Easy Going Groovy 2nd season on DevLOVE

1. 2011.1.24

2. Slide # 2 DevLOVE Groovy 2011.1.24

3. http://d.hatena.ne.jp/uehaj/ Slide # 3 DevLOVE Groovy 2011.1.24

4. new! JJUG CCC update Slide # 4 DevLOVE Groovy 2011.1.24

7. import java.io.*; BufferedReader bis = new BufferedReader import java.net.*; (new InputStreamReader(ins)); String line; public class SocketAccess { while ((line = bis.readLine()) != null) { System.out.println(line); public static void main(String[] args) { } Socket soc = null; } InputStream ins = null; catch (IOException e) { OutputStream outs = null; e.printStackTrace(); try { try { soc = new Socket("www.java-users.jp", 80); if (soc != null) soc.close(); ins = soc.getInputStream(); } outs = soc.getOutputStream(); catch(IOException ex) {} outs.write("GET / HTTP/1.0nn".getBytes } ()); } } Slide # 7 DevLOVE Groovy 2011.1.24

12. BufferedReader bis = new BufferedReader (new InputStreamReader(ins)); String line; public class SocketAccess { while ((line = bis.readLine()) != null) { System.out.println(line); public static void main(String[] args) { } Socket soc = null; } InputStream ins = null; catch (IOException e) { OutputStream outs = null; e.printStackTrace(); try { try { soc = new Socket("www.java-users.jp", 80); if (soc != null) soc.close(); ins = soc.getInputStream(); } outs = soc.getOutputStream(); catch(IOException ex) {} outs.write("GET / HTTP/1.0nn".getBytes } ()); } } Slide #10 DevLOVE Groovy 2011.1.24

13. BufferedReader bis = new BufferedReader (new InputStreamReader(ins)); String line; public class SocketAccess { while ((line = bis.readLine()) != null) { System.out.println(line); public static void main(String[] args) { } Socket soc = null; } InputStream ins = null; catch (IOException e) { OutputStream outs = null; e.printStackTrace(); try { try { soc = new Socket("www.java-users.jp", 80); if (soc != null) soc.close(); ins = soc.getInputStream(); } outs = soc.getOutputStream(); catch(IOException ex) {} outs.write("GET / HTTP/1.0nn".getBytes } ()); } } Slide #10 DevLOVE Groovy 2011.1.24

14. BufferedReader bis = new BufferedReader (new InputStreamReader(ins)); String line; while ((line = bis.readLine()) != null) { System.out.println(line); } Socket soc = null; } InputStream ins = null; catch (IOException e) { OutputStream outs = null; e.printStackTrace(); try { try { soc = new Socket("www.java-users.jp", 80); if (soc != null) soc.close(); ins = soc.getInputStream(); } outs = soc.getOutputStream(); catch(IOException ex) {} outs.write("GET / HTTP/1.0nn".getBytes } ()); Slide #11 DevLOVE Groovy 2011.1.24

15. BufferedReader bis = new BufferedReader (new InputStreamReader(ins)); String line; while ((line = bis.readLine()) != null) { System.out.println(line); } Socket soc = null; } InputStream ins = null; catch (IOException e) { OutputStream outs = null; e.printStackTrace(); try { try { soc = new Socket("www.java-users.jp", 80); if (soc != null) soc.close(); ins = soc.getInputStream(); } outs = soc.getOutputStream(); catch(IOException ex) {} outs.write("GET / HTTP/1.0nn".getBytes } ()); Slide #11 DevLOVE Groovy 2011.1.24

16. BufferedReader bis = new BufferedReader (new InputStreamReader(ins)); String line; while ((line = bis.readLine()) != null) { System.out.println(line); } Socket soc = null; InputStream ins = null; OutputStream outs = null; soc = new Socket("www.java-users.jp", 80); if (soc != null) soc.close(); ins = soc.getInputStream(); outs = soc.getOutputStream(); outs.write("GET / HTTP/1.0nn".getBytes ()); Slide #12 DevLOVE Groovy 2011.1.24

