CN108540556A - A kind of fining Session clusters shared system and method based on cache - Google Patents
A kind of fining Session clusters shared system and method based on cache Download PDFInfo
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- CN108540556A CN108540556A CN201810333845.0A CN201810333845A CN108540556A CN 108540556 A CN108540556 A CN 108540556A CN 201810333845 A CN201810333845 A CN 201810333845A CN 108540556 A CN108540556 A CN 108540556A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
- G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
- G06F12/0893—Caches characterised by their organisation or structure
- G06F12/0897—Caches characterised by their organisation or structure with two or more cache hierarchy levels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2212/00—Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
- G06F2212/10—Providing a specific technical effect
- G06F2212/1032—Reliability improvement, data loss prevention, degraded operation etc
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2212/00—Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
- G06F2212/15—Use in a specific computing environment
- G06F2212/154—Networked environment
Abstract
The invention discloses a kind of fining Session clusters shared system and method based on cache,It is characterized in that,Including client,Load balancing module,Application server,Level cache module,The load balancing module is used to user's request of client being transmitted to application server,The quantity of the application server can be one or more,The application server is connected with level cache module,Filter is equipped in the application server,L2 cache module and SessionManager (Session management) module,The SessionManager modules act on behalf of Session for primary Session to be packaged into,The SessionManager modules read-write level cache module and L2 cache module,Reach and solves the concurrent reading and writing conflict that traditional approach easily occurs while meeting performance requirement,The effect of situations such as loss of data.
Description
Technical field
The present invention relates to the distributed conversation management domains of computer processing technology, slow based on high speed more particularly to one kind
The fining Session clusters shared system and method deposited.
Background technology
With the high speed development of internet, B/S frameworks large-scale application, while a large amount of online user proposes service
More and more high function and performance requirement.It is the effective scheme for coping with the problem that single machine service, which turns to service cluster,.
Thereupon, in such a way that Session in HTTP Cookie and application container keeps user's context state
It is affected.Original mode requires to be routed to other servers in Session contents in other servers or balance policy
In the case of, it will be unable to get the Session based on application memory.At present, it has been suggested that the methods of Session data sharings solves
The certainly problem, specially：Each Web server is shared by sharing application memory, or by a storage server
Session data.It, all can be by the sharing mode by other in this way when any one server S ession data change
Web server has perception.
But the mode of above-mentioned shared drive is affected to application performance, has larger dependence to container technique type selecting, together
When seriously affect cluster expansion.And Session data are shared by storage server, read-write every time will transmit mass data,
And situations such as read-write of multiple servers is easy conflict under complications, and data can be covered mutually, there are dirty data or write loss.
Multi-level buffer is rationally utilized therefore, it is necessary to a kind of, that is, meets performance requirement, while solving what traditional approach easily occurred
The fining Session clusters shared system and method based on cache of situations such as concurrent reading and writing conflict, loss of data.
Invention content
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a kind of essence based on cache
Refine Session clusters shared system and method.
In order to solve the above technical problems, to provide a kind of fining Session clusters based on cache shared by the present invention
System, which is characterized in that including client, load balancing module, application server, level cache module, the load
Balance policy module is used to user's request of client being transmitted to application server, and the quantity of the application server can be
One or more, the application server is connected with level cache module, and it is slow that filter, two level are equipped in the application server
Storing module and SessionManager (Session management) module, the SessionManager modules are used for will be primary
Session, which is packaged into, acts on behalf of Session, the SessionManager modules read-write level cache module and L2 cache mould
Block.
Described act on behalf of is equipped with MapProxy modules and Map modules in Session, the MapProxy modules and Map modules
It is stored separately separate management in level cache module.
The level cache module can be made of the centralization caching of Redis clusters or other high speeds, to realize each
Session is acted on behalf of using a Fast synchronization.The L2 cache module can be configured to application level memory sharing caching or
The other ThreadLocal cachings of thread-level.
