1. Side-B: Technical Part

2. groovyserver

5. based on: Ver 0.4-SNAPSHOT(7/24)

7. !"#$%&'()*
based on: Ver 0.4-SNAPSHOT(7/24)

8. $ groovyserver

9. GroovyServer main()

10. ServerSocket Listen
1961

11. $ groovyclient -e “println(‘Hello, GroovyServ!’)”
groovyclient
1961(default) groovyserver

12. RequestWorker start()

13. ClientConnection#openSession()
InvocationRequest

14. groovyclient Groovy

15. Groovy

16. +,-./012345
67389:3467;5
<=6#+,4
based on: Ver 0.4-SNAPSHOT(7/24)

17. $ groovyserver

18. GroovyServer main()

19. System.in/out/err
!

20. ~/.groovy/groovyserv/cookie

21. ServerSocket Listen
1961

22. $ groovyclient -e “println(‘Hello, GroovyServ!’)”
./groovy/groovyserv/cookie
Cookie
groovyclient
Cookie: 425ba835cb32688b1
1961(default) groovyserver

23. Socket Loopback Address
RequestWorker

24. RequestWorker
ClientConnection
CientConnection
ThreadGroup
Singleton

25. RequestWorker start()

26. ClientConnection#openSession()
InvocationRequest
Cookie

27. groovyclient
System.in

28. groovyclient Groovy

29. groovyclient
(CWD) JVM
1. “user.dir”
2. JNA JVM CWD
3. CWD

30. GroovyMain
GroovyMain2 Groovy

31. >?@A4BCDE3:2

32. -
(CWD)
CTRL+C

33. -
(CWD)
CTRL+C

34. -
System.out(err)
System.in
HTTP

35. System.out(err)
!script"
println “Hello, GroovyServ!”
Socket
System.out
OutputStream#write() ClientConnection
(StreamResponse
OutputStream)
OutputStream
ClientConnectionRepository groovyclient
ThreadGroup
ClientConnection if Channel ==”out” if Channel ==”err”
" "
Hello, GroovyServ!

36. groovyclient StreamRequestHandler
Socket.inputStream.read()
pipedOutputStream.write()
ClientConnection
PipedOutputStream ClientConnection
Repository
ThreadGroup
ClientConnection
PipedInputStream
ClientConnection System.in
PipedInputStream (StreamRequestInputStream)
System.in
!script"
System.in.eachLine { ... }

37. Piped
[ ] Size:-1
[ A] StreamRequestInputStream
Socket#getInputStream()
System.in
[ B] StreamRequestInputStream PipedInputStream()

38. Request
InvocationRequest
Groovy
StreamRequest
Response
StreamResponse

39. InvocationRequest
'Cwd:' <cwd> LF
'Arg:' <argn> LF
'Arg:' <arg1> LF
'Arg:' <arg2> LF
'Cp:' <classpath> LF
'Cookie:' <cookie> LF
LF
where:
<cwd> is current working directory.
<arg1><arg2>.. are commandline arguments(optional).
<classpath>.. is the value of environment variable
CLASSPATH(optional).
<cookie> is authentication value which certify client is
the user who invoked the server.
LF is line feed (0x0a, 'n').

40. StreamRequest
'Size:' <size> LF
LF
<data from STDIN>
where:
<size> is the size of data to send to server. <size>==-1
means client exited.
<data from STDIN> is byte sequence from standard input.

41. StreamResponse
'Status:' <status> LF
'Channel:' <id> LF
'Size:' <size> LF
LF
<data for STDERR/STDOUT>
where:
<status> is exit status of invoked groovy script.
<id> is 'out' or 'err', where 'out' means standard output
of the program. 'err' means standard error of the program.
<size> is the size of chunk.
<data from STDERR/STDOUT> is byte sequence from standard
output/error.

42. -
(CWD)
CTRL+C

43. Cookie / Loopback only
2
Only from Loopback address
InetAddress#isLoopbackAddress()
Cookie
Loopback address
NG
HTTP Cookie
~/.groovy/groovyserv/
cookie
Cookie
Authentication failed

44. -
(CWD)
CTRL+C

45. CLASSPATH
CLASSPATH
InvocationRequest Cp
GroovyMain2 “groovy.classpath”
GroovyMain2
groovy.classpath
groovyserver -r
-cp
InvocationRequest Arg
GroovyMain2

46. -
(CWD)
CTRL+C

47. CWD(Current Working Directory)
Java
GroovyServ CWD
CWD
$ cd /tmp
$ groovyserver -r
$ cd /home/kobo
$ cat > hoge.txt
HOGE!!
^C
$ groovyclient -e ‘println(new File(“hoge.txt”).text)’
Caught: java.io.FileNotFoundException: hoge.txt (No such file or directory)
...SNIP...

48. “user.dir”
File#getAbsolutePath()
“"user.dir", which is initialized during jvm
startup, should be used as an informative/readonly
system property” posted 2008-08-18
http://bugs.sun.com/bugdatabase/view_bug.do;:YfiG?bug_id=4117557
JNA JVM CWD
“user.dir”
FileInputStream
CWD
Groovy

49. JNA cwd POM
<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna</artifactId>
<version>3.2.2</version>
</dependency>
# OK
import com.sun.jna.Library
import com.sun.jna.Native
import com.sun.jna.Platform
interface CLibrary extends Library {
String libname = (Platform.isWindows() ? "msvcrt" : "c")
CLibrary INSTANCE = Native.loadLibrary(libname, CLibrary.class)
int chdir(String dir)
int _chdir(String dir)
}

50. -
(CWD)
CTRL+C

51. groovyserver
Windows groovyserver.bat
PID Linux/MacOSX PID
kill
Windows Address already in
use
BAT PID

52. -
(CWD)
CTRL+C

53. CTRL+C
groovyclient
CTRL+C
“Size: -1”
StreamRequestHandler

54. -
(CWD)
CTRL+C

55. java.util.concurrent
2
StreamRequestHandler
Groovy
GroovyInvokeHandler

56. NW
Groovy
CTRL+C

57. System.exit()
JVM

59. Maven + GMaven
Maven + GMaven
GMaven
Gradle Gradle
0.4-SNAPSHOT groovy
groovyc JDK API private
IncompatibleClassChange
Error

60. IntegrationTest
GroovyServ
groovyclient
maven-failsafe-plugin “mvn integration-
test”
http://maven.apache.org/plugins/maven-failsafe-plugin/
index.html
mvn

61. How to Build
Maven2
$ cd groovyserv-<Version>
$ mvn clean verify
:
target/groovyserv-<Version>-<OS>-<arch>-bin.zip
Integration-Test
target/groovyserv-<Version>-<OS>-<arch>.dir/groovyserv-<Version>-<OS>-<arch>
:
EncodeIT UTF-8
$ export _JAVA_OPTIONS=-Dfile.encoding=UTF-8
$ mvn -Dmaven.test.skip=true clean package
Windows Cygwin gcc

62. >?:')DFFFF

63. Remote GroovyServ
OFF
Only Loopback adress
Cookie

64. 3
groovyserver
Loopback Address
Cookie
grovyclient
“localhost”=>
A
groovyserver
B
groovyclient

66. GroovyServ
GitHub clone/fork
Welcome
GroovyServ
http://kobo.github.com/groovyserv
GitHub
http://github.com/kobo/groovyserv