How to retrieve information from entity beans?
Hi all!
I have a problem while trying to get information from entity beans. Here it goes:
There are two entity beans with 1:N relationship between them.
A FacadeSB is used to find a single record in one entity bean, using the findbyPrimaryKey method.
What is required now is to get information from the other entity bean matching the record found from the first entity bean.
to become more clear, the db schema is like that:
vehicle_table
vehicleid (vehicle_pkey)
name (type of vehicle i.e. car, bike, atv, etc)
brand_table
brandid (brand_pkey)
name (brand name e.g. ferrari)
vehicleid (foreign key to vehicle_table)
a FacadeSB gets the vehicle_table info and passes them to a servlet generated dropdown.
what is the best way to populate a brand dropdown based on the vehicle dropdown selection?
thanx in advance
I hope the problem definition is clear enough for you guys...
thanx for the reply
i'm ok with the finder methods you suggested. my main concern in whether to create another FacadeSB to access the brand EJB. I don't believe that's the way to go on i.e. creating a session bean for every EJB created. Shall i use the VehicleFacadeSB to access brand EJB as well?
I can undestand that such an implementation would be a quick fix as well as not such a resources hungry hack but on the other hand, would it make any sense architecturally?
any suggestions?
Zac
Similar Messages
-
How to retrieve information from XML using servlets
Hi
I have a scenario like this
File-->XI-->J2ee application(HTTP Receiver adapter)
I want to know how XI sends xml file as a query string file name?
What ever may be the case i just need to retrieve the information from Request object and display the same in browser(JSP).How to do that, I am totally confused, please anyone help me!
Code help is highly rewarded.
ThanxHi Rajesh!
I have tried your code. But some where i went wrong. Please correct me: I am using NWDS2.0.9
my web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<display-name>WEB APP</display-name>
<description>WEB APP description</description>
<servlet>
<servlet-name>DisplayRes</servlet-name>
<servlet-class>com.quinnox.DisplayRes</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DisplayRes</servlet-name>
<url-pattern>/DisplayRes/*</url-pattern>
</servlet-mapping>
</web-app>
my application.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application PUBLIC "-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN"
"http://java.sun.com/dtd/application_1_3.dtd">
<application>
<display-name>ReceiverEntpr</display-name>
<description>EAR description</description>
<module>
<web>
<web-uri>HttpReceiver.war</web-uri>
<context-root>/HttpReceiver</context-root>
</web>
</module>
</application>
and my servlet code:
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.Writer;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.xml.sax.EntityResolver;
import org.xml.sax.SAXException;
import com.sun.java_cup.internal.parser;
import com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl;
public class DisplayRes extends HttpServlet {
public void doGet(HttpServletRequest requset, HttpServletResponse response) throws ServletException, IOException
doWork(requset, response);
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
doWork(req, resp);
private void doWork(HttpServletRequest req, HttpServletResponse resp) throws IOException
String path = null;
PrintWriter out = null;
PrintWriter p2=resp.getWriter();
try
resp.setContentType("text/xml");
out = resp.getWriter();
out.println("hi");
path = req.getPathInfo();
if(req.getContentLength() != -1){
outputURI(req.getInputStream(), out);
} catch (IOException ioe) { return;
//private void outputURI(InputStream resultStream, Writer out) {
private void outputURI(InputStream resultStream, PrintWriter out) {
if (resultStream == null) {
// no default file
// logger.error("No File to return");
return;
try {
DocumentBuilder parser = DocumentBuilderFactory.newInstance().newDocumentBuilder();
// Class clazz = loader.loadClass("org.apache.xerces.jaxp.DocumentBuilderFactoryImpl");
// DocumentBuilderFactoryImpl factory = (DocumentBuilderFactoryImpl) clazz.newInstance();
// DocumentBuilder parser = factory.newDocumentBuilder();
parser.setEntityResolver(new ClassPathEntityResolver());
printXML(parser.parse(resultStream), out);
resultStream.close();
} catch (Exception e) {
// logger.error("Trying to parse the output " , e);
//private void printXML(Document document, Writer writer) throws Exception {
private void printXML(Document document, PrintWriter writer) throws Exception {
Transformer transformer = TransformerFactory.newInstance().newTransformer();
Source source = new DOMSource(document);
Result output = new StreamResult(System.out);
transformer.transform(source, output);
// Write as XML so that entity references can be resolved.
if (writer != null) {
transformer.transform(source, new StreamResult(writer));
Please tell me how to display in servlet.