The application server can be answering for Tomcat servers, Jetty servers or other any support servlet
Use container.
A kind of fining Session cluster sharing methods based on cache, it is characterised in that：Include the following steps：
1. application server receives user's request from client, SessionManager module creations are primary
Session is simultaneously packaged into and acts on behalf of Session, and filter trial obtains SessionId from the cookie of primary Session；Packet
Dress mode is to act on behalf of Session to realize the HttpSession interfaces of standard, and hold primary Session by class combination
Reference, as the privately owned member variable for acting on behalf of Session.
2.SessionManager modules are according to the level cache module and two level of SessionId administration agents Session
Cache module；
After 3. application is got by SessionManager modules and acts on behalf of Session, by setAttribute (),
GetAttribute () method reads and writes the attribute for acting on behalf of Session, acts on behalf of Session and judges whether the attribute of read-write is full
Sufficient configuration rule, if it is satisfied, then directly being carried out to level cache module by acting on behalf of the MapProxy modules inside Session
Read-write, if conditions are not met, the Map modules acted on behalf of inside Session that then be used directly are written and read, with acting on behalf of Session
Carry out serializing and unserializing；
4. acting on behalf of Session to be disposed, before application server responds back to client, in the filter to agency
Session is cleared up, and SessionManager modules will act on behalf of Session data and write back level cache module in preserving
Set attribute.
The step 2 includes：
201. filters judge that cookie whether there is the SessionId for acting on behalf of Session, if it does not exist, then
SessionManager modules generate it Session that acts on behalf of containing SessionId, and SessionId therein with
Cookie is written in the request of family, using the SessionId of establishment as the Key of caching, acts on behalf of Session and is stored in level-one as value
In cache module and according to same policy store in L2 cache module；
If there are SessionId, SessionManager modules to be read from L2 cache module by 202. cookie
Session is acted on behalf of in SessionId bindings；
If the 203. L2 cache moulds Session in the block that acts on behalf of can not be obtained, generation is read from level cache module
Manage Session；
204.SessionManager modules will act on behalf of Session and be buffered in the application memory of L2 cache module or ask
It asks in thread, if the level cache mould Session in the block that acts on behalf of can not be obtained or illegal, in return to step 201
SessionManager modules generate the Session that acts on behalf of containing SessionId and start to execute.
The step 3 includes：
After 301. applications are got by SessionManager modules and act on behalf of Session, by setAttribute (),
GetAttribute () method reads and writes the attribute for acting on behalf of Session, by the Key of read-write and acts on behalf of that Session is associated to be matched
Rule is set to be matched；
302. for being unsatisfactory for the attribute Key of configuration rule, and direct read/write is applied to be acted on behalf of in interior L2 cache
The Map modules of Session；
303. for meeting the attribute Key of configuration rule, then straight by acting on behalf of the ProxyMap modules of Session
It connects and level cache module is written and read, Key, Value of the ProxyMap agencies read-write are by ProxyMap module foundations
SessionId and Key management.
When L2 cache module is configured to application level, it is necessary to which it is small that the L2 cache out-of-service time in application server is set
In the level cache time.
The SessionId is unduplicated character string at random.The SessionId is unduplicated character at random
String.
The advantageous effect that the present invention is reached:
(1) present invention by rationally utilize multi-level buffer, be greatly reduced Session Data Serializations, unserializing and
The performance consumption of data transmission, different types of caching form application can configure on demand；
(2) present invention is distinguished by technological means and is read by splitting by usage scenario to the data in traditional Session
WriteMode.Meet performance requirement, while solving situations such as concurrent reading and writing conflict, loss of data that traditional approach easily occurs.
