Is a Web Services "conversation" a Stateful EJB?

Is a Web Services "conversation" a Stateful EJB?
Or is this implementation geared more to conversations
that could span days or weeks?
Thanks, -- pl

Paul,
Good question. A conversation is backed up by an entity bean whose
state is persisted. It will, therefore be maintained across WebLogic
server restarts and will last as long as the application needs it to.
Gordon O'Gorman
BEA Systems
Developer Relations Engineer
======
Paul Loubriel wrote:
Is a Web Services "conversation" a Stateful EJB?
Or is this implementation geared more to conversations
that could span days or weeks?
Thanks, -- pl

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Web Service-Client for stateful session EJB container

Do you know, how to write a Web Service-Client to connect a stateful session EJB container?
A stateful session EJB container ist created with Web Logic 8.1.
Message was edited by n.t.c at Dec 14, 2004 6:09 AM

Pedja thanks for reply.
I still dont understand what is wrong with my example.
The first peace of the code i wrote (getting the reference to the remote interface object) works pretty well, and even more it is produced automatically by JDeveloper, so why we cant get a reference to the local interface object the same way?
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Thanks. Alex.

Oracle Web Services Manager and Stateful Services

Hi,
I was wondering if anybody could help or provide guidance on stateful web services and the OWSM.
I've registered a stateful web service with the OWSM. I also selected the "Keep-Alive" option as well, but this prob. doesn't pertain to stateful web services. But it doesn't seem to register the fact that its a stateful web service. When I call it, I have a packet analyzer that looks at the TCP trace and no Session id is sent back in the headers on the client side, which is on a separate box. Obviously, running it directly with Java and Axis works fine.
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On OTN, documentation library. Search for Oracle Web Service Manager and there you will see the Extensibility Guide.
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Hello Community-Folks,
i have developed an EJB which already uses KM-Webservices to interact from my NW 7.1 CE App-Server (SP5) with out KM on an NW 7.0 (where our Portal also runs on).
For using the KM-WebService i have to authenticate to the KM. At the moment i use the following code to connect and authenticate
rf = new RepositoryFrameworkWS(wsdlUrl, new QName(this.Default_QNSUri,this.Default_QNSLPart));
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Hi,
And Could we know how you manage this?
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Edited by: Xavier Tendron on Oct 19, 2009 3:23 PM

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Hi,
Does anyone know if you can Can you change the table-name attribute of
the conversation-state-table element in the wlw-manifest.xml file?
It seems like you can (the file is in the project) but the build process
overlays any and all changes.
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No. If you want to continue to use workshop, any changes made to this file
will be overwritten in your next build. Otherwise, your going to have to
write your own ant script and use it every time. It doesn't make any sense
to change these names. They are just system table type names. They are
created when you bring the server up in debug mode.
I would think a DBA would know a way to take a table name and just make it a
reference to the actual table name if he really wanted to do this.
"Tom Adams" <[email protected]> wrote in message
news:[email protected]..
Hi,
Does anyone know if you can Can you change the table-name attribute of
the conversation-state-table element in the wlw-manifest.xml file?
It seems like you can (the file is in the project) but the build process
overlays any and all changes.
What I would like to do is name the state table something different in
the database (well, actually the DBAs want to use a different name).
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Tom

Conversational web services - stateful session bean in WLS9/10?

hello,
are conv web services compiled into stateful sb still?
thanks,
B.

so the conv state is in a http session, that will be replicated when running in a cluster?
thanks for this helpful information,
B.

Test web service proxy using EJB session bean client...

Hello!
I am following this blog /people/abdelmorhit.elrhazi/blog/2009/10/30/how-to-consume-an-inbound-backend-web-service-in-nwdsjboss-environment to create a EJB session bean client to access the web service proxy...
The blog is not very clear. Where should I be deploying the web service proxy and the EJB session bean (web service client) ? on the PI 7.1 ?
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Thanks

> The blog is not very clear. Where should I be deploying the web service proxy and the EJB session bean (web service client) ? on the PI 7.1 ?
"To deploy your web service proxy and session bean, right click on your JBoss server in the Servers view, and click on Add Remove Projects, add you ear file and click finish."
You need a JBoss server.

