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1、Y10二二978洳≯j_嗜密級(jí):碩士學(xué)位論文⑧指導(dǎo)教師陵查副熬援所在學(xué)院讓簋扭堂隨提交日期2007—5—1l浙江人學(xué)碩士學(xué)位論文摘要隨著對(duì)象關(guān)系映射設(shè)計(jì)思想的深入人心,出現(xiàn)了越來(lái)越多的持久化中間件,并應(yīng)用于企業(yè)系統(tǒng)設(shè)計(jì)中。例如:非商業(yè)的Hibernate、商業(yè)的Toplink等。而過(guò)程控制、實(shí)時(shí)數(shù)據(jù)處理等現(xiàn)代應(yīng)用則要求與企業(yè)信息進(jìn)行更緊密的結(jié)合。比如,環(huán)保監(jiān)控行業(yè)。本文主要敘述了對(duì)象持久化中間件TORM和實(shí)時(shí)數(shù)據(jù)RTDB組織與管理技術(shù)。對(duì)象關(guān)系型實(shí)時(shí)數(shù)據(jù)中間層是基于插件運(yùn)行框架而開(kāi)發(fā)的一個(gè)分布式系統(tǒng),整個(gè)系統(tǒng)體系結(jié)構(gòu)采用典型的C/S架構(gòu),高負(fù)荷的同時(shí)為
2、多個(gè)客戶端服務(wù),在服務(wù)和客戶端都提供了對(duì)象緩沖區(qū),同時(shí)自動(dòng)維護(hù)對(duì)象的完整性。文章全面分析了對(duì)象持久化組件和實(shí)時(shí)數(shù)據(jù)中間層的研究現(xiàn)狀,技術(shù)背景和發(fā)展方向;然后,提出了對(duì)象持久化組件和實(shí)時(shí)數(shù)據(jù)中間層設(shè)計(jì)與實(shí)現(xiàn)方案,為企業(yè)應(yīng)用設(shè)計(jì)提供了底層支持。在此基礎(chǔ)上,介紹了對(duì)象持久化組件的域模型關(guān)聯(lián)、繼承特性到數(shù)據(jù)模型轉(zhuǎn)換,c#數(shù)據(jù)類型到數(shù)據(jù)庫(kù)類型映射等關(guān)鍵技術(shù)。同時(shí)還介紹了實(shí)時(shí)數(shù)據(jù)中間層的實(shí)時(shí)數(shù)據(jù)緩存結(jié)構(gòu),實(shí)時(shí)數(shù)據(jù)組織形式等關(guān)鍵技術(shù)。針對(duì)系統(tǒng)的特點(diǎn)和實(shí)時(shí)應(yīng)用的需要,本文還給出了數(shù)據(jù)緩沖、并發(fā)控制、回調(diào)機(jī)制和告警中心機(jī)制,并設(shè)計(jì)了相關(guān)的數(shù)據(jù)結(jié)構(gòu)和算法。最后,本文總結(jié)了
3、對(duì)象關(guān)系型實(shí)時(shí)數(shù)據(jù)中間層系統(tǒng)在項(xiàng)目應(yīng)用中的特點(diǎn),并提出了其今后還需要進(jìn)一步改進(jìn)的問(wèn)題和相關(guān)解決思路。關(guān)鍵詞:TORM,RTDB,對(duì)象關(guān)系映射,實(shí)時(shí)數(shù)據(jù)緩沖,告警中心,回調(diào)機(jī)制數(shù)據(jù)實(shí)時(shí)采集浙江大學(xué)碩士學(xué)位論文Abs打actAbstractAsthedevelopmentofObjecVRelationalMapper,merearcmoreandmorepersistencelayers,suchasNhibemate,Toplink,widelyusedinE照However,modernapplicationssuch鵝processcontroll
4、ingandreal—timedataprocessingneedreal—timerequirements.suchasEnvironmentalprotectionindustrv.Thisdissertationisaboutbackground.structuredesignofRealDataLayerintheorganizationofObject/RelationalMapper.ToRMandRTDBisdistributed.networksystem.ByAssoeiatewiththiscoretechnologynamedru
5、nningfrarnework.TORMandRTDBcaneasilybeusedintheenvironmentofdistributednetwork.Asacommonframework,runningfTalneworkprovidesbasicservices,suchasnetworkcommunication,multiple—threadscheduling.Thissystemwithtypicalc/sarchitecturesupponsmulti·clients.Italseprovidesobjectbufferinorde
6、rtomaintaintheintergrityofobjects.ItgiyesoutthewholestructuredesignofTORMandRTDB.Meanwhile.wediscussthedifferencesandrelationsamongmultiplelayersmechanisms,persistencelayerandrealdatalayer.Bycomparisonwiththeformermechanism,multiplelayersmechanismcarriesmoree艏cient.Atthebasisofa
7、nalysisontherealdatasystem.TORMandIHDBimplementthecombinationofpersistencelayerandrealdatalayerbyintroducingthemultiplelayersmechanism.Italsoimplementsbothalarmcenterlayerandfacilitycontrollayerinthecollaborationofcallbackmechanism.Dependingontheanalysisofrealdatacache,wepropose
8、awayofconcurrencecontr01.Finally,theauthorsumma