Description of the drawings
Fig. 1 is the system structure schematic diagram of exemplary embodiment of the present invention；
Fig. 2 is the stream that fining session controls are carried out based on two-level cache framework of exemplary embodiment of the present invention
Cheng Tu；
Specific implementation mode
Understand the purpose of the present invention and technical solution to further illustrate, embodies its advantage, below in conjunction with specific embodiment,
And it with reference to attached drawing, is described further.It should be appreciated that embodiment described herein is only used for explaining the present invention, it is not intended as limiting
It is fixed.
The present invention is to be total to the Session data in original application by way of the cache farm independently of application
Storage is enjoyed, to achieve the purpose that different application can share Session contexts.The independent cache farm we be referred to as
For level cache, the level cache module can be made of the centralization caching of Redis clusters or other high speeds, main purpose
It is to realize that Fast synchronization acts on behalf of Session between each application.In addition, in order to cope with, each application is frequent whithin a period of time to visit
Ask Session related datas, improving frequent readwrite performance reduces level cache pressure, and each application, which can have in local memory, delays
It deposits, we term it L2 caches.This level cache asks the frequency of level-one request mainly for reducing.Memory hierarchy caching can
By multiple share requests, not destroyed after request, the synchronization of time intenals ratio ThreadLocal times are long.ThreadLocal
It is buffered in request initial creation, request terminates to destroy, and is that this more operation are shared in request, caches narrow range, synchronous frequency ratio
Memory hierarchy is high, and dirty data situation is few, using configuring according to demand.L2 cache using scene according to respectively can be configured to answer
It is realized with the memory sharing caching of rank or the other ThreadLocal cachings of thread-level is realized.By to primary Session's
It packs, what is stored in caching is to adapt to the new agency for sharing storage demand serializability it is necessary to information after packing
Session.Meanwhile this act on behalf of inside Session containing ProxyMap be used for act on behalf of former Session getAttribute and
SetAttribute methods are directly read and write by level cache with Key, Value that achievement unit divides special requirement high concurrent to handle,
Not with act on behalf of Session and carry out serializing/unserializing together.It Key, Value inside ProxyMap and acts on behalf of Session and exists
It is to be stored separately separate management in level cache.The level-one of Session, L2 cache are acted on behalf of by sessionManager foundations
SessionId is managed.Key, Value of ProxyMap agency's read-writes are managed by ProxyMap according to SessionId and Key.
Fig. 1 is the system construction drawing for realizing two-level cache in the embodiment of the present invention based on cache server.Load balancing root
Each application server is forwarded the request to according to strategy, act on behalf of Session in application server is managed by SessionManager, from
L2 cache/level cache read-write.
That it goes without doing is specifically limited for load balancing before Web applications, can be the modes such as weight, weighted polling, herein
The load balancing of embodiment can use nginx upstream easy configurations.Using interior SessionManage realizations and application service
Device is unrelated, and the WEB containers for arbitrarily meeting EE specifications on the market, such as Tomcat, Jetty can be selected.Level cache, which is realized, to be used
Redis clusters, rapidly and efficiently, and structure-rich.
Fig. 2 is that the Session read methods based on two-level cache framework realize step in the embodiment of the present invention：
Step 101：Server receives client request, this step, what packing container was realized
HttpServletRequest is the Request that oneself is realized, by getSession etc. and Session relevant operations agency to certainly
In the SessionManager that oneself realizes.
Step 102：Judge whether carry sessionId in the cookie of user's request.If it is determined that in request cookie
Not comprising sessionId, then 103 are entered step, otherwise enters step 105.
Step 103：It creates and acts on behalf of Session after new packaging.SessionId is unduplicated character string at random.
And cookie is written in the SessionId in Response, it is used for subsequent request, maintains session.
Step 104：The SessionId that previous step is created acts on behalf of Session and is stored in as value as the Key of caching
In level cache Redis clusters.Also according to L2 cache of the policy store in application.L2 cache is configurable to apply
Rank or thread rank.Application level can also be arranged again using the interior L2 cache out-of-service time, it is necessary to be less than level cache
Time.
