java spring hibernate eclipse javascript linux sql WID WPS WESB SCA SDO

Invoking an external web service using WID from behind the firewall

2009-07-22T14:25:00.016+07:00

So, you imported a WSDL (from an external provider) onto your SCA module in WID, you tried invoking it, but you keep getting


javax.xml.ws.WebServiceException: java.net.ConnectException: Connection timed out: no further information
at org.apache.axis2.jaxws.ExceptionFactory.createWebServiceException(ExceptionFactory.java:180)
...

That's because the machine where the WSDL is being invoked from is behind the firewall.

So, to invoke an external web service from behind a firewall, you need to set your jvm system properties :
1) Open the administrative console. Click Servers ==> Application Servers ==> server ==> Java and Process Management ==> Process Definition ==> Java Virtual Machine ==> Custom Properties

2) Add these into the Generic JVM Arguments


name=http.proxySet value=true
name=http.proxyHost value=proxy.mycompany.com
name=http.proxyPort value=8080
name=http.proxyUser value=your_proxy_username_if_required
name=http.proxyPassword value=your_proxy_password_if_required
name=http.nonProxyHost value=localhost|*.hosts.to.be.excluded.from.going.thru.proxy

Alternatively, you could add this to the generic JVM arguments of your JVM


-Dhttp.proxySet=true -Dhttp.proxyHost=proxy.mycompany.com -Dhttp.proxyPort=8080 -Dhttp.proxyUser=yourproxyusername -Dhttp.proxyPassword=yourproxypassword -Dhttp.nonProxyHost=hostNamesOfMachinesToWhichRequestsWillNotBeSentThroughTheProxyServer

See Configuring additional HTTP transport properties using the JVM custom property panel in the administrative console

Don't forget to set your http.nonProxyHosts. If it is not set, all your http connections will go thru the proxy server, which you don't want to do. You only want your external web service requests to go thru the proxy server, but you want your internal web service requests to not go thru the proxy server.

See

http://java.sun.com/javase/6/docs/technotes/guides/net/proxies.html

java: An algorithm for converting an array to comma delimited/separated string/value (e.g. csv)

2008-03-19T20:49:00.004+07:00


Long[] array = {new Long("1"), new Long("2"), new Long("3")};

for (int i = 0; i < array.length(); i++)
{
   if (i > 0) 
   {
       sb.append(", ");
   }

   sb.append(array[i]);
}

System.out.println(sb.toString());

//output: 1, 2, 3

java: How to convert String array to Long array

2008-03-18T20:26:00.004+07:00

String[] numbersString = {"1", "2", "3"};

List list = new ArrayList();

for (int i = 0; i <>

    Long tmp = Long.valueOf(s[i]);

    list.add(tmp);

//convert Long ArrayList to Long[] array

Long[] numbersLong = (Long[])list.toArray(new Long[0]);

java: How to put checkboxes in DisplayTag using Struts multibox

2008-03-15T22:05:00.005+07:00


<display:table name="sessionScope.myFormBean.mySearchResultArrayList" id="myRecord">
  <display:column title="Select">
     <html:multibox property="selectedItems"
             value='<%= (String)((com.abc.def.MyClass)myRecord).getAbc().toString() %>' />
  </display:column>
</display:table>

Note:

myFormBean is the name of your Form Bean (i.e. MyFormBean.java)

mySearchResultArrayList is a collection getter in your MyFormBeanName.java. It will hold a collection of your MyClass.java

MyClass will represent each row in your DisplayTag (i.e. MyClass.java). Your mySearchResultArrayList will contain many MyClass.java

myRecord represents the reference to the MyClass object.

selectedItems is a String array property in your MyFormBeanName.java with a getter/setter. It will hold the values of the selected checkboxes. It will also be the name of the checkbox group in html.

MyClass.java

public class MyClass
{
  private String abc;

  public void setAbc(String abc)
  {
     this.abc = abc;
  }

  private String getAbc( )
  { 
     return abc;
  }
}

MyFormBean.java

public class MyFormBean
{
  private String[ ] selectedItems; 
  private List mySearchResultArrayList;

   public void setMySearchResultArrayList(List list)
  {
      mySearchResultArrayList = list;
      String[] selectedItems = (String[]) mySearchResultArrayList.toArray(new String[0]);
   }

  public List getMySearchResultArrayList( )
  {
     return mySearchResultArrayList;
   }

   public String[ } getSelectedItems( )
  {
     return selectedItems;
   }

  public void setSelectedItems(String[ ] selectedItems)
  {
     this.selectedItems = selectedItems; 
  }
}

javascript: How to select/deselect checkboxes

2008-03-15T20:12:00.003+07:00

This function will select/deselect, tick/untick, check/uncheck all checkboxes belonging to a group. It can be used by a button to toggle a checkbox collection (e.g. Struts multibox in DisplayTag).


function toggle (checkboxes, isSelectAll)
{
 if (checkboxes != null)
 {
     for (i = 0; i < checkboxes.length; i++)
     {
         checkboxes[i].checked = isSelectAll;       
     }
 }
}

Usage: You can call this function on two buttons:
- select button: onclick="CheckboxUtil.toggle(document.formName.checkboxName, true)"
- deselect button: onclick="CheckboxUtil.toggle(document.formName.checkboxName, false)"

where:
- formName = name of the form.
- checkboxName = name of the checkbox group

Make sure all your checkboxes have the same checkboxName.

java: How to get DisplayTag sorting URL to work in Struts Tiles

2008-03-15T18:36:00.004+07:00

Simply put requestURI with blank value onto the DisplayTag attribute.


