Migration of a Chosen Architectural Pattern to Service Oriented ...

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Chapter 5GuidelinesThis chapter presents elaborated guidelines in order of their application. Theguidelines apply white-box approach (see section 2.1.1 for example white boxapproach). The presented white-box approach defines process which requirescontext identification, service identification and identification of the target architecture.While the target architecture is already identified (see figure 4.4). Thecontext analysis and service identification is possible because the documentationand source code is available. Each guideline is meant to introduce one SOA architecturalpattern into target architecture. The chapter is organized into followingsections:1. Pattern Languages– the section presents motivation behind chose of patternlanguages as a mean of transformation between two architectural. Additionally,the section describes migrated and the target architectures are patternlanguages.2. Guidelines– Guidelines for migration are meant to simplify migration toSOA. The guidelines are implementation of translation between migratedand target pattern language. Order of application of each guideline reflectthe description section of the target pattern language. Each guidelines introducesone SOA pattern (see section 4.6.1 for full list of identified SOApatterns) into architecture. The target architecture (see figure 4.4 for targetarchitecture) is a result of application of all the guidelines. This sectionpresents how guidelines were created and what determines order of theirapplication. Guidelines are described by “How to” section and figure presentingstate before application of the guideline and after the application.3. Project for migration – the section presents briefly a project selected foran example migration along with selection criteria and their application.Migration of the project illustrates how to apply the guidelines.4. Application of the guidelines– the section presents an example applicationof guidelines and technical issues that were identified during migration.5. Discussion– the section presents a discussion about guidelines and the targetarchitecture that is created as result of their application.102
Chapter 5. Guidelines 1035.1 Pattern LanguagesPrevious chapters provide two architectures. First that is the migrated architectureprovided by MVC architectural pattern. The second is the target architecturethat is a result of application of several SOA architectural patterns. The targetarchitecture is in fact a pattern language because [37]:Pattern languages are collections of patterns that can be used to build somethinglarger than any individual pattern can be used to build.Since the target architecture may be expressed as a pattern language, it isworth to use this fact and convert transformation between two architectures intotranslation between two pattern languages.This section presents the MVC architectural pattern and the target architecturedescribed as pattern languages. The description follows template of descriptionof pattern language presented in section 3.3.15.1.1 MVC Pattern LanguageThis section presents MVC architectural pattern (see 3.2.1 for description ) as apattern language.AbstractThis pattern language is dedicated for application interacting with users. Thepattern language simplifies interaction through clear separation of GUI from logicof the system. Application of the pattern language supports maintenance anddevelopment of multiple user interfaces.MapThis pattern language is one element pattern language only. The map of thispattern language is the map of only one node without arcs. The structure of thepattern is presented in figure 3.10DescriptionThe pattern language is one element only. The order of application is reduced tothe only one step.PatternsName Model View Controller
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Chapter 1Introduction1.1 Background
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References 153[22] Frank Buschmann,
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References 155[46] Dirk Krafzig, Ka
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References 157[67] Xiaohong Qiu. Bu
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