Ant + Log4j

Hibernate’s SchemaExportTask ant task always gives very informative error messages (not! Smiling). Here’s an example:

BUILD FAILED
build.xml:267: Schema text failed: Could not parse mapping document from file SomeClass.hbm.xml

To get some useful info on what went wrong we need to specify a log4j configuration file:

niklas@niklas:~$ ANT_OPTS=-Dlog4j.configuration=file:///path/to/log4j.properties ant some-task

Don’t forget file://!

Here’s a simple log4j.properties file you could use:

log4j.rootLogger=DEBUG, consoleAppender
log4j.appender.consoleAppender=org.apache.log4j.ConsoleAppender
log4j.appender.consoleAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.consoleAppender.layout.ConversionPattern=%d [%t] %-5p %c %x - %m%n

Spring and named constructor arguments

I’m a big fan of Spring and I’ve been using various parts of it now for the last two and a half years. Using the Spring dependency injection container has indeed made my life (as a programmer, of course Eye-wink) a lot easier. In this post I will demonstrate a technique which could be incorporated into Spring to add support for constructor injection using named parameters. The same technique could also be useful for scripting languages like Jython and Groovy to add support for calling Java methods using named parameters. Continue reading

Downloading YouTube movie clips to your local hard drive

I tried to watch this YouTube clip the other day but found that my flash player had a hard time synching the audio and video. Very annoying! And as far as I can see YouTube doesn’t provide a download link to let me download the movie and play it directly from my hard drive. I really wanted to see this clip but couldn’t stand the audio lagging behind. I figured there must be a way to hack that flash thing they are using to play the movie. It turned out to be quite easy! Continue reading

Rotating video clips shot in "portrait" mode

When using my Canon IXUS 40 digital camera to record short videos I sometimes accidently rotate the camera 90 degrees. Of course this isn’t a problem when taking photos since it’s very simple to rotate an image using Photoshop, GIMP, ImageMagick, etc.

The solution might seem less obvious when dealing with video files. Fortunately, there’s this great tool called mencoder (which is part of MPlayer) which let’s us fix things like this: Continue reading

Slutet gott…

Vi närmar oss slutet på vår USA-resa när vi nu sitter på flygplatsen i New York. Sammanfattningsvis har det varit mycket lyckat. Trots missen med biljetterna mellan LA och NY kom vi med den sedan innan planerade flighten. I NY har vi hälsat på frihetsgudinnan (hon verkade lite stel, men så kan det ju vara när man får främmat). Se vidare bifogad bild. Tyvärr missade vi vad som skulle kunna ha varit en helt fantastisk konsert med Antony and the Johnsons. Biljetterna var helt slutsålda. Att vara ute i god tid är nog ett bra tips i NY. För övrigt har det varit jävligt varmt och jävligt mycket folk och jävligt många tutande bilar och… någon som tror att vi tycker det är skönt att komma hem till gamla Svedala?