Bits And Pix

In the Web.xml

 <web-app>
  <session-config>
    <session-timeout>60</session-timeout>
  </session-config>
...
 </web-app>

Ant Task Overview

Delete

<delete>
   <fileset dir="WEB-INF/lib" includes="**/some*.jar" excludes="**/some-other*.jar" />
</delete>

Ant Delete Doc

Copy

<copy todir="../new/dir">
    <fileset dir="src_dir"/>
</copy>

<copy todir="../dest/dir">
    <fileset dir="src_dir">
      <exclude name="**/*.java"/>
    </fileset>
</copy>

<copy todir="../dest/dir">
    <fileset dir="src_dir" excludes="**/*.java"/>
</copy>

Ant Copy Doc

Set a WebApp directly from directory (without .war file)

    <!-- =========================================================== -->
    <!-- Set handler Collection Structure                            -->
    <!-- =========================================================== -->
    <Set name="handler">
      <New id="Handlers" class="org.eclipse.jetty.server.handler.HandlerCollection">
        <Set name="handlers">
         <Array type="org.eclipse.jetty.server.Handler">
           <Item>
             <New id="akuiContext" class="org.eclipse.jetty.webapp.WebAppContext">
                <Set name="contextPath">/mywebapp</Set>
                <Set name="resourceBase">/path/to/single/mywebapp</Set>
             </New>
           </Item>
         </Array>
        </Set>
      </New>
    </Set>

Remote Debuging

#format: -agentlib:jdwp=name1[=value1],name2[=value2]...
java -agentlib:jdwp=transport=dt_socket,server=y,address=8000,suspend=n start.jar

help: prints a brief message on how to use it and exits the VM.

server: (”n” or “y”) If “y,” listen for a debugger application to attach; otherwise, attach to the debugger application at the specified address.

address: transport address for the connection. If server=n, attempt to attach to a debugger application at this address. If server=y, listen for a connection at this address.

timeout: If server=y, this specifies the timeout, in milliseconds, to wait for the debugger to attach. If server=n, this specifies the timeout, in milliseconds, to use when attaching to the debugger.

suspend: If “y,” JVM suspends the execution until a debugger connects to the debuggee JVM.

More info: Techrepublic and Source: StackOverflow

Other links

• Jetty Classloading / Classloader
• Configuration Tips
• Virtual Hosting Configuration
• Jetty Start.jar source

Skip Test

mvn -Dmaven.test.skip=true package

Official JBoss Repository for Hibernate and more

<repository>
 <id>jboss-repository-group</id>
 <name>jboss-repository-group</name>
 <url>https://repository.jboss.org/nexus/content/groups/public/</url>
 <layout>default</layout>
</repository>

Note: the “http://repository.jboss.org/maven2/” is deprecated. Use the above one (Announcement, Getting Started Doc ).

Publishing Artifacts to Central Repository

• Guide: Central Repository Upload
• Nexus OSS Hosting

Other Links

• Introduction to Optional and Excludes Librairies

Parsing CSV is not as simple at it seems. Not hard, but cumbersome.

Here is a simple Lib that does the job: Open CSV (download)

CSVReader reader = new CSVReader(new FileReader(ADDRESS_FILE));
String [] nextLine;
while ((nextLine = reader.readNext()) != null) {
	System.out.println("Name: [" + nextLine[0] + "]\nAddress: [" + nextLine[1] + "]\nEmail: [" + nextLine[2] + "]");
}

• Java Validation JS303 Implementation: Hibernate Validator Doc, Download

Yes, File.renameTo is used to move file.

// File (or directory) to be moved
    File file = new File("filename");

    // Destination directory
    File dir = new File("directoryname");

    // Move file to new directory
    boolean success = file.renameTo(new File(dir, file.getName()));
    if (!success) {
        // File was not successfully moved
    }

source

Docs

• Java Desktop Media
• JAI at java.net (”new” home) (old location: Java Advanced Imaging API Home Page)
• Java Doc ImageIO

Sample code links:

class EmpSortByName implements Comparator{

    public int compare(Employee o1, Employee o2) {
        return o1.getName().compareTo(o2.getName());
    }
}

....
List employees = ...;
Collections.sort(employees , new EmpSortByName());

java.lang.Comparable: int compareTo(Object o1)
This method compares this object with o1 object. Returned int value has the following meanings.

1. positive – this object is greater than o1
2. zero – this object equals to o1
3. negative – this object is less than o1

java.lang.Comparator: int compare(Object o1, Objecto2)
This method compares o1 and o2 objects. Returned int value has the following meanings.

1. positive – o1 is greater than o2
2. zero – o1 equals to o2
3. negative – o1 is less than o1

Source: Java Sorting: Comparator vs Comparable Tutorial

By default, apache commons BeanUtils does not support string value to their targeted Enum. You can write a converter for each enum, but this quickly become unmanageable.

Here is a quick fix to automatically convert the string value to the targeted enum.

BeanUtilsBean beanUtilsBean = new BeanUtilsBean(new ConvertUtilsBean(){
            @Override
            public Object convert(String value, Class clazz) {
                  if (clazz.isEnum()){
                       return Enum.valueOf(clazz, value);
                  }else{
                       return super.convert(value, clazz);
                  }
           }
        });

Now, you can call beanUtilsBean.populate(bean,map) even for enum values.