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From: emwalter@engin.umich.edu (Erin Walter)
Newsgroups: comp.databases.oracle.tools
Subject: trigger -> stored proc -> Java code
Date: 10 Oct 2001 12:37:04 -0700
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So, I am having a big problem.  The problem is that I created a
     trigger that fires after a insert into a table.  That trigger then
     calls a stored procedure which then refers to some Java code, please
     refer to code below for more information.  My problem is that when the
     blob comes into the Java code the length of the blob is 0 and I can
     not get any information out of it ...even though there is data in the
     blob in the database.  I REALLY need some help....I have been stuck
     for 3 days and asked everyone, including Oracle...if you know
     anything..PLEASE HELP!!!

     The code:

     I have a trigger that happends after an insert into a table. The
     trigger is:

       BEGIN
             IF (:new.nReplacedID > 0) THEN
             Replaced_Packet(:new.nOriginalPacketID, :new.nLoadID,
             :new.tSCETTime, :new.nPacketType, :new.sChannel, :new.nReplacedID,
             :new.oPacket);
       ELSE
             New_Packet(:new.nOriginalPacketID, :new.nLoadID,
             :new.tSCETTime, :new.nPacketType, :new.sChannel, :new.nReplacedID,
             :new.oPacket);
             END IF;
       END;

       Here's the stored Procedure:

       (nPacketID NUMBER, nLoadID NUMBER, tSCETTime DATE, nPacketType
     NUMBER,
       sChannel CHAR, nReplacedID NUMBER, oPacket BLOB)
       AS LANGUAGE JAVA NAME
       'Expand.Packet(int, int, java.sql.Date, int, java.lang.String, int,
       java.sql.Blob)';

       Here the beginning of the Java code:
       import java.io.*;
       import java.sql.*;
       import java.lang.*;
       import oracle.jdbc.driver.*;
       import oracle.jdbc.*;
       public class Expand
       {
       //*****************************************************************
       //*****************************************************************
       //***********************Packet********************************
       //Summary: This function is called when it is a new packet.
       //*****************************************************************
       //****************************************************************
       public static void Packet(int nOriginalPacketID, int nLoadID,
       java.sql.Date tSCETTime, int nPacketType, String sChannel, int
       nReplacedID, java.sql.Blob oPacket)
       {
             int fill_in;
             java.sql.Connection conn;
             System.out.println("beginning");
             try{
                     conn = new OracleDriver().defaultConnection();
                     long nblobLength = oPacket.length();//the length of the blob
                     System.out.println("the blob length is "+ nblobLength);
                     System.out.println("after");
             }catch(SQL Exception e){}
       }//end of the function
       }//end of the class

     ANY HELP would be appreciated!!!  Thank you for your time!