Typical enterprises use dozens, hundreds, and sometimes even thousands of applications, components, services, and databases. Many of them are custom built in-house or by third parties, some are bought, others are based on open source projects, and the origin of a few—usually the most critical ones—is completely unknown. A lot of applications are very old, some are fairly new, and seemingly no two of them were written using the same tools. They run on heterogeneous operating systems and hardware, use databases and messaging systems from various vendors, and were written in different programming languages. See how to glue these disparate applications together using popular technologies such as: LDAP, Oracle, and MySQL XML Documents and DTDs Sockets, HTTP, and REST XML/RPC, SOAP, and others ...and more. If you're on the hook to integrate enterprise-class systems together, the tips and techniques in this book will help. Following this book's tips and techniques, readers learn how to glue disparate enterprise-class systems together using Enterprise Integration. Introduction......Page 7 What Is Enterprise Software?......Page 8 Why Ruby?......Page 9 Who Should Read This Book?......Page 10 PragBouquet......Page 11 Acknowledgments......Page 12 Databases......Page 14 The Coupon Application......Page 15 Database Interface (DBI)......Page 30 Object-Relational Mappers......Page 34 Lightweight Directory Access Protocol (LDAP)......Page 57 Processing XML......Page 81 A Short XML reminder......Page 83 Generating XML documents......Page 85 Processing XML Documents......Page 97 Validating XML Documents......Page 129 Are There Alternatives to XML?......Page 134 Low Ceremony Distributed Applications......Page 147 ``I'd Rather Use a Socket''......Page 148 Remote Procedure Calls Using HTTP......Page 161 Another Day, Another Protocol......Page 181 We Will Take No REST, Will We?......Page 191 SOAP......Page 202 CORBA, RMI, and Friends......Page 216 Internationalization and Localization......Page 236 Logging......Page 256 Creating Daemons and Services......Page 275 Build and Deployment Process......Page 282 Project Automation with Rake......Page 299 Testing Legacy Applications......Page 310 Introduction 7 What Is Enterprise Software? 8 What Is Enterprise Integration? 9 Why Ruby? 9 Who Should Read This Book? 10 PragBouquet 11 Acknowledgments 12 Databases 14 The Coupon Application 15 Database Interface (DBI) 30 Object-Relational Mappers 34 Lightweight Directory Access Protocol (LDAP) 57 Processing XML 81 A Short XML reminder 83 Generating XML documents 85 Processing XML Documents 97 Validating XML Documents 129 Are There Alternatives to XML? 134 Low Ceremony Distributed Applications 147 ``I'd Rather Use a Socket'' 148 Remote Procedure Calls Using HTTP 161 Distributed Applications with RPC 181 Another Day, Another Protocol 181 We Will Take No REST, Will We? 191 SOAP 202 CORBA, RMI, and Friends 216 Tools and Techniques 236 Internationalization and Localization 236 Logging 256 Creating Daemons and Services 275 Build and Deployment Process 282 Project Automation with Rake 299 Testing Legacy Applications 310 Typical enterprises use dozens, hundreds, and sometimes even thousands of applications, components, services, and databases. This book teaches you how to glue disparate enterprise-class systems together using Enterprise Integration techniques.
