Ora et Collabora

From time to time, I forget where the expression view can be set in Eclipse... it's right here in the Window panel 

View by projects or working sets in Eclipse...always comes in handy!

While I was typing the final "ant all" command for hybris, it miserably failed with the following exception hybris/bin/platform/resources/ant/antmacros.xml:123: java.lang.UnsupportedClassVersionError: de/hybris/ant/taskdefs/DbDriverValidator : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) Even though a "java -version" gave me back version 8, ant is still using $JAVA_HOME variable. So you have to change it into the script. My suggestion is that you adapt the setantenv.bat script with the JAVA_HOME directly @echo off set ANT_OPTS=-Xmx512m -Dfile.encoding=UTF-8 set ANT_HOME=%~dp0apache-ant-1.9.1 set JAVA_HOME=C:/Program Files/Java/jdk1.8.0_101 set PATH=%ANT_HOME%\bin;%PATH% rem deleting CLASSPATH as a workaround for PLA-8702 set CLASSPATH= echo Setting ant home to: %ANT_HOME% ant -version

I spent the whole afternoon trying to set up a Oracle Express instance without any success. I had the drivers installed, but I could not uninstall them. It looked like the main instance was not correctly set up. After looking around, I noticed that even after complete uninstall of Oracle XE still the ORACLE_HOME environment variable was still there. I tried again manually removing it from System Variables and then reinstalling... and it finally worked!

I needed to make a query to find all records valid today for columns with effectiveFrom and effectiveTo range I spent a couple of hours trying to understand why             criteria.add(Restrictions.ge("effectiveFrom",currentDate.getTime()));             criteria.add(Restrictions.le("effectiveTo",currentDate.getTime())); was giving no results. After many trials and attempts with other criteria tricks, I remembered that hibernate is not comparting if  currentDate.getTime is greater than effectiveFrom, but if effectiveFrom is greater than currentDate.getTime So correct sintax for it was the exact opposite             criteria.add(Restrictions.le("effectiveFrom",currentDate.getTime()));             criteria.add(Restrictions.ge("effectiveTo",currentDate.getTime())); This one worked as it should 

Always good as a refresher. So, when calling a method For primitive arguments ( int ,  long , etc.), the pass by value is  the actual value  of the primitive (for example, 3). For objects, the pass by value is the value of  the reference to the object . http://stackoverflow.com/questions/40480/is-java-pass-by-reference-or-pass-by-value

I stumbled upon this one, as a rookie :) http://www.programcreek.com/2014/01/java-util-concurrentmodificationexception/ whohaaa, it hurts :)

I was behind a corporate firewall and had to run gradlew (gradle) from Cygwin. The system was running a cntlm authentication proxy. I ran the following command export http_proxy=http://127.0.0.1:3128/ export https_proxy=$http_proxy Then I ran ./gradlew -Dhttps.proxyHost=127.0.0.1 -Dhttps.proxyPort=3128 -Dhttp.proxyHost=127.0.0.1 -Dhttp.proxyPort=3128 I hope it helps 

Did you know hat  pressing CTRL + directional arrows allows you to browse a text document by skimming entire words? This discovery is going to change my life!

Following the advice from a very expert consultant, I changed my views from an UNION between two select from the same table to UNION ALL and the performance improvements were simply amazing. Before doing so, I had verified that the query were returning different results with the INTERSECT command before doing so. The difference is that UNION verifies that records are unique, while UNION ALL doesn't. The performance gain is very remarkable 

I just discovered that TNS names in Oracle stand for "Transparent Network Substrate". I feel so happy that I need to share this "secret" with the rest of the universe.

