Service Design Patterns

Fundamental Design Solutions for SOAP/WSDL and RESTful Web Services

Author: Robert Daigneau

Publisher: Addison-Wesley


Category: Computers

Page: 321

View: 198

A complete practitioner's catalog of proven domain services design solutions that can help any organization leverage SOA's full benefits * *Provides a vocabulary of proven SOA design solutions, with concrete examples and code that is easy for architects to adapt and implement. *By Rob Daigneau, one of the industry's leading experts in complex systems integration. *Helps architects and IT leaders accurately set stakeholder expectations for major SOA initiatives. Service-oriented architectures are typically called upon to deliver two general categories of services: enterprise services and domain services. Enterprise services are essentially composite services that typically leverage technologies such as message-oriented middleware. Domain services are the building blocks these composites depend upon. Each service category is best served by a distinct set of design solutions. This is the first book to systematically identify and explain best practice patterns for domain services. Rob Daigneau expands upon the Service Layer concept (covered expertly by Fowler in Patterns of Enterprise Application Architecture ) domain services can be used with Enterprise Integration Patterns (made famous by Hohpe and Woolf). Daigneau begins by reviewing SOA concepts, illuminating the distinctions between enterprise and domain services, and identifying key relationships between domain services and other pattern groups. Next, he introduces each essential pattern for creating and delivering domain services, providing a vocabulary of design solutions that architects and other IT professionals can implement by referencing and adapting the concrete examples he supplies.

Web Services Foundations

Author: Athman Bouguettaya

Publisher: Springer Science & Business Media


Category: Computers

Page: 739

View: 259

Web services and Service-Oriented Computing (SOC) have become thriving areas of academic research, joint university/industry research projects, and novel IT products on the market. SOC is the computing paradigm that uses Web services as building blocks for the engineering of composite, distributed applications out of the reusable application logic encapsulated by Web services. Web services could be considered the best-known and most standardized technology in use today for distributed computing over the Internet. Web Services Foundations is the first installment of a two-book collection covering the state-of-the-art of both theoretical and practical aspects of Web services and SOC research. This book specifically focuses on the foundations of Web services and SOC and covers - among others - Web service composition, non-functional aspects of Web services, Web service selection and recommendation, and assisted Web service composition. The editors collect advanced topics in the second book of the collection, Advanced Web Services, (Springer, 2013). Both books together comprise approximately 1400 pages and are the result of an enormous community effort that involved more than 100 authors, comprising the world’s leading experts in this field.

Service-Driven Approaches to Architecture and Enterprise Integration

Author: Ramanathan, Raja

Publisher: IGI Global


Category: Computers

Page: 411

View: 783

While business functions such as manufacturing, operations, and marketing often utilize various software applications, they tend to operate without the ability to interact with each other and exchange data. This provides a challenge to gain an enterprise-wide view of a business and to assist real-time decision making. Service-Driven Approaches to Architecture and Enterprise Integration addresses the issues of integrating assorted software applications and systems by using a service driven approach. Supporting the dynamics of business needs, this book highlights the tools, techniques, and governance aspects of design, and implements cost-effective enterprise integration solutions. It is a valuable source of information for software architects, SOA practitioners, and software engineers as well as researchers and students in pursuit of extensible and agile software design.

Service-Oriented Computing

12th International Conference, ICSOC 2014, Paris, France, November 3-6, 2014, Proceedings

Author: Xavier Franch

Publisher: Springer


Category: Computers

Page: 600

View: 993

This book constitutes the refereed conference proceedings of the 12th International Conference on Service-Oriented Computing, ICSOC 2014, held in Paris, France, in November 2014. The 25 full and 26 short papers presented were carefully reviewed and selected from 180 submissions. The papers are organized in topical sections on business process management; service composition and discovery; service design, description and evolution; cloud and business service management; ensuring composition properties; quality of service; semantic web services; service management; cloud service management; business service management; trust; service design and description.

Apache CXF Web Service Development

Develop and Deploy SOAP and RESTful Web Services

Author: Naveen Balani

Publisher: Packt Publishing Ltd


Category: Computers

Page: 336

View: 796

Develop and deploy SOAP and RESTful Web Services.

