CN106845746A - A kind of cloud Workflow Management System for supporting extensive example intensive applications - Google Patents
A kind of cloud Workflow Management System for supporting extensive example intensive applications Download PDFInfo
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- CN106845746A CN106845746A CN201610417340.3A CN201610417340A CN106845746A CN 106845746 A CN106845746 A CN 106845746A CN 201610417340 A CN201610417340 A CN 201610417340A CN 106845746 A CN106845746 A CN 106845746A
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- G—PHYSICS
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0633—Workflow analysis
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L67/10—Protocols in which an application is distributed across nodes in the network
Abstract
Workflow management technology subdomains and field of cloud computer technology that a kind of cloud Workflow Management System (hereinafter referred to as cloud workflow) for supporting extensive example intensive applications belongs in computer software engineering field, the main work process flow management including under cloud computing environment, performs service, monitoring, load balancing, early warning, automatic telescopic, execution service cloning, charging with etc. technology subdomains；Cloud workflow solves the problems, such as that work on hand flow management technology cannot flexibly, economically support extensive example intensity workflow application using cloud computing；The system uses Java, the computer software technologies such as HTML, CSS, Javascript are developed, and the technologies such as Web service, Eclipse Rich Client Platform plug-in units are integrated with, it is mainly used in government, enterprises and institutions' BPM, operation system integrated etc..
Description
Art
The present invention relates to workflow management technology field and field of cloud computer technology, it is characterized in that under cloud computing environment
Work process flow is managed, performs service, monitoring, load balancing, early warning, automatic telescopic, execution service cloning and charging.This hair
It is bright to be mainly used in government, enterprise, the management of the business (abbreviation operation flow) with flow characteristics of public institution.
Background technology
Workflow is the operation flow that nineteen ninety-five is developed by WFMC and proposed according to Automated Technology in Office
Automation concept.Workflow technology be intended to information technology to government, enterprise, public institution operation flow (such as office workflow,
Process for reimbursing expense, administrative examination and approval flow, insurance business approval process, credit examination ＆ approval, goods entry, stock and sales flow, customer service flow, movement
Mobile phone short message charging handling process etc.) it is modeled, and these models are made up of multiple service links or activity, and can be according to one
Fixed order is performed under workflow technology control, and each model is finished and is up to set business objective.By 20 years
Development, workflow technology is gradually ripe, and one of the Core Feature as many operation system products.In operation system
Business with flow characteristics can give workflow technology to solve.
With the continuous growth of business event, many ultra-large example intensity workflow applications, typical case are occurred in that
As the administrative examination and approval in E-Government, mobile phone communication short message billing, banking examination ＆ approval, stock exchange Day Trading data processing
Flow etc..These workflow application characteristics are to produce millions of or even ten million meter case, growing number cycle all the time
Property aperiodically steeply rises or declines.In face of these large-scale applications, existing workflow management technology cannot have
Effect supports such application, and it is primarily present problems with：
1st, system architecture autgmentability is poor, and configuration is complicated.Work at present Workflow Management System sets up high-performance server cluster
Improve and concurrently perform workflow instance ability, as workflow instance quantity steeply rises, required system resource also increases sharply,
Work on hand Workflow Management System increases oncurrent processing ability by expansion service device cluster.But the extension of server cluster is needed
Complicated configuration is wanted, while once configuring good, when workflow instance quantity declines, needs to reconfigure again to have reduced cluster
Quantity, can otherwise cause the wasting of resources.And for the application that workflow instance quantity is continually changing, server cluster can only then be protected
The number of servers of maximum is held, in case locking system cannot cannot meet demand when workflow instance quantity is maximum.
2nd, systems soft ware hardware cost is high.Work on hand Workflow Management System due to by extend high-performance server cluster come
The ability for concurrently performing workflow instance is improved, thus increased hardware and software and carry out cost of investment.
3rd, cannot real-time perception system mode.In current Workflow Management System, each service in server cluster
Device each independently executes Workflow enactment service treatment request, and system cannot just perceive its load condition, any one server
Overburden runs, then the risk that presence server crashes, and causes service data loss.
Cloud computing is its deep influence in recent years in the rise of computer software circle with revolutionary new technology
Even change traditional software and design and produce pattern, or even gradually change the business and service mode of software industry.
