ZKoss: tooltip for each item in the itemlist

vm.itemList is a list of strings and we need to show tooltip for each item in list. The first line defines listbox and sets paging mold...

wget from gradle script

Simple way to download file from gradle (via wget) task download(type: Exec) {      commandLine "wget", "http://somefi...

ZKoss: listbox tooltip

How to display tooltip for listbox in ZKoss? Tooltip is invisible for listbox or listitem in zkoss? <listbox mold="select"...

org.apache.hadoop.mapred.FileAlreadyExistsException: Output directory already exists

Sqoop job fails, complains that Output directory already exists: [cloudera@quickstart ~]$ sudo -u hdfs sqoop job --meta-connect jdbc:hsql...

IntelliJ Idea keyboard shortcuts in Eclipse

I've used InteliJ idea for development, but now I have to use Eclipse. It's quite pity, because I've forgot almost all ecli...

Hadoop Distributed File System (HDFS)

Hadoop Distributed File System (HDFS) is a Java-based file system that provides scalable and reliable data storage that is designed to span...

[BASH] Add folder to $PATH if not there already

if [[ ":$PATH:" != *":/some/folder:"* ]]; then PATH=${PATH}:/some/folder; fi

Maven jetty:run in intellij idea: java.lang.OutOfMemoryError: PermGen space

Often time, IntelliJ Idea with maven jetty plugin may hits the following  java.lang.OutOfMemoryError: PermGen space  error when trying to...

Spring: how to print all bean names from ApplicationContext?

How to get all bean ids from the Spring Application Context and print to console. Needed sometimes for debugging purposes :) 1 2 3 4 ...

Expose POJO as MBean in Spring (JMX)

There are lots of tutorials for this purpose (for example: this link ), but I was not able to figure out working solution from the spot. ...

WebDriver: constructor with both FirefoxBinary and DesiredCapabilities

Short example for WebDriver construction for Firefox using both FirefoxBinary and DesiredCapabilities. Needed for example if you are going...

How to monitor remote java app via JMX

Let's assume, we have some remote server and java application run there. We also have VisualVM on our localhost ,machine and just wan...

Java source code highlight on-line tools

Looking for java source core highlighting online tool. Now using this one:  http://hilite.me Code highlight example (HelloWorld.java):

logback e-mail appender example

An example for logback email appender (logback SMTP appender) configuration. Short description for some elements:  filter is for sen...

EntityManager.merge() issue: does not store to DB

Strange issue happened when tried to store some entity to database using entityManager.merge() or entityManager.persist() - code seemed t...

Apache Maven for SoftServe IT Academy

My 1st presentation for SoftServe ITA  (April, 7 2014) Apache Maven for SoftServe IT Academy from Volodymyr Ostapiv

JPA for testing in Maven: persistence.xml in test/resources

For Maven testing with JPA we need to have persistence.xml file located in the in src/test/resources and that is not good sometimes, beca...

maven-shade-plugin hints

Maven shade pludin (maven-shade-plugin) is used for creating single executable JAR file with all dependencies (libraries) inside. Works a...

Run console command from Java

To run console command from java do the following: 1. Command interpreter string:  private static final String[] COMMAND_INTERPRETE...

How to pack jsp file into *.WAR

How to pack jsp file into *.WAR  web applicatoion (jboss deployable): # jar -cvf browser.war Browser.jsp This command creates ME...