Sergey Kabashnyuk

JAVA: Подсчёт времени выполнения метода через аннотацию http://bit.ly/bgsZXU

If you want to be able to open rar(resource archive file not WinRAR archive file) files
with Midnight Commander.
Change

from

# rar
regex/\.[rR]([aA][rR]|[0-9][0-9])$
 Open=%cd %p#urar
 View=%view{ascii} rar v -c- %f

to

# rar
regex/\.[rR]([aA][rR]|[0-9][0-9])$
 Open=%cd %p#uzip
 View=%view{ascii} unzip -v %f

in /etc/mc/mc.ext or
/usr/local/etc/mc/mc.ext

If you have

28.11.2009 21:16:25 *ERROR* [Timer-2,JBoss-Cache-Cluster_db1tck_ws,127.0.0.1:7800] MPING: failed sending discovery request (MPING.java, line 346) 
java.io.IOException: Invalid argument
at java.net.PlainDatagramSocketImpl.send(Native Method)
at java.net.DatagramSocket.send(DatagramSocket.java:612)
at org.jgroups.protocols.MPING.sendMcastDiscoveryRequest(MPING.java:341)
at org.jgroups.protocols.PING.sendGetMembersRequest(PING.java:259)
at org.jgroups.protocols.Discovery$PingSenderTask$1.run(Discovery.java:407)
at java.util.concurrent.Executors$RunnableAdapter.
 

on Ubuntu 9.10 or over operation system  try to run you application with

-Djava.net.preferIPv4Stack=true

This happens because  JGroups does work with IPv6.

Great news: Lucene 3.0 is out!!

The new version is mostly a cleanup release without any new features. All deprecations targeted to be removed in version 3.0 were removed.

See CHANGES.txt   for details.
Binary and source distributions are available here

1. Eclipse installation. Different Eclipse builds for different needs can be found  "Eclipse Downloads". I preferred Eclipse IDE for Java Developers or Eclipse IDE for Java EE Developers. More about difference you can found.  

2. Unpack you archive

   tar -zxvf eclipse-jee-galileo-linux-gtk.tar.gz

3. Installation of subversion client for eclipse.  Start Eclipse. Go to the menu Help ->Install new software -> Add ..  Add update site http://download.eclipse.org/technology/subversive/0.7/update-site/. Install Subversive SVN Team Provider.

4.  After Eclipse restart go the menu Window -> Preferences -> Team -> SVN When you first use the menu, you will be prompted to install connectors. Check SVN Kit 1.2.3.

5. Now you are ready to use Subversive plugin. Checkout some versioned project. For example http://anonsvn.jboss.org/repos/exo-jcr/
6. With help maven-eclipse-plugin create eclipse project.
7. Import new project to eclipse workspace. File->Import->Existing Projects into Workspace.
8. Set class path variables. Go to the Window -> Preferences -> Java -> Build Path ->  Class path variables. Add new variable M2_REPO  with the value of the path to your maven repository

Links :

1. How to setup Eclipse debug for eXo JCR core (maven project)

TODO for part 2

1. Java installation on Ubuntu
2. Maven installation

1. Аviagid 
2. Altis
3. Britishairways

Original source Alexey Zavizionov

To unpack the archive in the form *. tar.gz use the command:

tar xvfz *. tar.gz

Used in the command keys

• x - allows you to retrieve files from the archive.
• v - concludes tar detail. This means that the screen will be displayed all found in the archive files. If this option is omitted, the output of the processing will be limited.
• f - is a mandatory option. Without it, tar tries to use tape instead of the archive file.
• z - lets you handle archive, compressed gzip (with extension. gz). If you omit this option, tar will report an error. Conversely, this option should not be used for uncompressed files.

1. Add source

   deb http://deb.opera.com/opera/ etch non-free

2. Add key

   wget -O - http://deb.opera.com/archive.key | sudo apt-key add -

3. (If you get "The following packages cannot be authenticated" warnings, you'll also need this:)

   sudo apt-get install debian-archive-keyring

More links:

OperaBrowser ubuntu wiki

Opera official site

     Small "how to" to upgrate skype to version "Skype 2.1 Beta for Linux"

1. Download latest version

   http://www.skype.com/download/skype/linux/choose/

2. Remove old one

     sudo apt-get remove skype skype-common

3. Install new one.

If use Eclipse update mechanism (Eclipse Java EE IDE for Web Developers.  Build id: 20090621-0832) for installing ANTLR IDE and you can't find  any categories you should uncheck "Group items by category" checkbox, everything will be working correctly.

When I tried to run Jprofiler , I received : exception in thread "main" java.lang.InternalError: libXt loaded before libXm .

Exception in thread "main" java.lang.InternalError: libXt loaded before libXm
 at java.lang.ClassLoader$NativeLibrary.load(Native Method)
 at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1751)
 at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1668)
 .....

Workaround is to change AWT_TOOLKIT. You should add “export AWT_TOOLKIT=XToolkit” to you jprofiler5/bin/jprofiler file.

LD_LIBRARYN32_PATH="$app_home/bin/linux-x86:$LD_LIBRARYN32_PATH"
LD_LIBRARYN64_PATH="$app_home/bin/linux-x86:$LD_LIBRARYN64_PATH"
export LD_LIBRARY_PATH
export DYLD_LIBRARY_PATH
export SHLIB_PATH
export LIBPATH
export LD_LIBRARYN32_PATH
export LD_LIBRARYN64_PATH
export AWT_TOOLKIT=XToolkit

This Java tips illustrates a method of copying one file to another file through channel. A channel is created both on source as well as destination and then the file is copied between those two channels.

   try {
           // Create channel on the source
           FileChannel srcChannel =
             new FileInputStream("srcFilename").getChannel();
      
           // Create channel on the destination
           FileChannel dstChannel =
             new FileOutputStream("dstFilename").getChannel();
      
           // Copy file contents from source to destination
           dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
                   // Close the channels
         srcChannel.close();
         dstChannel.close();
       } catch (IOException e) {
         //TODO catch exception
       }