Under cloud computing environment, Software for Design is converted to client-high in the clouds pattern by traditional client-server arrangement.Client software
As the client of traditional client/server mode, but high in the clouds software then with the server end of traditional server mode
Difference, it is a virtualization, on a large scale, telescopic (elasticity), can charging server cluster, this cluster can
Scale is extended with the number of requests according to client and downsizing to ensure service quality, this retractility causes cloud computing
Software product can to greatest extent save information technology investment for client, and can to greatest extent ensure software service matter simultaneously
Amount.Client need not pay enormous investment purchase package software, but realize its software with the mode of lease again as before
Demand, according to usage amount come payment software cost of use, with how much how much just paying.There is an appropriate metaphor to describe cloud meter
Calculate, cloud computing causes software service the same with the running water of daily life, natural gas and electricity, opens switch, and service just comes
, start charging, service has been used up, switch is shut, just stop charging.This is traditional client-server arrangement software institute
Cannot accomplish.Using the technical program, Workflow Management System is possible to flexibly, economically support that extensive example is intensive
Type workflow application.
The content of the invention
Technical scheme：As shown in Figure 1, setting in cloud Workflow Management System (hereinafter referred to as cloud workflow)
In meter, by the service component architecture of system in cloud computing environment, in cloud workflow basic module structure (the basic work of cloud workflow
Tool and basic service structure) in, new adjoint instrument and service is added in design, and these components are in cloud workflow fundamental system and cloud
An intermediate layer is constructed between computing environment, makes cloud workflow when extensive example intensive applications are run, by these groups
Part can in real time perceive total system load condition, and dynamically calculate need how many Workflow enactment service complete currently with
And the load in future, if while when Workflow enactment service is idle, idle service can be closed into (release) again, to avoid providing
Source wastes, and cost-effective, so as to greatly strengthen autgmentability, reliability, flexibility and the economy of system.
The main following two parts component of cloud workflow that the inventive method is realized is constituted：Cloud workflow basic module and adjoint
Component.Basic module includes basic tool and basic service.Basic tool includes：
1st, flow definition instrument, it is characterised in that the business demand object definition work process flow model according to user, bag
Include definitim flow structure (order, selection, parallel, loop structure), flow inside global variable, the outside API of access or service
Input/output argument and wait time limit, execution abnormality processing rule, the startup time in Workflow enactment service, startup number
Amount, end time.The instrument can verify that the correctness of all static datas defined above in model, and emulate it in workflow
State during true operation in servicing is performed, so that state parameter, operating-system resources when further analyzing its Dynamic Execution
(CPU, internal memory, network, I/O) and Workflow Management System resource (thread pool, connection pool) occupancy, time loss, human resources
Use (performer if there is manual tasks is set), external system calls inputoutput data, is that Optimized model is carried
For decision support, and model is transferred in Workflow enactment service performs.
2nd, monitoring tools, it is characterised in that can real-time searching, monitoring, tracking all working stream execution in cloud workflow
The workflow instance being currently running in service, and can be according to monitoring demand respectively in flow instance rank and task rank to it
Implementation suspends, terminates, continuing to run with operation, and one or more tasks can also be skipped on task rank.To what is had timed out
Example or task, monitoring personnel can enter edlin and modification as in the flow definition instrument to example, complete modification follow-up
It is continuous to perform.The instrument can also dispatch the workflow instance in Workflow enactment service manually or by strategy, it is also possible to
By the workflow instance of pause from a Workflow enactment service move to other Workflow enactment services in perform.
3rd, do list, it is characterised in that be the interactive tool of cloud workflow execution person participation execution workflow.Cloud
Workflow shows task definition to executor, such as list, data file (Word, Excel, Pdf, Txt, HTML, XML, computer
Source files of program), chart, audio, video, and provide it interactive function, executor's editable modification task definition, input
The task is handed to other executors by reason opinion, execution order, and most task submits to cloud workflow at last, is held with promoting
Row service continues executing with follow-up work.Cloud workflow execution person can be by the new workflow instance of the instrument creation.