Error during JNDI lookup Accessing Remote EJB (access to web service restricted using declarative security model)

Hello everyone,
I developed a Web Service prototype accessing remote EJB using the EJB
control with special syntax in the jndi-name attribute: @jws:ejb
home-jndi-name="t3://10.10.245.70:7131/AccountDelegatorEJB"
Everything works fine, but I get an error when I restrict access to my web
service with a declarative security model by implementing steps provided in
help doc:
- Define the web resource you wish to protect
- Define which security role is required to access the web resource
- Define which users are granted the required security role
- Configure WebLogic Server security for my web service(Compatibility
Security/Users)
I launch the service by entering the address in a web browser. When prompted
to accept the digital certificate, click Yes, when prompted for network
authentication information, enter username and password, navigate to the
Test Form tab of Test View, invoke the method by clicking the button and I
get the following exception:
<error>
<faultcode>JWSError</faultcode>
<faultstring>Error during JNDI lookup from
jndi:t3://10.10.245.70:7131/AccountDelegatorEJB[Lookup failed for
name:t3://10.10.245.70:7131/AccountDelegatorEJB]</faultstring>
<detail>
<jwErrorDetail> weblogic.jws.control.ControlException: Error during JNDI
lookup from jndi:t3://10.10.245.70:7131/AccountDelegatorEJB[Lookup failed
for name:t3://10.10.245.70:7131/AccountDelegatorEJB] at
weblogic.knex.control.EJBControlImpl.acquireResources(EJBControlImpl.java:27
8) at
weblogic.knex.context.JwsInternalContext.acquireResources(JwsInternalContext
.java:220) at
weblogic.knex.control.ControlHandler.invoke(ControlHandler.java:260) at
ibas.AccountControl.getTransactionHistory(AccountControl.ctrl) at
ibas.GetSecure.retrieveVisaHistoryTxn(GetSecure.jws:64) </jwErrorDetail>
</detail>
</error>
I have a simple Hello method as well in my WebService (which is also
restricted) and it works fine, but remote EJB access doesn't. I tested my
prototype on Weblogic 7.2 and 8.1 platforms - same result.
Is that a bug or I am missing some additional configuration in order to get
that working. Has anyone seen similar behavior? Is there a known resolution?
Or a suggested way to work around the problem?
Thank you.
Andre

