CN103209223A - Distributed application conversation information sharing method and system and application server - Google Patents
Distributed application conversation information sharing method and system and application server Download PDFInfo
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Abstract
The invention discloses a distributed application conversation information sharing method and system and an application server and relates to the technical field of distributed applications. The distributed application conversation information sharing method includes that the application server receives a first request sent by a load balancer, stores conversation information constructed by applications in a conversation database/server and copies the conversation information into local conversation; for follow-up requests, the application server reads updating signs of the conversation information from the conversation database/server according to conversation signs; and if the updating signs indicate that conversation information updating is not needed, the applications on the application server process the follow-up requests according to the conversation information of local conversation. According to the distributed application conversation information sharing method and system and the application server, a conversation local storage mode and a conversation remote storage mode are mixedly used, conversation information distributed sharing expanse is greatly reduced by reducing remote reading times of the conversation information, and system performance is effectively improved.
Description
Technical field
The present invention relates to the Distributed Application technical field, particularly a kind of Distributed Application session information is shared method, system and application server.
Background technology
Typical Web application system is used multi-level architecture design usually, comprises presentation layer, operation layer and data Layer.Usually, presentation layer and operation layer are layering logic layers, during actual deployment all on same physical node.
Many enterprise-level applications have very high requirement for the autgmentability of system, need presentation layer and operation layer not only logical separation also want physical separation, thereby realize real hierarchy.Presentation layer is with after operation layer separates, separately can be according to it to performance demands, and resource allocation as required, thus improved the extended capability of entire system.Simultaneously, after presentation layer and operation layer are removed physical coupling, the logical relation of presentation layer and operation layer can become multi-to-multi by 1 pair 1,1 operation layer can be served a plurality of presentation layers, 1 presentation layer also can use a plurality of operation layers, thereby reaches the distributed system architecture of real layering loose coupling.
After distributed system architecture had been used in application, some business scenario need solve the problem that session information is shared.Such as, server A is disposed and is landed module, and server B is disposed user management module.After the client lands, client's essential information is stored in the session (Session), the user management of server B transaction needs the user basic information in can access session to finish subsequent operation.Need share the situation of session information for this Distributed Application, two kinds of settling modes are arranged usually: a kind of is that session information is stored on the special session status server (State-Server), and another kind is that session information is stored in the conversation database (State-DB).Application server is directly visited State-Server or State-DB, finishes session information is carried out additions and deletions to change and look into when operation, and State-Server or State-DB are responsible for session information is managed.
Though State-Server and State-DB make Distributed Application can share session, but be stored in the mode of home server (State In-Proc) than session information, have significant performance issue: the operation layer function all need all need remote server of extra access to fetch session information before the transaction in processing each time, whole transaction chain is elongated, and the overall performance of system is certain to reduce.Simultaneously, State-Server and State-DB also are easy to become the single-point bottleneck of system.
Java EE .Net and LAMP platform are all supported the mode of State-DB, and this mode also is and the immediate technical scheme of the present invention.Simple Web with the .Net platform is applied as example, and a plurality of HTTP requests are distributed on the different application servers by load-balancing device, share session information between the application server, and session information is stored on the database server of a platform independent.Fig. 1 shows the system schematic of an existing example of State-DB mode.As shown in Figure 1, the HTTP request is distributed to server 1 or server 2 through load equalizer (Load Balancer) 11, and session information is stored on the database of MS sql server 12.Session information is stored in after the independent database, and for each transaction request, application server all needs the extra access database server to obtain session information, and corresponding network latency and database server processes time will be reduced the performance of entire system.
Summary of the invention
The present inventor finds to have problems in the above-mentioned prior art, and has therefore proposed a kind of new technical scheme at least one problem in the described problem.
An object of the present invention is to provide a kind of for Distributed Application session information share technique scheme.