Step 105：SessionManager attempts to read agency from the interior L2 cache of application according to sessionId
Session does not get and then reads Session from level cache Redis clusters
Step 106：Judge whether to read the legal Session that acts on behalf of, that is, acts on behalf of Session presence, and effectively (data
It is legal, do not cross the term of validity).If result is no, 103 are entered step.The legal Session that acts on behalf of is read then to enter step
107。
Step 107：If the 106 legal Session that act on behalf of are read from level cache, applied according to policy update in
L2 cache.
Step 108：After Session is acted on behalf of in acquisition, can call act on behalf of Session getAttribute and
SetAttribute methods, the attributes to acting on behalf of Session are written and read.At this point, can be judged according to Key, if symbol
Close the condition for needing Precise control of configuration.If it is satisfied, then by acting on behalf of the ProxyMap inside Session directly to one
Grade caching is written and read, rather than is put into and is acted on behalf of inside Session in Map.If being unsatisfactory for the configuration of Precise control, directly
It is written and read using the Map acted on behalf of inside Session, with acting on behalf of the serializing and unserializing that Session is cached.
Step 109：Request terminates, and once additional write back can act on behalf of Session, to ensure to act on behalf of built in Session
Some attributes, such as last access time and can not preserved by the variable of ProxyMap direct read/write level caches.
Step 110：Server responds back to client.
Present invention is mainly used for provide a kind of system and method.
Above example does not limit the present invention in any way, every to be made in a manner of equivalent transformation to above example
Other improvement and application, belong to protection scope of the present invention.
Claims (9)
1. a kind of fining Session cluster shared systems based on cache, which is characterized in that including client, load
Balance policy module, application server, level cache module, the load balancing module is for asking the user of client
It asks and is transmitted to application server, the quantity of the application server can be one or more, the application server and level-one
Cache module is connected, and filter, L2 cache module and SessionManager (Session are equipped in the application server
Management) module, the SessionManager modules act on behalf of Session for primary Session to be packaged into, described
SessionManager modules read and write level cache module and L2 cache module.
2. as described in claim 1 a kind of, it is characterised in that：Described act on behalf of is equipped with MapProxy modules and Map in Session
Module, the MapProxy modules are stored separately separate management with Map modules in level cache module.
3. as claimed in claim 2 a kind of, it is characterised in that：The level cache module can be by Redis clusters or other height
The centralization caching of speed is constituted, and to realize, Fast synchronization acts on behalf of Session between each application.The L2 cache module can match
It is set to the memory sharing caching or the other ThreadLocal cachings of thread-level of application level.
4. as claimed in claim 3 a kind of, it is characterised in that：The application server can be Tomcat servers, Jetty
Server or other any application containers for supporting servlet.
5. a kind of fining Session clusters based on cache carried out according to one of the claim 1-4 systems are total
Enjoy method, it is characterised in that：Include the following steps：
1. application server receives user's request from client, the primary Session of SessionManager module creations is simultaneously
It is packaged into and acts on behalf of Session, filter trial obtains SessionId from the cookie of primary Session；Manner of packing is generation
The HttpSession interfaces that Session realizes standard are managed, and hold the reference of primary Session by class combination, by it
As the privately owned member variable for acting on behalf of Session.
2.SessionManager modules are according to the level cache module and L2 cache of SessionId administration agents Session
Module；
After 3. application is got by SessionManager modules and acts on behalf of Session, by setAttribute (),
GetAttribute () method reads and writes the attribute for acting on behalf of Session, acts on behalf of Session and judges whether the attribute of read-write is full
Sufficient configuration rule, if it is satisfied, then directly being carried out to level cache module by acting on behalf of the MapProxy modules inside Session
Read-write, if conditions are not met, the Map modules acted on behalf of inside Session that then be used directly are written and read, with acting on behalf of Session
Carry out serializing and unserializing；
4. acting on behalf of Session to be disposed, before application server responds back to client, in the filter to agency
Session is cleared up, and SessionManager modules will act on behalf of Session data and write back level cache module in preserving
Set attribute.
