Re: how to access JSF Managed Bean in Struts Action class
Craig McClanahan wrote: Managed beans are no different than any other beans with respect to scopes: * Managed beans in request scope will be created on demand once for every request * Managed beans in session scope will be created on demand once for every session * Managed beans in application scope will be created on demand once for the lifetime of the application. If you are caching things that are shared between users, put them in application scope instead. If the cached data is unique per user, then you're going to need to leave it in session scope. Craig Thank Craig. I must be too involved NOT to think that way. Thanks a million. BaTien DBGROUPS On Tue, 21 Sep 2004 13:45:58 -0600, BaTien Duong <[EMAIL PROTECTED]> wrote: Craig McClanahan wrote: On Mon, 20 Sep 2004 08:41:55 -0600, BaTien Duong <[EMAIL PROTECTED]> wrote: Just 2 quick questions from expert advise. Assuming FooBean is initialized by Faces in the session: 1) Under what cirscunstances we shoud use Faces or directly accessing the component under user session, assuming that you also use faces with other framework such as Tiles? I'm not quite sure what you are referring to, but it's quite straightforward to reference properties from a session-scoped bean. For example, assume "user" is a UserProfileBean and has a name property. You can use expressions like this: Hello Note that it doesn't matter whether the bean was created by the managed beans facility or via programmatic logic (say, being placed there by an Action), so it is very straightforward to interoperate. 2) If FooBean is a default user profile bean, does faces have some kind of caching so it can just replicate the default configuration of the user profile for every created user session? If the caching is not a part of spec then which implementation (RI or myfaces) has it? You can specify initial values for the properties of a managed bean by using elements nested inside: user com.mycompany.UserProfileBean session userType java.lang.String Standard The content of the element can be either a literal value or a value binding expression, so you can have your initialization grab dynamically calculated values if you need them. Craig Thank Craig. I am fully aware of these features, but found the loading is slow. I have not investigated whether faces implementations have some caching mechanism so it does not need to create the session managed beans from the scratch for every new user. My question is whether the RI and/or my faces have some caching mechanism to speed up the process. If it does not then it is worth while to programmatically create these beans from our own cache implementation. Once the beans with identical attribute names are available in the session then faces does not have to create them. I am trying to decide which approach we should take. Your further insight information may save us some time. Thank again BaTien DBGROUPS - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how to access JSF Managed Bean in Struts Action class
Managed beans are no different than any other beans with respect to scopes: * Managed beans in request scope will be created on demand once for every request * Managed beans in session scope will be created on demand once for every session * Managed beans in application scope will be created on demand once for the lifetime of the application. If you are caching things that are shared between users, put them in application scope instead. If the cached data is unique per user, then you're going to need to leave it in session scope. Craig On Tue, 21 Sep 2004 13:45:58 -0600, BaTien Duong <[EMAIL PROTECTED]> wrote: > > > Craig McClanahan wrote: > > >On Mon, 20 Sep 2004 08:41:55 -0600, BaTien Duong > ><[EMAIL PROTECTED]> wrote: > > > > > >>Just 2 quick questions from expert advise. Assuming FooBean is > >>initialized by Faces in the session: > >> > >> > > > > > > > >> 1) Under what cirscunstances we shoud use Faces or directly > >>accessing the component under user session, assuming that you also use > >>faces with other framework such as Tiles? > >> > >> > > > >I'm not quite sure what you are referring to, but it's quite > >straightforward to reference properties from a session-scoped bean. > >For example, assume "user" is a UserProfileBean and has a name > >property. You can use expressions like this: > > > >Hello > > > >Note that it doesn't matter whether the bean was created by the > >managed beans facility or via programmatic logic (say, being placed > >there by an Action), so it is very straightforward to interoperate. > > > > > > > >>2) If FooBean is a default user profile bean, does faces have some > >>kind of caching so it can just replicate the default configuration of > >>the user profile for every created user session? If the caching is not a > >>part of spec then which implementation (RI or myfaces) has it? > >> > >> > > > >You can specify initial values for the properties of a managed bean by > >using elements nested inside: > > > > > >user > >com.mycompany.UserProfileBean > >session > > > > userType > > java.lang.String > > Standard > > > > > > > >The content of the element can be either a literal value or a > >value binding expression, so you can have your initialization grab > >dynamically calculated values if you need them. > > > >Craig > > > > > > > Thank Craig. I am fully aware of these features, but found the loading > is slow. I have not investigated whether faces implementations have some > caching mechanism so it does not need to create the session managed > beans from the scratch for every new user. > > My question is whether the RI and/or my faces have some caching > mechanism to speed up the process. If it does not then it is worth while > to programmatically create these beans from our own cache > implementation. Once the beans with identical attribute names are > available in the session then faces does not have to create them. I am > trying to decide which approach we should take. > > Your further insight information may save us some time. > > Thank again > > BaTien > DBGROUPS > > > > >- > >To unsubscribe, e-mail: [EMAIL PROTECTED] > >For additional commands, e-mail: [EMAIL PROTECTED] > > > >. > > > > > > > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how to access JSF Managed Bean in Struts Action class