17. BufferedReader bis = new BufferedReader (new InputStreamReader(ins)); String line; while ((line = bis.readLine()) != null) { System.out.println(line); } Socket soc = null; InputStream ins = null; OutputStream outs = null; soc = new Socket("www.java-users.jp", 80); if (soc != null) soc.close(); ins = soc.getInputStream(); outs = soc.getOutputStream(); outs.write("GET / HTTP/1.0nn".getBytes ()); Slide #12 DevLOVE Groovy 2011.1.24

18. bis = new BufferedReader(new InputStreamReader(ins)); def line = null; while ((line = bis.readLine()) != null) { System.out.println(line); } def soc = null; def ins = null; def outs = null; soc = new Socket("www.java-users.jp", 80); if (soc != null) soc.close(); ins = soc.getInputStream(); outs = soc.getOutputStream(); outs.write("GET / HTTP/1.0nn".getBytes ()); Slide #13 DevLOVE Groovy 2011.1.24

19. bis = new BufferedReader(new InputStreamReader(ins)); def line = null; while ((line = bis.readLine()) != null) { System.out.println(line); } def soc = null; def ins = null; def outs = null; soc = new Socket("www.java-users.jp", 80); if (soc != null) soc.close(); ins = soc.getInputStream(); outs = soc.getOutputStream(); outs.write("GET / HTTP/1.0nn".getBytes ()); Slide #13 DevLOVE Groovy 2011.1.24

20. bis = new BufferedReader(new InputStreamReader(ins)); def line = null; while ((line = bis.readLine()) != null) { System.out.println(line); } } new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".getBytes ()); Slide #14 DevLOVE Groovy 2011.1.24

21. bis = new BufferedReader(new InputStreamReader(ins)); def line = null; while ((line = bis.readLine()) != null) { System.out.println(line); } } new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".getBytes ()); Slide #14 DevLOVE Groovy 2011.1.24

22. ins.eachLine{ line -> System.out.println(line); } } new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".getBytes ()); Slide #15 DevLOVE Groovy 2011.1.24

23. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".getBytes()); ins.eachLine { line -> System.out.println(line); } } Slide #16 DevLOVE Groovy 2011.1.24

26. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".bytes); ins.eachLine { line -> System.out.println(line); } } Slide #18 DevLOVE Groovy 2011.1.24

27. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".bytes); ins.eachLine { line -> System.out.println(line); } } Slide #18 DevLOVE Groovy 2011.1.24

28. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".bytes); ins.eachLine { line -> println(line); } } Slide #19 DevLOVE Groovy 2011.1.24

29. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".bytes); ins.eachLine { line -> println(line); } } Slide #19 DevLOVE Groovy 2011.1.24

30. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".bytes); ins.eachLine { println(it); } } Slide #20 DevLOVE Groovy 2011.1.24

31. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".bytes); ins.eachLine { println(it); } } Slide #20 DevLOVE Groovy 2011.1.24

32. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".bytes) ins.eachLine { println(it) } } Slide #21 DevLOVE Groovy 2011.1.24

33. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write("GET / HTTP/1.0nn".bytes) ins.eachLine { println(it) } } Slide #21 DevLOVE Groovy 2011.1.24

34. new Socket("www.java-users.jp", 80).withStreams { ins, outs -> outs.write "GET / HTTP/1.0nn".bytes ins.eachLine { println it } } Slide #22 DevLOVE Groovy 2011.1.24

35. println new URL("http://www.java-users.jp").text Slide #23 DevLOVE Groovy 2011.1.24

36. println new URL("http://www.java-users.jp").text Java Groovy Java 7 Slide #23 DevLOVE Groovy 2011.1.24

37. Gaelyk Grails(Web) GSQL GSP,GORM SwingBuilder Griffon(GUI) MarkupBuilder GMaven,Maven3 /DSL Hudson JBoss Gant FreeMind Gradle Spock,EasyB Gpars Groovy++ Slide #24 DevLOVE Groovy 2011.1.24

