second service information, the position enquiring for carrying the second service end position of other node devices is returned
Response message；
The processing module is also used to obtain the second service end position from the position enquiring response message, and utilizes
The second service end position establishes connection with corresponding server-side.
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