Basic service includes：
Workflow enactment service, it is characterised in that comprising one or more Workflow execution engines, dispatches and controls each
Engine start, initialization, execution, pause, abnormal end, one work process flow example of end, engine control workflow instance
Terminated task is gone to by initial task length by length.One or more Workflow enactment services are included in cloud workflow, this
A little services are created by the demand that Workflow enactment service clone service is serviced according to automatic telescopic.Automatic telescopic service can be with
(release) Workflow enactment service is closed according to system requirements.
Cloud workflow includes with instrument and service with component.Include with instrument：
1st, with service definition instrument, it is characterised in that for high in the clouds provides definition instrument with service, design is with service
System resource configuration, definition with service in perform it is regular and tactful, definition with service in data template and system
Template.
2nd, with service monitoring instrument, it is characterised in that monitoring high in the clouds with service working condition, be manual intervention or
Control provides instrument with service execution.
Include with service：
1st, load balancing service, it is characterised in that be the entrance of cloud service in cloud workflow, it is all from client work
The operation requests of tool (basic tool and adjoint instrument) are sent initially to the service.If the operation of workflow instance please
Ask, the service is processed in being forwarded to Workflow enactment service；If inoperative stream example operation is asked, then it is sent to corresponding
Service processing.
2nd, Warning Service, it is characterised in that the system resource being responsible in comprehensive assessment Workflow enactment service is used, and
Early warning is sent when system free time or overload condition.The service can gather all working stream and perform various resources in service, including
CPU, internal memory, I/O interfaces, hard disk, bandwidth, thread pool, the state of connection Pooled resources, and COMPREHENSIVE CALCULATING is carried out to status data obtain
Go out a state composite index, this index reflects the current state of system with percentage, when the index is 0% expression system
Free time, 100% represents system without response, between 0-100%, the multiple half-open intervals of definition represent system low-load,
Standard termination, high capacity, full load, five states of overburden.The service simultaneously is multiple times also by storage and monitoring time segment cutting
Window, each moment calculating state composite index in window, and go out the curve of composite index with conic section regression fit,
And then the State Transferring trend of current state composite index calculated to the curve derivation, then with discrete Markov
Chain carrys out the possibility probability of the state at computing system next moment or multiple moment, and wherein system will be in the shape of maximum probability
State.Meanwhile, the service can also obtain the state of each Workflow enactment service, for load balancing service provides support.
3rd, automatic telescopic service, it is characterised in that stretch refer to current all working stream perform service tend to overload and
When cannot process more operation requests, more new cloud workflows are gone out by Workflow enactment service component clone's service-creation and is held
Row service processes operation requests, and it is a kind of independent behaviour of the workflow extended execution resource of cloud workflow；Contracting refer to
When the execution service of work at present stream tends to idle and resource excess occurs, (release) one or more idle workflows can be closed
Service is performed, to save system resource, it is equally the independent behaviour that cloud workflow shrinks workflow execution resource extent.The clothes
After business performs flexible behavior every time, it is notified that Warning Service carries out comprehensive assessment to the service condition of system resource, if still
It is overload or idle, will persistently stretches, until the service condition of system resource tends to be steady (between overload and free time).
4th, Workflow enactment service component clone service, it is characterised in that be responsible for receiving the wound that automatic telescopic service is sent
The request of Workflow enactment service component is built, is created that cloud Workflow enactment service component is located in being added to system according to request
Operation requests of the reason from client, to reduce the load that current middle all working stream performs service.
5th, billing of services, it is characterised in that the charging regulation or scheme according to cloud workflow are to the workflow reality in system
Example is counted and charging, to control the expenditure cost of cloud workflow user.Accounting management makes the cloud Workflow system can be as
Hosted services system provides workflow service to client.
The instrument of cloud workflow and the collaborative work principle of service inter-module：
Process Definition Tool after then passing through to flow verification and emulation, is passed according to business demand modeling work stream flow
The defeated Work flow model is to being ready to carry out in Workflow enactment service.The operation of monitoring tools monitor in real time each component of cloud workflow
Situation, can send early warning to any exception of system, and be solved automatically using abnormal accident strategy, if cannot solve,
Notify that system manager solves by hand.