39. Slide #26 DevLOVE Groovy 2011.1.24

41. @Grab('net.sourceforge.htmlunit:htmlunit:2.8') import com.gargoylesoftware.htmlunit.WebClient; // Ant Bzip2 new AntBuilder().bzip2(src:args[0], zipfile:args[0]+".bz2") // HtmlUnit url = "http://pukiwiki.example.com/index.php? plugin=attach&pcmd=upload&page=test" page = new WebClient().getPage(url) file = page.getElementById('_p_attach_file') file.valueAttribute = args[0]+".bz2" page.getByXPath("//input[@value=' ']")[0].click() Slide #28 DevLOVE Groovy 2011.1.24

45. @Grab('net.sourceforge.htmlunit:htmlunit:2.8') import com.gargoylesoftware.htmlunit.WebClient; Slide #29 DevLOVE Groovy 2011.1.24

46. // Ant Bzip2 new AntBuilder().bzip2(src:args[0], zipfile:args[0]+".bz2") Slide #30 DevLOVE Groovy 2011.1.24

48. cities.csv ,35676000, ,19040000, = ,1018000, ,5492000, Slide #31 DevLOVE Groovy 2011.1.24

49. cities.csv ,35676000, ,19040000, , , = ,1018000, ,5492000, Slide #31 DevLOVE Groovy 2011.1.24

50. @Grab('com.h2database:h2:1.2.143') @GrabConfig(systemClassLoader=true) import groovy.sql.Sql sql = Sql.newInstance("jdbc:h2:cities") sql.execute """ CREATE TABLE Cities ( id INT IDENTITY PRIMARY KEY, name VARCHAR, population DECIMAL(10), country VARCHAR)""" cities = sql.dataSet("Cities") new File("cities.csv").splitEachLine(",") { f1, f2, f3 -> // cities.add(name:f1, population:f2, country:f3) } assert cities.findAll{ it.country==" " && it.population>1000000 }.rows()*.name == [' ', ' = ( )', ' ', ' ', ' '] Slide #32 DevLOVE Groovy 2011.1.24

55. @Grab('com.h2database:h2:1.2.143') @GrabConfig(systemClassLoader=true) import groovy.sql.Sql Slide #33 DevLOVE Groovy 2011.1.24

56. cities = sql.dataSet("Cities") new File("cities.csv").splitEachLine(",") { f1, f2, f3 -> // cities.add(name:f1, population:f2, country:f3) } Slide #34 DevLOVE Groovy 2011.1.24

57. cities = sql.dataSet("Cities") assert cities.findAll{ it.country==" " && it.population>1000000 }.rows()*.name == [' ', ' = ( )', ' ', ' ', ' '] cities = sql.dataSet("Cities") assert cities.findAll{ it.country==" " } .findAll{ it.population>1000000 }.rows()*.name == [' ', ' = ( )', ' ', ' ', ' '] Slide #35 DevLOVE Groovy 2011.1.24

59. update http://d.hatena.ne.jp/ksky/20090618/p1 Slide #37 DevLOVE Groovy 2011.1.24

60. update ! http://d.hatena.ne.jp/ksky/20090618/p1 Slide #37 DevLOVE Groovy 2011.1.24

61. http://kokucheese.com/event/index/5267/ Slide #38 DevLOVE Groovy 2011.1.24

62. http://bit.ly/g5iE0m Slide #39 DevLOVE Groovy 2011.1.24

65. update Slide #42 DevLOVE Groovy 2011.1.24

66. http://kobo.github.com/groovyserv/ Slide # 43 DevLOVE Groovy 2011.1.24

68. Shell Environment User Groovy Srcipt C LA SS . lin PA cm System.in TH d System.out en e v SYstem.err ar gs Ctrl-C groovyclient TCP/IP groovyserver n di st de t st dou rr JavaVM st exit status File System Authentication Cookie File Slide # DevLOVE Groovy 2011.1.24 45