Craig McClanahan wrote: On Mon, 20 Sep 2004 08:41:55 -0600, BaTien Duong <[EMAIL PROTECTED]> wrote: Just 2 quick questions from expert advise. Assuming FooBean is initialized by Faces in the session: 1) Under what cirscunstances we shoud use Faces or directly accessing the component under user session, assuming that you also use faces with other framework such as Tiles? I'm not quite sure what you are referring to, but it's quite straightforward to reference properties from a session-scoped bean. For example, assume "user" is a UserProfileBean and has a name property. You can use expressions like this: Hello Note that it doesn't matter whether the bean was created by the managed beans facility or via programmatic logic (say, being placed there by an Action), so it is very straightforward to interoperate. 2) If FooBean is a default user profile bean, does faces have some kind of caching so it can just replicate the default configuration of the user profile for every created user session? If the caching is not a part of spec then which implementation (RI or myfaces) has it? You can specify initial values for the properties of a managed bean by using elements nested inside: user com.mycompany.UserProfileBean session userType java.lang.String Standard The content of the element can be either a literal value or a value binding expression, so you can have your initialization grab dynamically calculated values if you need them. Craig Thank Craig. I am fully aware of these features, but found the loading is slow. I have not investigated whether faces implementations have some caching mechanism so it does not need to create the session managed beans from the scratch for every new user. My question is whether the RI and/or my faces have some caching mechanism to speed up the process. If it does not then it is worth while to programmatically create these beans from our own cache implementation. Once the beans with identical attribute names are available in the session then faces does not have to create them. I am trying to decide which approach we should take. Your further insight information may save us some time. Thank again BaTien DBGROUPS - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] . - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how to access JSF Managed Bean in Struts Action class
On Mon, 20 Sep 2004 08:41:55 -0600, BaTien Duong <[EMAIL PROTECTED]> wrote: > > Just 2 quick questions from expert advise. Assuming FooBean is > initialized by Faces in the session: > 1) Under what cirscunstances we shoud use Faces or directly > accessing the component under user session, assuming that you also use > faces with other framework such as Tiles? I'm not quite sure what you are referring to, but it's quite straightforward to reference properties from a session-scoped bean. For example, assume "user" is a UserProfileBean and has a name property. You can use expressions like this: Hello Note that it doesn't matter whether the bean was created by the managed beans facility or via programmatic logic (say, being placed there by an Action), so it is very straightforward to interoperate. > 2) If FooBean is a default user profile bean, does faces have some > kind of caching so it can just replicate the default configuration of > the user profile for every created user session? If the caching is not a > part of spec then which implementation (RI or myfaces) has it? You can specify initial values for the properties of a managed bean by using elements nested inside: user com.mycompany.UserProfileBean session userType java.lang.String Standard The content of the element can be either a literal value or a value binding expression, so you can have your initialization grab dynamically calculated values if you need them. Craig - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: how to access JSF Managed Bean in Struts Action class
Craig McClanahan wrote:
On Sun, 19 Sep 2004 15:44:14 +0530, ravi naraharasetty
<[EMAIL PROTECTED]> wrote:
Hi All,
How do I access JSF Managed Bean which is in session scope into a
Struts Action Class.
Assume you have a managed bean named "foo" that you'd like to access,
of type FooBean.
FacesContext fc = FacesContext.getCurrentInstance();
ValueBinding vb = fc.getApplication().createValueBinding("#{foo}");
FooBean foo = (FooBean) vb.getValue(fc);
Since you have "foo" defined as a managed bean, it will be
instantiated on demand if necessary.
Besides simple expressions like this, you can programmatically
evaluate any legal value binding expression using the technique above.
In addition, value bindings can be used to modify things as well --
if FooBean has a String property named "name", then you can update it
like this:
FacesContext fc = FacesContext.getCurrentInstance();
ValueBinding vb = fc.getApplication().createValueBinding("#{foo.name}");
vb.setValue(fc, "New value for the name");
Hello Craig:
Just 2 quick questions from expert advise. Assuming FooBean is
initialized by Faces in the session:
1) Under what cirscunstances we shoud use Faces or directly
accessing the component under user session, assuming that you also use
faces with other framework such as Tiles?
2) If FooBean is a default user profile bean, does faces have some
kind of caching so it can just replicate the default configuration of
the user profile for every created user session? If the caching is not a
part of spec then which implementation (RI or myfaces) has it?
Thanks.
BaTien
DBGROUPS
Thanks & Regards,
Kumar.
Craig
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Re: how to access JSF Managed Bean in Struts Action class
On Sun, 19 Sep 2004 15:44:14 +0530, ravi naraharasetty
<[EMAIL PROTECTED]> wrote:
> Hi All,
>
> How do I access JSF Managed Bean which is in session scope into a
> Struts Action Class.
>
Assume you have a managed bean named "foo" that you'd like to access,
of type FooBean.
FacesContext fc = FacesContext.getCurrentInstance();
ValueBinding vb = fc.getApplication().createValueBinding("#{foo}");
FooBean foo = (FooBean) vb.getValue(fc);
Since you have "foo" defined as a managed bean, it will be
instantiated on demand if necessary.
Besides simple expressions like this, you can programmatically
evaluate any legal value binding expression using the technique above.
In addition, value bindings can be used to modify things as well --
if FooBean has a String property named "name", then you can update it
like this:
FacesContext fc = FacesContext.getCurrentInstance();
ValueBinding vb = fc.getApplication().createValueBinding("#{foo.name}");
vb.setValue(fc, "New value for the name");
> Thanks & Regards,
> Kumar.
Craig
-
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