Client sends operation requests to cloud service, and load balancing service is connected to request first, will according to request content
Request is forwarded to corresponding service and goes treatment.If inoperative stream example operation is asked, such as match somebody with somebody with the change resource of instrument
Request is put, then according to the content of request, is sent to corresponding service processing；If workflow instance operation requests, such as create
Workflow instance, example list is obtained, Pending tasks lists, pause example/task is obtained, is submitted/skip task to, terminates appointing
Business/example, the service needs first to inquire about working condition or load of the Warning Service to know each Workflow enactment service component
Degree, then forwards requests to be processed in the Workflow enactment service of minimum load, and to full load or extra-heavy work
Stream performs service, and the service is processed all without new request of reallocating to it, it is to avoid it causes exception because load continuous increase.
Workflow enactment service is responsible for performing workflow execution and processing processing workflow instance operation requests, at request
Reason is finished, and result is sent to load balancing service, by the service response to client.Please if creating workflow instance
Ask, Workflow enactment service then search work flow model, and be to create a workflow engine.Engine is initialized and starts work
Stream example, activates first task, flowage structure (order, selection, parallel and circulation) then according to workflow instance, according to
Executing rule is preset in model to activate successively, perform and completion task；If obtaining example list, obtaining Pending tasks list
Request, Workflow enactment service then obtains list and responds to client；If pause, termination example, workflow execution exists
After being connected to request, result is simultaneously responded to client by treatment request；Task includes human task and automatic in workflow instance
Business, if human task, mission bit stream is sent to do list by Workflow enactment service by load balancing service, etc.
Treat performer send operation requests, such as suspended task, submit/skip task, terminated task to, Workflow enactment service is connecing
To after request, treatment is asked and sends result to client and complete task；If autotask, then directly perform and complete
Into task.After workflow engine has performed last task, closed by Workflow enactment service, the shared resource of release.
Workflow enactment service information in Warning Service acquisition system, sets up a registration form record all working stream and performs
Information on services, Workflow enactment service state and calculates total system state composite index, real-time estimate cloud workflow in monitoring form
The following conversion trend of system mode.If monitoring that system future will appear from the free time, Warning Service will send idle early warning and disappear
Breath notifies automatic telescopic service, and early warning information performs Service Detail, automatic telescopic service root comprising system vacant working stream
The Workflow enactment service of simultaneously releasing idling is closed according to early warning information；If monitoring that system future will appear from excess load, the clothes
Business will send overload early warning information and give automatic telescopic service, and early warning information includes the system following moment for overload occur and overload work
Make stream example quantity, the Workflow enactment service quantity that automatic telescopic service extends according to needed for early warning information is calculated, and send
Extension message adds system to the new Workflow enactment service of Workflow enactment service component clone's service-creation, to alleviate system
Overload state.After automatic telescopic service completes release or extended operation, send flexible completion message and notify Warning Service, stretch
Workflow enactment service quantity information of the completion message comprising release and extension, Warning Service will be held according to information updating workflow
Row service registration table, restarts computing system state composite index, continues real-time monitoring system state, and forecasting system is following to be turned
Change trend.
All working stream performs have been turned on, operating and completion workflow in service in billing of services statistical system
Example quantity, the system resource spent by the workflow instance handling capacity and each example of computing system, including each moment
The use percentage of CPU, internal memory usage amount, I/O operation amount, bandwidth usage amount, thread pool usage amount, connection pool usage amount, root
According to the expense of charging regulation calculated examples intensity workflow application, the operating cost of cloud workflow application is controlled, and be periodically
The all bills of client's generation, moon bill, year bill and weekly return, moon sheet and year form.
Beneficial effects of the present invention：From unlike other Workflow Management Systems, the system that this method is realized is basic
Adjoint instrument and serviced component with cloud computing feature are extended on workflow architecture, these components can utilize cloud meter
The Intel Virtualization Technology of calculation is expanded or closes multiple workflow servers rapidly, improves the flexible ability of extension.Meanwhile, cloud meter
Calculate virtual technology workflow server low cost, performance it is good, it is necessary to when be created that come, without when closing, effectively drop
The low cost of investment of Workflow Management System.Can be with the state of real-time perception system, and to system future with serviced component
Load condition is predicted, and so as to effectively reduce the risk that server crashes by load excessive, improves the reliability of system
Property and security, it is to avoid the loss of business datum.
