以Web services实现应用程式整合

以Webservices實現應用程式整合

林純忠Mirage遊戲橘子數位科技股份有限公司技術長遭遇到的問題…OnyxSAPBusinessIntelligencePurchasingSystemSalesServiceMarketingHistoryTriggersFinancialsBillingExecuteInquiryTrends系統是依照個別單位的需要而建立的所謂的系統間整合大多是透過程式勉強連接為什麼要有這堂課?企業有很多的系統複雜的技術在企業內多種通訊協定系統間無法溝通這堂課的目標是…我們希望讓企業內的系統有標準的介面,讓系統間的整合變的容易而且快速整合的方式有資料資料格式或資料庫專屬的連結元件或函式庫應用系統資料或商業物件專屬的連結元件或函式庫服務訊息交換文件交奐標準介面實作面實作面邏輯面邏輯面架構面架構面StandardDataCenterConfigurationsPatterns&ConceptsNetworkofDevicesDeploymentPackages&Policies應用程式開發DataCenter的架設與使用應用系統架構技術架構功能需求營運需求從架構面來看設計樣式原則服務服務狀態訊息邏輯8服務與元件服務非常像是一個元件(物件)但是元件包含實體行程與程式碼服務可以是由元件或一堆函數庫集合而成9訊息服務或軟體間的互動連結將訊息以特定的格式(XML)傳送或接收進來不需特定的技術才能傳送不需特定的平台才能接收10Webservices架構業界標準XML1.0-EncodingXMLSchema-TypingSOAP1.1-PackagingWSDL1.1-DescriptionUDDI–PublishingandDiscovery…今日之所以很多系統無法整合就是因為沒有一致的標準安全可信賴的訊息SOAP訊息轉送整合LegacySystemsPartnerSystemsVerticalsandInfrastructure交易EnterpriseData服務服務為什麼採用Webservices整合Webservicesor.NETRemoting?Remoting無法直接處理XMLSchema無法直接使用到ASP.NETsession機制標準化支援標準XML訊息格式利用System.Xml.Serialization

處理訊息內容XMLSchema服務BusinessDocument介面客戶端伺服器端非同步訊息處理ChecksDuplicateChecksExpirationControlParsingDispatchestoFunctionReadsStreamReturnsHTTP202RequestProcessed202-DeliveryBusinessProcess為什麼要是非同步?交易會執行很久大量訊息高可靠性避開DOS攻擊DOS:DenyofService使用佇列用佇列儲存收到的訊息確保訊息一定會處理實作非同步處理SupplierQueueInvoice

Processor訊息處理模型ServiceDeserializeValidateAuthorize/TrustLogMapQueueDispatchInvoice

