Advanced Queuing - Oracle

General Features of Advanced Queuing
CREATE OR REPLACE TYPE orderitemlist_vartyp AS VARRAY (20) OF orderitem_typ;
An order is modeled as an object type called order_typ. The order type is a
composite type that includes nested object types defined earlier. The order type
captures details of the order, the customer information, and the item list.
CREATE OR REPLACE TYPE order_typ as object (
orderno NUMBER,
status VARCHAR2(30),
ordertype VARCHAR2(30),
orderregion VARCHAR2(30),
customer CUSTOMER_TYP,
paymentmethod VARCHAR2(30),
items ORDERITEMLIST_VARTYP,
total NUMBER);
Some queues in the BooksOnline application model an order using a
SYS.XMLType payload.
Visual Basic (OO4O): Example Code
Use the dbexecutesql interface from the database for this functionality.
Java (JDBC): Example Code
After creating the types, use JPublisher to generate Java classes that map to the SQL
types.
1. Create an input file "jaqbol.typ" for JPublisher with the following lines:
TYPE boladm.customer_typ as Customer
TYPE boladm.book_typ as Book
TYPE boladm.orderitem_typ AS OrderItem
TYPE boladm.orderitemlist_vartyp AS OrderItemList
TYPE boladm.order_typ AS Order
2. Run JPublisher with the following arguments:
jpub -input=jaqbol.typ -user=boladm/boladm -case=mixed -methods=false
-compatible=CustomDatum
This will create Java classes Customer, Book, OrderItem and OrderItemList that
map to the SQL object types created earlier:
3. Load the Java AQ driver and create a JDBC connection:
public static Connection loadDriver(String user, String passwd)
A Sample Application Using AQ 8-13