【摘要】：Software-as-a-service(軟件即服務)是云服務的一種,通過互聯(lián)網(wǎng)向企業(yè)和提供云應用的服務。SaaS服務商將軟件部署在自己的服務器上,通過租賃的方式給租戶提供應用服務。租戶用戶通過web門戶訪問自己租賃的軟件應用。這種模式降低了服務提供商的運營成本,也為中小型企業(yè)減少了購買、構建和維護基礎設施和應用程序的費用。 在SaaS服務提供商提供的應用服務中,工作流也是軟件應用服務的一部分。在多租戶環(huán)境下,對于同一工作流,租戶的需求不同時,出現(xiàn)許多問題：對于同一個流程,不同租戶有不同的要求,并且每個租戶對同一個流程的需求往往不是一成不變的。解決這個問題的辦法是給租戶提供流程定制服務,租戶根據(jù)自己的需求隨時對租賃應用中的工作流進行定制,以滿足自身的需求。 在工作流定制過程中,ISV給每個流程提供了一個模板,每個租戶對流程進行定制,得到多個不同的版本。每個租戶的定制各不相同,并且每個租戶使用自己的定制的流程版本。為了保證系統(tǒng)中不同租戶流程的順利運行,需要對不同租戶定制產(chǎn)生的流程版本進行管理。在保證業(yè)務系統(tǒng)中租戶的流程順利運行的同時保留租戶的定制歷史版本,既方便了租戶數(shù)據(jù)的隨時恢復,又保留歷史數(shù)據(jù)以反映租戶需求。 當租戶的定制信息足夠多時,ISV可以根據(jù)租戶定制的信息來演化模板文件,使得模板文件的接受度更高。流程演化的目標是租戶在使用流程時,對于流程模板的定制操作更少。演化通過租戶定制數(shù)據(jù)反映出的租戶需求對模板進行重構以使得模板更符合整體租戶的需求。 本文的主要工作如下： 1.提出了一個流程定制架構,并提出了一個可定制的工作流數(shù)據(jù)模型�；诹鞒虜�(shù)據(jù)模型的定制過程來滿足用戶的個性化需求,實現(xiàn)業(yè)務與流程,流程與資源的松耦合。降低SaaS運行成本并且提高租戶配置和使用SaaS應用中工作流的靈活性。 2.基于流程定制架構,提出了一個對多租戶流程版本的管理模型。使用一種新型的流程版本管理方法,對所有租戶由定制產(chǎn)生的流程模板進行管理,對所有租戶的流程數(shù)據(jù)的當前版本和歷史版本進行統(tǒng)一收錄,并保證每一個租戶流程的正常運行 3.提出了一種流程模板的演化方法。根據(jù)租戶的定制數(shù)據(jù),對流程的模板進行演化操作,使得模板文件的接受度更高,用戶對流程模板的定制操作更少。
[Abstract]:Software-as-a-service (Software as a Service) is a kind of cloud service. It deploys the software on its own server through the Internet to the enterprise and provides the cloud application service. It provides the application service to the tenant through the way of lease. Tenant users access their leased software applications through the web portal. This model reduces the operating costs of service providers and reduces the cost of buying, building and maintaining infrastructure and applications for small and medium-sized enterprises. Workflow is also a part of software application services provided by SaaS service providers. In the multi-tenant environment, for the same workflow, there are many problems: for the same process, different tenants have different requirements, and each tenant's demand for the same process is often not fixed. The solution to this problem is to provide a process customization service to the tenants, and the tenants can customize the workflow in the lease application at any time according to their own needs to meet their own needs. In the process of workflow customization, ISV provides a template for each process, and each tenant customizes the process and obtains several different versions. Each tenant's customization varies, and each tenant uses its own customized version of the process. In order to ensure the smooth operation of different tenant processes in the system, it is necessary to manage the process versions produced by different tenants. While ensuring the smooth operation of the tenant process in the business system, the custom historical version of the tenant is retained, which not only facilitates the recovery of the tenant data at any time, but also preserves the historical data to reflect the tenant's demand. When the tenant's customization information is enough, ISV can evolve the template file according to the tenant's customized information, so that the acceptance of the template file is higher. The goal of process evolution is that tenants have less customization of process templates when using processes. Evolution reconstructs the template through the tenant requirements reflected by the tenant customization data to make the template more consistent with the needs of the overall tenant. The main work of this paper is as follows: 1. A process customization architecture and a customizable workflow data model are proposed. The customization process based on process data model can meet the individual needs of users and realize the loose coupling of business and process and resources. Reduce SaaS running costs and increase flexibility in tenant configuration and workflow usage in SaaS applications. 2. Based on the framework of process customization, a management model of multi-tenant process version is proposed. A new process version management method is used to manage the process template generated by customization for all tenants, and the current version and historical version of the process data of all tenants are included in a unified way. And ensure that each tenant process normal operation 3. An evolutionary method of process template is proposed. According to the custom data of the tenants, the template of the process is evolved, which makes the acceptance of the template file higher and the customization of the process template less.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.09

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本文編號：2165989