Conference talk for JavaOne 2012 on "java.nio.file for Remote Systems". Implementing the java.nio.file API using Overthere, an open source library built by XebiaLabs.

1. java.nio.file
forremotesystems
Vincent Partington - XebiaLabs
Jeroen van Erp - XebiaLabs

2. JeroenvanErp
@hierynomus

3. Vincent
Partington
@vpartington

5. JavaNewI/OFile

6. Recap:java.nio.fileakaNIO.2
java.nio.file.Path
java.nio.file.Files
java.nio.file.spi.FileSystemProvider
More abstract
More modular

7. java.nio.Path
Immutable!
NOT a File!

8. java.nio.Path

9. java.nio.file.Files
Use static
imports!

10. java.nio.file.Files

11. java.nio.file.spi.FileSystemProvider
Service Provider
Interface
Has a URI scheme
like: file:///

12. Demo:PlainoldNIO.2+Process
•Copy GlassFish server zip to machine
•Unzip GlassFish zip
•Start GlassFish server
•Copy PetClinic ear to GlassFish
•Show log file

13. Theproblem

14. Overthere

15. Thesolution:Overthere
java.io.File java.lang.Process

16. Thesolution:Overthere
java.io.File java.lang.Process
OverthereFile OverthereProcess
Interfaces
SPI
Remote Systems

17. nio-overthere
c.x.o.n.f.OverthereFileSystemProvider
c.x.o.n.f.OvertherePath
c.x.o.n.p.Processes

18. nio-overthere
c.x.o.n.f.OverthereFileSystemProvider
c.x.o.n.f.OvertherePath
c.x.n.o.p.Processes
Schema per
protocol
Wraps Overthere
Adds NIO Process
abstraction

19. local://
•Copy GlassFish server zip to machine
•Unzip GlassFish zip
•Start GlassFish server
•Copy PetClinic ear to GlassFish
•Show log file

20. SSH
•Secure
•File transfer
•Command execution
•Uses SSH/J
•https://github.com/shikhar/sshj

21. Tunnels
SSH
•Secure
•File transfer
•Command execution
•Uses SSH/J
•https://github.com/shikhar/sshj
SCP vs. SFTP
Interactive auth
Password
Public key

22. ssh+sftp://
•Copy GlassFish server zip to machine
•Unzip GlassFish zip
•Start GlassFish server
•Copy PetClinic ear to GlassFish
•Show log file

23. SSH+SUDO
source: xkcd.com

24. SSH+SUDO
source: xkcd.com
Transfer files with
correct ownership
Respond to Sudo
password prompt

25. ssh+sudo://
•Copy GlassFish server zip to machine
•Unzip GlassFish zip
•Start GlassFish server
•Copy PetClinic ear to GlassFish
•Show log file

26. WhataboutWindows?

27. WhataboutWindows?
WinRM
SMB / CIFS Telnet

28. CIFS
•Authentication
•Local accounts (basic auth)
•Domain accounts (NTLM)
•Uses JCIFS library
•http://jcifs.samba.org/

29. CIFS
•Authentication
•Local accounts (basic auth)
•Domain accounts (NTLM)
•Uses JCIFS library
•http://jcifs.samba.org/
No Remote
Execution

30. Telnet
NOT secure
Screen
scraping

31. cifs+telnet://
•Copy GlassFish server zip to machine
•Unzip GlassFish zip
•Start GlassFish server
•Copy PetClinic ear to GlassFish
•Show log file

32. WinRM
•WS-Management (SOAP)
•HTTP and HTTPS
•Basic auth and Kerberos

33. WinRM
•WS-Management (SOAP)
•HTTP and HTTPS
•Basic auth and Kerberos
No XML
Encryption (yet)
Pull request
welcome ;-)

34. cifs+winrm://
•Copy GlassFish server zip to machine
•Unzip GlassFish zip
•Start GlassFish server
•Copy PetClinic ear to GlassFish
•Show log file

35. Conclusions

36. NIOexperiences
Easy to use
NOprocess
abstraction
URI schemes are
nice
FileSystemProvider
is the only stateful
class
A lot of
implementation
work

37. Overthere’s NIO interface allows you to write
remote management code that is portable not
only across source platforms, but also across
target platforms

38. Overthere’s NIO interface allows you to write
remote management code that is portable not
only across source platforms, but also across
target platforms
WriteOnce,Run
AgainstAnything!

39. Moreinformation
Overthere:
https://github.com/xebialabs/overthere/
NIO-Overthere:
https://github.com/xebialabs/nio-overthere/

40. Moreinformation
Jeroen van Erp
@hierynomus
jvanerp@xebialabs.com
Vincent Partington
@vpartington
vpartington@xebialabs.com

41. Questions
?