Andre,
It would be best if this issue is handled as an Eval Support case. Please
BEA Customer Support at http://support.beasys.com along with the required
files, and request that an Eval support case be created for this issue.
Thanks
Raj Alagumalai
WebLogic Workshop Support
"Andre Shergin" <[email protected]> wrote in message
news:[email protected]...
Anurag,
I removed "t3", still get an error but a different one (Unable to create
InitialContext:null):
<error>
<faultcode>JWSError</faultcode>
<faultstring>Error during JNDI lookup from
jndi://secuser1:[email protected]:7131/AccountDelegatorEJB[Unable to
create InitialContext:null]</faultstring>
<detail>
<jwErrorDetail> weblogic.jws.control.ControlException: Error during JNDI
lookup from
jndi://secuser1:[email protected]:7131/AccountDelegatorEJB[Unable to
create InitialContext:null] at
weblogic.knex.control.EJBControlImpl.acquireResources(EJBControlImpl.java:27
8) at
weblogic.knex.context.JwsInternalContext.acquireResources(JwsInternalContext
.java:220) at
weblogic.knex.control.ControlHandler.invoke(ControlHandler.java:260) at
ibas.AccountControl.getTransactionHistory(AccountControl.ctrl) at
ibas.GetVisaHistoryTransactions.getVisaHistoryTxn(GetVisaHistoryTransactions
.jws:67) </jwErrorDetail>
</detail>
</error>
Note: inter-domain communication is configured properly. The Web Service to
remote EJB works fine without a declarative security.
Any other ideas?
Thank you for your help.
Andre
"Anurag" <[email protected]> wrote in message
news:[email protected]...
Andre,
It seems you are using the URL
jndi:t3://secuser1:[email protected]:7131/AccountDelegatorEJB
whereas you should not be specifying the "t3:" protocol.
The URL should be like
jndi://secuser1:[email protected]:7131/AccountDelegatorEJB
Please do let me know if you see any issues with this.
Note that this will only allow you to access remote EJBs in the same WLS
domain. For accessing EJBs on another domain, you need to configure
inter-domain communication by
following a few simple steps as mentioned at
http://e-docs.bea.com/wls/docs81/ConsoleHelp/jta.html#1106135. This link has
been provided in the EJB Control Workshop documentation.
Regards,
Anurag
"Andre Shergin" <[email protected]> wrote in message
news:[email protected]...
Raj,
I tried that before, it didn't help. I got similar error message:
<error>
<faultcode>JWSError</faultcode>
<faultstring>Error during JNDI lookup from
jndi:t3://secuser1:[email protected]:7131/AccountDelegatorEJB[Lookup
failed for
name:t3://secuser1:[email protected]:7131/AccountDelegatorEJB]</faultstr
ing>
<detail>
<jwErrorDetail> weblogic.jws.control.ControlException: Error during JNDI
lookup from
jndi:t3://secuser1:[email protected]:7131/AccountDelegatorEJB[Lookup
failed for
name:t3://secuser1:[email protected]:7131/AccountDelegatorEJB] at
weblogic.knex.control.EJBControlImpl.acquireResources(EJBControlImpl.java:27
8) at
weblogic.knex.context.JwsInternalContext.acquireResources(JwsInternalContext
.java:220) at
weblogic.knex.control.ControlHandler.invoke(ControlHandler.java:260) at
ibas.AccountControl.getTransactionHistory(AccountControl.ctrl) at
ibas.GetSecure.retrieveVisaHistoryTxn(GetSecure.jws:64) </jwErrorDetail>
</detail>
</error>
Anything else should I try?
P.S. AccountDelegatorEJB, the remote EJB my Web Service calls is NOTaccess
restricted.
I hope there is a solution.
Thanks,
Andre
"Raj Alagumalai" <[email protected]> wrote in message
news:[email protected]...
Andre,
Can you try using the following url with username and password
jndi://username:password@host:7001/my.resource.jndi.object ?
once you add webapp level security, the authenticated is the user who
invokes the EJB.
http://e-docs.bea.com/workshop/docs81/doc/en/workshop/guide/controls/ejb/con
CreatingANewEJBControl.html?skipReload=true
has more info on using remote EJB's.
Hope this helps.
Thanks
Raj Alagumalai
WebLogic Workshop Support
"Alla Resnik" <[email protected]> wrote in message
news:[email protected]...
Hello everyone,
I developed a Web Service prototype accessing remote EJB using the EJB
control with special syntax in the jndi-name attribute: @jws:ejb
home-jndi-name="t3://10.10.245.70:7131/AccountDelegatorEJB"
Everything works fine, but I get an error when I restrict access to my
web
service with a declarative security model by implementing steps
provided
in
help doc:
- Define the web resource you wish to protect
- Define which security role is required to access the web resource
- Define which users are granted the required security role
- Configure WebLogic Server security for my web service(Compatibility
Security/Users)
I launch the service by entering the address in a web browser. Whenprompted
to accept the digital certificate, click Yes, when prompted for
network
authentication information, enter username and password, navigate tothe
Test Form tab of Test View, invoke the method by clicking the buttonand
I
get the following exception:
<error>
<faultcode>JWSError</faultcode>
<faultstring>Error during JNDI lookup from
jndi:t3://10.10.245.70:7131/AccountDelegatorEJB[Lookup failed for
name:t3://10.10.245.70:7131/AccountDelegatorEJB]</faultstring>
<detail>
<jwErrorDetail> weblogic.jws.control.ControlException: Error during
JNDI
lookup from jndi:t3://10.10.245.70:7131/AccountDelegatorEJB[Lookupfailed
for name:t3://10.10.245.70:7131/AccountDelegatorEJB] at
weblogic.knex.control.EJBControlImpl.acquireResources(EJBControlImpl.java:27
8) at
weblogic.knex.context.JwsInternalContext.acquireResources(JwsInternalContext
.java:220) at
weblogic.knex.control.ControlHandler.invoke(ControlHandler.java:260)at
ibas.AccountControl.getTransactionHistory(AccountControl.ctrl) at
ibas.GetSecure.retrieveVisaHistoryTxn(GetSecure.jws:64)</jwErrorDetail>
</detail>
</error>
I have a simple Hello method as well in my WebService (which is also
restricted) and it works fine, but remote EJB access doesn't. I testedmy
prototype on Weblogic 7.2 and 8.1 platforms - same result.
Is that a bug or I am missing some additional configuration in order
to
get
that working. Has anyone seen similar behavior? Is there a knownresolution?
Or a suggested way to work around the problem?
Thank you.
Andre

Q: General : When will you use Web Service as opposed to just Servlet and/or EJB?

