GPars is a concurrency library for Groovy that avoids errors from thread management. It includes asynchronous collections and closures, actors, and dataflow agents. GPars makes parallelizing code easy by adding concurrent methods to collections using a category. Testing should focus on the code, not GPars, since it doesn't change code.

1. GPars Quick Hits Eric Sword

3. Former head of engineering here at Group Logic

4. Now full-time dev and tech lead for SAIC

5. Blog: http://www.swordsystems.com

6. [email_address]

10. import groovyx.gpars.XXX

12. http://www.jroller.com/vaclav/

13. Jetbrains (makers of Intellij IDEA) employee?

14. Very responsive

15. Keeps an eye on GPars news

18. <groupId>org.codehaus.groovy</groupId>

19. <artifactId>groovy-all</artifactId>

20. <version>1.8.2</version>

21. </dependency>

22. <dependency>

23. <groupId>org.codehaus.gpars</groupId>

24. <artifactId>gpars</artifactId>

25. <version>0.12</version>

29. extra166y-1.7.0.jar

31. Actors like Scala

32. Dataflow

33. Agents like Clojure

35. Actors like Scala

36. Dataflow

37. Agents like Clojure

39. No re-architecture

41. Collections – code withPool { urls.makeConcurrent().collect{it.text} } //chain together withPool { urls.makeConcurrent() .collect{it.text} .findAll{it.contains 'GROOVY'} .size()} }

43. Beware some examples in Ref Guide

44. Beware tutorials written for <=0.10

45. http://gpars.codehaus.org/Breaking+Changes

48. Example...

50. map -> collect, filter -> findAll From ReGina, Figure 17.1

54. Bonus! Your code doesn't change

57. Actual code in GparsPoolUtil

58. Map-Reduce methods also in that file in contained class PAWrapper

60. http://git.codehaus.org/gitweb.cgi?p=gpars.git;a=tree;f=src/test/groovy/groovyx/gpars/samples

61. http://www.manning.com/koenig2/

62. http://www.slideshare.net/gr8conf/g-pars-vaclavpech2011

63. http://www.slideshare.net/VaclavPech/pick-up-the-lowhanging-concurrency-fruit

65. http://www.slideshare.net/paulk_asert/groovy-and-concurrency

67. http://www.swordsystems.com

68. http://www.slideshare.net/ericsword/gpars-quick-hits

69. [email_address]