The Druby Book: Distributed and Parallel Computing With Ruby

by Seki, Masatoshi; Inoue, Makoto

• ISBN13: 9781934356937
• ISBN10: 193435693X
• Format: Paperback
• Copyright: 2012-03-19
• Publisher: Oreilly & Associates Inc
• More Book Details
• Purchase Benefits

Summary

dRuby has been part of the Ruby standard library for more than a decade, yet few know the true power of the gem. Completely written in Ruby, dRuby enables you to communicate between distributed Ruby processes as if there were no boundaries between processes. This is one of the few books that covers distributed and parallel programming for Ruby developers. The dRuby Book has been completely updated and expanded from its Japanese version, with three new chapters written by Masatoshi. You'll find out about the design concepts of the dRuby library, and walk through step-by-step tutorial examples. By building various distributed applications, you'll master distributed programming as well as advanced Ruby techniques such as multithreading, object references, garbage collection, and security. Then you'll graduate to advanced techniques for using dRuby with Masatoshi's other libraries, such as eRuby and Rinda---the Ruby version of the Linda distributed tuplespace system. In the three new chapters, you'll see how to integrate dRuby and eRuby, get a thorough grounding in parallel programming concepts with Rinda, and create a full text search system using Drip. Step by step, you'll gain mastery of dRuby and distributed computing. What You Need:Ruby 1.9.2 or above. All exercises were run on OS X, though it should work on any operating system. You are expected to be comfortable reading Ruby code, as we do not explain basic syntax.

Author Biography

Masatoshi Seki is a Ruby committer and an author of several Ruby standard libraries including dRuby, eRuby, and Rinda. He's the author of Distributed Object Programming with dRuby and Distributed Web Programming with dRuby (in Japanese). Translator Makoto Inoue is a database administrator turned Ruby developer living in London. He speaks about mobile development, NoSQL, and Real Time Web at conferences and meetups.

Table of Contents

Foreword	p. ix
Acknowledgments	p. xi
Preface	p. xiii
Introducing dRuby
Hello, dRuby	p. 3
Hello, World	p. 3
Building the Reminder Application	p. 7
Moving Ahead	p. 14
Architectures of Distributed Systems	p. 15
Understanding Distributed Object Systems	p. 15
Design Principles of dRuby	p. 20
dRuby in the Real World	p. 24
Moving Ahead	p. 26
Understanding dRuby
Integrating dRuby with eRuby	p. 31
Generating Templates with ERB	p. 31
Integrating WEBrick::CGI and ERB with dRuby	p. 40
Putting Them Together	p. 48
Adding an Error Page	p. 53
Changing Process Allocation	p. 54
Moving Ahead	p. 56
Pass by Reference, Pass by Value	p. 57
Passing Objects Among Processes	p. 57
Passing by Reference Automatically	p. 67
Handling Unknown Objects with DRbUnknown	p. 72
Moving Ahead	p. 75
Multithreading	p. 77
dRuby and Multithreading	p. 77
Understanding the Thread Class	p. 79
Thread-Safe Communication Using Locking, Mutex, and MonitorMixin	p. 86
Passing Objects via Queue	p. 104
Moving Ahead	p. 108
Process Coordination
Coordinating Processes Using Rinda	p. 111
Introducing Linda and Rinda	p. 111
How Rinda Works	p. 113
Basic Distributed Data Structures	p. 124
Toward Applications	p. 134
Moving Ahead	p. 136
Extending Rinda	p. 137
Adding a Timeout in a Tuple	p. 137
Adding Notifications for New Events	p. 141
Expressing a Tuple with Hash	p. 144
Removing Tuples Safely with TupleSpaceProxy	p. 146
Finding a Service with Ring	p. 148
Examples of Ring Applications	p. 155
Moving Ahead	p. 163
Parallel Computing and Persistence with Rinda	p. 165
Computing in Parallel with rinda_eval	p. 165
Concurrency in rinda_eval	p. 167
Persisting a Tuple with PTupleSpace	p. 174
Moving Ahead	p. 179
Drip: A Stream-Based Storage System	p. 181
Introducing Drip	p. 181
Drip Compared to Queue	p. 182
Drip Compared to Hash	p. 187
Browsing Data with Key	p. 190
Design Goals of the API	p. 194
Moving Ahead	p. 195
Building a Simple Search System with Drip	p. 197
Running the App	p. 197
Examining Each Component	p. 199
Crawling Interval and Synchronization with Indexer	p. 205
Resetting Data	p. 206
Using RBTree for Range Search	p. 207
Adding a Web UI	p. 213
Moving Ahead	p. 217
Running dRuby and Rinda in a Production Environment
Handling Garbage Collection	p. 221
Dealing with GC	p. 221
Using DRbIdConv to Prevent GC	p. 225
Moving Ahead	p. 227
Security in dRuby	p. 229
dRuby's Attitude Toward Security	p. 229
Accessing Remote Services via SSH Port Forwarding	p. 234
Summary	p. 241
Bibliography	p. 243
Index	p. 245
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