Re: how to get reference of a session bean in Action
Ah in the examples I of course meant
eg request.getSession().getAttribute("userinfo");
and eg request.getSession().setAttribute("userinfo", userinfo);
Sorry I need more caffeine,
or more sleep, Menno
06/04/2001 17:13:12, Menno M Jansz <[EMAIL PROTECTED]> wrote:
>To access EJBs in your Action do a GetAttribute on the HttpSession ( eg
>request.getSession().getAttribute("userinfo"); ).
>
>1. If the return is null then this indicates it is the first time for this
>HttpSession, so do a lookup for the relevant ejb. When you
>have a reference to it do a SetAttribute on the HttpSession (eg
>request.getSession().setAttribute("servers", servers); )
>2. If the return is not null you have the reference to the ejb.
>
>Note the key here is that every client/user has has a unique HttpSession associated
>with it, via a unique session id. I think
>that's what you are getting confused about. So you can use to this HttpSession to
>store information for this user which you
can
>access across more than one page request.
>
>Hope that helps,
>
>Menno
>
>
>05/04/2001 13:26:03, "G.L. Grobe" <[EMAIL PROTECTED]> wrote:
>
>
>>If the life-span of an Action is only when that Action is being exec'd, and
>>I've created my session bean in this Action, and since this Action's
>>ActionForm class spans multiple pages, how do I grab the reference to that
>>session bean the next time that Action is exec'd? It seems a little odd to
>>have to give unique names to a setAttribute method (as any number of users
>>could jump on) and was wondering how else this might be done.
>>
>>Any help much appreciated.
>>
>
>
>
Re: how to get reference of a session bean in Action
To access EJBs in your Action do a GetAttribute on the HttpSession ( eg
request.getSession().getAttribute("userinfo"); ).
1. If the return is null then this indicates it is the first time for this
HttpSession, so do a lookup for the relevant ejb. When you
have a reference to it do a SetAttribute on the HttpSession (eg
request.getSession().setAttribute("servers", servers); )
2. If the return is not null you have the reference to the ejb.
Note the key here is that every client/user has has a unique HttpSession associated
with it, via a unique session id. I think
that's what you are getting confused about. So you can use to this HttpSession to
store information for this user which you can
access across more than one page request.
Hope that helps,
Menno
05/04/2001 13:26:03, "G.L. Grobe" <[EMAIL PROTECTED]> wrote:
>If the life-span of an Action is only when that Action is being exec'd, and
>I've created my session bean in this Action, and since this Action's
>ActionForm class spans multiple pages, how do I grab the reference to that
>session bean the next time that Action is exec'd? It seems a little odd to
>have to give unique names to a setAttribute method (as any number of users
>could jump on) and was wondering how else this might be done.
>
>Any help much appreciated.
>
how to get reference of a session bean in Action
I'm running this problem through again as I'm having a hard time figuring out how to use the setAttribute methods to keep track of a stateful session beans reference from within a struts Action class. If the life-span of an Action is only when that Action is being exec'd, and I've created my session bean in this Action, and since this Action's ActionForm class spans multiple pages, how do I grab the reference to that session bean the next time that Action is exec'd? It seems a little odd to have to give unique names to a setAttribute method (as any number of users could jump on) and was wondering how else this might be done. Any help much appreciated.
Re: session bean in action
Are any other EJBs working in Orion using that code? I don't use it, so I
can't say for sure, but this part looks suspect. Try importing
javax.rmi.PortableRemoteObject and using this instead:
Object ref = ctx.lookup("ConfigBuildBean");
ConfigBuildHome home = (ConfigBuildHome)
PortableRemoteObject.narrow(ref, ConfigBuildHome.class);
--
Dan Miser
http://www.distribucon.com
- Original Message -
From: "G.L. Grobe" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, March 29, 2001 9:02 PM
Subject: session bean in action
> I'm getting the error at the bottom and would like to know if there's
> anything special I need to do inside an Action. Server type is Orion
1.4.5.
>
> Context ctx = new InitialContext(env);
>
> ConfigBuildHome home = (ConfigBuildHome)
> ctx.lookup("ConfigBuildBean");
session bean in action
I'm getting the error at the bottom and would like to know if there's
anything special I need to do inside an Action. Server type is Orion 1.4.5.
ConfigBuildBean - Session Bean
ConfigBuildHome - EJBHome
ConfigBuild - EJBObject
-- ejb-jar.xml
Used in the configuration of new builds.
Build Configuration Session Bean
com.neuroquest.cais.ejb.config.ConfigBuildBean
com.neuroquest.cais.ejb.config.ConfigBuildBean
com.neuroquest.cais.ejb.config.ConfigBuildHome
com.neuroquest.cais.ejb.config.ConfigBuild
Stateless
Container
Session Bean Implementations --
public class NewAction extends Action
{
public ActionForward perform(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
// turn form instance into custom form bean.
NewForm newForm = (NewForm) form;
//String viewName = newForm.getView();
String initCtxFactory =
getInitParameter(Context.INITIAL_CONTEXT_FACTORY);
String providerURL = getInitParameter(Context.PROVIDER_URL);
try {
Properties env = System.getProperties();
env.put(Context.INITIAL_CONTEXT_FACTORY, initCtxFactory);
env.put(Context.PROVIDER_URL, providerURL);
Context ctx = new InitialContext(env);
ConfigBuildHome home = (ConfigBuildHome)
ctx.lookup("ConfigBuildBean");
ConfigBuild cfgBuild = home.create();
cfgBuild.saveConfig();
}
catch (Exception e) {
log(e);
e.printStackTrace();
}
...
