You might have seen the recent news reports about the collision between U.S. and Russian communication satellites. The U.S. satellite was one of the Iridium satellites. What wasn’t reported and you probably don’t know is that an object database management system (ODBMS) is an important part of the Iridium system. Even though ODBMSs are a [...]
February 13, 2009
I am now also posting on the Cutter Blog. My initial posting is (The Acronym) SOA is (Perhaps) Dead (at Some Companies); Long Live Services. It is a response to Anne Thomas Manes’ SOA is Dead; Long Live Services on her blog at the Burton Group.
January 9, 2009
The typical definition of an atomic task or process is one that cannot be decomposed further. This is vague and subject to interpretation. The Decomposition Matrix on this site uses a specific definition: A task (for business process diagrams) or a process (for data flow diagrams) is atomic if every input relates to every output [...]
December 3, 2008
My last posting referenced the criteria for a well-formed business process diagram mentioned in Business Process Driven SOA using BPMN and BPEL by Matjaz B. Juric and Kapil Pant. I am going to expand on their criteria to create a more comprehensive definition of a well-formed business process diagram.
To start, here are three criteria from [...]
November 18, 2008
I recently received two new books on business process modeling. Both books looked interesting because they had great titles. As it turns out, one book is great and the other not so good.
The not so good book is Business Process Driven SOA using BPMN and BPEL by Matjaz B. Juric and Kapil Pant. There are [...]
October 9, 2008
The Design Decomposition Blog is written by Doug Barry.
If you are in a situation where it makes more sense to convert the relational data to the object schema, then the equivalent views discussed earlier
will again be of use. Each of these equivalent views has a corresponding relational view.
See checking the class hierarchy (new
window).
The relational view can be used to access the data in the relational database.
The conversion process, however, will only use the relational views that correspond
with the classes at the bottom of the class hierarchy, the leaf classes described earlier (new
window). The converted data will be stored in these leaf classes. The classes in the object schema hierarchy above the leaf classes provide alternate ways to view or classify the data that is the equivalent to other views that existed in the relational schema.
To create a conversion program, use the single-valued views (the ones that use only one type code) to get the data from the
relational database and populate object instances for the appropriate leaf class in the object schema managed by the
Object DBMS (ODBMS). The upside of doing this is that you get the integration and performance provided by the ODBMS. The downside is that you will either convert the existing applications to access the ODBMS through an ODBC
or JDBC interface or develop new applications. Many ODBMS products provide ODBC
and JDBC interfaces. This allows the object data to appear as relational data, using the view equivalents that were presented earlier.
There are nearly 400 pages of articles on this site with over 50 pages on object-relational mapping.
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Object-Oriented Modeling and Design for Database Applications by Michael R. Blaha, William Premerlani Average Customer Review: based on 5 reviews. Customer Review: Great combination of hands-on and conceptual understanding of object oriented software development and database design/programming. If you are new to the object-oriented world and have experience with procedural programming and database applications, this is the book to get. It will take you directly to the object-oriented view and h...
Pro LINQ Object Relational Mapping in C# 2008 by Vijay P. Mehta Average Customer Review: based on 11 reviews. Customer Review: I am not sure what the 2 and 3 star reviews are about, because I thought this book was excellent, and considering the book says "intermediate" I'm not sure why people were expecting a "deep technical ORM, LINQ to SQL, or EF" book. The book is broken into 5 different parts: Part 1 - ORM Concepts - This is really good background for p...
Object-Oriented Database Design Clearly Explained by Jan L. Harrington Average Customer Review: based on 7 reviews. Customer Review: "Object Oriented Database Design" is a book for beginners and, as far as I have been able to investigate, it is a perfect walkthrough along the background of object structures. Figures, exemples, syntax of codes and clear explanations lead the learner through theory towards practice. Exemples are often very nice.
based on 5 reviews.
based on 11 reviews.
based on 7 reviews.