69. User Groovy Shell Environment Srcipt C LA System.in SS . lin PA cm System.out TH d SYstem.err en e v ar gs Ctrl-C groovy n di st de t st dou JavaVM rr st exit status File System Slide #46 DevLOVE Groovy 2011.1.24

70. 19.6 normal groovy 3.041 1.0 Installer groovy 1.262 2.4 groovyclient(C ) 0.155 19.6 groovyclient(Ruby ) 0.193 15.8 •Groovy 1.7.3, GroovyServ 0.4-SNAPSHOT, WinXP SP3,Core2Duo 2GHz,JDK1 Slide # •time DevLOVE real 10 Groovy 2011.1.24

71. 35.8 normal groovy 1.112 1.0 Mac Ports groovy(1.7.2) 0.321 3.5 groovyclient(C ) 0.031 35.8 groovyclient(Ruby ) 0.041 27.1 •Groovy 1.7.3, GroovyServ 0.4-SNAPSHOT, MacOSX 10.6.3, MacBook Core2duo 2.53GHz, JDK1.6.0u20 •time real 10 Slide #48 DevLOVE Groovy 2011.1.24

72. for (i=0; i<1000000; i++) {}; groovy(Client VM) 593.7 groovy(Server VM) 243.8 groovyclient(Client VM) 454.6 groovyclient(Server VM) 197.0 •Groovy 1.7.3, GroovyServ 0.4, Windows XP SP3(cygwin 1.7.5),Core2duo 2.00GHz, JDK1.6.0u13 Slide #49 DevLOVE •time Groovy 2011.1.24 real

73. Groovy for (i=0; i<1000000; i++) {}; scalac 6.6 1.0 fsc 1.2 5.5 scalac/GroovyServ 1.1 6.6 fsc/GroovyServ 0.4 16.5 Slide #50 DevLOVE Groovy 2011.1.24

76. new! thanks for the great work on groovyserv! I use it everyday and enjoy its performance. I also give it lots of credit in my workshops and talks. (you may have recognized the additional hackergarten screencast.) I was thinking about maybe making GroovyServ the default way of how groovy executes a script. That sounds like a great release to me! Congratulations to the team! Great work, this thing really helps. Slide #53 DevLOVE Groovy 2011.1.24

77. new! thanks for the great work on groovyserv! I use it everyday and enjoy its performance. I also give it lots of credit in my workshops and talks. (you may have recognized the additional hackergarten screencast.) I was thinking about maybe making GroovyServ the default way of how groovy executes a script. That sounds like a great release to me! Congratulations to the team! Great work, this thing really helps. Slide #53 DevLOVE Groovy 2011.1.24

81. GEP ‥ Groovy Enhancement Proposal Slide #57 DevLOVE Groovy 2011.1.24

82. 100 1 2 3 { -> } 1 100 . ( ) 1 100 . ( ) { -> + " 6 " } " " http://d.hatena.ne.jp/uehaj/20100919/1284906117 10.0 18 6 2 24 6 6 [6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, : 78, 84, 90, 96] 6 6 96 6 12 6 Slide #58 DevLOVE Groovy 2011.1.24

83. (100). ( ). ( ) (1). (2). (3). ( ). ( ({ -> ( ). ( ) })) (1). (100). (( . ( ))). ( ) (1). (100). ( . ( )). ( ({ -> ( + " 6 "). ( ) })) (" "). ( ) Slide #59 DevLOVE Groovy 2011.1.24

84. new int fib (int n) { groovyc if (n<=1) return 1 return fib(n-1) + fib(n-2) jad } Slide #60 DevLOVE Groovy 2011.1.24