Always useful link http://rayfd.me/2007/05/20/10-eclipse-navigation-shortcuts-every-java-programmer-should-know/

I spent some days trying to call a Stored Procedure through Hibernate. I used CreateSQLQuery  and I made my own custom transformer, but I could not get it work. I keep geeting Wrong Type and Parameter of procedure exception. My procedure was like the following     procedure GET_BY_EMPLOYEE (         P_EMPLOYEE_ID   in       EMPLOYEE_ID%TYPE       , P_DATE_FROM  in       date       , P_DATE_TO    in       date       , P_REF           out      CURSORREFERENCETYPE); After days of searching, I found this http://docs.jboss.org/hibernate/orm/4.2/devguide/en-US/html/ch13.html#sp_query For Oracle the following rules apply: A function must return a result set. The first parameter of a procedure must be an  OUT  that returns a result set. This is done by using a  SYS_REFCURSOR ...

This really bugged me for a while, code formatting was quite miserable outside of the editor. You just have to go into --> preferences --> editor --> Text Editors

For my own fun, I was playing around with bitcoin, to check how the parameters of the cryptocurrencies can be modified. After recent upgrades to my OS, I could not build any longer the bitcoind. Seems like something changed on that side. Now this command ./configure --with-gui=qt5 --enable-debug Was sistematically producing  configure: error: OpenSSL ec header missing EC is the file for elliptic curve cryptography. I had brew correctly configured, and the header files were all correctly present. After some time spent inspecting the issue, on github I was able to find the solution for this problem. I simply add to export the following export LDFLAGS=-L/usr/local/opt/openssl/lib export CPPFLAGS=-I/usr/local/opt/openssl/include There is aksi pull request on bitcoin for that, I hope I could save you some time https://github.com/bitcoin/bitcoin/pull/6885/files?diff=split&unchanged=expanded

Just for fun, I am giving a look to the new "Swift" programming language from Apple. I have to say it looks pretty cool. Type inference, tuple, and optionals can really save a lot of time during development. I am really eager to try it more extensively. 

I was trying to use Maven Release Plugin on my cygwin to upload a versioned library into my archiva repository. I was keep and keep getting this exception. svn: E175002: Processing OPTIONS request response failed: Premature end of file. (/) svn: E175002: OPTIONS request failed on '/'         at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)         at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)         at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)         at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)         at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)         then I noticed that in my pom files I had the following scm connection ...

Immaginate se Ludwig Beethoven, anzichè nascere a Bonn negli anni 70 del settecento, per uno scherzo del destino fosse nato un po' piu' giu', mettiamo da qualche parte in Lazio, e appena qualche anno dopo, mettiamo un paio di secoli. Beethoven si siede, ha una grandissima idea, comporrà la nona sinfonia. Si siede sul tavolo è ispiratissimo, sente proprio la melodia scorrergli nelle vene e riempirgli il cuore...driin driin, un poke su facebook della sua amica, quella stronza profumiera di Elisa, che sono anni che gli ronza attorno e non gliel'ha data mai. "Ke fai?" "Elisa, sto componendo la nona sinfonia". "Xke', le altre otto che hanno fatto? Ci facciamo un giro all'iper?". "Non posso, sto lavorando". "E dai vieni che ti faccio conoscere uno che mi piace". Maledetta...giocare cosi' con i suoi sentimenti... attacca. Ritorna a scrivere, la melodia torna potente nel cuore, una nota, poi l'altra, poi...

Trivial task, but still can save some time to somebody, so I am gladly sharing. A friend of a mine has an huge json file, and she had to extract all unique value for a field called "title".  The file was too big to be processed from a notepad or an excel. With those comands, I was able to obtain a clean, unique and sorted list list of all the content. grep -o -E '"title":"[^"]+",' tmp.json | sort |uniq > output.txt sed -i 's/"title":"//g' output.txt sed -i 's/",//g' output.txt

Time for changes, you know... but I have good news!  The redbook "Building and implementing Social Digital Experience", one I had the honor to co-author, is finally out! http://www-10.lotus.com/ldd/portalwiki.nsf/xpDocViewer.xsp?lookupName=IBM+Redbooks%3A+Building+and+Implementing+Social+Digital+Experiences#action=openDocument&content=catcontent&ct=redbooks