SOA with Java

Realizing Service-Orientation with Java Technologies

Author: Thomas Erl

Publisher: Prentice Hall


Category: Computers

Page: 300

View: 987

“An outstanding depth-and-breadth resource for IT architects and Java professionals to understand and apply the marriage of SOA and modern Java.” --Antonio Bruno, Enterprise Architecture and Strategy, digitalStrom “A great self-contained book on SOA using flexible Java implementations....” --Roger Stoffers, Hewlett Packard “Provides clarity on abstract concepts and is filled with concrete examples of implementing SOA principles in Java environments.” --Sanjay Singh, Certified SOA Architect “...provides a holistic, comprehensive view on leveraging SOA principles and architecture for building and deploying performant Java services.” --Suzanne D’Souza, KBACE Technologies “Thomas Erl’s series of books on services technology have shaped, influenced, and strengthened a whole community of enterprise and solution architects’ thinking and solution development, and the much awaited SOA with Java book is an excellent addition to the series. It is a must-read.” --Lalatendu Rath, Wipro Technologies The Definitive Guide to Building Service-Oriented Solutions with Lightweight and Mainstream Java Technologies Java has evolved into an exceptional platform for building Web-based enterprise services. In SOA with Java, Thomas Erl and several world-class experts guide you in mastering the principles, best practices, and Java technologies you need to design and deliver high-value services and service-oriented solutions. You’ll learn how to implement SOA with lightweight frameworks, mainstream Java services technologies, and contemporary specifications and standards. To demonstrate real-world examples, the authors present multiple case study scenarios. They further demystify complex concepts with a plain-English writing style. This book will be valuable to all developers, analysts, architects, and other IT professionals who want to design and implement Web-based service-oriented architectures and enterprise solutions with Java technologies. Topic Areas Applying modern service-orientation principles to modern Java technology platforms Leveraging Java infrastructure extensions relevant to service-oriented solutions Exploring key concepts associated with SOA and service-orientation within the context of Java Reviewing relevant Java platforms, technologies, and APIs Understanding the standards and conventions that REST and SOAP services are built upon in relation to Java implementations Building Java Web-based services with JAX-WS and JAX-RS Applying the eight key principles of service-orientation design using Java tools and technologies Creating Java utility services: architectural, design, and implementation issues Constructing effective entity services: service contracts, messages, data access, and processing Constructing task services, including detailed guidance on service composition Using ESBs to support infrastructure requirements in complex services ecosystems