The system that this method is realized has been deployed in business cloud computing environment, and it is intensive to be applied to typical extensive example
Type workflow application --- SMS call charge service, and obtain good result.The application can be produced largely in a short time
Charging workflow instance, the system realized with this method can effectively realize equilibrium treatment, while reducing substantial amounts of soft
Part and hardware investment cost.
Brief description of the drawings
Fig. 1 is present system structure chart
Specific embodiment
Cloud Workflow Management System is with the programming such as Java, HTML, JavaScript, Java Server Pages, XML
Technical research, with MySQL database data storage, with Apache Tomcat as Workflow enactment service container.In this base
On plinth, cloud workflow guard system has also used platform based on multiple frameworks based on Java：
1st, cloud workflow clients component：Client component includes basic module and with component, uses Eclipse
Rich Platform (RCP) card cage is developed.RCP is the card cage for meeting OSGi standards, and that is developed under the framework appoints
What software is all a standard plug-in unit, and these plug-in units are desirably integrated into a software by the configuration file plugin.xml of standard
In.Therefore each Functional Design can be turned into cloud workflow clients component the plug-in unit of height cohesion in the design phase, then
It is integrated together by RCP, Function Coupling is reduced to greatest extent, and improve the autgmentability of system.If future increases
Plus New function, as long as being designed to comply with the plug-in unit of OSGi design standards, can all be integrated into cloud workflow clients instrument.
2nd, cloud workflow high in the clouds component：Cloud service component uses the Apache AXIS2 Web service frameworks based on Java
To realize.Apache AXIS2 are a Web service/SOAP/WSDL engines.Can be by each cloud service group using Axis2
Part is designed as a Web service, is communicated with client component by soap protocol, realizes RMI.Adjusted in method
In, for the data object of transfer complex, data object sequence is first turned to binary data stream by sender, is existed in recipient
Receive after binary data stream, carry out unserializing, be then assembled into complex object.The serializing of this binary data stream
The traditional serializing efficiency of transmission several times high of transfer ratio.
3rd, deployment architecture of the high in the clouds component in cloud environment：Cloud workflow can be deployed in multiple business or cloud environment of increasing income
In, such as Amazon cloud (Amazon Web Services), A Liyun, Eucalyptus cloud, OpenStack clouds etc..Cloud workflow
Each cloud service component of management system is deployed in an independent virtual machine server, can with the height for ensureing system
By property.Server installation Linux server operating system, such as CentOS, Ubuntu, RedHat, install on the server
Apache Tomcat provide middleware services, and open 80 and 8099 ports, and 80 ports are used to provide based on http protocol
Web access, 8099 ports are used for internal system data transfer, and internal system is transmitted through to set up and passed between Java Socket, system
Defeated message comes description content, including message header and message body using XML format, and message header is by message id, message name, message
Type and timestamp are constituted, and message body is the content of message.Be provided with each virtual server cloud computing environment based on
The API kits of Java language to support that serviced component is accessed, while install Spring MVC frameworks with support method inject and
Database access.
4th, cloud workflow resource storehouse：Resources bank is used to store cloud Work stream data, and the system that this method is implemented is in MySQL
Resources bank is set up, MySQL is arranged in the data Web service under cloud computing environment, and RDS is such as may be alternatively mounted on Amazon
On, in may be alternatively mounted at Ali's database service in Ali's cloud.(Build-Time) resources bank when resources bank is divided into construction
(Run-Time) resources bank during with operation, each cloud service component on Spring MVC frameworks by setting up based on JDBC
Database connection pool access resources bank.
5th, load balancing service component：The deployment of components in virtual machine server under an independent cloud environment, with
HAProxy is core, and the operation requests with customer in response end component are received by 80 ports.Set up in service one it is independent
Java continues the thread of uninterrupted execution, the interface API of HAProxy is accessed, to intercept each client component operation requests
Details, and the load condition of each Workflow enactment service is obtained from Warning Service by message, forward the request to bear
Carry minimum execution service.Cloud service component has processed operation requests, and result responds to visitor by load balancing service
Family end component.