<display:table name="sessionScope.myForm.searchResult"
              id="record"
               requestURI="">

</display:table>

java: How to convert a String ArrayList into String array

2008-03-15T14:19:00.002+07:00

String[] stringArray = (String[]) stringArrayList.toArray(new String[0]);

java: The difference between the HTML comment  and the JSP comment <%-- --%>

2008-03-15T13:21:00.005+07:00

The HTML comment will show up in browser view source.

The JSP comment <%-- --%> will not show up in browser view source.

java: Why Log4J's Logger should be declared static final

2008-03-10T20:12:00.002+07:00

Declaring Logger to be static final is recommended, particularly for long lived objects such as the Struts Action class
http://www.owasp.org/index.php/Poor_Logging_Practice:_Logger_Not_Declared_Static_Final

e.g. private static final Logger LOGGER = Logger.getLogger(Donkey.class)

The Struts framework creates only one instance of an Action class for all client requests. e.g. FooAction and BarAction will only be created once.
Static means the Logger is not specific to a particular client request, but is shared by all requests.
Final means the Logger will only be instantiated once.

Logger is tread safe because it doesn't hold a state.

Java: Eclipe's notion of classpath 101

2008-02-24T07:32:00.010+07:00

In Eclipse, if you don't specify the build path, your classes by default will be placed in the base classpath of your project module. E.g.
C:\workspaces\myproject\myModuleEJB\classes\xxx

Therefore, your base classpath is C:\workspaces\myproject\myModuleEJB\classes\xxx

Consider two spring config source folders :
C:\workspaces\myproject\myModuleEJB\testsrc\spring\testApplicationContext.xml
C:\workspaces\myproject\myModuleEJB\configsrc\spring\businessRules.xml

testApplicationContext.xml is referring to businessRules.xml e.g.

testApplicationContext.xml
===================


<bean id="businessRules" init="false" class="org.springframework.context.support.ClassPathXmlApplicationContext">
  <constructor-arg>
     <list><value>spring/businessRules.xml</value></list>
  </constructor-arg>
</bean>

both testApplicationContext.xml and businessRules.xml are compiled by Eclipse into
C:\workspaces\myproject\myModuleEJB\classes\spring\testApplicationContext.xml
C:\workspaces\myproject\myModuleEJB\classes\spring\businessRules.xml

therefore, if testApplicationContext.xml wants to refer to businessRules.xml, the testApplicationContext.xml has to refer to the base classpath location of businessRules.xml
ie. /spring/businessRules.xml

java: Spring's Hibernate Template now obsolete as of Hibernate 3.0.1

2008-02-24T07:26:00.003+07:00

See
http://blog.springsource.com/main/2007/06/26/so-should-you-still-use-springs-hibernatetemplate-andor-jpatemplate/

Also, see
- Spring in Action (2nd ed) page 193

- Beginning Spring 2 page 70

java: How to deploy EJB in WebSphere using Ant

2008-02-13T16:30:00.001+07:00


    <property name="package.lib.dir"  value="${lib.dir}/package" />

    <target name="create-was-ejb">
        <property name="ejbdeploy.classpath.prop" refid="ejbdeploy.classpath" />

        <path id="ejbdeploy.classpath">
            <fileset dir="${package.lib.dir}" includes="*.jar" />
            <pathelement location="${was.home}/java/jre/lib/ibmorb.jar" />
        </path>

        <taskdef
                name="wsejbdeploy"
                classname="com.ibm.websphere.ant.tasks.WsEjbDeploy"
                classpath="${was.home}/lib/wsanttasks.jar" />

        <wsejbdeploy
                inputJar="${build.dir}/${ant.project.name}-${version}-tmp.jar"
                wasHome="${was.home}"
                workingDirectory="${build.dir}/ejb-tmp"
                classpath="${ejbdeploy.classpath.prop}"
                outputJar="${build.dir}/${ant.project.name}-${version}.jar"
                compatible35="false"
                keepGenerated="true"
                quiet="true"
                failonerror="true" />
    </target>

linux: Linux directory structure

2008-02-04T21:26:00.001+07:00

Below is a typical linux directory structure of interest to me :/etc - contains the configuration files for the system. /etc/rc.d contains the scripts that get the system started.

/bin - has the essential programs that the system requires to operate.

