How to realize pagination on db with EJB?

I'm using EJB to access Database, but I dont' know how to realize pagination.

I'm a little new to EJB's also, so this is kind of a guess, but here goes:
You've got your session EJB, right? Then you'll have a page EJB so you can select what page to look at. That bean should be represented by a pulldown menu item in html. When it changes, load up the same page, but adjust the session variable you pass so that it indicates the data range you're after (chosen by the page EJB)

Similar Messages

How to use ADF Query search with EJB 3.0

Hi,
In ADF guide http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/web_search_bc.htm#CIHIJABA
The steps to create query search with ADF Business Components says:
"+From the Data Controls panel, select the data collection and expand the Named Criteria node to display a list of named view criteria.+"
But with EJB, I'm not able to find Named Criteria node. Can we use ADF query search component with EJB? If yes, can you please show me some example, tutorial etc.?
Thanks
BJ

For EJBs you'll need to implement the query model on your own.
An example of how the model should look like is in the ADF Faces components demo.
http://jdevadf.oracle.com/adf-richclient-demo/faces/components/query.jspx
Code here:
http://www.oracle.com/technology/products/adf/adffaces/11/doc/demo/adf_faces_rc_demo.html

How to use Java Web Start with EJB ?

hi forum...
how to use Java WebStart with EJB ?
examples ?
thanks...
mindu

Mindu,
WebStart will work with EJB. I use it with WebLogic Server. You have to make sure and deploy the weblogic.jar file - sign it if needed.
For signing information, look here,
http://java.sun.com/products/javawebstart/1.2/docs/developersguide.html
Dan

Newbie: How does the security manager work with EJB?

Hi,
I am new to J2EE and do not seem to grasp how the security manager (or J2EESecurityManager) works with EJB.
My bean does security-senisitive stuff (like getting the Policy object) and must not do so unless I give it permission in the policy file. So far so good. But the permission will only work if I grant it to ALL code, like:
grant {
permission java.security.SecurityPermission "getPolicy";
Beans do not seem to have a protection domain or code source/certificates attached to it. so I cannot say
grant "/file/sw/ejb/myejb.jar" {
permission java.security.SecurityPermission "getPolicy";
Why is that (probably because beans run remote)? But more importantly, how DO I set permissions based on which bean it is?

If I add that directory as the codebase to
a grant statement any class loaded from there will
have the specified permission.I thought so, too, and that is why I went digging for the code source of my bean (i.e. where is it deployed, from where is it loaded) but that source is NULL:
Some program output:
==Has security manager: com.sun.enterprise.J2EESecurityManager
==Code source is ProtectionDomain (null <no certificates>)
The code seems to have no code source (null) and no signatures (in fact, I also signed my code with the keytool but that certificate did not show here either).
I am running this against the j2ee server 1.3 -- just experimenting, but it does not go so well. :-)

How to use (toplink essentials)JPA with EJB 2.1 spec in oc4j 10.1.3.2

I have an application that uses EJB 2.1 spec with SLSB (no entity beans) and uses DAO pattern with hibernate2 for persistence. I want to replace hibernate with toplink-essentials (JPA). I cannot upgrade the EJB spec version as we use some thirdparty beans. The application uses DAO pattern so I should be able to hook in a new toplink DAO impl. What I am struggling with is how do I get hold of the EntityManagerFactory in my EJB 2.1 SLSB. Also I need CMT with XA transactions as our application interacts with jms and database using MDBs and SLSBs.
Prantor

You should be able to use Persistence.createEntityManagerFactory(<your-persistence-unit-name>, properties), and create your EntityManager from that.
To have TopLink integrated with JTA, in your persistence.xml (or properties) you need to use a JTA DataSource, and set the ServerPlatform for your JEE server.

How to realize Module Dependency Analysis with JDAPI?

Hy @all,
I work on a migration project from Forms 6i to 10g.
To analyze the form modules I use the Oracle Forms2XML-Tool and filter the necessary infos out off the received XML-Files.
Unfortunately, by use this method, I could not find out the module dependencies among each other. That means I could not expose which module calls which module and which module is called by which module.
What I now want to know is, if there is a way to find out these dependecies by use of the JDAPI. I had a look to the JDAPI- Doc but I could not find any method or solution for this problem.
Thx for the answers.
Best regards
Chris

Hy Michael,
thx for your answer.
I had captured my forms modules into the repository and had a look of the dependencies via dependency manager, but I don´t see the dependencies between the modules there.
Maybe I forgot something at the capture or the dependency analysis.
However, there is another way to show the dependencies of a forms module.
I have convert it into XML via Oracle´s forms2xml tool and in this XML-file you can see all dependencies, so also the dependencies between forms modules.
Thx to Arun for this information.
best regards
Chris

How to do pagination with oracle along with java

hi
i want to know how to use pagination codes along with java.

