Oracle WebLogic Server Schema home

A not very known, but useful page:

A list of WLS schemas, from 10.3.1 till 12.1.3 :

http://www.oracle.com/webfolder/technetwork/weblogic/index.html

http://xmlns.oracle.com/weblogic/weblogic-ejb-jar
http://xmlns.oracle.com/weblogic/weblogic-web-app

Among others...

Different info can be retrieved from these schema URLs, and check their version progression, i.e.:

weblogic-application.xml

List of schema versions for http://xmlns.oracle.com/weblogic/weblogic-application

1.0 : Released with WLS v10.3.1.0
1.1 : Released with WLS v10.3.3.0
1.2 : Released with WLS v10.3.4.0
1.3 : Released with WLS v10.3.6.0
1.4 : Released with WLS v12.1.1.0
1.5 : Released with WLS v12.1.2.0
1.6 : Released with WLS v12.1.3.0

Oracle WebLogic Server 12c Advanced Administration Cookbook

The last book of WLS 12.1.1, Packt brings us a 285 pages product, a comfortable size, not very big neither a flyer, so, easy to read and search as a reference, kind of cookbook with high availability and clustering point of view.

First pages are very detailed in how to install and run a vanilla WLS domain (including Node Manager, Machines, etc.). Including WLST and Admin Console. Some aesthetic tips, but not sure if this ha Administrator flavor.

Later comes deployments in different approaches (tools actually:) ). Next Chapter about High Availability and Clustering fine grained; address listen, Broadcasting, Unicast, Multicast, etc.

Then JDBC, again with HA/Clustering thru WLST/Admin Console... here it is more verbose about algorithms, Parameters of Data Sources, Gridlink, Multidatasource, a must for any Admin.

JMS, focused to HA again, using all typical resources of it: Bridges, Persistent Stores, etc.

A good, perhaps more useful , about monitoring, tips & tricks on this which is not very documented, and this time is very admin focused. Then recipes for WLS 12.1.1 troubleshooting for OutOfMemory (a very common scenario).

Finishing with security & SSL, concurrent questions and answer on this topic (X.509 certificates, keystore, etc.)

I can say that has some known areas, but improves in another that many times are left for the user, and it doesn't appear in the official documentation.  

http://www.packtpub.com/oracle-weblogic-server-12c-advanced-administration-cookbook/book

Eclipse Juno GUI (Theme)

1.
To change to older theme:

General --> Appearance --> Theme: Classic.

2.
Also, I found in this blog that it can be changed at lower level:


plugins\org.eclipse.platform_4.2.0.v201206081400\css

to something like,
plugins\org.eclipse.platform_4.2.0.v201206081400\css.old

Eclipse & Proxy Config

Necessary config when being behind a Firewall/Proxy:

use MANUAL Active-provider under General->Network Connections.

Clean the SOCKS option and only set HTTP & HTTPS with proxy values.

Probably related to bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=281472

Dudeney's Star Puzzle

Tomado textual de mathpuzzle.com Alex Ravsky encontro una solucion mejor para un puzzle de Dudeney.

Similar como el caso de Klondike de Sam Loyd en los 70s.


The task of the star puzzle, ((X36 = AM329) according to the list [Knu] by Donald E.
Knuth) published a century ago in The Strand Magazine [Dud2], is to construct a path,
consisting of 14 straight strokes, on the following field of stars from one light star to the
other such that all the stars lay on the path.

Paper original puede ser obtenido en http://arxiv.org/abs/1205.0747

Four on a Match

Kadon has many fun puzzles and some contests.

by solving one of them, I received Four on a Match two years ago:

I think it was good time to publish it :P

Combinatorial Explosion

I think the discussion should have more emphasis in the best practice of using this kind of tool; Just like it is mentioned and used in the MatrixGame & TheLuckyString problems, we need to generate certain rules/filters to optimize the search. To look for all n! possibilities probably never will be a feasible solution. This is also called Combinatorial Explosion which verbatim refers to a growth almost impossible to sustain for the time of this type of TC problems.

So more important than the implementation ( which is assumed know -next_permutation()- that this is called Algorithm L in Knuth's TAOCP 4: 7.2.1.2) it is the good use some criteria for pruning combinations (permutations) and at the end we obtain a reasonable running time.

Many problems use this kind of booby-trap to let the programmer to try to solve with a plenty quick solution which runs over all permutations (or combinations) that finish with a timeout or an unnecessary overhead as resources used (such us memory).

The 25 Holes Challenge

Uno de los contests aun abiertos en Kadon es el basado en su juego Vee-21.

Mi solucion es:

Kadon Contests

Ademas de tener varios productos de muy buena calidad e ingenio ;)
Kadon tiene unos pequennos concursos, interesantes como desafio mental, a ver si se animan:

http://www.gamepuzzles.com/contests.htm

Oracle Certified Expert, Java EE 6 Web Component Developer

Despues de pasar el ex-SCWCD y ahora OCPWCD es el momento de ver lo nuevo de EE 6 y sobre todo acerca de Servlet 3.0: OCEJWCD

Lo interesante de este examen es que requiere un porcentaje mas bajo para poder pasarlo: 64%

http://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=458&get_params=p_track_id:JEE6WCD