According to a first aspect of the invention, provide a kind of Distributed Application session information to share method, having comprised:
Application server receives the request first time from load equalizer, be saved in conversation database/server with using the session information of setting up, and copy session information is to local session;
Application server receives the subsequent request from load equalizer, comprises session identification in the subsequent request;
Application server reads the updating mark of session information from conversation database/server according to session identification;
If the updating mark indication does not need to upgrade session information, then the application on the application server is handled subsequent request according to the session information of local session.
Alternatively, this method also comprises: if updating mark indication needs upgrade session information, then application server is from conversation database/server update session information; Application on the application server is handled subsequent request according to the session information that upgrades.
Alternatively, the subsequent request that application server receives from load equalizer also comprises before: load equalizer receives the subsequent request from client, keeps subsequent request is assigned to application server by session.
Alternatively, application server comprises from the updating mark that conversation database/server reads session information according to session identification:
Application server judges whether store the session information corresponding with session identification in the local session;
If do not store the session information corresponding with session identification, then application server reads session information according to session identification from conversation database/server;
If store the session information corresponding with session identification, application server reads the updating mark of session information from conversation database/server according to session identification.
Alternatively, application server comprises from the updating mark that conversation database/server reads session information according to session identification:
Application server judges whether transaction has disposed the State-InProc attribute, if then use the session information that directly uses local session and handle subsequent request;
Otherwise application server reads the updating mark of session information from conversation database/server according to session identification.
According to a further aspect in the invention, provide a kind of application server, comprising:
The session information generation module is used for receiving the request first time from load equalizer, be saved in conversation database/server with using the session information of setting up, and copy session information is to local session;
The session identification acquisition module is used for receiving the subsequent request from load equalizer, comprises session identification in the subsequent request;
The updating mark acquisition module is for the updating mark that reads session information according to session identification from conversation database/server;
The subsequent request processing module if the updating mark indication does not need to upgrade session information, makes the application on the application server handle subsequent request according to the session information of local session.
Alternatively, if the updating mark indication needs to upgrade session information, then the subsequent request processing module is from conversation database/server update session information, and the application on the application server is handled subsequent request according to the session information that upgrades.
Alternatively, the updating mark acquisition module comprises:
The local session judging unit, be used for judging whether local session stores the session information corresponding with session identification, if do not store the session information corresponding with session identification, then send session information to the session information reading unit and read message, otherwise, send updating mark to the updating mark reading unit and read message, session information reads message and updating mark and reads and comprise session identification in the message;
The session information reading unit is used for receiving session information and reads message, reads session information according to session identification from conversation database/server;
The updating mark reading unit is used for receiving updating mark and reads message, reads the updating mark of session information from conversation database/server according to session identification.
Alternatively, the updating mark acquisition module also comprises: the determined property unit, the updating mark that is used for receiving from the local session judging unit reads message, judge whether transaction has disposed the State-InProc attribute, if, then do not transmit updating mark to the updating mark reading unit and read message, use the session information that directly uses local session and handle subsequent request; Otherwise, transmit updating mark to the updating mark reading unit and read message.
According to another aspect of the invention, provide a kind of Distributed Application session information shared system, comprise above-mentioned application server, and load equalizer; Load equalizer receives the subsequent request from client, keeps subsequent request is assigned to application server by session.
An advantage of the present invention is, after the subsequent request of application server reception from load equalizer, obtain updating mark according to session identification from conversation database/server, for the session that does not need to upgrade, directly handle subsequent request according to the session information of local session, mix and use the local storage of session and session remote storage dual mode, by reducing the long-range reading times of session information, thereby the distributed shared expense of session information is significantly reduced, effectively improve systematic function.
With reference to the detailed description of accompanying drawing to exemplary embodiment of the present invention, it is clear that further feature of the present invention and advantage thereof will become by following.
Description of drawings
The accompanying drawing that constitutes the part of specification has been described embodiments of the invention, and is used for explaining principle of the present invention together with the description.
With reference to accompanying drawing, according to following detailed, can be expressly understood the present invention more, wherein:
Fig. 1 shows the system schematic of an existing example of State-DB mode.
Fig. 2 illustrates the flow chart of sharing an embodiment of method according to Distributed Application session information of the present invention.
