Did you ever wondered which from which encoding the query parameters are parsed by default in java (servlet) and the response in rendered? Say UTF-8. Wrong. Try ISO-8859-1. There are 3 cases to consider:
1. Query parameters as GET
2. Query parameters as POST
3. Response encoding. (more…)
In my stupidity innocence I just hoped that deploying the application on the new JBoss (from 4.2.2-GA to 5.1.0-GA) should be just a simple matter of changing paths in ant. Here are some problems I encountered and was able to fix. (more…)
Target: create a test environment for JBoss JAAS authentication using LDAP.
Platform: Linux Ubuntu 9.10, JBoss 4.2.2.GA, java 1.6.0_15
Installing ldap proved to be the most complicated part as apparently Karmic stripped all ldap configuration from the install so all tutorials found on ubuntu site are useless. Finally I’ve found a thread which described the process. Here are the steps I followed: (more…)
Trying to run Apache Directory Studio I’ve found that eclupse crashes in ubuntu karmic 9.10 with the following error:
# # An unexpected error has been detected by HotSpot Virtual Machine: # # SIGSEGV (0xb) at pc=0x00d64856, pid=8870, tid=3077867296 # # Java VM: Java HotSpot(TM) Client VM (1.5.0_11-b03 mixed mode) # Problematic frame: # C [libpango-1.0.so.0+0x23856] pango_layout_new+0x36 #
I’ve tried running it with different java version and with the GDK_NATIVE_WINDOWS=1 with no luck and found the problem unanswered on lot of sites. Finally the solution required to disable the Assistive Technologies (System -> Preferences -> Assistive Technologies). After that everything works ok.
Here are some reflections and solutions on how to localize strings in hibernate objects.
I am assuming the localized strings will be stored in the database in a structure similar to:
Table MY_OBJECT:
Table LOCALIZED_DATA:
A few years ago I was writting some simple tutorials about using hibernate with tapestry to build a simple application. I’ve used Tapestry 3, 4 and I found it reliable to build applications which are still in production. I could consider myself a Tapestry fan and as such I am disappointed a bit to write this article since I was expecting to find no need for it. My goal was to build a simple example of Tapestry – Hibernate application using Tapestry 5. (more…)
Assume you are dealing with a hibernate operation which requires to copy a lot of objects in the database. For instance you are having 2 objects as described in the diagram bellow: budget and entries and you want to duplicate the budget and all it’s entries for some operation. There are several way to do this.
Budget - entries
In hibernate usual approach this is done most of the time as something similar to: (more…)
Since everybody seemed to be stuck with using the library on windows and yet on linux it worked from the start I’ve decided to dive into the wonderful world of windoze. (more…)
This is something which should be know be every java developer: how to enable remote debugging of your java application. The solution is remarcable simple:
export JAVA_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n"
and the start your application normally. You can use your IDE of choice for the debugging. Here is a screenshot of the eclipse configuration:
Remote java debug
When using flex and java in parallel the localization mechanism might be clear. One aspect which is not clear is the encoding of the properties files:
Convertor script:
..$ cat fixUTF.sh #!/bin/bash TMP=iconv.tmp if [ "!$2" == "!rev" ]; then iconv -t ISO_8859-1 -f UTF-8 -o $TMP $1else iconv -f ISO_8859-1 -t UTF-8 -o $TMP $1fimv $TMP $1
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