Help needed in EJB
Hi friends ,
I need your help in EJB
I have to perform these operations
1) Calling an Appl Service from a EJB module.
2) Calling an EJB module from an Appl Service.
3) Basics of JNDI.
for the second part I am exposing the EJB module as an Web Service and then consuming it in the Application Service as an External Service(that EJB has a Session Bean with a local Interface that has some logic to be exposed ).(Any further suggestions for this !!!!)
1)But I still dont know how to call an Application Service from an EJB module .
3)And finally I have an Application Service which would have a JNDI strings pointing to the Local EJB Interfaces and I have to access any one string from a Application Service and call that Local EJB Interface(local EJB invocation)
So can anyone help me in these two areas
Please keep in mind that I am relatively new to J2EE.
Thanks in advance
Hi,
You need to change your application server specific
deployment descriptors.
If your ejb uses container-managed persistence then you need to creates
jdo resources in your application and also modify application server specific deployment descriptors.
-Amol
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Beginner Question - Help Needed for EJB QL Sample Application
I'm working with a group of student interns, like myself, and we've been given an assignment to work with Oracle. All of us have no training or experience with this, so we're just learning as we go.
I've been trying to run the EJB QL Sample Application (http://www.oracle.com/technology/sample_code/tech/java/ejb_corba/ejbql/Install.html), but I keep running into problems at step 3.
Now, we will deploy the sample application onto OC4J. Open another command prompt and go to the folder <OC4J_HOME>/j2ee/home and run the following commands one-by-one
> java -jar admin.jar ormi://<machine_name>:<admin_port> admin <admin_pwd> -deploy -file <SAMPLE_HOME>/build/ejbql.ear -deploymentName Ejbql
> java -jar admin.jar ormi://<machine_name>:<admin_port> admin <admin_pwd> -bindWebApp Ejbql ejbql-war http-web-site /ejbql
where,
<machine_name> Name of the machine where OC4J Server is running
<admin_port> Admin Port on which the OC4J server listens. This value by default is 23791 unless explicitly changed by the user
<admin_pwd> Adminstrator password to access OC4J. The default value is welcome
When I do this step I get this error:
Error: Unable to find java:comp/ServerAdministrator: Lookup error: javax.naming.
AuthenticationException: Invalid username/password for default (sds); nested exc
eption is:
javax.naming.AuthenticationException: Invalid username/password for defa
ult (sds)
com.evermind.client.orion.AdminCommandException: Unable to find java:comp/Server
Administrator: Lookup error: javax.naming.AuthenticationException: Invalid usern
ame/password for default (sds); nested exception is:
javax.naming.AuthenticationException: Invalid username/password for defa
ult (sds)
at com.evermind.client.orion.Oc4jAdminConsole.executeCommand(Oc4jAdminCo
nsole.java:105)
at com.evermind.client.orion.Oc4jAdminConsole.main(Oc4jAdminConsole.java
:27)
javax.naming.NamingException: Lookup error: javax.naming.AuthenticationException
: Invalid username/password for default (sds); nested exception is:
javax.naming.AuthenticationException: Invalid username/password for defa
ult (sds) [Root exception is javax.naming.AuthenticationException: Invalid usern
ame/password for default (sds)]
at com.evermind.server.rmi.RMIContext.lookup(RMIContext.java:153)
at com.evermind.client.orion.Oc4jAdminConsole.executeCommand(Oc4jAdminCo
nsole.java:102)
at com.evermind.client.orion.Oc4jAdminConsole.main(Oc4jAdminConsole.java
:27)
Caused by: javax.naming.AuthenticationException: Invalid username/password for d
efault (sds)
at com.evermind.server.rmi.RMIConnection.connect(RMIConnection.java:2410
at com.evermind.server.rmi.RMIConnection.connect(RMIConnection.java:2226
at com.evermind.server.rmi.RMIConnection.lookup(RMIConnection.java:1692)
at com.evermind.server.rmi.RMIServer.lookup(RMIServer.java:727)
at com.evermind.server.rmi.RMIContext.lookup(RMIContext.java:134)
... 2 more
---- Embedded exception
javax.naming.AuthenticationException: Invalid username/password for default (sds
at com.evermind.server.rmi.RMIConnection.connect(RMIConnection.java:2410
at com.evermind.server.rmi.RMIConnection.connect(RMIConnection.java:2226
at com.evermind.server.rmi.RMIConnection.lookup(RMIConnection.java:1692)
at com.evermind.server.rmi.RMIServer.lookup(RMIServer.java:727)
at com.evermind.server.rmi.RMIContext.lookup(RMIContext.java:134)
at com.evermind.client.orion.Oc4jAdminConsole.executeCommand(Oc4jAdminCo
nsole.java:102)
at com.evermind.client.orion.Oc4jAdminConsole.main(Oc4jAdminConsole.java
:27)
Any suggestions to fix this error?