85. new int fib (int n) { groovyc if (n<=1) return 1 return fib(n-1) + fib(n-2) jad } public int fib(int n) { CallSite acallsite[] = $getCallSiteArray(); if(ScriptBytecodeAdapter.compareLessThanEqual (DefaultTypeTransformation.box(n), $const$0)) return DefaultTypeTransformation.intUnbox((Integer) ScriptBytecodeAdapter.castToType($const$0, $get$$class$java$lang$Integer())); else return DefaultTypeTransformation.intUnbox((Integer) ScriptBytecodeAdapter.castToType(acallsite[0].call(acallsite[1].callCurrent (this, acallsite[2].call(DefaultTypeTransformation.box(n), $const$0)), acallsite[3].callCurrent(this, acallsite[4].call (DefaultTypeTransformation.box(n), $const$1))), $get$$class$java$lang$Integer ())); } Slide #60 DevLOVE Groovy 2011.1.24

86. new int fib (int n) { groovyc if (n<=1) return 1 return fib(n-1) + fib(n-2) jad } public int fib(int n) public int fib(int n) { { CallSite acallsite[] = $getCallSiteArray(); CallSite acallsite[] = $getCallSiteArray(); if(!ScriptBytecodeAdapter.isOrigInt()) if(ScriptBytecodeAdapter.compareLessThanEqual((Integer) if(ScriptBytecodeAdapter.compareLessThanEqual DefaultTypeTransformation.box(n), (Integer) (DefaultTypeTransformation.box(n), $const$0)) DefaultTypeTransformation.box(1))) return DefaultTypeTransformation.intUnbox((Integer) return 1; ScriptBytecodeAdapter.castToType($const$0, $get$$class$java$lang$Integer())); else else return DefaultTypeTransformation.intUnbox(acallsite return DefaultTypeTransformation.intUnbox((Integer) [0].call(acallsite[1].callCurrent(this, acallsite[2].call ScriptBytecodeAdapter.castToType(acallsite[0].call(acallsite[1].callCurrent ((Integer)DefaultTypeTransformation.box(n), (Integer) DefaultTypeTransformation.box(1))), acallsite[3].callCurrent (this, acallsite[2].call(DefaultTypeTransformation.box(n), $const$0)), (this, acallsite[4].call((Integer)DefaultTypeTransformation.box acallsite[3].callCurrent(this, acallsite[4].call (n), (Integer)DefaultTypeTransformation.box(2))))); (DefaultTypeTransformation.box(n), $const$1))), $get$$class$java$lang$Integer if(n <= 1) ())); return 1; } else return fib(n - 1) + fib(n - 2); } Slide #60 DevLOVE Groovy 2011.1.24

87. new int fib (int n) { groovyc if (n<=1) return 1 return fib(n-1) + fib(n-2) jad } public int fib(int n) public int fib(int n) { { CallSite acallsite[] = $getCallSiteArray(); CallSite acallsite[] = $getCallSiteArray(); if(!ScriptBytecodeAdapter.isOrigInt()) if(ScriptBytecodeAdapter.compareLessThanEqual((Integer) if(ScriptBytecodeAdapter.compareLessThanEqual DefaultTypeTransformation.box(n), (Integer) (DefaultTypeTransformation.box(n), $const$0)) DefaultTypeTransformation.box(1))) return DefaultTypeTransformation.intUnbox((Integer) return 1; ScriptBytecodeAdapter.castToType($const$0, $get$$class$java$lang$Integer())); else else return DefaultTypeTransformation.intUnbox(acallsite return DefaultTypeTransformation.intUnbox((Integer) [0].call(acallsite[1].callCurrent(this, acallsite[2].call ScriptBytecodeAdapter.castToType(acallsite[0].call(acallsite[1].callCurrent ((Integer)DefaultTypeTransformation.box(n), (Integer) DefaultTypeTransformation.box(1))), acallsite[3].callCurrent (this, acallsite[2].call(DefaultTypeTransformation.box(n), $const$0)), (this, acallsite[4].call((Integer)DefaultTypeTransformation.box acallsite[3].callCurrent(this, acallsite[4].call (n), (Integer)DefaultTypeTransformation.box(2))))); (DefaultTypeTransformation.box(n), $const$1))), $get$$class$java$lang$Integer if(n <= 1) ())); return 1; } else return fib(n - 1) + fib(n - 2); } Slide #60 DevLOVE Groovy 2011.1.24