Hi,
I don't know if this is an appropriate question to ask for this class as it's not
workshop
specific. I was wondering how will I decide when it is appropriate to use a web
service as opposed to say servlet or an EJB for my application? What is a good
rationale to use?
Thanks,
Sadhana

Hi Adam,
Thanks a lot for giving such a lucid explanation of my vague question!
I understand now the difference between when to use EJBs/Servlets/Web Services.
Thanks again!
Sadhana
"Adam FitzGerald" <[email protected]> wrote:
>
Hi Sadhana,
Web service versus Servlet versus EJB. Which one to use? That is a very
good question.
EJBs should be the core desription and processing of your business rules.
They generally
have good performance, are easy to integrate into your security set up but
they require
access using the RMI-IIOP protocol. This means that generally EJBs are not
accessible
outside of your firewall and their clients have to be written in Java (other
enterprise
objects or applets or GUI applications).
Servlets often form a web-based front end to EJBs. They also have good performance,
integrate into security and only require HTTP access. This means they are
accessible
outside your firewall and any client with a HTTP or web API can call on
them, however,
there is no standard contract or rules for this type of interaction so you
will need
provide direct input into development of the client.
Web services are also accessible via HTTP and so can be accessed from outside
your
firewall. In fact, Web services internally within Workshop and WebLogic
actually
operate by using servlets and EJBs but the main advantage is that the mechanism/contract
for interacting with the web service is a well defined standard (WSDL) and
can actually
be registered or retreived dynamically (UDDI). Since web service standards
are open,
most popular programming languages already provide client APIs to interact
with them
thus freeing the web service developer from direct interaction with the
client developer
and letting the client be developed on any platform. The penalty for this
openness
is a small performance hit (XML translation) and a slowly maturing security
model.
So in summary, use EJBs for business operations that have Java clients within
your
enterprise, use servlets to provide web style access to your business operations
(like web pages) and use web services to enable automated clients that can
be written
on any platform either inside or outside your enterprise (firewall). In
fact, it
is common to write the EJB first and then to expose some parts of it outside
of your
enterprise by writing a web service wrapper (maybe using the EJB controls
that we
saw in class).
I hope this helps.
Adam
"Sadhana Jain" <[email protected]> wrote:
Hi,
I don't know if this is an appropriate question to ask for this class as
it's not
workshop
specific. I was wondering how will I decide when it is appropriate to use
a web
service as opposed to say servlet or an EJB for my application? What is
a good
rationale to use?
Thanks,
Sadhana

Envorcing authentication with session ejb web service?

I implemented a web service as a session ejb. Some of the methods exposed by this web service require certain privileges. I modified my ejb-jar.xml file and declaratively specified this by using the <method-permission> element.
I have a Java client. If I pass credentials (e.g., name, password) into the constructor of the stub for the web service interface, the container properly recognizes this information, authenticates the user and either responds to or rejects the request based on if the user is permitted to call the method.
I have a non-Java client. If I try to do the same thing, it does not work. Peeking underneath the covers, I've discovered that the credentials are never being used.
Now I did get something to work. If I manually modify the web.xml for the web-services.war that is generated by servicegen to put a security constraint on the URL for the web service using the <security-constraint> element, when I run the non-Java client again, the credentials are used, properly recognized, etc.
(1) Does anyone know why the security constraint is necessary for the non-Java client but not the Java client?
(2) Am I doing something wrong? missing something? Is there a different way to do this?
(3) Since I implemented the web service as a session EJB but it appears the generated web-services.war content needs to be manually modified, is there a way to generate this security constraint? I've tried various things and cannot seem to do this.
Thanks for feedback!

Debu,
Yes, it successfully deployed.
Here are the messages from the failed run.
BUILD SUCCESSFUL
Total time: 33 seconds
D:\Oracle_ejb3.0\demo\howtoejb30ws>ant run
Buildfile: build.xml
common:
[echo] BuildName: ejb30ws
[echo] BuildHome: D:\Oracle_ejb3.0\demo\howtoejb30ws
[echo] BuildFile: D:\Oracle_ejb3.0\demo\howtoejb30ws\build.xml
[echo] BuildJVM: 1.5
oracle-env-check:
java-env-check:
init:
[echo] -----> Initializing project properties
setup:
[echo] -----> Creating the required sub-directories
cli-setup:
[echo] -----> Setting up the application client module
[oracle:genProxy] null, WSDLException: faultCode=INVALID_WSDL: The document: http://localhost:8888/ejb
/ejb30ws?wsdl is not a wsdl file or does not have a root element of "definitions" in the "http://schem
mlsoap.org/wsdl/" namespace or the "http://www.w3.org/2004/08/wsdl" namespace.
[oracle:genProxy] WSDLException: faultCode=INVALID_WSDL: The document: http://localhost:8888/ejb30ws/e
ws?wsdl is not a wsdl file or does not have a root element of "definitions" in the "http://schemas.xml
.org/wsdl/" namespace or the "http://www.w3.org/2004/08/wsdl" namespace.
BUILD FAILED
D:\Oracle_ejb3.0\demo\howtoejb30ws\build.xml:316: oracle.j2ee.ws.common.tools.api.WsdlValidationExcept
null, WSDLException: faultCode=INVALID_WSDL: The document: http://localhost:8888/ejb30ws/ejb30ws?wsdl
not a wsdl file or does not have a root element of "definitions" in the "http://schemas.xmlsoap.org/ws
namespace or the "http://www.w3.org/2004/08/wsdl" namespace.
Total time: 3 seconds
D:\Oracle_ejb3.0\demo\howtoejb30ws>