Thanks in advance for any help.George,
The Readme.html file is available with the ejbqlsample.jar downloadable (Extract and find the doc in Ejbql\docs\Readme.html) which is printable.
Or,
If you are trying to print the file directly from OTN site, you need to set the Page-Setup Orientation to 'Landscape'.
Hope this helps.
Regards
Pushkala -
Help needed in EJB - to call AS from EJB a Session Bean
Hi All ,
I have been strictly told not to use Web Services as all the applications are on the same server
actually I have to make an EJB invocation to an Application Service from the CAF layer from a Session Bean of another EJB Project(Not a CAF Service).
the CAF layer has 5 parts metadata , permissions , dictionary , ear and ejbmodule.
I added the ejbModule to the Build Path of the calling EJB Session Bean. And so I was able to access the operations of the Application Service which in turn accesses a BAPI(The Appl Service operation returns a String).
But while executing I got the exception java.lang.RuntimeException: java.lang.NoClassDefFoundError
My method :
Normally from a Dynamic Web Project acting as a client to an EJB Session bean, I was able to get access to EJB Local Interface by using
private ConverterLocal converterBean = null;
public void jspInit() {
try {
InitialContext ic = new InitialContext();
converterBean = (ConverterLocal)
ic.lookup("java:comp/env/Converter");
} catch (Exception ex) {
System.out.println("Couldn't create converter bean."+
ex.getMessage());
BigDecimal dollarAmount = converterBean.euroToDollar(value);
So I created a JNDI field in ejb-j2ee-engine.xml
enterprise-beans>
<enterprise-bean>
<ejb-name>com.sap*******.bapi_company_getlist.BAPI_COMPANY_GETLIST</ejb-name>
<jndi-name>COMPANY</jndi-name>
</enterprise-bean>
</enterprise-beans>
And from my Session Bean , I tried to access it using the code in already existing Bean which was working fine
BAPI_COMPANY_GETLISTBeanImpl bean = new BAPI_COMPANY_GETLISTBeanImpl();
try {
InitialContext ctx = new InitialContext();
bean = (BAPI_COMPANY_GETLISTBeanImpl)ctx.lookup("COMPANY");
} catch (NamingException e) {
System.out.println("Converter Bean can't be created");
String send = bean.returnDetails();
And I tried to print the String , but I got the above error
I have a doubt :
1) How do I specify the JNDI name ie in the ejb-j2ee-engine.xml file , what should I add as the name of the ejb
is this sufficient , or are there more steps ??Hi Ekaterina,
I have the document to access my Bean from another Bean.
I could access my Bean from a standalone Java class with this code
Properties props = new Properties();
props.put(Context.INITIAL_CONTEXT_FACTORY,"com.sap.engine.services.jndi.InitialContextFactoryImpl");
props.put(Context.PROVIDER_URL,"hostname:port");
try{
Context ctx = new InitialContext(props);
Object o = ctx.lookup("sap.com/TestEAR/REMOTE/TestBean/com.@#$.TestRemote");
TestRemote testRem = (TestRemote)javax.rmi.PortableRemoteObject.narrow(o, TestRemote.class);
String msg = testRem.getMessage();
System.out.println(msg);
And in this document there is a way shown to access a bean from another Bean.
http://help.sap.com/saphelp_nw04/helpdata/en/13/c8633e0084e946e10000000a114084/frameset.htm
If your client is another enterprise bean, declare the EJB reference in the ejb-jar.xml.
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help needed for writing query
i have the following tables(with data) as mentioned below
FK*-foregin key (SUBJECTS)
FK**-foregin key (COMBINATION)
1)SUBJECTS(table name)
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2 02 Computer Science
3 03 Physics
4 04 Chemistry
5 05 Mathematics
7 07 Commerce
8 08 Computer Applications
9 09 Biology
2)COMBINATION
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383 S1 9 4 2 3
384 S2 4 2 5 3
---------I actually designed the ABOVE table also like this
3) a)COMBINATION
COMB_ID(NUMBER) COMB_NAME(VARCHAR2)
383 S1
384 S2
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1 383 9
2 383 4
3 383 2
4 383 3
5 384 4
6 384 2
7 384 5
8 384 3
Business rule: a combination consists of a maximum of 4 subjects (must contain)
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i need the following output
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383 S1 Biology Chemistry Computer Science Physics
384 S2 Chemistry Computer Science Mathematics Physics
or even this is enough(what i actually needed)
COMB_ID subjects
383 Biology,Chemistry,Computer Science,Physics
384 Chemistry,Computer Science,Mathematics,Physics
you can use any of the COMBINATION table(either (2) or (3))
and i want to know
1)which design is good in this case
(i think SUB_ID1,SUB_ID2,SUB_ID3,SUB_ID4 is not a
good method to link with same table but if 4 subjects only(and must) comes
detail table is not neccessary )
now i am achieving the result by program-coding in C# after getting the rows from oracle
i am using oracle 9i (also ODP.NET)
i want to know how can i get the result in the stored procedure itsef.