Are you sure that you're on the right forum? This is the forum for Berkeley DB, Java Edition, and we don't support SQL.
Linda

Using CallRouter with ejb

          Hi,
          Can anyone plz let me know how do I use CallRouter class with
          ejb. The tool weblogic.ejbc is used to generate stubs and skeletons ..
          thanx
          pradeep


You need to have the <home-call-router-class-name> tag in your
          weblogic-ejb-jar.xml
          see below
          http://e-docs.bea.com/wls/docs61/ejb/reference.html#1070646
          Kumar
          "pradeep bhat" <[email protected]> wrote in message
          news:3c9356e4$[email protected]..
          >
          > Hi,
          > Can anyone plz let me know how do I use CallRouter class with
          > ejb. The tool weblogic.ejbc is used to generate stubs and skeletons ..
          > thanx
          > pradeep
          >
          >

JSF combined with EJB, how??

Hi @ll,
I have been trying for some days to combine my JSF pages with EJB Session Beans, but I haven't really found a working way to do it.
First, I had my session bean directly as the backing bean for the JSF page, but I read somewhere that this isn't "allowed", so I created a helper bean as managed bean. This is now the backing bean for the jsf page and has as attribute the session bean.
My helper bean:
public class ManagedHelperBean {
@EJB private JDDACReaderBeanRemote reader;
public JDDACReaderBeanRemote getReader() {
     return reader;
public void setReader(JDDACReaderBeanRemote reader) {
     this.reader = reader;
}Part of my faces-config.xml
<managed-bean>
<managed-bean-name>helper</managed-bean-name>
<managed-bean-class>com.company.ManagedHelperBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>Part of my jsp page:
<h:outputText value="#{helper}"/>
<h:outputText value="#{helper.reader}"/>Now, the first output in the jsp page works, the second one doesn't. Why can't the property reader be accessed?? What is the correct way to combine JSF with EJB?
Kind regards,
Wiebke

Hello,
I faced the same problem, but on a Weblogic 10 server.
The problem with Weblogic 10 is, even if it's "supposed" to be a EE5 compliant server, it is not.
As described here http://e-docs.bea.com/wls/docs100/webapp/annotateservlet.html , there is no Dependency Injection in JSF managed beans:
The web container will not process annotations on classes like Java Beans and other helper classes.
But, WL 10 offers DI on Servlets, Filters and Listeners.
Here is how I solved it (probably not the best way, but it works for me):
- created a filter with a list of EJB injected (as it works). For every filtered request, set a list of known (enum) as request attributes mapped each to a EJB service:
public class EJBInjectFilter implements Filter {
@EJB
private MyEJBService ejbRef;
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws IOException,
               ServletException {
log.debug("Setting EJB ref into request as attribute ");
          req.setAttribute(ServiceEnum.MY_EJB_SERVICE.toString(), ejbRef);
          chain.doFilter(req, resp);
- for every managed bean who needs a service you can do something like:
(MyEJBService) ((HttpServletRequest) FacesContext.getCurrentInstance().
               getExternalContext().getRequest()).getAttribute(ServiceEnum.MY_EJB_SERVICE.toString())
to get a reference to service.
I agree it is a totally not elegant solution. But why does WL 10 say it's a full JEE5 compliant server, and though does not provide DI for managed beans?
A drawbacks I could think of is performance slow-down (for every request, apply filter, set list of attributes + references into request) - probably it does take some time.
Let me know your thoughts.
Edited by: cosminj on Nov 20, 2007 8:16 AM

How to use Java WebStart with EJB ?

hi forum...
how to use Java WebStart with EJB ? examples ?
thanks
mindu

Greetings,
hi forum...
how to use Java WebStart with EJB ? examples ?Well, for starters these are complementing, not 'cooperating', technologies. I presume, since EJB's do not - directly, at least - communicate with a web browser, that you intend for "Java WebStart" to somehow invoke an EJB?? Java WebStart is a technology for running client-side (Java) applications from the web browser - perceptively, the application resides on the server, but technically it, like an applet, is downloaded to the client and run there. Unlike an applet, however, it is not constrained by "sandbox" restrictions and does not have to be re-downloaded each time it is invoked - though the process allows for automagically updating the client-side with new versions of the application. ;) So, with this in mind, to "use Java WebStart with EJB" means little more than deploying an EJB client application with Java WebStart as the distribution channel.
thanks
minduRegards,
Tony "Vee Schade" Cook

How to realize 'parent first' with grid api?

I can realize most of the functions as realized in hyperion analyzer with SetGridOption function in grid api except 'parent first' function. Hyperion analyzer version 5.03 can work in 'Use Grid Api' mode, and can produce the right result, with parent member listed on the top of all it's children members. So I am sure grid api can do it. Could someone tell me how to do it?

You'd think so, but no. The Grid API works the same way as the spreadsheet add-in - Analyzer has some client code that does the manipulation to "flip" the zoom in results to show the parent first.None of the available options in the SetGridOption function pertain to the positioning of the parent member.Regards,Jade-------------------------------Jade ColeSenior Business Intelligence ConsultantClarity [email protected]

How integrate JAAS with EJB Server?

I want to use JAAS to create a security Handler for an open source EJB Server. Does anyone have some suggestions on how best to integrate this with EJB's (using EJB 1.1 for now)?
Any ideas, or problems you might see, or things to be careful of are all welcome!

