Automatically Detecting ORM Performance Anti-Patterns on C# Applications Tuba Kaya Master's Thesis 23–09-2015
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Modellgetriebene O/R-Mapper: Überblick Und Vergleich“
Technische Hochschule Köln TH Köln – University of Applied Sciences Campus Gummersbach Fakultät für Informatik und Ingenieurwissenschaften Fachhochschule Dortmund University of Applied Sciences and Arts Fachbereich Informatik Verbundstudiengang Wirtschaftsinformatik Abschlussarbeit zur Erlangung des Bachelorgrades Bachelor of Science in der Fachrichtung Informatik „Modellgetriebene O/R-Mapper: Überblick und Vergleich“ Erstprüfer: Prof. Dr. Heide Faeskorn-Woyke Zweitprüfer: Prof. Dr. Birgit Bertelsmeier vorgelegt am: 20.06.2016 von cand. Christian Herrmann aus Bollinghausen 3 42929 Wermelskirchen Tel.: 02196/8822737 Email: [email protected] Matr.-Nr.: 11082914 2 Inhaltsverzeichnis Abbildungsverzeichnis .................................................................................................. 5 Tabellenverzeichnis ...................................................................................................... 6 Abkürzungs- u. Symbolverzeichnis ............................................................................... 7 1 Das Besondere an modellgetriebenen O/R-Mappern ........................................... 9 2 Modellgetriebener Ansatz und O/R-Mapper im Licht wissenschaftlicher Erkenntnisse .................................................................................................. 11 2.1 Modellgetriebene Softwareentwicklung und der Wunsch nach Automatisierung in der Softwareentwicklung ............................................................................... 11 2.1.1 Model Driven Software Development -
De La Torre C. Et
y i EDITION v2.01 DOWNLOAD available at: https://aka.ms/microservicesebook PUBLISHED BY Microsoft Developer Division, .NET and Visual Studio product teams A division of Microsoft Corporation One Microsoft Way Redmond, Washington 98052-6399 Copyright © 2017 by Microsoft Corporation All rights reserved. No part of the contents of this book may be reproduced or transmitted in any form or by any means without the written permission of the publisher. This book is provided “as-is” and expresses the author’s views and opinions. The views, opinions and information expressed in this book, including URL and other Internet website references, may change without notice. Some examples depicted herein are provided for illustration only and are fictitious. No real association or connection is intended or should be inferred. Microsoft and the trademarks listed at http://www.microsoft.com on the “Trademarks” webpage are trademarks of the Microsoft group of companies. Mac and macOS are trademarks of Apple Inc. The Docker whale logo is a registered trademark of Docker, Inc. Used by permission. All other marks and logos are property of their respective owners. Co-Authors: Editors: Cesar de la Torre, Sr. PM, .NET product team, Microsoft Corp. Mike Pope Bill Wagner, Sr. Content Developer, C+E, Microsoft Corp. Steve Hoag Mike Rousos, Principal Software Engineer, DevDiv CAT team, Microsoft Participants and reviewers: Jeffrey Ritcher, Partner Software Eng, Azure team, Microsoft Dylan Reisenberger, Architect and Dev Lead at Polly Jimmy Bogard, Chief Architect at Headspring Steve Smith, Software Craftsman & Trainer at ASPSmith Ltd. Udi Dahan, Founder & CEO, Particular Software Ian Cooper, Coding Architect at Brighter Jimmy Nilsson, Co-founder and CEO of Factor10 Unai Zorrilla, Architect and Dev Lead at Plain Concepts Glenn Condron, Sr. -
Experimental Algorithmics from Algorithm Desig
Lecture Notes in Computer Science 2547 Edited by G. Goos, J. Hartmanis, and J. van Leeuwen 3 Berlin Heidelberg New York Barcelona Hong Kong London Milan Paris Tokyo Rudolf Fleischer Bernard Moret Erik Meineche Schmidt (Eds.) Experimental Algorithmics From Algorithm Design to Robust and Efficient Software 13 Volume Editors Rudolf Fleischer Hong Kong University of Science and Technology Department of Computer Science Clear Water Bay, Kowloon, Hong Kong E-mail: [email protected] Bernard Moret University of New Mexico, Department of Computer Science Farris Engineering Bldg, Albuquerque, NM 87131-1386, USA E-mail: [email protected] Erik Meineche Schmidt University of Aarhus, Department of Computer Science Bld. 540, Ny Munkegade, 8000 Aarhus C, Denmark E-mail: [email protected] Cataloging-in-Publication Data applied for A catalog record for this book is available from the Library of Congress. Bibliographic information published by Die Deutsche Bibliothek Die Deutsche Bibliothek lists this publication in the Deutsche Nationalbibliografie; detailed bibliographic data is available in the Internet at <http://dnb.ddb.de> CR Subject Classification (1998): F.2.1-2, E.1, G.1-2 ISSN 0302-9743 ISBN 3-540-00346-0 Springer-Verlag Berlin Heidelberg New York This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer-Verlag. -
NET Technology Guide for Business Applications // 1
