Java support for P2P applications

Java support beyond the low-level socket support that was detailed in earlier chapters consists of various frameworks. These range from well-known frameworks, such as JXTA, to small limited-capability protocols. These frameworks provide the basis for more specialized applications.

The following table lists several of these frameworks:

P2P framework	URL
TomP2P	http://tomp2p.net/
JXTA	https://jxta.kenai.com/
Hive2Hive	https://github.com/Hive2Hive/Hive2Hive
jnmp2p	https://code.google.com/p/jnmp2p/
FlexGP	http://flexgp.github.io/flexgp/javalibrary.html
JMaay	http://sourceforge.net/projects/jmaay/
P2P-MPI	http://grid.u-strasbg.fr/p2pmpi/
Pastry	http://www.freepastry.org/

These frameworks use an algorithm to route messages between peers. Hash tables frequently form the basis of these frameworks, as discussed next.