2)how it could be designed in any other way.
any help/suggestion is welcome
thanks for your time --PradeeshWell I forgot the table-alias, here now with:
SELECT C.COMB_ID
, C.COMB_NAME
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID1) AS SUBJECT_NAME1
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID2) AS SUBJECT_NAME2
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID3) AS SUBJECT_NAME3
, (SELECT SUB_NAME
FROM SUBJECTS
WHERE SUB_ID = C.SUB_ID4) AS SUBJECT_NAME4
FROM COMBINATION C;
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Help needed for grouping.
Hi,
Help needed .
I have an internal table having 6 .
Ex :
f1 f2 f3 f4 f5 f6
a aa 11 p1 10 10
a aa 12 p1 20 20
b aa 11 p2 30 30
b aa 12 p2 40 30
Now i want to sum the fields f5 and f6 individually and need to display based upon the fields f1 and f4.
To Display :
f1 f2 f3 f4 f5 f6
a aa 11 p1 30 30.
b aa 11 p2 70 60.
can anyone help me.How to do this..?
ThanksHere you go
DATA:
BEGIN OF cur_tab OCCURS 0,
f1 TYPE c,
f2(2) TYPE c,
f3(2) TYPE c,
f4(2) TYPE c,
f5(2) TYPE c,
f6(2) TYPE n,
END OF cur_tab.
DATA:
BEGIN OF sum_tab OCCURS 0,
f1 TYPE c,
f4(2) TYPE c,
f5 TYPE p,
f6 TYPE p,
END OF sum_tab.
DATA:
BEGIN OF final_tab OCCURS 0,
f1 TYPE c,
f2(2) TYPE c,
f3(2) TYPE c,
f4(2) TYPE c,
f5(5) TYPE c,
f6(5) TYPE c,
END OF final_tab.
START-OF-SELECTION.
cur_tab-f1 = 'a'.
cur_tab-f2 = 'aa'.
cur_tab-f3 = '11'.
cur_tab-f4 = 'p1'.
cur_tab-f5 = '10'.
cur_tab-f6 = '10'.
APPEND cur_tab.
cur_tab-f1 = 'a'.
cur_tab-f2 = 'aa'.
cur_tab-f3 = '11'.
cur_tab-f4 = 'p1'.
cur_tab-f5 = '20'.
cur_tab-f6 = '20'.
APPEND cur_tab.
cur_tab-f1 = 'b'.
cur_tab-f2 = 'aa'.
cur_tab-f3 = '11'.
cur_tab-f4 = 'p2'.
cur_tab-f5 = '30'.
cur_tab-f6 = '30'.
APPEND cur_tab.
cur_tab-f1 = 'b'.
cur_tab-f2 = 'aa'.
cur_tab-f3 = '11'.
cur_tab-f4 = 'p2'.
cur_tab-f5 = '40'.
cur_tab-f6 = '30'.
APPEND cur_tab.
LOOP AT cur_tab.
MOVE-CORRESPONDING cur_tab TO sum_tab.
COLLECT sum_tab.
ENDLOOP.
LOOP AT sum_tab.
READ TABLE cur_tab WITH KEY f1 = sum_tab-f1
f4 = sum_tab-f4.
IF sy-subrc NE 0.
WRITE:/ 'Something went very wrong'.
CONTINUE.
ENDIF.
MOVE-CORRESPONDING cur_tab TO final_tab.
MOVE-CORRESPONDING sum_tab TO final_tab.
APPEND final_tab.
ENDLOOP.
LOOP AT final_tab.
WRITE:/1 final_tab-f1,
AT 5 final_tab-f2,
AT 10 final_tab-f3,
AT 15 final_tab-f4,
AT 20 final_tab-f5,
AT 25 final_tab-f6.
ENDLOOP.
and the output
a aa 11 p1 30 30
b aa 11 p2 70 60 -
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Hey,
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Edited by: 916438 on Mar 31, 2012 5:55 PM -
Help needed on installation of Oracle 9i EE on Sun Solaris 8
Hey,
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Help needed in Finding Download location for Sun One Portal 7
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help needed for finding download location for Sun ONE Portal 7. I tried to find in Oracle Download page ,
http://www.oracle.com/us/sun/sun-products-map-075562.html, But unable to find.
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Help needed in constructing a tree
Help needed in constructing a tree. I was wondering if some one can suggest me how to add messages in the second column for both the parent node and child elements.
I was able to create a tree succefully, but want to add some description in the second column for the first column elements, for both parent and child elements.
Please suggest me how to add the arrays to second column for parent and child nodes.
Solved!
Go to Solution.
Attachments:
Tree_fix.vi 15 KBThe Child Text parameter is the one you are searching for. It accepts a 1D string array for the following columns.
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