what do you mean its done at compile time? there is a post compilation step?
-Igor
On 12/13/05, Eduardo Rocha < [EMAIL PROTECTED]> wrote:
The binding is done at compile time, so those fields which are not
annotated behaves exactly the same way.
I had written before an aspect that injected at construction and at
deserialization, actually I don't remember why I switched to this
style, maybe because is much simpler.
2005/12/13, Igor Vaynberg <[EMAIL PROTECTED]>:
but even with @Before("get(@SpringBean * *)") you are still intercepting
every field access, and using reflection to check if the SpringBean
annotation is present. i am no aop expert, but that seems like overkill
to
me. i guess the proxy solution is really a cache to something like this.
you
do the lookup once, when you create the object, and then trade a small
hit
on your session size for cpu speed.
-Igor
On 12/13/05, Eduardo Rocha <[EMAIL PROTECTED]> wrote:
Yes, intercepting every field access could hit performance, but I
don't think can be a very serious issue:
@Before("get(@SpringBean * *)")
public void matchAnnotatedFields(JoinPoint thisJoinPoint) {
Concerning transient fields, there is a declare error on annotated
fields which are not transient:
@DeclareError("get(@wicket.contrib.spring.aspectj.SpringBean
!transient * *)")
public static final String MUST_BE_TRANSIENT = "SpringBean annotated "
+ "field must be transient.";
2005/12/13, Igor Vaynberg < [EMAIL PROTECTED]>:
that should work if you declare your fields transient. but what is
the
performance hit? youd have to intercept every field access no?
-Igor
On 12/13/05, Eduardo Rocha <[EMAIL PROTECTED] > wrote:
The semantic is "any time an annotated field is read, it is
checked to
see if it is null, and if it is, instantiate it". I think this is
OK
with this code, what do you think?
2005/12/13, Igor Vaynberg < [EMAIL PROTECTED]>:
hmm
what about stuff like this:
UserDetachableModel { long userid; private UserService svc;
transient
User
user; void attach() { user= svc.load(userid); }
new DetachableModel(10, userService); where userService is a
proxy
to
the
user service bean.
having these proxies means i can pass them into any object i
want
such
as a
detachable model or a data provider, and when those things are
serealized/deserialized there is no problem.
-Igor
On 12/13/05, Eduardo Rocha < [EMAIL PROTECTED]> wrote:
Igor,
As I said in another post, proxies are not needed with
AspectJ.
2005/12/13, Igor Vaynberg < [EMAIL PROTECTED]>:
have a look here
http://www.wicket-wiki.org.uk/wiki/index.php/Spring
this explains both integration strategies and why the
proxies
are
needed.
-Igor
On 12/13/05, Eduardo Rocha < [EMAIL PROTECTED]>
wrote:
You are right. I will look at the current implementation
to
see if
it
works like it is working for me.
2005/12/13, Igor Vaynberg < [EMAIL PROTECTED]>:
automatic injection is not the problem. the problem is
that
injected
dependencies cannot be serialized, thus the whole proxy
approach.
-Igor
On 12/13/05, Eduardo Rocha < [EMAIL PROTECTED] >
wrote:
Spring 2.0 will bring support to objects which are not
instantiated by
the container:
http://www.theserverside.com/news/thread.tss?thread_id=38047
Actually it is very similar with what I was doing,
except
that
the
article uses a prototype (template) object in
configuration,
while
I
am annotating each field, like wicket-contrib-spring
does.
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