[Remoting] - need general feedback on remoting and whether jboss remoting
by geeky2
hello everyone,
we are relatively new to jboss and are trying to decide if jboss and remoting are appropriate for our new application.
we are staring to map out the architecture for a new application that will communicate with WI-FI clocks. the communication is all socket based.
essentially the "conversation" between the new application (we call is the LC - local concentrator") and the clocks - is a socket based, syncronous dialog where byte streams are passed back and forth. there will be some database lookups and inserts.
the number of clocks will vary - but it is likely that there will be 300 - 2000 clocks all talking to the LC at intervals of 1 - 4 times per day.
it would be great if i could gain some general architectural input and or some examples from people that may be using jboss in a similar environemtn.
some of our hesitation (from going forward with jboss) is that our particular use case - does not resemble the typical e-commerce environment that you see in so many places.
any help or feedback would be apprecated.
thx
mark
View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4067222#4067222
Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4067222
18Â years, 9Â months
[JBoss Seam] - Re: count(*) and group by
by wschwendt
While we are at it:
Is COUNT(*) valid anyway, according to JSR 220/EJB Persistence specification V.3.0???
Interestingly, the Seam approach to generate the count query works if the query has no GROUP BY clause. But it doesn't look like a legal EJBQL expression according to the EJBQL BNF grammar.
Is COUNT(*) missing in the JSR 220 specification?
select_clause ::= SELECT [DISTINCT] select_expression {,select_expression}*
select_expression ::=
single_valued_path_expression |
aggregate_expression |
identification_variable |
OBJECT(identification_variable)
aggregate_expression ::=
{ AVG | MAX | MIN | SUM } ([DISTINCT] state_field_path_expression) |
COUNT ([DISTINCT] identification_variable | state_field_path_expression |
single_valued_association_path_expression)
state_field_path_expression ::=
{identification_variable | single_valued_association_path_expression}.state_field
single_valued_association_path_expression ::=
identification_variable.{single_valued_association_field.}* single_valued_association_field
View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4067219#4067219
Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4067219
18Â years, 9Â months