Hello everyone,
We are using GWT 2.5.1, Hibernate 4.x as a JPA 2.x provider, Oracle
database 11g, and RequestFactory for our application. One of the areas of
our application is slightly slow at read time and is noticeably slower at
write time. The use case in particular is a fairly complex editor where the
read part of the puzzle is used to render the complex UI and the write part
of the puzzle is used to save end user edits made in this complex editor
UI. In this particular use case, we use RequestFactory. In other areas of
our application we have some GWT-RPC in use, but we are migrating away from
its use in favor of using RequestFactory.
In our RequestFactory use, we use the ServiceLocator pattern and our
ServiceLocator's unconditionally return true from isLive(), for background
information. We are not using the Editor framework in this area of the
application.
We have been working on this set of use cases some time and are quite
comfortable with the Domain Model that we have in place, which to simplify
looks like the following :
class A
|
-- class B
|
-- class C
|
-- class D
|
-- class E
|
-- class E1
|
-- class E2
|
-- class E3
There are OneToMany relationships between the following classes : A -> B, B
-> C, C-> D, D-> E, E -> E1, E -> E2, E -> E3, with back pointing ManyToOne
relationships throughout. Each of these classes are not transportable, in
the RequestFactory sense, so we have an EntityProxy for each class.
When an end user saves their edits, lots of db query traffic can be seen,
which appears to be due to hydrating the entire graph of objects and
stitching them together. I suspect that we could reduce the system response
time of the save/write use case if all of this ServiceLocator find()
infrastructure was subverted since once we read/find the A instance, it can
be used to apply all edits without a find() call per node in the graph.
Have any of you faced this type of problem and were you able to find an
implementation alternative which proved faster by using maybe GWT-JSON or
GWT-RPC or some other means?
If you got here, thanks for reading and your replies in advance.
Doug
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