If it is better to display in a browser. Please send me the code.
Thanks -
How to retrieve information from server?
Hi,
I'm currently working on a project, which is implemented with JSP. The function of the JSP is to connect to different servers within the Intranet(IP address already known) and get database list & file list residing on each server. And then compose all those information into a table, and display them in JSP. I just wonder how can I connect to those server? Can I just set up a socket client? Once the connection between servers has been setup, how can I retreive information from server? Are there any reference I can use? Thank you very much for your considerations.
MyraActually, I need extract some information from the file, and those files are on the server. In this case, do you think I should use FTP client to visit server? The server is running with Weblogic.
-
Retrieve data from entity bean to struts and display in JSP
I am integrating Struts+EJB3.0.
Now i need to retrieve data stored in mysql database through entity bean to struts framework*(Action Form*).Then i need to display it in JSP page.(display using combo box).
Please Any one give suggestions!!!!!
Thanks in advanceI got the solution.
--Jagan.+ -
How to retrieve information from iCloud (earlier than the 3 most recent backups) ?
I had to restore my iPod 4th generation to factory settings and I'm trying to get all the information back from iCloud backup. The thing is that I had waited about a week or two(instead of right away) to try to put the information back into the iPod. And when I restored it again(for the second time) it only had the choice of retrieving informaiton from the 3 most recent iCloud backups but those were too recent for the information I wanted to get back. Is there any way, ANY WAY AT ALL that I can get access to earlier iCloud backups? Like maybe all the iCloud backups that have happened so far?
I've done some research and it doesn't say there is a way but there doesn't seem to be a lot of people with this problem. :( Please if you know a way, let me know.Welcome to the Apple Community.
Unfortunately, you cannot go back further than the three backups that you already have. -
How to retrieve information from a database View name
For a given database View name, is there any way to retrieve what are the columns (also the corresponding table name) associated with that View?
I am getting the view names by using DatabaseMetaData APIs.
Now I want to retrieve the info associated with that view.
Any help will be highly appreciated.If all else fails then since you have the view name then "select * from viewname where 1=0" should work.
-
How to retrieve info from a MacOs Standard floppy?
How can I retrieve information from a MacOs Standard formatted floppy disk on Snow Lion?
I have this collection of old floppy disks that were formatted as MacOs Standard format back in the days. They do hold some files which I'd like to backup on a backup drive.
But, Snow Lion does not read MacOs Standard formatted disks apparently.
So, does anyone know how to retrieve information from MacOs Standard formatted floppy disks?
Thank you!This what I see in ML with my old SmartDisk VST (model# FDUSB-M) floppy drive:
Interesting observations:
1. I was able to add and remove files to the disk.
2. I was not able to erase the disk with Disk Utility. It returned an error.
3. Disk Utility did not offer the HFS+ format option, only FAT32 and ExFAT.
4. I could only find 1 floppy in my house so it could be partially defective. -
How do i retrieve information from the JSP into my SELECT statements?
I need to retrieve the information that is being entered into JSP page.. So that i can use them to do an SQL statement.. but im not very sure if my codes are correct.. Following are my codes.. Pls help.. thx
MyJSPPage.jsp
<jsp:useBean id="user" class="user.User" scope="session"/>
<form name="loanItem" method ="POST" action="user">
<input type="hidden" name="userID" value="<jsp:getProperty name="user" property="userID"/>">
<tr><td align=left height="34"> <b> <font size="4">Member ID:</font>
</b> </td>
<td height="34">
<jsp:getProperty name="user" property="userID"/></td>
</tr>
==================================================================================
MyManager.java --> this file is where all my SQL statements are ..
