The book gives readers a practical introduction to reactive programming with Actor Model. The reader is given a brief but detailed background on using the Scala programming language and how to program using Scala and the Akka toolkit. After covering the basics and establishing a foundation, the book takes readers through a series of message-based integration cookbook solutions, including: Messaging Systems, Messaging Channels, Message Construction, Message Routing, Message Transportation, Message Endpoints, and System Management. The book follows the proven method presented in "Enterprise Integration Patterns" by Gregor Hohpe and Bobby Woolf, but gives solutions based on the use of Scala and Akka.

Table of Contents:
Foreword          xiii Preface          xv Acknowledgments          xxiii About the Author          xxv   Chapter 1: Discovering the Actor Model and the Enterprise, All Over Again          1 Why Enterprise Software Development Is Hard   1 Introducing Reactive Applications    5 Enterprise Applications   9 Actor Model    10 The Actor Way Is Explicit    22 What Next?    24   Chapter 2: The Actor Model with Scala and Akka          25 How to Get Scala and Akka    26 Programming with Scala    29 Programming with Akka    43 Summary   104   Chapter 3: Performance Bent           107 Transistors Matter    107 Clock Speed Matters    109 Cores and Cache Matter    111 Scale Matters    112 Multithreading Is Hard   116 How the Actor Model Helps    122 The Patterns    126   Chapter 4: Messaging with Actors            127 Message Channel    128 Message    130 Pipes and Filters    135 Message Router   140 Message Translator    143 Message Endpoint    145 Summary    147   Chapter 5: Messaging Channels          149 Point-to-Point Channel    151 Publish-Subscribe Channel   154 Datatype Channel    167 Invalid Message Channel    170 Dead Letter Channel    172 Guaranteed Delivery    175 Channel Adapter    183 Message Bridge    185 Message Bus    192 Summary    200   Chapter 6: Message Construction          201 Command Message   202 Document Message   204 Event Message    207 Request-Reply    209 Return Address    211 Correlation Identifier    215 Message Sequence    217 Message Expiration    218 Format Indicator    222 Summary    226   Chapter 7: Message Routing           227 Content-Based Router   228 Message Filter    232 Dynamic Router    237 Recipient List    245 Splitter    254 Aggregator    257 Resequencer    264 Composed Message Processor    270 Scatter-Gather    272 Routing Slip    285 Process Manager    292 Message Broker    308 Summary     310   Chapter 8: Message Transformation          313 Envelope Wrapper    314 Content Enricher    317 Content Filter   321 Claim Check    325 Normalizer    332 Canonical Message Model    333 Summary    336   Chapter 9: Message Endpoints            337 Messaging Gateway    338 Messaging Mapper    344 Transactional Client/Actor    351 Polling Consumer    362 Event-Driven Consumer     371 Competing Consumers    371 Message Dispatcher    374 Selective Consumer     377 Durable Subscriber    379 Idempotent Receiver    382 Service Activator    390 Summary    391   Chapter 10: System Management and Infrastructure           393 Control Bus    394 Detour    395 Wire Tap    397 Message Metadata/History   398 Message Journal/Store    402 Smart Proxy    406 Test Message    411 Channel Purger    414 Summary    416   Appendix A: Dotsero: An Akka-like Toolkit for .NET          417 Dotsero Actor System    417 Actors Using C# and .NET    420 Dotsero Implementation    425 Summary    427   Bibliography           429 Index              433