.NET Technology Guide for Business Applications Professional Cesar de la Torre David Carmona Visit us today at microsoftpressstore.com • Hundreds of titles available – Books, eBooks, and online resources from industry experts • Free U.S. shipping • eBooks in multiple formats – Read on your computer, tablet, mobile device, or e-reader • Print & eBook Best Value Packs • eBook Deal of the Week – Save up to 60% on featured titles • Newsletter and special offers – Be the first to hear about new releases, specials, and more • Register your book – Get additional benefits Hear about it first. Get the latest news from Microsoft Press sent to your inbox. • New and upcoming books • Special offers • Free eBooks • How-to articles Sign up today at MicrosoftPressStore.com/Newsletters Wait, there’s more... Find more great content and resources in the Microsoft Press Guided Tours app. The Microsoft Press Guided Tours app provides insightful tours by Microsoft Press authors of new and evolving Microsoft technologies. • Share text, code, illustrations, videos, and links with peers and friends • Create and manage highlights and notes • View resources and download code samples • Tag resources as favorites or to read later • Watch explanatory videos • Copy complete code listings and scripts Download from Windows Store Free ebooks From technical overviews to drilldowns on special topics, get free ebooks from Microsoft Press at: www.microsoftvirtualacademy.com/ebooks Download your free ebooks in PDF, EPUB, and/or Mobi for Kindle formats. Look for other great resources at Microsoft Virtual Academy, where you can learn new skills and help advance your career with free Microsoft training delivered by experts. -
An Approach to Maintainable Model Transformations with an Internal DSL
An approach to maintainable model transformations with an internal DSL Master thesis of Georg Hinkel At the Department of Informatics Institute for Program Structures and Data Organization (IPD) Reviewer: Prof. Dr. Ralf Reussner Second reviewer: Prof. Dr. Walther Tichy Advisor: Dr. Lucia Happe Second advisor: Dr. Thomas Goldschmidt Duration:: 1st May 2013 – 31th October 2013 KIT – University of the State of Baden-Wuerttemberg and National Research Center of the Helmholtz Association www.kit.edu I declare that I have developed and written the enclosed thesis completely by myself, and have not used sources or means without declaration in the text. PLACE, DATE ......................................... (Georg Hinkel) iii Abstract In recent years, model-driven software development (MDSD) has gained popularity among both industry and academia. MDSD aims to generate traditional software artifacts from models. This generation process is realized in multiple steps. Thus, before being transformed to software artifacts, models are transformed into models of other metamodels. Such model transformation is supported by dedicated model transformation languages. In many cases, these are entirely new languages (external domain-specific languages, DSLs) for a more clear and concise represen- tation of abstractions. On the other hand, the tool support is rather poor and the transformation developers hardly know the transformation language. A possible solution for this problem is to extend the programming lan- guage typically used by developers (mostly Java or C#) with the re- quired abstractions. This can be achieved with an internal DSL. Thus, concepts of the host language can easily be reused while still creating the necessary abstractions to ease development of model transformations. -
ADPLUS, 307–308 Aggregate Method, 260 ASP.NET MVC Index View, 180 in .NET 4.0 APM, 183 Asynccontroller, 181 EAP, 181 Indexasyn
Index A page lifecycle, 166 synchronous WebForms implementation, 167 ADPLUS, 307–308 Async and await keywords Aggregate method, 260 asynchronous web page word count, 137 ASP.NET MVC CalculateMeaningOfLifeAsync method, 135 Index View, 180 catch block, 136 in .NET 4.0 coercing result, 135 APM, 183 keyword performance, 136 AsyncController, 181 mechanics EAP, 181 awaiter implementation, 146 IndexAsync implementation, 182 GetAwaiter method, 146 IndexCompleted method INotifyCompletion interface, 146 implementation, 182 TickTockAsync method, 145, 147 Multiple Async I/O Operations, 183 reserved word language, 135 in .NET 4.5, 184 return type method, 135 Synchronous Controller, 179 SynchronizationContext, 137 ASP.NET Web API synchronous structure, 134 in .NET 4.0, 186 synchronous web page word count, 136 in .NET 4.5, 187 task delay Synchronous, 185 synchronous back off and retry, 140 ASP.NET WebForms thread efficient back off and retry, 140 AuthorRepository implementation, 167 task effects, 137 GetAuthors method, 167 Task.WhenAll in .NET 4.0 downloading documents one by one, 141 Begin method implementation, 171 download many documents Complex Async Page, 174 asynchronous, 141 End method implementation, 172 error handling, 142 error handling, 175 Task.WhenAny IAsyncResult, 172 task code, 143 lifecycle, 170 UI updation, 143 marking, 170 winning task, 143 registering, 171 UI event handler, 133 in .NET 4.5 UI responsive goal, 134 async and await, 178 UI thread RegisterAsyncTask method, 177 API ways, 139 Task.WhenAll, 178 asynchronously loading web -
Bowling Game Kata .NET