Beginning XML

Author: David Hunter

Publisher: John Wiley and Sons


Category: Computers

Page: 1080

View: 973

When the first edition of this book was written, XML was a relatively new language but already gaining ground fast and becoming more and more widely used in a vast range of applications. By the time of the second edition, XML had already proven itself to be more than a passing fad, and was in fact being used throughout the industry for an incredibly wide range of uses. With the third edition, it was clear that XML was a mature technology, but more important, it became evident that the XML landscape was dividing into several areas of expertise. Now in this edition, we needed to categorize the increasing number of specifications surrounding XML, which either use XML or provide functionality in addition to the XML core specification. So what is XML? It’s a markup language, used to describe the structure of data in meaningful ways. Anywhere that data is input/output, stored, or transmitted from one place to another, is a potential fit for XML’s capabilities. Perhaps the most well-known applications are web-related (especially with the latest developments in handheld web access—for which some of the technology is XML-based). However, there are many other non-web-based applications for which XML is useful—for example, as a replacement for (or to complement) traditional databases, or for the transfer of financial information between businesses. News organizations, along with individuals, have also been using XML to distribute syndicated news stories and blog entries. This book aims to teach you all you need to know about XML—what it is, how it works, what technologies surround it, and how it can best be used in a variety of situations, from simple data transfer to using XML in your web pages. It answers the fundamental questions: * What is XML? * How do you use XML? * How does it work? * What can you use it for, anyway? This book is for people who know that it would be a pretty good idea to learn XML but aren’t 100 percent sure why. You’ve heard the hype but haven’t seen enough substance to figure out what XML is and what it can do. You may be using development tools that try to hide the XML behind user interfaces and scripts, but you want to know what is really happening behind the scenes. You may already be somehow involved in web development and probably even know the basics of HTML, although neither of these qualifications is absolutely necessary for this book. What you don’t need is knowledge of markup languages in general. This book assumes that you’re new to the concept of markup languages, and we have structured it in a way that should make sense to the beginner and yet quickly bring you to XML expert status. The word “Beginning” in the title refers to the style of the book, rather than the reader’s experience level. There are two types of beginner for whom this book is ideal: * Programmers who are already familiar with some web programming or data exchange techniques. Programmers in this category will already understand some of the concepts discussed here, but you will learn how you can incorporate XML technologies to enhance those solutions you currently develop. * Those working in a programming environment but with no substantial knowledge or experience of web development or data exchange applications. In addition to learning how XML technologies can be applied to such applications, you will be introduced to some new concepts to help you understand how such systems work. The subjects covered in this book are arranged to take you from novice to expert in as logical a manner as we could. This Fourth Edition is structured in sections based on various areas of XML expertise. Unless you are already using XML, you should start by reading the introduction to XML in Part I. From there, you can quickly jump into specific areas of expertise, or, if you prefer, you can read through the book in order. Keep in mind that there is quite a lot of overlap in XML, and that some of the sections make use of techniques described elsewhere in the book. * The book begins by explaining what exactly XML is and why the industry felt that a language like this was needed. * After covering the why, the next logical step is the how, so it shows you how to create well-formed XML. * Once you understand the whys and hows of XML, you’ll go on to some more advanced things you can do when creating your XML documents, to make them not only well formed, but valid. (And you’ll learn what “valid” really means.) * After you’re comfortable with XML and have seen it in action, the book unleashes the programmer within and looks at an XML-based programming language that you can use to transform XML documents from one format to another. * Eventually, you will need to store and retrieve XML information from databases. At this point, you will learn not only the state of the art for XML and databases, but also how to query XML information using an SQL-like syntax called XQuery. * XML wouldn’t really be useful unless you could write programs to read the data in XML documents and create new XML documents, so we’ll get back to programming and look at a couple of ways that you can do that. * Understanding how to program and use XML within your own business is one thing, but sending that information to a business partner or publishing it to the Internet is another. You’ll learn about technologies that use XML that enable you to send messages across the Internet, publish information, and discover services that provide information. * Since you have all of this data in XML format, it would be great if you could easily display it to people, and it turns out you can. You’ll see an XML version of HTML called XHTML. You’ll also look at a technology you may already be using in conjunction with HTML documents called CSS. CSS enables you to add visual styles to your XML documents. In addition, you’ll learn how to design stunning graphics and make interactive forms using XML. * Finally, the book ends with a case study, which should help to give you ideas about how XML can be used in real-life situations, and which could be used in your own applications. This book builds on the strengths of the earlier editions, and provides new material to reflect the changes in the XML landscape—notably XQuery, RSS and Atom, and AJAX. Updates have been made to reflect the most recent versions of specifications and best practices throughout the book. In addition to the many changes, each chapter has a set of exercise questions to test your understanding of the material. Possible solutions to these questions appear in Appendix A. Part I: Introduction: The introduction is where most readers should begin. The first three chapters introduce some of the goals of XML as well as the specific rules for constructing XML. Once you have read this part you should be able to read and create your own XML documents. Chapter 1: What Is XML?: This chapter cover some basic concepts, introducing the fact that XML is a markup language (a bit like HTML) whereby you can define your own elements, tags, and attributes (known as a vocabulary). You’ll see that tags have no presentation meaning—they’re just a way to describe the structure of the data. Chapter 2: Well-Formed XML: In addition to explaining what well-formed XML is, we offer a look at the rules that exist (the XML 1.0 and 1.1 Recommendations) for naming and structuring elements—you need to comply with these rules in order to produce well-formed XML. Chapter 3: XML Namespaces: Because tags can be made up, you need to avoid name conflicts when sharing documents. Namespaces provide a way to uniquely identify a group of tags, using a URI. This chapter explains how to use namespaces. Part II: Validation: In addition to the well-formedness rules you learn in Part I, you will most likely want to learn how to create and use different XML vocabularies. This Part introduces you to DTDs, XML Schemas, and RELAX NG: