[JDBC] How to find what Java program has a transaction open?

I got the following query from a comment on the PostgreSQL site:

select pg_stat_activity.datname,pg_class.relname,pg_locks.transaction, pg_locks.mode,pg_locks.granted,pg_stat_activity.usename,substr(pg_stat_activity.current_query,1,30), pg_stat_activity.query_start, age(now(),pg_stat_activity.query_start) as
"age", pg_stat_activity.procpid from pg_stat_activity,pg_locks left outer join
pg_class on (pg_locks.relation = pg_class.oid) where pg_locks.pid=pg_stat_activity.procpid and pg_class.relname not like 'pg_%' order by query_start;

and it's great, in that it shows me what Postgres PID is holding the lock, and on what table. But what I don't know is how to figure out what Java program it is that's got the lock. If I do a "ps auwwx | grep [pid]", the socket number will be part of the command line for that process, and then I can use
"lsof -i :[socketnumber]" which shows me two tasks that have that socket open,
the PostgreSQL task and the Java task, and then I can use "ps auwwx | grep [pid]" to find the arguments to the Java task, including the main class.

Is there a more direct way?

-- 
Paul Tomblin <
ptomblin(at)xcski.com> 
http://blog.xcski.com/
Compared to system administration, being cursed forever is a step up.
               -- Paul Tomko

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