Fig. 3 illustrates the flow chart of sharing another embodiment of method according to Distributed Application session information of the present invention.
Fig. 4 illustrates the structure chart according to an embodiment of application server of the present invention.
Fig. 5 illustrates the structure chart according to another embodiment of application server of the present invention.
Fig. 6 illustrates the schematic diagram according to an example of embodiment of the present invention.
Embodiment
Describe various exemplary embodiment of the present invention in detail now with reference to accompanying drawing.It should be noted that: unless specify in addition, the parts of setting forth in these embodiments and positioned opposite, numeral expression formula and the numerical value of step do not limit the scope of the invention.
Simultaneously, should be understood that for convenience of description that the size of the various piece shown in the accompanying drawing is not to draw according to the proportionate relationship of reality.
Below be illustrative to the description only actually of at least one exemplary embodiment, never as any restriction to the present invention and application or use.
May not be discussed in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but under suitable situation, described technology, method and apparatus should be regarded as authorizing the part of specification.
In shown here and all examples of discussing, it is exemplary that any occurrence should be construed as merely, rather than as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and the letter accompanying drawing below, therefore, in case be defined in a certain Xiang Zaiyi accompanying drawing, then in accompanying drawing subsequently, do not need it is further discussed.
Relational language is explained herein:
The State-InProc mode: session information is stored in the process.
The State-Server/State-DB mode: session information is stored on conversation server/conversation database.
State-M: the technology modules of realizing function of the present invention.
Load balancing: load (task) is carried out balance, shared on a plurality of operating units and carry out, for example crucial application server of Web server, ftp server, enterprise and other mission critical server etc., thus finish the work task jointly.
Session keeps: session keeps just referring at load equalizer so a kind of mechanism is arranged, can identify the association of doing reciprocal process between client and the server, when making load balancing, guarantee that also a series of access request that are associated can keep being assigned on the station server.
Fig. 2 illustrates the flow chart of sharing an embodiment of method according to Distributed Application session information of the present invention.
As shown in Figure 2, step 202, application server receives the request first time from load equalizer, be saved in conversation database/server with using the session information of setting up, and copy session information is to local session.Load equalizer is assigned to different application servers by load-balancing technique with request.Application server sends the session identification that generates to load equalizer.
If the updating mark indication needs to upgrade session information, then application server reads the session information of renewal from conversation database/server, and the application on the application server is handled subsequent request according to the session information that upgrades.
In above-described embodiment, after the subsequent request of application server reception from load equalizer, obtain updating mark according to session identification from conversation database/server, for the session that does not need to upgrade, directly handle subsequent request according to the session information of local session, have the advantage of State-InProc and State-DB mode concurrently, the performance that distributed conversation is shared is significantly improved.
Fig. 3 illustrates the flow chart of sharing another embodiment of method according to Distributed Application session information of the present invention.
As shown in Figure 3, step 302, load equalizer receives the request first time from client, should ask to distribute to application server by load-balancing technique.
Are are step 310, application server judged according to session identification and stored this session information in the local session? if, then continue step 312, otherwise, step 316 continued.
Does step 314 judge whether that according to updating mark needs upgrade session information? if, continue step 316, otherwise, step 318 continued.
Enterprise-level application needs conversation server or independent database server to make a plurality of Distributed Application share session information usually.In above-described embodiment, utilize the session of load-balancing device to paste characteristic, mix and use the local storage of session and session remote storage dual mode, by reducing the long-range reading times of session information, thereby the distributed shared expense of session information is significantly reduced, effectively improve systematic function.
In one embodiment, application server judges whether transaction (being user's request) has disposed the State-InProc attribute, if then use the session information that directly uses local session and handle subsequent request; Otherwise application server just reads the updating mark of session information from conversation database/server according to session identification.For the transaction of having disposed the State-InProc attribute, because it directly reads session information from home server, there is not the remote session visit in the system that makes, and its performance will be further enhanced.