three languages that define custom XML vocabularies. It also shows you how to utilize these definitions to validate your XML documents. Chapter 4: Document Type Definitions: You can specify how an XML document should be structured, and even provide default values, using Document Type Definitions (DTDs). If XML conforms to the associated DTD, it is known as valid XML. This chapter covers the basics of using DTDs. Chapter 5: XML Schemas: XML Schemas, like DTDs, enable you to define how a document should be structured. In addition to defining document structure, they enable you to specify the individual datatypes of attribute values and element content. They are a more powerful alternative to DTDs. Chapter 6: RELAX NG: RELAX NG is a third technology used to define the structure of documents. In addition to a new syntax and new features, it takes the best from XML Schemas and DTDs, and is therefore very simple and very powerful. RELAX NG has two syntaxes; both the full syntax and compact syntax are discussed. Part III: Processing: In addition to defining and creating XML documents, you need to know how to work with documents to extract information and convert it to other formats. In fact, easily extracting information and converting it to other formats is what makes XML so powerful. Chapter 7: XPath: The XPath language is used to locate sections and data in the XML document, and it’s important in many other XML technologies. Chapter 8: XSLT: XML can be transformed into other XML documents, HTML, and other formats using XSLT stylesheets, which are introduced in this chapter. Part IV: Databases: Creating and processing XML documents is good, but eventually you will want to store those documents. This section describes strategies for storing and retrieving XML documents and document fragments from different databases. Chapter 9: XQuery, the XML Query Language: Very often, you will need to retrieve information from within a database. XQuery, which is built on XPath and XPath2, enables you to do this in an elegant way. Chapter 10: XML and Databases: XML is perfect for structuring data, and some traditional databases are beginning to offer support for XML. This chapter discusses these, and provides a general overview of how XML can be used in an n-tier architecture. In addition, new databases based on XML are introduced. Part V: Programming: At some point in your XML career, you will need to work with an XML document from within a custom application. The two most popular methodologies, the Document Object Model (DOM) and the Simple API for XML (SAX), are explained in this part. Chapter 11: The Document Object Model (DOM): Programmers can use a variety of programming languages to manipulate XML using the Document Object Model’s objects, interfaces, methods, and properties, which are described in this chapter. Chapter 12: Simple API for XML (SAX): An alternative to the DOM for programmatically manipulating XML data is to use the Simple API for XML (SAX) as an interface. This chapter shows how to use SAX and utilizes examples from the Java SAX API. Part VI: Communication: Sending and receiving data from one computer to another is often difficult, but several technologies have been created to make communication with XML much easier. This part discusses RSS and content syndication, as well as web services and SOAP. This edition includes a new chapter on Ajax techniques. Chapter 13: RSS, Atom, and Content Syndication: RSS is an actively evolving technology that is used to publish syndicated news stories and website summaries on the Internet. This chapter not only discusses how to use the different versions of RSS and Atom, it also covers the future direction of the technology. In addition, it demonstrates how to create a simple newsreader application that works with any of the currently published versions. Chapter 14: Web Services: Web services enable you to perform cross-computer communications. This chapter describes web services and introduces you to using remote procedure calls in XML (using XML-RPC and REST), as well as giving you a brief look at major topics such as SOAP. Finally, it breaks down the assortment of specifications designed to work in conjunction with web services. Chapter 15: SOAP and WSDL: Fundamental to XML web services, the Simple Object Access Protocol (SOAP) is one of the most popular specifications for allowing cross-computer communications. Using SOAP, you can package up XML documents and send them across the Internet to be processed. This chapter explains SOAP and the Web Services Description Language (WSDL) that is used to publish your service. Chapter 16: Ajax: Ajax enables you to utilize JavaScript with web services and SOAP, or REST communications. Additionally, Ajax patterns can be used within web pages to communicate with the web server without refreshing. This chapter is new to the Fourth Edition. Part VII: Display: Several XML technologies are devoted to displaying the data stored inside of an XML document. Some of these technologies are web-based, and some are designed for applications and mobile devices. This part discusses the primary display strategies and formats used today. Chapter 17: Cascading Style Sheets (CSS): Website designers have long been using Cascading Style Sheets (CSS) with their HTML to easily make changes to a website’s presentation without having to touch the underlying HTML documents. This power is also available for XML, enabling you to display XML documents right in the browser. Or, if you need a bit more flexibility with your presentation, you can use XSLT to transform your XML to HTML or XHTML and then use CSS to style these documents. Chapter 18: XHTML: XHTML is a new version of HTML that follows the rules of XML. This chapter discusses the differences between HTML and XHTML, and shows you how XHTML can help make your sites available to a wider variety of browsers, from legacy browsers to the latest browsers on mobile phones. Chapter 19: Scalable Vector Graphics (SVG): Do you want to produce a custom graphic using XML? SVG enables you to describe a graphic using XML-based vector commands. This chapter teaches you the basics of SVG and then dives into a more complex SVG-based application that can be published to the Internet. Chapter 20: XForms: XForms are XML-based forms that can be used to design desktop applications, paper-based forms, and of course XHTML-based forms. This chapter demonstrates both the basics and some of the more interesting uses of XForms. Part VIII: Case Study: Throughout the book you’ll gain an understanding of how XML is used in web, business-to-business (B2B), data storage, and many other applications. The case study covers an example application and shows how the theory can be put into practice in real-life situations. The case study is new to this edition. Chapter 21: Case Study: Payment Calculator: This case study explores some of the possibilities and strategies for using XML in your website. It includes an example that demonstrates a loan payment calculator by creating a web page using XHTML and CSS, communicating with a local web service using AJAX, utilizing an XML Schema to build data structures in .NET, and ultimately using the Document Object Model to display the results in SVG. An online version of this case study on the book’s website covers the same material using Ruby on Rails instead of .NET. Appendixes: Appendix A provides answers to the exercise questions that appear throughout the book. The remaining appendixes provide reference material that you may find useful as you begin to apply the knowledge gained throughout the book in your own applications. These are: Appendix B: XPath Reference; Appendix C: XSLT Reference; Appendix D: The XML Document Object Model; Appendix E: XML Schema Element and Attribute Reference; Appendix F: XML Schema Datatypes Reference; Appendix G: SAX 2.0.2 Reference. Appendixes A, B, and C are included within the book; Appendixes D–G are available on the book’s website.