- The Error --
cassia(root):/u/public/orion# java -jar orion.jar
Auto-unpacking /u/build/release/cais.ear... done.
Auto-deploying cais-ejb.jar (ejb-jar.xml had been touched since the previous
deployment)... done.
Orion/1.4.5 initialized
javax.naming.NameNotFoundException: ConfigBuildHome not found
at com.evermind.server.rmi.RMIContext.lookup(JAX, Compiled Code)
at com.evermind.server.hm.f4(JAX, Compiled Code)
at com.evermind.server.hm.lookup(JAX, Compiled Code)
at javax.naming.InitialContext.lookup(InitialContext.java, Compiled
Code)
at com.neuroquest.cais.actions.NewAction.perform(NewAction.java,
Compiled Code)
at
org.apache.struts.action.ActionServlet.processActionPerform(ActionServlet.ja
va, Compiled Code)
at
org.apache.struts.action.ActionServlet.process(ActionServlet.java, Compiled
Code)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java,
Compiled Code)
at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
at com.evermind.server.http.d3.sw(JAX, Compiled Code)
at com.evermind.server.http.d3.su(JAX, Compiled Code)
at com.evermind.server.http.ef.s1(JAX, Compiled Code)
at com.evermind.server.http.ef.do(JAX, Compiled Code)
at com.evermind.util.f.run(JAX, Compiled Code)
Re: init'ing a session bean in Action
what you have to lookup is the jndi name. I am using Weblogic and I have
a weblogic-ejb-jar.xml where you say the name you want to put to EJB in
jndi directory.
namexxx
ConfigHome home = (ConfigHome) ctx.lookup("namexxx");
Bye
> "G.L. Grobe" wrote:
>
> Probably not the right group and I'm new to ejb's and am having a
> problem getting a sesson bean going from within an Action class (a
> class from the apache struts framework which probably doesn't make a
> difference what the class is). Is this on the right track to doing
> this correctly, though I get the following error.
>
> javax.naming.NameNotFoundException: ConfigHome not found
> at com.evermind.server.rmi.RMIContext.lookup(JAX, Compiled
> Code)
> at com.evermind.server.hm.f4(JAX, Compiled Code)
> at com.evermind.server.hm.lookup(JAX, Compiled Code)
> at javax.naming.InitialContext.lookup(InitialContext.java,
> Compiled Code)
> My Sesson bean is made up of the following:
> ConfigHome - home interface
> ConfigBean - session bean
> Config - ejbobject interface
>
> My ejb-jar.xml file looks like this.
>
>
> Configuration Session Bean
> com.neuroquest.cais.ejb.config.Config
> com.neuroquest.cais.ejb.config.ConfigHome
> com.neuroquest.cais.ejb.config.Config
>
> com.neuroquest.cais.ejb.config.ConfigBean
> Stateless
>
>
>
> Any help much appreciated.
>
> --
> public ActionForward perform(ActionMapping mapping, ActionForm form,
> HttpServletRequest request, HttpServletResponse response) {
>
> String initCtxFactory =
> getInitParameter(Context.INITIAL_CONTEXT_FACTORY);
> String providerURL = getInitParameter(Context.PROVIDER_URL);
>
> try {
>
> Properties env = System.getProperties();
> env.put(Context.INITIAL_CONTEXT_FACTORY, initCtxFactory);
> env.put(Context.PROVIDER_URL, providerURL);
>
> Context ctx = new InitialContext(env);
>
> ConfigHome home = (ConfigHome) ctx.lookup("ConfigHome");
>
> ConfigBean cfgBean = home.create();
> cfgBean.doMyMethod();
> }
> catch (Exception e) {
> log(e);
> e.printStackTrace();
> }
>
>
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init'ing a session bean in Action
Probably not the right group and I'm new to ejb's and am having a problem
getting a sesson bean going from within an Action class (a class from the apache
struts framework which probably doesn't make a difference what the class is). Is
this on the right track to doing this correctly, though I get the following
error.
javax.naming.NameNotFoundException: ConfigHome not
found at
com.evermind.server.rmi.RMIContext.lookup(JAX, Compiled
Code) at
com.evermind.server.hm.f4(JAX, Compiled
Code) at
com.evermind.server.hm.lookup(JAX, Compiled
Code) at
javax.naming.InitialContext.lookup(InitialContext.java, Compiled Code)
My Sesson bean is made up of the following:ConfigHome - home
interfaceConfigBean - session beanConfig - ejbobject interface
My ejb-jar.xml file looks like this.
Configuration Session
Bean
com.neuroquest.cais.ejb.config.Config
com.neuroquest.cais.ejb.config.ConfigHome
com.neuroquest.cais.ejb.config.Config
com.neuroquest.cais.ejb.config.ConfigBean
Stateless
Any help much appreciated.
-- public ActionForward
perform(ActionMapping mapping, ActionForm
form, HttpServletRequest
request, HttpServletResponse response) {
String initCtxFactory =
getInitParameter(Context.INITIAL_CONTEXT_FACTORY);
String providerURL = getInitParameter(Context.PROVIDER_URL);
try
{
Properties env =
System.getProperties();
env.put(Context.INITIAL_CONTEXT_FACTORY,
initCtxFactory);
env.put(Context.PROVIDER_URL, providerURL);
Context ctx = new
InitialContext(env);
ConfigHome home =
(ConfigHome) ctx.lookup("ConfigHome");
ConfigBean cfgBean =
home.create();
cfgBean.doMyMethod();
} catch (Exception e)
{
log(e);
e.printStackTrace(); }
