SimpleBMPBean.java

package com.sun.s1asdev.jdbc.fetchoutofseq.ejb;

import javax.ejb.*;
import javax.naming.*;
import javax.sql.*;
import java.rmi.*;
import java.util.*;
import java.sql.*;

public class SimpleBMPBean
    implements EntityBean
{

    protected DataSource ds;

    public void setEntityContext(EntityContext entityContext) {
	Context context = null;
	try {
	    context    = new InitialContext();
	    ds = (DataSource) context.lookup("java:comp/env/DataSource");
	} catch (NamingException e) {
	    throw new EJBException("cant find datasource");
	}
    }

    public Integer ejbCreate() throws CreateException {
	return new Integer(1);
    }

    public boolean test1() {
        return issueQuery( true );
    }

    public boolean test2() {
        return issueQuery( false );
    }

    /**
     *
     * If a connection's autocommit is set to true and we attempt a select
     * for update sql query, Oracle throws a "ORA-01002: Fetch out of sequence"
     * exception. This test tries to :
     * 1. get a connection using getNonTxConnection API and try a "select for
     * update" query. Since a connection obtained using getNonTxConnection
     * is not managed (transaction-wise), its autocommit is set to true by
     * default. So this fails.
     * 2. gets a connection as above but sets its autocommit to true. The 
     * query will then pass.
     */
    public boolean issueQuery(boolean autoCommit) {
        Connection conn = null;
	PreparedStatement stmt = null;
        boolean passed  = (autoCommit ? false : true);
	try {
	    //conn = ds.getConnection();
	    conn = ((com.sun.appserv.jdbc.DataSource)ds).getNonTxConnection();
	    if ( !autoCommit ) {
	        conn.setAutoCommit( false );
	    }
	    stmt = conn.prepareStatement("SELECT c_id, c_phone FROM O_CUSTOMER FOR UPDATE OF c_id");
	    stmt.executeQuery();
	} catch (Exception e) {
	    if (autoCommit) {
	        passed = true;
	    } else {
	        passed = false;
	    }
	    e.printStackTrace();
	} finally {
	    if (stmt != null ) {
	        try {stmt.close();} catch(Exception e1) {}
	    }
	    if ( conn != null ) {
	        try { conn.close(); } catch( Exception e1) {}    
	    }
        } 
        
	return passed;
    }
   

    public void ejbLoad() {}
    public void ejbStore() {}
    public void ejbRemove() {}
    public void ejbActivate() {}
    public void ejbPassivate() {}
    public void unsetEntityContext() {}
    public void ejbPostCreate() {}
}