I am just wondering if there is real practical use of JavaSpaces technology out there and how exactly its implemented.
Can someone who has worked with the tech help.
+1
A:
We are currently using javaspaces (the Sun outrigger implementation), to coordinate loosely coupled processes. The idea behind it is compelling, and the API is very simple. The actual implementation has been a problem. Its built on Jini, so 5 or 6 processes are required to bring up a space. And, at least in Sun's implementation, there is no way to have it communicate over specific ports, which makes firewalls a bit of a pain.
The other issue that we have run into is that there is no implied ordering in the space. So if you put 5 objects in, and your template on the read/take matches all 5, it is unspecified which one you will get. Depending on the application, this may or may not be an issue.
KeithB
2009-02-24 14:57:50
A:
I believe Orbitz which is a reservation system for hotels runs on Jini.
Based on Java Posse episodes #82, #84 and #86 which is an interview with Vin Simmons this technology is sometimes used in military or financial applications which are unfortunatley on the quiet.
Hayden Jones
2009-02-24 15:20:07
A:
I haven't worked with it, but I followed a presentation about it. It may help you...
pgras
2009-02-25 07:02:59
A:
I used it a few years back but it probably has not changed much.
@Keith: It is(used to be atleast) possible to start all the services in a single process/JVM and I think there is documentation out there on how to do this.
I believe Jini/Javaspaces is used in a few large applications (ticketing, cell phones etc) in Europe. Also used by GE Aircraft for research and analysis.
SORCER lab at Texas Tech has a large SOA architecture built on top of Jini/Javaspaces and you may be able to find some help there.
Thimmayya
2009-06-23 20:37:20
+1
A:
GigaSpaces is a mature version of JavaSpaces. It is widely used in financial applications, which are kept quiet.
As for the Implementation it is basically an transactional Object database on top of Jini. The queries are similar to db4o.
Clint
2009-06-23 20:45:31