Fig. 4 illustrates the structure chart according to an embodiment of application server of the present invention.As shown in Figure 4, this application server comprises: session information generation module 41, be used for receiving the request first time from load equalizer, and be saved in conversation database/server with using the session information of setting up, and copy session information is to local session; Session identification acquisition module 42 is used for receiving the subsequent request from load equalizer, comprises session identification in the subsequent request; Updating mark acquisition module 43 is for the updating mark that reads session information according to session identification from described conversation database/server; Subsequent request processing module 44 if the updating mark indication does not need to upgrade session information, makes the application on the application server handle subsequent request according to the session information of local session.If the updating mark indication needs to upgrade session information, then subsequent request processing module 44 is from conversation database/server update session information, and the application on the application server is handled subsequent request according to the session information that upgrades.
Fig. 5 illustrates the structure chart according to another embodiment of application server of the present invention.As shown in Figure 5, this application server comprises: session information generation module 41, session identification acquisition module 42, updating mark acquisition module 53 and subsequent request processing module 44.Wherein, session information generation module 41, session identification acquisition module 42 and subsequent request processing module 44 can be described referring to the correspondence of above-described embodiment, for being not described in detail at this for purpose of brevity.Updating mark acquisition module 53 comprises: local session judging unit 531, be used for judging whether local session stores the session information corresponding with session identification, if do not store the session information corresponding with session identification, then send session information to the session information reading unit and read message, otherwise, send updating mark to the updating mark reading unit and read message, session information reads message and updating mark and reads and comprise session identification in the message; Session information reading unit 532 is used for receiving session information and reads message, reads session information according to session identification from conversation database/server; Updating mark reading unit 534 is used for receiving updating mark and reads message, reads the updating mark of session information from described conversation database/server according to session identification.
In one embodiment, described updating mark acquisition module 53 also comprises: determined property unit 533, the updating mark that is used for receiving from the local session judging unit reads message, judge whether transaction has disposed the State-InProc attribute, if, then do not transmit updating mark to the updating mark reading unit and read message, use the session information that directly uses local session and handle subsequent request; Otherwise, transmit updating mark to the updating mark reading unit and read message.
Fig. 6 illustrates the schematic diagram according to an example of embodiment of the present invention.As shown in Figure 6, this example by realizing a session processing module (hereinafter to be referred as State-M) 62, makes application not only can have the performance of approximate State-InProc but also can enjoy the distributed nature that State-DB supports based on load equalizer 61.Whole system has been used load equalizer, so State-M can use " session maintenance " characteristic.For the Http request first time, State-M is responsible for that the session information of setting up is used in this locality and is saved on the conversation database 63, and copies a to local session.After load equalizer is received Http request for the second time, on the server before request can being forwarded to, at this moment State-M reads the updating mark of session information from database, if definite needs upgrade then fetch all session informations, if do not need to upgrade, then directly allow local the application use local session.
In addition, State-M also support the to conclude the business State-InProc attribute of granularity, insensitive to the change of session information as certain transaction, then can dispose the State-InProc attribute, State-M can directly use local session for this transaction request like this, thereby further reduces the expense that distributed conversation is shared.
Do not use frequently for session information change, between application server and the State-DB mutual data in most of the cases by the whole session Information Compression to the state timestamp.And for the transaction of having disposed the State-InProc attribute, because it directly reads session information from home server, there is not the remote session visit in the system that makes, and its performance will be further enhanced.
So far, described in detail according to Distributed Application session information of the present invention shared method, system and application server.For fear of covering design of the present invention, details more known in the field are not described.Those skilled in the art can understand fully and how implement technical scheme disclosed herein according to top description.
May realize method and system of the present invention in many ways.For example, can realize method and system of the present invention by any combination of software, hardware, firmware or software, hardware, firmware.The said sequence that is used for the step of described method only is in order to describe, and the step of method of the present invention is not limited to above specifically described order, unless otherwise specify.In addition, in certain embodiments, can be the program that is recorded in the recording medium with the invention process also, these programs comprise for the machine readable instructions that realizes the method according to this invention.Thereby the present invention also covers the recording medium that storage is used for the program of execution the method according to this invention.
