Sergey Kabashnyuk

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

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. Import exo.jcr.core project into the Eclipse. 2. Open dialog Run -> Debug configurations
Select Project: "Name of the imported project"
Main Class: org.codehaus.classworlds.Launcher
3. Insert Arguments
Program arguments: -Dexo.test.forkMode=never -Dexo.tck.skip=true -Dexo.test.skip=false clean test
VM arguments: -Xmx300m -Dclassworlds.conf="${M2_HOME}/bin/m2.conf" -Dmaven.home="${M2_HOME}"
4. Add classwords jar to the classpath.
5. Add required sources.
6. Run debug

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
       }