88. new int fib (int n) { groovyc if (n<=1) return 1 return fib(n-1) + fib(n-2) jad } public int fib(int n) public int fib(int n) { { CallSite acallsite[] = $getCallSiteArray(); if(n <= 1) CallSite acallsite[] = $getCallSiteArray(); if(!ScriptBytecodeAdapter.isOrigInt()) if(ScriptBytecodeAdapter.compareLessThanEqual((Integer) return 1; if(ScriptBytecodeAdapter.compareLessThanEqual DefaultTypeTransformation.box(n), (Integer) (DefaultTypeTransformation.box(n), $const$0)) else DefaultTypeTransformation.box(1))) return DefaultTypeTransformation.intUnbox((Integer) return 1; else fib(n - 1) + fib(n - 2); return ScriptBytecodeAdapter.castToType($const$0, $get$$class$java$lang$Integer())); else return DefaultTypeTransformation.intUnbox(acallsite return DefaultTypeTransformation.intUnbox((Integer) [0].call(acallsite[1].callCurrent(this, acallsite[2].call ScriptBytecodeAdapter.castToType(acallsite[0].call(acallsite[1].callCurrent ((Integer)DefaultTypeTransformation.box(n), (Integer) DefaultTypeTransformation.box(1))), acallsite[3].callCurrent (this, acallsite[2].call(DefaultTypeTransformation.box(n), $const$0)), (this, acallsite[4].call((Integer)DefaultTypeTransformation.box acallsite[3].callCurrent(this, acallsite[4].call (n), (Integer)DefaultTypeTransformation.box(2))))); (DefaultTypeTransformation.box(n), $const$1))), $get$$class$java$lang$Integer if(n <= 1) ())); return 1; } else return fib(n - 1) + fib(n - 2); } Slide #60 DevLOVE Groovy 2011.1.24

89. new long begin = System.nanoTime(); FibJava foo = new FibJava(); int result = foo.fib(32); // long end = System.nanoTime(); System.out.println("Elapsed time: " + (end - begin) + "ns"); (ns) Java 1 Groovy 1.7.5 1,639,852,000 66.46 Groovy 1.8.0 beta 3 65,497,000 2.65 Java(OpenJDK 1.7) 24,672,000 1.0 • MacOSX 10.6.3, MacBook Core2duo 2.53GHz,openjdk version "1.7.0-internal" Slide #61 DevLOVE Groovy 2011.1.24

90. @Invariant({ elements != null }) class Stack { def boolean is_empty() { elements.isEmpty() private List elements } @Ensures({ is_empty() }) @Requires({ !is_empty() }) public Stack() { def last_item() { elements = [] elements.last() } } @Requires({ preElements?.size() > def count() { 0 }) elements.size() @Ensures({ !is_empty() }) } public Stack(List preElements) { elements = preElements } http://github.com/andresteingress/gcontracts/wiki Slide #62 DevLOVE Groovy 2011.1.24

91. update http://canoo.com/blog/2010/09/20/log-groovys-new-and-extensible-logging-conveniences/ Slide #63 DevLOVE Groovy 2011.1.24

92. import groovy.util.logging.Log @Log class MyClass { def invoke() { log.info('... an info message') log.fine('... a fine message') } } http://canoo.com/blog/2010/09/20/log-groovys-new-and-extensible-logging-conveniences/ Slide #64 DevLOVE Groovy 2011.1.24

93. New! Slide #65 DevLOVE Groovy 2011.1.24

94. http://kokucheese.com/event/index/5267/ Groovy&Grails exchange 2010@London by tyama, tamada ( ) Gradle G* by (LITERAL-ICE) Slide #66 DevLOVE Groovy 2011.1.24

95. http://kokucheese.com/event/index/5267/ Groovy&Grails exchange 2010@London by tyama, tamada ( ) Gradle G* by (LITERAL-ICE) Slide #66 DevLOVE Groovy 2011.1.24

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Easy Going Groovy 2nd season on DevLOVE