Though by example specific embodiments more of the present invention are had been described in detail, it should be appreciated by those skilled in the art that above example only is in order to describe, rather than in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can under situation about not departing from the scope of the present invention with spirit, above embodiment be made amendment.Scope of the present invention is limited by claims.
Claims (10)
1. a Distributed Application session information is shared method, it is characterized in that, comprising:
Application server receives the request first time from load equalizer, is saved in conversation database/server with using the session information of setting up, and copies described session information to local session;
Described application server receives the subsequent request from described load equalizer, comprises session identification in the described subsequent request;
Described application server reads the updating mark of described session information from described conversation database/server according to described session identification;
If described updating mark indication does not need to upgrade described session information, then the application on the described application server is handled described subsequent request according to the described session information of local session.
2. method according to claim 1 is characterized in that, also comprises:
If described updating mark indication needs to upgrade described session information, then described application server is from the described session information of described conversation database/server update;
Application on the described application server is handled described subsequent request according to the described session information that upgrades.
3. method according to claim 1 is characterized in that, the subsequent request that described application server receives from described load equalizer also comprises before:
Described load equalizer receives the subsequent request from client, keeps described subsequent request is assigned to described application server by session.
4. method according to claim 1 is characterized in that, described application server comprises from the updating mark that described conversation database/server reads described session information according to described session identification:
Described application server judges whether store the session information corresponding with described session identification in the local session;
If do not store the session information corresponding with described session identification, then described application server reads described session information according to described session identification from described conversation database/server;
If store the session information corresponding with described session identification, described application server reads the updating mark of described session information from described conversation database/server according to described session identification.
5. method according to claim 4 is characterized in that, described application server comprises from the updating mark that described conversation database/server reads described session information according to described session identification:
Described application server judges whether transaction has disposed the State-InProc attribute, if then use and directly use the described session information of local session to handle described subsequent request;
Otherwise described application server reads the updating mark of described session information from described conversation database/server according to described session identification.
6. an application server is characterized in that, comprising:
The session information generation module is used for receiving the request first time from load equalizer, is saved in conversation database/server with using the session information of setting up, and copies described session information to local session;
The session identification acquisition module is used for receiving the subsequent request from described load equalizer, comprises session identification in the described subsequent request;
The updating mark acquisition module is for the updating mark that reads described session information according to described session identification from described conversation database/server;
The subsequent request processing module if the indication of described updating mark does not need to upgrade described session information, makes the application on the application server handle described subsequent request according to the described session information of local session.
7. server according to claim 6 is characterized in that,
If described updating mark indication needs to upgrade described session information, then described subsequent request processing module is from the described session information of described conversation database/server update, and the application on the described application server is handled described subsequent request according to the described session information that upgrades.
8. server according to claim 6 is characterized in that, described updating mark acquisition module comprises:
The local session judging unit, be used for judging whether local session stores the session information corresponding with described session identification, if do not store the session information corresponding with described session identification, then send session information to the session information reading unit and read message, otherwise, send updating mark to described updating mark reading unit and read message, described session information reads message and described updating mark and reads and comprise described session identification in the message;
The session information reading unit is used for receiving session information and reads message, reads described session information according to described session identification from described conversation database/server;
The updating mark reading unit is used for receiving updating mark and reads message, reads the updating mark of described session information from described conversation database/server according to described session identification.
9. server according to claim 8 is characterized in that, described updating mark acquisition module also comprises:
The determined property unit, the updating mark that is used for receiving from described local session judging unit reads message, judge whether transaction has disposed the State-InProc attribute, if, then do not transmit described updating mark to described updating mark reading unit and read message, use and directly use the described session information of local session to handle described subsequent request; Otherwise, transmit described updating mark to described updating mark reading unit and read message.
10. a Distributed Application session information shared system is characterized in that, comprise as any described application server in the claim 6 to 9, and load equalizer;
Described load equalizer receives the subsequent request from client, keeps described subsequent request is assigned to described application server by session.
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