6th, Workflow enactment service component：The component is the independent Web clothes being deployed on Apache Tomcat
Business.Building component multiple workflow engine simultaneously performs workflow reality using the built-in thread pool traffic control stream engine schedulings of Java
Example.After workflow engine is created, calculate execution workflow instance needed for resource (CPU, internal memory, bandwidth, I/O, thread pool,
Connection pool) quantity, possible execution route most long and shortest path, the average performance times of task and the time is always performed, so
Enter afterwards in waiting list and wait scheduling to perform, if thread pool is free idle thread, performs service and calculate current all moneys first
Source (CPU, internal memory, bandwidth, I/O, thread pool, connection pool), then scheduling takes that resource is most, total execution time most short waits to hold
Row example is performed；If no trunk journey, engine then waits scheduling always in pending queue.In engine implementation procedure, such as
Fruit runs into manual tasks, exception, hangs up the pause of outside cause requirement engine, and engine then exits thread, reenters waiting list.
Engine is finished, and Workflow enactment service then withdraws all resources for distributing to the engine, closes engine, and thread is relay
Enter thread pool.To support that automatic telescopic, Workflow enactment service component are cloned component and created by calling cloud environment API kits
One or more different systems configuration Workflow enactment service cloned template, clone component can be created with these templates (gram
It is grand) go out new Workflow enactment service component addition system.
7th, Warning Service component：The component is an independent Web service being deployed on Apache Tomcat, internal
A Java thread for uninterrupted operation is set up, is obtained by system internal message and is performed resource utilization in serviced component, such as
CPU, internal memory, bandwidth, I/O, thread pool and connection pool, and calculate each the system synthesis index for performing serviced component, Ran Houji
Calculate it is all perform the system mode composite indexes of service so that calculate and predict it is following one or more when etching system load shape
State.If idle or overload occurs in system, message informing automatic telescopic service-creation will be sent or Workflow enactment service is closed
Component.
8th, automatic telescopic serviced component：The component is an independent Web service being deployed on Apache Tomcat,
A Java thread for uninterrupted operation is set up in inside, after being connected to the message that Warning Service is sent, parses message to determine to create
The new or existing Workflow enactment service component of closing.If request creates New Parent, automatic telescopic service hair message
Give Workflow enactment service component clone's service-creation new Workflow enactment service component；If request closes existing group
Part, automatic telescopic serviced component will obtain vacant working stream and perform service component information by message, call cloud computing environment
API kits close respective free service.
9th, Workflow enactment service clone service：The component is one and is deployed to Web clothes independent on Apache Tomcat
A Java thread for uninterrupted operation is set up in business, inside, receives the message that automatic telescopic service is sent, and obtaining needs what is created
Workflow enactment service component count, system resource configuration needs information, call the API kits of cloud computing environment to inquire about and meet
The Workflow enactment service cloned template of demand creates new Workflow enactment service component.
10th, billing of services component：The component is equally one and is deployed to Web service independent on Apache Tomcat, interior
Portion sets up a Java thread for uninterrupted operation, all working stream was sent messages in the way of poll every 3 seconds and performs clothes
Business component, to obtain past 3 seconds is starting, workflow instance quantity that is being carrying out and having terminated and these realities
Then these examples are carried out charging by the system asset information shared by example with charging regulation.The component is periodically automatically generated
Excel billing statistics forms, the form is sent to the E-mail address that system is specified in the way of Email.
Above is the basic implementation and the course of work of cloud workflow.The cloud workflow that the present invention is realized and other works
Making Workflow Management System mainly has 3 points of differences.First, the system supports the stretch mode of real-time full automation, without
Manual intervention；Second, the system is not the cloud workflow that simply Workflow Management System is transplanted or is deployed under cloud environment
Management system, but make full use of the brand-new cloud Workflow Management System of cloud computing technology；3rd, the load of the system is equal
Weighing apparatus, early warning, automatic telescopic, Workflow enactment service clone, billing function be system a part, in sensory perceptual system shape
There is stronger real-time and sensitiveness, in extensive example intensive applications are processed, the system can be reliable in time in state
Ground treatment, and other Workflow Management Systems have then mainly used the corresponding function that cloud computing environment is provided, and can only passively wait
Treat that cloud computing environment carrys out sensory perceptual system state, so as to reduce real-time and sensitiveness.
