10 Replies Latest reply on Mar 10, 2011 11:44 AM by liuliu

Help with getExternalContext()

basharf Mar 9, 2011 6:51 PM

Hello all,

I have this issue..

<h:commandLink name="Table Data" actionListener="#{tabTest.getValues}" value="Table Data"/>

then I said to myself ..

I want to change it to a4j:commandLink...

so I put this...

<a4j:commandLink action="#{tabTest.getValues}" ajaxSingle="true" value="get results" reRender="taskList"/>

now in the bean ..

in the getValues method...

I have this

UserBean userBean = (UserBean) FacesContext.getCurrentInstance().getExternalContext().getRequestMap().get("userBean");

it used to work when I used the <h:commandLink .. I can get the bean instance ...

but when I changed to the <a4j:commandLink ...

I cannot get the bean... it is NULL .. I dont know why .. weird...

can any 1 explain please ??

Please HELP

thanks

1. Help with getExternalContext()

liuliu Mar 10, 2011 3:06 AM (in response to basharf)

hi,
ajaxsingle maybe the problem.
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2. Help with getExternalContext()

nbelaevski Mar 10, 2011 3:17 AM (in response to basharf)

Hi,

JSF beans are lazily evaluated, so evidently if you use ajax-single component userBean is not being called, thus it's missing in request. Why don't you inject it into tabTest instead of taking it from request map?
1 of 1 people found this helpful
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3. Re: Help with getExternalContext()

basharf Mar 10, 2011 5:12 AM (in response to nbelaevski)

Thanks a lot for the reply ...

but this is really important .. could you please tell me how .. maybe I am doing things in the wrong way..

Thanks a lot again..
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4. Help with getExternalContext()

basharf Mar 10, 2011 5:48 AM (in response to nbelaevski)

it seems I am doing it the wrong way .. how can I do it please ?

please help.. Thanks a lot
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5. Help with getExternalContext()

ilya_shaikovsky Mar 10, 2011 6:01 AM (in response to basharf)

1) remove ajaxSingle
or
2) inject using managed property instead of getting from request map.
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6. Help with getExternalContext()

basharf Mar 10, 2011 6:13 AM (in response to ilya_shaikovsky)

Thank you so much Ilya ..

how can I do step 2 please ?
2) inject using managed property instead of getting from request map.

I thought that this is what I did ... ??
please help

thanks.
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7. Help with getExternalContext()

basharf Mar 10, 2011 7:27 AM (in response to basharf)

any one ? I tried googling .. no clear example ..

Thanks.
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8. Help with getExternalContext()

liuliu Mar 10, 2011 8:04 AM (in response to basharf)

hi,

can you switch your userbean to session scope?
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9. Help with getExternalContext()

basharf Mar 10, 2011 8:44 AM (in response to liuliu)

hi Liumin..

actually it is really big object .. I dont want to cache it in the session

thanks
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10. Re: Help with getExternalContext()

liuliu Mar 10, 2011 11:44 AM (in response to basharf)

hi,
this is injection with managed-property in your faces-config.xml
<managed-property>
<property-name>userBean</property-name>
<property-class>class.path.UserBean</property-class>
<value>#{userBean}</value>
</managed-property>
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