ProcessorOrchestration訊息處理基礎架構訊息處理基礎架構訊息處理基礎架構服務服務Serialize加密簽章Deserialize認證稽核紀錄可靠訊息交易事件監督路徑導引授權18文件型態處理服務<SOAPFormatA>HTTP專屬處理服務AdapterBridgeRouterBinaryFormatB19服務交易RollBackCommit0101010011020交易流程ServiceServiceServiceProcessServiceBrowserorConsumerTransaction2WebserviceTransactionTransactionQueryTrans.3Trans.121整合服務時所遭遇的問題WarehouseOrderManagementCRMFinancialsProduction22定義一致的程序BusinessServiceBusinessServiceBusinessServiceBusinessServiceProcessServiceProcessService23找出關鍵元件BusinessServiceBusinessServiceBusinessServiceBusinessServiceProcessServiceProcessServiceBusinessServiceBusinessComponentBusinessComponentBusinessComponentBusinessComponentBusinessProcessBusinessProcess24商業服務的樣式ServiceServiceFaçadeBusinessEntityLayerDataRepresentationLayerDataAccessorsDataAccessorsBusinessEntitiesBusinessEntitiesProcessServiceServiceServiceFaçadeBusinessEntityLayerDataRepresentationLayerDataAccessorsDataAccessorsBusinessEntitiesBusinessEntitiesProcessService商業服務的樣式BusinessServiceBusinessServiceBusinessServiceBusinessServiceProcessServiceProcessServiceServiceFaçadeBusinessEntityLayerDataRepresentationLayerDataAccessorsDataAccessorsBusinessEntitiesBusinessEntitiesProcessService26商業服務的樣式UserInterfaceServiceUserInterfaceServiceUserInterfaceServiceUserInterfaceServiceUserInterfaceProcessServiceUserInterfaceProcessBusinessServiceBusinessServiceBusinessServiceBusinessServiceProcessServiceProcessServiceServiceFaçadeBusinessEntityLayerDataRepresentationLayerDataAccessorsDataAccessorsBusinessEntitiesBusinessEntitiesProcessServiceBusinessServiceBusinessServiceBusinessServiceBusinessServiceProcessServiceProcessServiceServiceFaçadeBusinessEntityLayerDataRepresentationLayerDataAccessorsDataAccessorsBusinessEntitiesBusinessEntitiesProcessService27透過Webservices作整合(0)定義出業務處理流程補貨庫存警示產生訂單送出訂單…找出所有可能參與此流程的系統透過Webservices作整合(1)定義功能面的需求每晚稽核必須產生電子化訂單需要供應商管理必須與其他系統整合定義出營運上的需求安全可靠重複使用透過Webservices作整合(2)利用舊有的系統或資料整合技術既有的資料存取元件…既有的COM+或者程式ApplicationAdaptersDataAdaptersSystemXSystemY透過Webservices作整合(3)將系統中有用到的功能轉成WebservicesPurchasingSystemBuyInquiryApplicationAdapterWebservicePurchasingInterfaceBuySellGetQuoteBuyServicePurchaseOrderMessagingSecurityDiscoveryVendorProfileFunctionalOperational[WebService(Reliable=true,Transaction=Compensate)]publicvoidExecutePurchase(objectmessage){

DecryptMessage(message);

Purchasing.ExecuteBuy(message);}*Thisispseudocode.透過Webservices作整合(3)透過Webservices作整合(4)將Webservices依照不同的業務流程彙整成一個Webservice.彙整成以業務為導向的服務.簡單(shortlived,synchronous)業務流程可以利用Script或元件就完成複雜(longrunning,asynchronous)必須透過較小的WebService才能完成透過Webservices作整合(4)[RegisterForWorkFlow]publicvoidExecutePurchase(objectmessage){

Purchasing.ExecuteBuy(message); //Waitonsync

Billing.ProcessInvoice(message)}*Thisispseudocode.透過Webservices作整合(5)實作共同服務機制(CommonServiceframework)HostingThismayhostyournewbusinessintegrationlayerusedforwebserviceaggregationSupportThismustimplementthemostcommondenominatorofservicesdictatedbythedownstreamwebservices(e.g.reliability,encryption,routing…)ServiceServiceFaçadeBusinessEntityLayerDataRepresentationLayerDataAccessorsDataAccessorsBusinessEntitiesBusinessEntitiesBusinessProcessLayerDemo–IntegrationviaServiceBasedArchitectureAccountingServiceSupplierServiceInvoiceServiceShippingServiceInventoryServiceBusinessServiceServiceFaçadeBusinessEntityLayerDataRepresentationLayerDataAccessorsDataAccessorsBusinessEntitiesBusinessEntitiesBusinessProcessLayer36TheDemoProcessStartManufacturerinventorysystemgeneratesauditBizTalktransformsflat-fileMessagedeliveredtoorchestrationOrchestrationcallspurchasingwebserviceMustbesigned,encryptedPurchasingservicecallssupplierSupplierimplementsroutingtovirtualizeserviceSupplierrouterforwardsmessageforprocessingProcessorcheckssignatureanddecryptsGeneratesandsubmitsinvoicebacktomanufacturerManufacturerreceivesmessageInvokesrunningbusinessprocess,passesinvoicebacktointegrationsystemIntegration/orchestrationcallsaccountingsystemwebserviceMustencryptandsignmessageProcessEndMicrosoft’sIntegrationPlatform.NETFrameworkManagedRuntimeCompleteandwell-factoredapplication