[l]String itemType = session.getParameter("itemType");[l] (--->> is how i retrieve info from the JSP page?)
if (itemType.equals("Book"))
String sqlQuery1 = "select loanDuration from ItemPolicy where itemType ='" + itemType+ "'";
System.out.println(sqlQuery1);
ItemPolicy itempolicy = null;
try {
db = new Database();
rs = db.readRequest(sqlQuery1);
if (rs != null && rs.next()) {
itempolicy = new ItemPolicy();
itempolicy.setLoanDuration(Integer.parseInt(rs.getString("loanDuration")));
db.close();
} catch (SQLException se) {
se.printStackTrace();
throw (new UserException("Unable to retrieve from Database!"));
} catch (Exception e) {
e.printStackTrace();
throw (new UserException("Unknow error encountered!"));
String dueDate = util.getDueDate(itempolicy.getLoanDuration());
else if (itemType.equals("Magazine"))
==================================================================================
Thanks in advance...you should change to request.getParameter("itemType").
or just System.out.print the itemType to see it got the value.
Hope it helps. -
how can i retrieve information from time machine if my computer has less storage capacity? How can I access data that is on my time machine but can not be copied to a computer with less storage capacity? I used to have 180 GB, now I have 128 GB.
Plug an external drive into the computer and use that to expand data onto.
http://pondini.org/TM/16.html -
How to return Collection from from entity bean to servlet?
hi
is it possible to return Collection from entity bean (Which is returns form CMR field ) to servlet ?
thanksSERVLET
public class test extends HttpServlet {
@EJB
private LocalBean lookupBean;
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
for(Item i : lookupBean.getMyCollection() )
out.println(i.getItemName());
out.close();
}BEAN INTERFACE
public interface BeanLocal {
Collection<Item> getMyCollection();
}BEAN IMPLEMENTATION
@Stateless()
public class Bean implements BeanLocal {
@PersistenceContext()
private EntityManager em;
public Collection<Item> getMyCollection() {
return em.createQuery("SELECT i from ITEM i").getResultList();
} and if you create an instance of your servlet you'll have to reinitialize LocalBean
@EJB(name="myejbref", beanInterface=BeanLocal.class)
private BeanLocal lookupBean;
private BeanLocal getLookupBean() {
if(lookupBean == null) {
try {
InitialContext ic = new InitialContext();
lookupBean = (BeanLocal) ic.lookup("java:comp/env/myejbref");
catch(Exception e){
System.out.println(e.getMessage());
return lookupBean;
} -
How to retrieve data from a CGI to SAP?
Hi guys,
I'm looking for a way to retrieve information from a CGI page into SAP. This CGI generates a XML with the response from the parameters I use on the URL.
I can xsl transform the result into ABAP variables, but first I need to know how to get that information.
As anyone come across this or knows how to do it?
Thanks in advance,
RicardoHi,
In your case, Include prog is part of FM, no need to treat it as an Entity.
Now, Your Answer -
In SCRIPT - IN Page Window -->
PERFORM GET_MVAT_TIN IN PROGRAM Z_SCRIPT_PERFORMS_ABAPDB3
USING &VBDKR-KUNRE&
CHANGING &STCD1&
CHANGING &STCD2&
ENDPERFORM
IF &STCD1& <> ' '
<B>MVAT Number :</> &STCD1&
ENDIF
Then go to SE38 --> Creat prog with type - Subroutine pool
In that Write FORM statement for this PERFORM.
FORM get_mvat_tin TABLES inttab STRUCTURE itcsy
outtab STRUCTURE itcsy.
DATA : v_kunre TYPE kna1-kunnr,
v_stcd1 TYPE kna1-stcd1,
v_stcd2 TYPE kna1-stcd2.
LOOP AT outtab.
CLEAR outtab-value.
MODIFY outtab.
ENDLOOP.
READ TABLE inttab INDEX 1.
v_kunre = inttab-value.
IF v_kunre CA sy-abcde.
ELSE.
UNPACK v_kunre TO v_kunre.
ENDIF.
" Here You can take your Funcion module ***************************
SELECT SINGLE stcd1 stcd2 FROM kna1 INTO (v_stcd1, v_stcd2)
WHERE kunnr = v_kunre.
IF sy-subrc = 0.
READ TABLE outtab INDEX 1.
WRITE v_stcd1 TO outtab-value.
MODIFY outtab INDEX 1.
READ TABLE outtab INDEX 2.
WRITE v_stcd2 TO outtab-value.
MODIFY outtab INDEX 2.
ENDIF.
