J2ee antipatterns pdf download

Dupire, B. Pricing with a Smile. Risk, 7, B. Shop with confidence. Honda […]. This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Privacy Overview This website uses cookies to improve your experience while you navigate through the website. Privacy Overview. In the next I Knot is a set of very low cohesive but tightly coupled services. The availability of these services may be low while their response times become high [14].

Being overloaded, its response time antipattern and provide their classifications. Moreover, its availability may be low due to the traffic. I Data Service corresponds to a service that, with high data cohesion, contains mainly accessor methods, i. A clear understanding of the different types of service It may have a high coupling with the communicating services [3]. This section clarifies I Stovepipe Service has a large number of private or protected methods that primarily what we mean by service antipattern and proposes a first focus on utility functions, i.

A service antipattern carries highly similar notion, but applicable to service-based systems SBSs. A service antipattern is not an erroneous design or implemen- of service antipatterns. Figure 3 shows the classifications of tation, rather it hinders the maintenance and evolution, or even service antipatterns in Web services see Figure 3a and SCA degrades the design and quality of service of SBSs.

We classify service antipatterns based on the two following categories: A. I Chatty Web Service is an antipattern where a high number of operations are required a Classifications of service antipatterns in Web service to complete one abstraction where the operations are typically attribute-level setters or Duplicated Service getters. Due to many interactions required, the overall performance suffers with a high Service Chain response time [3].

I Data Web Service typically contains accessor operations, i. This service usually SOA Architecture deals with very small messages of primitive types and has high data cohesion. Antipatterns Multi Service I Duplicated Web Service corresponds to a set of highly similar Web services where Data Service identical operations with the same names and—or message parameters might exist.

Static Chatty Service Intra-Service I Fine Grained Web Service is a small Web service with few operations implementing Nobody Home only a part of an abstraction and very often requires several coupled Web services to God Component Dynamic complete an abstraction, resulting in higher development complexity [3]. Bloated Service Stovepipe Service I God Object Web Service corresponds to a Web service that contains a large number of very low cohesive operations related to different business abstractions.

This service b Classifications of service antipatterns in SCA may reflect low availability and result in high response time [3]. I Low Cohesive Operations is an antipattern where developers place very low cohesive operations in a single port-type, which may not be semantically related [10]. Figure 3: Classifications of service antipatterns.

I Redundant PortTypes is an antipattern where multiple port-types are duplicated 1 Existential: In this category, service antipatterns are with the similar set of operations dealing with the same messages [12]. Figure 1: Ten antipatterns commonly found in Web services. Service Antipatterns Classifications of other services or components in the system, e. Antipatterns LowParameter Structural Static HighAccessor that require i only static analysis, ii only dynamic analysis, PrimitiveParameter HighCohesion and iii both static and dynamic analyses.

Static DuplicatedCode - Dynamic service antipatterns require dynamic analysis for their detection; and thus only their structural properties can- Inter-Service HighCoupling not help engineers to detect them within the services or Dynamic ContainedService Measurable TransitiveInvocation components in the SCA , i.

We identify two categories, namely inter-service and intra-service, and sub-categorise them as Figure 4: Classifications of service smells. Moreover, service smells can be classified as the measurable, structural, or lexical depending on the types of properties required to be analysed.

Such classification between service smells and service antipatterns. The map in is also performed in the object-oriented OO literature [19]. Figure 5 is useful to prevent misinterpretation by clarifying and Measurable smells are mainly expressed with the measure classifying smells and antipatterns based on their key concepts. Lexical smells are related to the vocabulary or lexicons used to name service To illustrate the Figure 5 with an example, the Multi Ser- interface elements, i.

Moreover, the Bottleneck or 2 among interfaces within a service. Taxonomy of Service Antipatterns mance service smell is the combination of LowAvailability and HighResponse service smells.

Therefore, Multi Service We use the vocabulary of service domain to manually and Bottleneck Service share similar behavioral properties. The map organises and combines service smells and service antipatterns, and their The relationships reported above play an important role related measurable or observable properties using set operators, in the specification and detection of service antipatterns in e.

In the next section, we briefly highlight the specification approach for service antipatterns, which is facilitated by the Figure 5 summarises the classification as a taxonomy in the taxonomy presented above.

It is similar to Pattern Map by Gamma et al. Due to space limit, we only show seven D. This taxonomy describes the structural relationships between To specify service antipatterns, we performed a thorough service smells and service antipatterns and their measurable, domain analysis of antipatterns for Web service and SCA. We structural, and lexical properties ovals in white. It also investigated their definitions and descriptions in the literature describes the structural relationships edges between service [3], [10], [12], [13], [15].

They provide names for the antipatterns that are visual, humorous, and memorable. Using real-world anecdotes, they illustrate key concepts in an engaging manner. This updated edition sheds light on new management and environmental antipattems and includes a new chapter, six updated chapters, and new discussion questions. Topics covered include leadership principles, environmental antipatterns, group patterns, management antipatterns, and team leadership.

Following introductory material on management theory and human behavior, the text catalogs the full range of management, cultural, and environmental antipatterns. It includes thought-provoking exercises that each describe a situation, ask which antipatterns are present, and explain how to refactor the situation.

It provides time-tested advice to help you overcome bad practices through successful interaction with your clients, customers, peers, supervisors, and subordinates. Author : William J.