Claims (2)
1. the cloud Workflow Management System of the extensive example intensive applications of a kind of support based on client-high in the clouds pattern, its
It is characterized in realize that a cloud Workflow Management System supports extensive example intensive applications, its composition group under cloud computing environment
Part includes the basic module of cloud Workflow Management System and with component；Basic module includes basic tool and basic service, base
This component includes：
(1), flow definition instrument, it is characterised in that the business demand object definition work process flow model according to user, including
Global variable, the outside API of access or service is defeated inside definitim flow structure (order, selection, parallel, loop structure), flow
Enter output parameter and wait the time limit, perform abnormality processing rule, the startup time in Workflow enactment service, startup quantity and
End time etc.；
(2), monitoring tools, it is characterised in that energy real-time searching, monitoring, tracking all working stream in cloud workflow perform service
In the workflow instance that is currently running；
(3), do list, it is characterised in that be the interactive tool of cloud workflow execution person participation execution workflow；
Basic service includes：
Workflow enactment service, it is characterised in that comprising one or more Workflow execution engines, dispatches and controls each engine
Startup, initialization, execution, pause, abnormal end, one work process flow example of end, the step of engine control workflow instance one
Terminated task is gone to one step by initial task；One or more Workflow enactment services are included in cloud workflow, these clothes
The demand for being engaged in being serviced according to automatic telescopic by Workflow enactment service clone service is created；Automatic telescopic service can also basis
System requirements close (release) Workflow enactment service；
Cloud workflow includes, with instrument and service, including with instrument with component：
(1), with service definition instrument, it is characterised in that for high in the clouds provides definition instrument with service, design is with service
System resource configuration, definition are with the regular and tactful of execution, definition in service with the data template and system mould in service
Plate；
(2), with service monitoring instrument, it is characterised in that monitoring high in the clouds, with the working condition for servicing, is manual intervention or control
System provides instrument with service execution；
Include with service：
(1), load balancing service, it is characterised in that it is the entrance of cloud service in cloud workflow, all from client work
Have the operation requests of (basic tool and adjoint instrument) and return to the corresponding of client and serviced by this；
(2), Warning Service, it is characterised in that the system resource being responsible in comprehensive assessment Workflow enactment service is used, and is being
Early warning is sent when system free time or overload condition；
(3), automatic telescopic service, it is characterised in that service-creation is cloned by Workflow enactment service component and goes out more new clouds
Workflow enactment service processes operation requests；It can close (release) one or more idle Workflow enactment services, with
Save system resource；
(4), Workflow enactment service component clone service, it is characterised in that be responsible for receiving the establishment work that automatic telescopic service is sent
Make the request that stream performs serviced component, be created that cloud Workflow enactment service component is added in system according to request；
(5), billing of services, it is characterised in that charging regulation or scheme according to cloud workflow enter to the workflow instance in system
Row statistics and charging.
2. the basic module of cloud workflow according to claim 1 and with component, its collaborative work principle, feature exists
In：
Process Definition Tool prepares to hold according to business demand modeling work stream flow, in mode to Workflow enactment service
OK；The operation of monitoring tools monitor in real time each component of cloud workflow, can send early warning to any exception of system；
Client sends operation requests to cloud service, and load balancing service is connected to request first, will be asked according to request content
It is forwarded to corresponding service and goes treatment；If inoperative stream example operation is asked, corresponding service processing is sent to；If
Workflow instance operation requests, the service needs first to inquire about the work for knowing each Workflow enactment service component from Warning Service
Make state or loading level, then forward requests to be processed in the Workflow enactment service of minimum load；
Workflow enactment service is responsible for performing workflow execution and is processed and processes workflow instance operation requests, and request has been processed
Finish, result is sent to load balancing service, by the service response to client；
Workflow enactment service information in Warning Service acquisition system, monitors Workflow enactment service state and calculates total system shape
State, the following conversion trend of real-time estimate cloud Workflow system state；If monitoring that system future will appear from free time, pre- police uniform
Business will send idle early warning information and notify that automatic telescopic service, automatic telescopic service are closed according to idle early warning information and discharge sky
Not busy Workflow enactment service；If monitoring that system future will appear from excess load, the service will send overload early warning information to
Automatic telescopic is serviced, and automatic telescopic service calculates extension demand according to overload early warning information, and sends extension message to workflow
Perform the new Workflow enactment service of serviced component clone's service-creation and add system；
All working stream performs the workflow instance quantity in service in billing of services statistical system, calculates spent by each example
System resource and generation expense.
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