Weblogic 6 actually provides this as an example. They use JAAS login modules for authentication purposes. I don't think this integration is too difficult. In integrating authorization I believe they just delegate to one of their security realms.

How update with EJB

Hi all,
is it possible to update with EJB CMP?? If yes... how?
Thanks,
Vito

Hi Vito,
Why not, we can do that. Please refer some of the awesome links as i am listing below,
Concepts of CMP:
http://www.caucho.com/resin-3.0/cmp/tutorial/index.xtp
http://java.sun.com/products/jdo/JDOCMPFAQ.html
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/7d5db590-0201-0010-dd93-9ec216811b9e
Some examples and source code :
http://java.sun.com/j2ee/sdk_1.3/1.3_01/techdocs/release/CMP-RI.html
http://java.sun.com/developer/technicalArticles/ebeans/EJB20CMP/index.html
I hope these will be good enough clear your doubts, if feel necessary reply back.
Regards,
Guru.

How to realize this kind of ALV(with two headerlines)?

Dear all:
could anyony provide some advice on how to realize this kind of ALV?
|--|--
field2
|--|||--
     field11 | field12   | field21 | field212      |
|--|||--
wait your kindly advice

I had similar kind of requirement. Have a look at below code. It will help you. You can execute it. You can see the report output which contains two header lines.
REPORT ztestvib    MESSAGE-ID zz LINE-SIZE 50.
TYPE-POOLS: slis.
DATA: x_fieldcat TYPE slis_fieldcat_alv,
      it_fieldcat TYPE slis_t_fieldcat_alv,
      l_layout TYPE slis_layout_alv,
      x_events TYPE slis_alv_event,
      it_events TYPE slis_t_event.
DATA: BEGIN OF itab OCCURS 0,
      vbeln LIKE vbak-vbeln,
      posnr LIKE vbap-posnr,
      male TYPE i,
      female TYPE i,
     END OF itab.
SELECT vbeln
       posnr
       FROM vbap
       UP TO 20 ROWS
       INTO TABLE itab.
x_fieldcat-fieldname = 'VBELN'.
x_fieldcat-seltext_l = 'VBELN'.
x_fieldcat-tabname = 'ITAB'.
x_fieldcat-col_pos = 1.
APPEND x_fieldcat TO it_fieldcat.
CLEAR x_fieldcat.
x_fieldcat-fieldname = 'POSNR'.
x_fieldcat-seltext_l = 'POSNR'.
x_fieldcat-tabname = 'ITAB'.
x_fieldcat-col_pos = 2.
APPEND x_fieldcat TO it_fieldcat.
CLEAR x_fieldcat.
x_fieldcat-fieldname = 'MALE'.
x_fieldcat-seltext_l = 'MALE'.
x_fieldcat-tabname = 'ITAB'.
x_fieldcat-col_pos = 3.
APPEND x_fieldcat TO it_fieldcat.
CLEAR x_fieldcat.
x_fieldcat-fieldname = 'FEMALE'.
x_fieldcat-seltext_l = 'FEMALE'.
x_fieldcat-tabname = 'ITAB'.
x_fieldcat-col_pos = 3.
APPEND x_fieldcat TO it_fieldcat.
CLEAR x_fieldcat.
x_events-name = slis_ev_top_of_page.
x_events-form = 'TOP_OF_PAGE'.
APPEND x_events TO it_events.
CLEAR x_events .
l_layout-no_colhead = 'X'.
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
EXPORTING
    i_callback_program = sy-repid
    is_layout          = l_layout
    it_fieldcat        = it_fieldcat
    it_events          = it_events
TABLES
    t_outtab           = itab
EXCEPTIONS
    program_error      = 1
    OTHERS             = 2.
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
          WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
*&      Form top_of_page
      text
FORM top_of_page.
*-To display the headers for main list
FORMAT COLOR COL_HEADING.
WRITE: / sy-uline(103).
WRITE: /   sy-vline,
        (8) ' ' ,
             sy-vline,
        (8) ' ' ,
             sy-vline,
        (19) '***'(015) CENTERED,
             sy-vline.
WRITE: /   sy-vline,
        (8) 'VBELN'(013) ,
             sy-vline,
        (8) 'POSNR'(014) ,
             sy-vline,
        (8) 'MALE'(016) ,
             sy-vline,
         (8) 'FMALE'(017) ,
             sy-vline.
FORMAT COLOR OFF.
ENDFORM.                    "top_of_page
The header lines are as below:
VBELN      POSNR      MALE       FMALE
I hope it helps.
Best Regards,
Vibha
*Please mark all the helpful answers

I am beginer with EJB .Someone can show me how to run EJB,please

I am beginer with EJB .Someone can show me how to run EJB,please
You can give me 1 example Complete and present Compltely!
My Email : [email protected]
Thanks you!

Do the same that the rest of us do: buy a book. Enterprise Javabeans 3 from O'Reilly is an excellent book that will teach you all you need to know, if you are willing to put in a little effort.

How to realize pagination on db with EJB?

Similar Messages

Maybe you are looking for