6. a kind of fining Session cluster sharing methods based on cache as claimed in claim 5, feature exist
In the step 2 includes：
201. filters judge that cookie whether there is the SessionId for acting on behalf of Session, if it does not exist, then
SessionManager modules generate it Session that acts on behalf of containing SessionId, and SessionId therein with
Cookie is written in the request of family, using the SessionId of establishment as the Key of caching, acts on behalf of Session and is stored in level-one as value
In cache module and according to same policy store in L2 cache module；
If there are SessionId, SessionManager modules to be read from L2 cache module by 202. cookie
Session is acted on behalf of in SessionId bindings；
If the 203. L2 cache moulds Session in the block that acts on behalf of can not be obtained, agency is read from level cache module
Session；
204.SessionManager modules are buffered in the application memory or request line of L2 cache module by Session is acted on behalf of
Cheng Zhong, if the level cache mould Session in the block that acts on behalf of can not be obtained or illegal, in return to step 201
SessionManager modules generate the Session that acts on behalf of containing SessionId and start to execute.
7. a kind of fining Session cluster sharing methods based on cache as claimed in claim 6, feature exist
In the step 3 includes：
After 301. applications are got by SessionManager modules and act on behalf of Session, by setAttribute (),
GetAttribute () method reads and writes the attribute for acting on behalf of Session, by the Key of read-write and acts on behalf of that Session is associated to be matched
Rule is set to be matched；
302. for being unsatisfactory for the attribute Key of configuration rule, and direct read/write is applied in interior L2 cache and acts on behalf of Session
Map modules；
303. for meeting the attribute Key of configuration rule, then directly right by acting on behalf of the ProxyMap modules of Session
Level cache module is written and read, and Key, Value of the ProxyMap agencies read-write are by ProxyMap module foundations
SessionId and Key management.
8. a kind of method as claimed in claim 6, which is characterized in that, must when L2 cache module is configured to application level
The L2 cache out-of-service time is less than the level cache time in palpus setting application server.
9. a kind of method as claimed in claim 6, which is characterized in that the SessionId is unduplicated character at random
String.
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| CN109257448A (en) * | 2018-11-21 | 2019-01-22 | 网易（杭州）网络有限公司 | A kind of synchronous method and device of session information, electronic equipment, storage medium |
| CN109274751A (en) * | 2018-10-08 | 2019-01-25 | 中邮科通信技术股份有限公司 | A kind of session sharing method rewriteeing servlet request |
| CN109408224A (en) * | 2018-09-17 | 2019-03-01 | 华为技术有限公司 | Method of data synchronization, distributed system and application node |
| CN109617943A (en) * | 2018-10-22 | 2019-04-12 | 平安科技（深圳）有限公司 | Data cache method, device and storage medium, computer equipment |
| WO2021189229A1 (en) * | 2020-03-24 | 2021-09-30 | Citrix Systems, Inc. | Inter-application relevance management for application virtualization platform |
| CN113722363A (en) * | 2021-08-19 | 2021-11-30 | 成都民航西南凯亚有限责任公司 | Cache public component and implementation, installation and operation method thereof |
| CN115442220A (en) * | 2022-08-24 | 2022-12-06 | 浪潮云信息技术股份公司 | Websocket Session sharing method and system based on cluster deployment |
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| CN113722363B (en) * | 2021-08-19 | 2023-09-12 | 成都民航西南凯亚有限责任公司 | Cache public assembly and implementation, installation and operation methods thereof |
| CN115442220A (en) * | 2022-08-24 | 2022-12-06 | 浪潮云信息技术股份公司 | Websocket Session sharing method and system based on cluster deployment |
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|---|---|
| CN108540556B (en) | 2019-09-10 |
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