Oracle9iAS Web servics sample

All,
Have a look at the new web services sample which demonstrates how to build different type of web services(stateless java,
stateful java, stateless EJB & PL/SQL) and consume it in a typical eBusiness application. Viewlets are also provided as how the
services need to be built, which are available both online and with the sample distribution.
http://otn.oracle.com/sample_code/tech/java/web_services/content.html
Enjoy,
--Rajesh

You should have no problem using Web Cache to accelerate a PL/SQL driven site. Any site that delivers content via HTTP is a good candidate for Web Cache. Try downloading the standalone Web Cache software from OTN, and be sure to read the manual to learn about how it works and how to configure it.

How to enable SOAP compression in web services

Hi, I have created a web services by exposing an EJB using annotations. Trouble now is that the output is an array of Objects which grew to a significant size to cause latency issue. I have saw folks using filters to compress the HTTP response but is unable to find much resources on the web linking up annotated-EJB web services to link up with the filters but most of the examples I see are based on handlers and not EJB-exposed web services, can someone point me to some resources for that type of web services + compression?
Another thing which caught my attention is the use of the <compress-html-template> tag which needs to be in the web.xml file, but since I am using a "generated" web services as per say, I do not have that web.xml file, how then can I use that feature?
Thanks in advance.

Hi Anke,
all tables that have been created in V9.7 with attribute COMPRESS YES will be compressed statically .
db2 " select count(*) , rowcompmode from syscat.tables group by rowcompmode "
After the upgrade to 10.5 all tables created with attribute COMPRESS YES will get rowcompmode='A' but old tables created with V9.7 will stay with rowcompmode='S' .
You can change tables from rowcompmode='S' to rowcompmode='A' via ALTER TABLE . After this all new pages or old pages that are touched will be adaptively compressed. But old pages that are not touched will only be static compressed. To get all pages of an existinbg table adaptive compressed you need to move data. For example with DB6CONV.
Regards
Frank

Web Services Client is not working fine on JBOSS 4.0.4.GA

Dear Team,
we had JBOSS AS 4.0.3 and web services was build on EJB which was working fine. we new have to migrate it to JBOSS 4.0.4.GA Application Server....
we have generated wsdl, webservices.xml and jaxrpc-mapping.xml file from wstools.exe of JBOSS AS 4.0.4.GA and we are able to see the web services wsdl on web browser.... but when we execute the same client which was earlier running for JBOSS 4.0.3 it throws error saying
javax.xml.rpc.ServiceException :modeler error : uniqueness constraint voilation, duplicate member found "type" to javastructureType "userDetails"
rgrds,
~J

Please provide the following information:
- Help > About BEA Workshop studio - build #
- Window > Preferences > Java - Installed JREs - what is your default JRE selection?
- Run > Run... _ J2EE Server > JBoss 4.0 - Have you customized any of the default values. Ex: Arguments, Classpath ...
- What kind of application are you trying to debug Struts/JSF?
- Can you try to reproduce the problem with the bundled samples workshop-struts-tour/bookstore (run the app and modify one of the configuration file).
- Do you see the same behavior with Sun JDK?
- Finally, copy-paste the first line from the "Console View"
Message was edited by:
ram.v

Help Required...Web Service does not start automatically...

I have a web service created with a EJB, everything is fine now.
After restarting the Server, web service doesn't get start automatically.
I have done the changes for the EJB - .ear project - application-j2ee-engine.xml file with the below.
<start-up mode="always"/>
But it still doesnt start. any help is appreciated.
This is the document i have referred.
http://help.sap.com/saphelp_nw04s/helpdata/en/25/0c08f3981343609d4045f8acaa0a76/frameset.htm
Thanks,
Sridhar
Edited by: Sridhar k on Jan 5, 2009 9:11 AM

Hai,
Just a tought...:-|
Check the value in your file, is it typing mistake or you have entered the same in your file.
<start-up mode="always"/> it should be <start-up mode="always">.
Regards,
Yoganand.V

Is a Web Services "conversation" a Stateful EJB?

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