hi all.
i would write a class singleton that encapsulate the entitymanagerFACTORY into it.(the entitymanagerFactory IS A property of the only instance of class singleton. (the class singleton is not a Ejb!!!!!!!!!).
into tomcat it not possible use ejbs.............
i have to manage the concurrency for the operations on db...............
with a method static i can get the only instance of singleton for manage all operation on database.
I get a instance of it into multiple servlet.
but into the class singleton i would write a set of method for the operation for example with serarch for name of a user, a search for a lastname, so way.
but i ask if all method it to be syncorniuzed into signature??????
for example:
public syncronized User searchForName(String name){
User user=null
//query for get the user correspondant.
return user;
}
public void syncronized updateUser(User userToUpdater){
//code for update into db }
but i ask if the metods for update, write . read , create Users it to be syncornized into signature or with the word syncornized form the body of the metods????
getr me please.........
i know that the servlet it multi.tread ad so the operation on db it not thread-safe.
but how it work the methods into singleton for read, update, write at db if 2 client it call the methods on mode concurrent?????
write me a example .
i wait for a response.
tank you
mauro.