ENDFORM. -
How to retrieve data from a dimension that is not directly joined to a fact
Hi,
In my case I have 2 dimensions and one fact. I need to runa report collecting data from all the three tables.
I need to do the following.
DIMA DIMB FACT1
FACT1 is joined with DIMA
DIMA is joined with DIMB
FACT1 is not Joined with DIMB.
My report should still retrieve information from DIMB by connecting FACT1 with DIMA and retrieve corresponding data from DIMB.
Please suggest how can I do this .
I am using 10.1.3 version of OBIEE
You help will be much appreciated.Hi,
I think your data model is snow-flake schema,we can get the data from snow-flake schema also.Pull the columns from both fact and DIMB into criteria.It will display the result.
mark if helpful/correct...
thanks,
prassu -
How to get information from SOAP header in weblogic without handlers
I need to retrieve information from SOAP header without handlers.
Any ideas how to do that?Just wondering if Filter can be used here, though I never tried that.
-
How to retrieve data from inside the folders in SharePoint SSRS
Hi ,
How to get the data from inside the folders and subfolders.
How can I do that.
https://social.msdn.microsoft.com/Forums/en-US/15451351-4ee2-428c-a0b7-135810e4cbfa/action?threadDisplayName=ssrs-reports-sharepoint-list-datasource-how-to-retrieve-items-from-subfolders
Here the information is not given.
Regards
VinodHi Vinodaggarwal87,
According to your description, you want to retrieve data from sharepoint list in a sub folder. Right?
In this scenario, we should select the XML data source type and in the connection string provide the
List.asmx service URL when creating data source. Then we need to use the List web Service and specify "recursive" for ViewAttribute in Lists.asmx. For detail steps, please refer to the links below:
Generate SSRS report on SharePoint List with folders using List Service.
SSRS: how to specify ViewAttributes when creating a report against a SharePoint's list
If you want to set the ViewAttribute on CAML query level. You need add the view tag outside of query tag:
<View Scope="RecursiveAll">
<Query>
<Where>...</Where>
</Query>
</View>
Reference:
View Element (List)
ViewAttributes Recursive Scope not working SharePoint 2013 CAML Query to fetch all files from document library recursively
If you have any question, please feel free to ask.
Best Regards,
Simon Hou -
How to retrieve data from table(BOM_ITEM)
Hi All,
I wrote webservices using axis1.4 to get BOM information from SAP.. funtional module is CAD_DISPLAY_BOM_WITH_SUB_ITEMS
webservices works fine..I'am able to retrieve data from Export Parameter..But not able to retrieve data from table
How to retrieve data from table(BOM_ITEM)..?
Cheers, all help would be greatly appreciated
VijayHi,
1. Create Page Process.
2. Select Data Manipulation
3. In category select "Automated Row Fetch"
4. Specify process name, sequence, select "On Load - Before Header" in point.
5. Specify owner, table, primary key, and the primary key column(Item name contains primary key).
6. Create a process.
7. In each item select "Database Column" in "Source Type".
Regards,
Kartik Patel
http://patelkartik.blogspot.com/
http://apex.oracle.com/pls/apex/f?p=9904351712:1
Maybe you are looking for
-
How do I disable the last update on my 2006 Mac book pro?
Ever since my computer automatically updated, I have had issues. I want to go back to the old.
-
I have a BB Curve that chirps when I am in the middle of a call. It doesn't matter if I am using my handset, if it is on speakerphone, or if I am using my bluetooth. Verizon sent me a replacement phone and it is still doing it. Is anyone else havin
-
Unable to configure email in N8
I got a new N8 a couple of days back. However, when I try to configure email over WiFi or GPRS/Edge, I get an error message saying - "Service Temporarily Unavailable. Try again later" I searched the forums and found that a few people with new C7s are
-
I purchased a movie on Apple TV and cannot find it on other Apple TVs in the house or on my ipad. It says I have no purchases, but I was watching it yesterday. The reception was so bad that I stopped and wanted to view it today. It has a link to o
-
Windows 8.1 RTM stuck on loading screen
HP Pavilion g6 2100sy I have problem Windows 8.1 RTM stuck on loading screen (clean install). No updates, drivers or programs not installed. Windows 8 works perfectly. Please help.