6 Design Patterns to Improve Your Web Apps Steve Smith (@ardalis) [email protected] Ardalis.com Podcast: WeeklyDevTips.com Design Patterns http://flic.kr/p/8XgqKu Stages of Learning Stage Zero - Ignorance Stage One - Awakening Stage Two - Overzealous Stage Three – Mastery http://flic.kr/p/6StgW5 Language http://flic.kr/p/6UpMt9 Design Patterns Iterator Unit of Work Composite Specification Most Useful (for web app design) .(Singleton) .Strategy .Repository .Proxy / Decorator .Command .Builder .Null Object Singleton: Intent .Ensure a class has only one instance .Make the class itself responsible for keeping track of its sole instance .“There can be only one” Singleton Structure (not thread-safe) Singleton Structure (thread-safe and fast) Source: http://csharpindepth.com/Articles/General/Singleton.aspx Singleton Consequences . The default implementation is not thread-safe Avoid in multi-threaded environments Avoid in web server scenarios (e.g. ASP.NET) . Introduce tight coupling among collaborating classes Some commercial tools can be used to mock and . Singletons are notoriously difficult to test test Singletons Commonly regarded as an anti-pattern But why would you intentionally write code you can only test with certain premium tools? Singleton Consequences .Violate the Single Responsibility Principle Class is responsible for managing its instances as well as whatever it does .Using an IOC Container it is straightforward to avoid the coupling and testability issues Managing Object Lifetime Using an IOC Container (StructureMap) Object Lifetime in ASP.NET Core public void ConfigureServices(IServiceCollection services) { services.AddMvc(); // you don’t need to implement singleton behavior in class! services.AddSingleton<ISomeService>(); } Singleton behavior is fine and often desirable. -
Introduction to Microservices Architecture Training
Specialized - Introduction to Microservices Architecture Training Code: WA2755 Length: 2 days URL: View Online This training course will help the attendees understand the value proposition and technical aspects of microservices. You will learn about the pros and cons of breaking up the monolithic type of applications prevalent in the enterprise space and converting them into microservices-based solutions. Detailed analysis of some of the common patterns and motivation for using them in microservices architecture is also provided. Who Can Benefit IT Architects, Software Designers, Developers. Prerequisites Foundational knowledge of programming and software design principles. Course Details Outline of Introduction to Microservices Architecture Training Chapter 1. Breaking Up Monoliths – Pros and Cons Traditional Monolithic Applications and Their Place Disadvantages of Monoliths Developer's Woes Architecture Modernization Architecture Modernization Challenges Microservices Architecture is Not a Silver Bullet! What May Help? In-Class Discussion Summary Chapter 2. Microservices What is a "Microservice"? Unix Analogy Principles of Microservices Services within an SOA vs Microservices Properties and Attributes of Microservices Benefits of Using Microservices The Two-Pizza Teams Beware of Microservices Cons Anti-Pattern: Nanoservices The Twelve-Factor App Methodology The Select Factors Serverless Computing Microservices – Operational Aspects Summary Chapter 3. Microservices Architecture Defined The Microservices Architecture SOA Promises and Expectations Microservices Architecture vs SOA The ESB Connection Microservices Architecture Benefits Microservices Architecture Choices and Attributes Example: On-Line Banking Solution Based on MsA Distributed Computing Challenges Replaceable Component Architecture The Actor Model MapReduce Distributed Computing Framework Hadoop's MapReduce Word Count Job Example What Can Make a Microservices Architecture Brittle? 4+1 Architectural View Model Summary Chapter 4. -
Nhibernate Reference Documentation
NHibernate Reference Documentation Version: 5.0 Table of Contents Preface ..........................................................................................................................................viii 1. Quick-start with IIS and Microsoft SQL Server ..........................................................................1 1.1. Getting started with NHibernate .......................................................................................... 1 1.2. First persistent class ........................................................................................................... 2 1.3. Mapping the cat ................................................................................................................. 2 1.4. Playing with cats ................................................................................................................ 3 1.5. Finally ...............................................................................................................................6 2. Architecture ................................................................................................................................7 2.1. Overview ...........................................................................................................................7 2.2. Instance states .................................................................................................................... 9 2.3. Contextual Sessions ......................................................................................................... -
