8:00 – 3:30 CSIP

• Hibernate chapter 6
• Chapter 7. Learning about annotations like all the other cool kids. Done. Chapter 8 on Monday.

8:00 – 4:00 CSIP

• Hibernate Chapter 3. Working on getting to chapter 8, which covers dynamic creation. “Chapter 8 discusses criteria queries, an interesting mechanism that lets you express the constraints on the entities you want, using a natural Java API. This lets you build Java objects to represent the data you want to find, which is easier for people who aren’t database experts to understand; lets you leverage your IDE’s code completion as a memory aid; and even gives you compile-time checking of your syntax. It also supports a form of “query by example,” where you can supply objects that are similar to the ones you’re searching for, which is particularly handy for implementing search interfaces in an application.“
• Chapter 4
• Tried to change a query from foo = :upper(mySearchTerm) to foo like ‘%upper(mySearchTerm)%’ and failed completely. Dong suggested restrictions, but I don’t see how to do that in the hbm.xml <![CDATA[…]]> section.
• Chapter 5
• Chapter 6

8:00 – 4:30 CSIP

• Taking a small detour into Hibernate, to see if that can create a Java Object that Drools can operate on.
• Some relevant articles from 2008-2009, also here
• Installing hibernate eclipse plugins from here. Well I thought I was. It appears there is a conflict with Ant. Which is funny, because the book “Harnessing Hibernate” has all their examples built with Ant. It is to laugh.
• Hmm. Ant using Maven is kind of nice. Definitely more explicitly clear. it depends on maven-ant-tasks-2.0.6.jar that needs to reside in the Ant library. And if you add a link to that library as an external jar in the Ant preferences in Eclipse, it seems to work quite well.
• Well, not quite. The 2.0.6 jar only points to the default .m2/repository. You need the 2.1.3 jar if you want that to work. And that took 2 hours. Grr. Somebody should update the Safari book code repository.
• Chapter 1
• Chapter 2
• Chapter 3

8:00 – 1:30, 3:30 -6:00  CSIP

• Ok ,now that we have working(?) code, I have something to walk through while reading the book.
• The Drools team suggests that you use the joda DateTime library. It looks pretty nice, too – http://joda-time.sourceforge.net/. They also have a bunch of other interesting libraries at http://joda.sourceforge.net/
• Setting a global value in a rule
• Java

  // Import the class
  import droolsbook.bank.service.BankingInquiryService;
  
  // create the session
  static StatelessKnowledgeSession session;
  
  // create rule engine
  KnowledgeBaseConfiguration configuration = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
  KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase(configuration);
  
  // declare our global
  BankingInquiryService inquiryService = new BankingInquiryServiceImpl();
  
  // make a session
  session = knowledgeBase.newStatelessKnowledgeSession();
  
  // add the global to the session
  session.setGlobal("inquiryService", inquiryService);

• Drools rule (.drl file)

  // import
  import droolsbook.bank.service.*;
  
  // declare
  global BankingInquiryService inquiryService;
  
  // use the global in a rule (note the surrounding eval(), which can evaluate any code that returns a TRUE or FALSE).
  rule "accountNumberUnique"
      when
          $account : Account(eval(!inquiryService.isAccountNumberUnique($account)))
      then
          error(kcontext, $account);
  end

• Chapter 4
• Hmm. com.ibatis.sqlmap.client.SqlMapClient looks interesting.
• After poking around, I think I found something better. Castor appears to do XML/SQL/other(?) data binding with Java. IBM appears to have a nice set of articles.
• And Hibernate may now be able to do this as well.
• Nice data visualization using webGL
•