DML with sqlj in app.module

Question

I do DML with the help of stored pl/sql procedures (in packages), and I'm building a bc4j application.
I do custom doDML methods for the entities, and I would like to get use of the generated sqlj wrapper classes for my stored packages.
Is this possible, or do I have to do all in jdbc? How?
Thanx in advance:
Tib

Answer 1

I'm not sure I understand your question correctly, but I will try to answer as I understand it.
The BC4J framework takes care of the DML operations such as insert, update, delete, commit, etc.
If there are additional operations you want to perform, you can create custom methods on either the view object, or the application module, and then export those custom methods and call them from your client. I've included some sample code below for a custom method that calls a stored procedure, and then how I call that method from a JSP client:
package wt_bc;
// --- File generated by Oracle Business Components for Java.
import oracle.jbo.server.*;
import java.sql.*;
import oracle.jbo.RowIterator;
public class wtQueryViewImpl extends oracle.jbo.server.ViewObjectImpl implements wt_bc.common.wtQueryView{
* This is the default constructor (do not remove)
public wtQueryViewImpl() {
public int getTotalHits(String mon, String year) {
CallableStatement stmt = null;
int total;
String totalhits = "{? = call walkthru.total_hits(?,?)}";
stmt = getDBTransaction().createCallableStatement(totalhits, 1);
try
// Bind the Statement Parameters and Execute this Statement
stmt.registerOutParameter(1,Types.INTEGER);
stmt.setString(2,mon);
stmt.setString(3,year);
stmt.execute();
total = stmt.getInt(1);
catch (Exception ex)
throw new oracle.jbo.JboException(ex);
finally
try
stmt.close();
catch (Exception nex)
return total;
This method is called from my JSP client through a custom web bean:
package wt_bc;
import java.io.*;
import oracle.jbo.*;
import oracle.jdeveloper.html.*;
import wt_bc.common.wtQueryView;
public class GetTotals extends oracle.jdeveloper.html.DataWebBeanImpl {
public void render() {
int totalhits;
try
Row[] rows;
// Retrieve all records by default, the qView variable is defined in the base class
qView.setRangeSize(-1);
qView.first();
rows = qView.getAllRowsInRange();
// instantiate a view object for our exported method
// and call the stored procedure to get the total
ViewObject vo = qView.getViewObject();
wtQueryView theView = (wtQueryView) vo;
totalhits = theView.getTotalHits(session.getValue("m").toString(),session.getValue("y").toString());
out.println(totalhits);
} catch(Exception ex)
throw new RuntimeException(ex.getMessage());
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