Objektovo-Relačné Mapovanie a Jeho Použitie Na Platforme .NET
MASARYKOVA UNIVERZITA FAKULTA INFORMATIKY Objektovo-relačné mapovanie a jeho použitie na platforme .NET DIPLOMOVÁ PRÁCA Tomáš Stach Brno, 2013 i Prehlásenie Prehlasujem, že táto diplomová práca je mojím autorským dielom, ktoré som vypracoval samostatne. Všetky zdroje, pramene a literatúru, ktoré som pri vypracovaní používal alebo z nich čerpal, v práci riadne citujem s uvedením úplného odkazu na príslušný zdroj. Vedúci práce : RNDr. David Sehnal ii Poďakovanie Rád by som poďakoval vedúcemu práce RNDr. Davidovi Sehnalovi za jeho podporu a cenné pripomienky a svojim nadriadeným v zamestnaní za zhovievavosť. Poďakovanie si zaslúži aj moja rodina a priateľka za obrovskú dávku trpezlivosti. iii Zhrnutie Cieľom tejto práce je zoznámiť čitateľa s objektovo-relačným mapovaním na platforme .NET. Po predstavení relačného a objektového modelovania nasleduje popis problematiky objektovo-relačného mapovania, jeho výhodami, nevýhodami a rozdielmi jeho použitia v programoch voči klasickému dopytovaniu pomocou SQL, resp. využitiu inej ako relačnej databázy. Následne sú niektoré konkrétne najčastejšie používané nástroje predstavené detailne a je porovnaný ich výkon v niekoľkých testoch. Súčasťou práce je testovacia aplikácia, ktorá bola použitá pri porovnávaní a testovaní výkonu jednotlivých nástrojov. iv Kľúčové slová Relačná databáza, NoSQL databáza, objektovo-relačné mapovanie, návrhové vzory, platforma .NET, LINQ, Entity Framework v Obsah Kapitola 1 Úvod 1 1.1 Formulácia práce .................................................................................1 -
A Solution to the Object-Relational Mismatch
Universidade do Minho Escola de Engenharia Miguel Esteves CazDataProvider: A solution to the object-relational mismatch Outubro de 2012 Universidade do Minho Escola de Engenharia Departamento de Informática Miguel Esteves CazDataProvider: A solution to the object-relational mismatch Dissertação de Mestrado Mestrado em Engenharia Informática Trabalho realizado sob orientação de Professor José Creissac Campos Outubro de 2012 To my parents... \Each pattern describes a problem which occurs over and over again in our environment, and then describes the core of the solution to that problem, in such a way that you can use this solution a million times over, without ever doing it the same way twice." Christopher Alexander Abstract Today, most software applications require mechanisms to store information persistently. For decades, Relational Database Management Systems (RDBMSs) have been the most common technology to provide efficient and reliable persistence. Due to the object-relational paradigm mismatch, object oriented applications that store data in relational databases have to deal with Object Relational Mapping (ORM) problems. Since the emerging of new ORM frameworks, there has been an attempt to lure developers for a radical paradigm shift. However, they still often have troubles finding the best persistence mechanism for their applications, especially when they have to bear with legacy database systems. The aim of this dissertation is to discuss the persistence problem on object oriented applications and find the best solutions. The main focus lies on the ORM limitations, patterns, technologies and alternatives. The project supporting this dissertation was implemented at Cachapuz under the Project Global Weighting Solutions (GWS). Essentially, the objectives of GWS were centred on finding the optimal persistence layer for CazFramework, mostly providing database interoperability with close-to-Structured Query Language (SQL) querying. -
ASP.NET Core 1.0 Documentation
ASP.NET Core 1.0 Documentation Microsoft 7 06, 2016 Contents 1 Topics 3 1.1 Introduction to ASP.NET Core......................................3 1.2 Getting Started..............................................7 1.3 Tutorials.................................................9 1.4 Fundamentals............................................... 142 1.5 MVC................................................... 243 1.6 Testing.................................................. 365 1.7 Working with Data............................................ 372 1.8 Client-Side Development........................................ 375 1.9 Mobile.................................................. 478 1.10 Publishing and Deployment....................................... 478 1.11 Guidance for Hosting Providers..................................... 513 1.12 Security.................................................. 523 1.13 Performance............................................... 642 1.14 Migration................................................. 656 1.15 Contribute................................................ 710 2 Related Resources 717 3 Contribute 719 i ii ASP.NET Core 1.0 Documentation, : ASP.NET 5 has been renamed to ASP.NET Core 1.0. Read more. : This documentation is a work in progress. Topics marked with a are placeholders that have not been written yet. You can track the status of these topics through our public documentation issue tracker. Learn how you can contribute on GitHub. Contents 1 ASP.NET Core 1.0 Documentation, 2 Contents CHAPTER 1 Topics 1.1 Introduction