/usr/bin - contains applications for the system's users.
/sbin, /usr/sbin - contain programs for system administration, mostly for use by the superuser.
/usr/local - used for the installation of software and other files for use on the local machine. What this really means is that software that is not part of the official distribution. When you find interesting programs to install on your system, they should be installed in one of the /usr/local directories. Most often, the directory of choice is /usr/local/bin.

/tmp - is a directory in which programs can write their temporary files.

Source: http://www.linuxcommand.org/lts0040.php

java: A simple ANT template

2008-02-03T19:45:00.000+07:00


<?xml version="1.0" ?>
<project name="secondbuildJAR" default="compile">

 <property file="${user.home}/build.properties"/>
 
 <property name="source.dir"           location="src"/>
 <property name="build.dir"            location="build"/>
 <property name="build.classes.dir"    location="${build.dir}/classes"/>
 <property name="distribution.dir"     location="dist"/>
 <property name="distribution.doc.dir" location="${distribution.dir}/doc" />

 
 <property name="project.name"    value="${ant.project.name}" />
 <property name="project.version" value="0.1.alpha" />
 <property name="target.name"     value="${project.name}-${project.version}.jar" />
 <property name="target.jar"      location="${distribution.dir}/${target.name}" /> 
 
    
 <patternset id="meta.files">
        <include name="**/*.xml"/>
        <include name="**/*.properties"/>
    </patternset> 
 

 <path id="compile.classpath">
   <fileset dir="lib">
     <include name="*.jar"/>
     <include name="*.zip"/>    
   </fileset>
 </path>
 
 
 
 <path id="run.classpath">
   <path refid="compile.classpath"/>
   <pathelement location="${target.jar}"/>
 </path>

 
 
 <target name="clean">
  <delete dir="${build.dir}" />      
  <delete dir="${distribution.dir}" /> <!--this will delete both dist and dist/doc -->

  <mkdir dir="${build.classes.dir}" />
  <mkdir dir="${distribution.doc.dir}" />
 </target>

 
 
    <!-- Copy metadata to build classpath -->
    <target name="copymetafiles" depends="clean">
        <copy todir="${build.classes.dir}">
            <fileset dir="${source.dir}">
                <patternset refid="meta.files"/>
            </fileset>
        </copy>
    </target> 
 
 

 <target name="compile" depends="copymetafiles" description="Compiles the project">
  <javac srcdir="${source.dir}" 
      destdir="${build.classes.dir}" 
      debug="${build.debug}">
      <classpath refid="compile.classpath"/>
  </javac>
 </target>


 <target name="archive" depends="compile" description="JARs up the project">
  <jar destfile="${target.jar}"
    duplicate="preserve"
    manifest="${source.dir}/META-INF/MANIFEST.MF">
   <fileset dir="${build.classes.dir}"/>
  </jar>
 </target>
     
     

 <target name="execute" depends="archive" description="Executes the main class">
  <echo>running this program now!!!</echo>
  <java classname="org.antbook.welcome.Main" classpathref="run.classpath" failonerror="true">
   <arg value="a" />
   <arg value="b" />
   <arg file="." />
  </java>
  <echo>end running the program!!!</echo>  
 </target>


 <target name="echo">
  <echo message="ant.file = ${ant.file}" /><!--where this ant file is located-->
  <echo message="ant.home = ${ant.home}" />
  <echo>ant.version = ${ant.version}</echo>
  <echo>java.home = ${java.home}</echo>
  <echo message="ant.java.version = ${ant.java.version}" />
  <echo>ant.project.name = ${ant.project.name}</echo>
  <echo>user.name = ${user.name}</echo>
  <echo>user.home = ${user.home}</echo>
  <echo>basedir = ${basedir}</echo>
  <echo>build.debug = ${build.debug}</echo>
 </target>
 


</project>

linux: bootloader file location

2008-01-06T14:30:00.000+07:00

I have an ASUS F3SV laptop. It's dual boot Vista / Ubuntu. In the boot menu, if I choose the first Vista menu option, the boot loader will be corrupted, making me unable to start up Ubuntu and Vista.

I have no problems getting if into Vista if I choose the 2nd Vista menu option. So, to prevent me from choosing the first Vista option in the first place, I simply commented that option in

/boot/grub/menu.lst

java/linux: Setup ClassPath in Unix/Linux (ubuntu) on your .bashrc

2008-01-06T13:46:00.000+07:00

If you want to be able to call eclipse / ant / java from any prompt in your linux system, then
edit your .bashrc and add this lines :

# User specific environment and startup programs
export ECLIPSE_HOME=/usr/local/eclipse
export JAVA_HOME=/usr/lib/jvm/java-6-sun
export ANT_HOME=/usr/share/ant

PATH=$PATH:$ECLIPSE_HOME:$JAVA_HOME/bin:$ANT_HOME/bin

export PATH

note: $PATH is how your current path is configured. If you type in echo $PATH in the command line, you should see something like this
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:

The colon ":" is simply just the delimiter.

Once you've edited your .bashrc, reboot your pc (or type ctrl + alt + backspace) for your new settings to take effect. After you've rebooted, type the following from the command line and see the results :

echo $JAVA_HOME

See :
http://java.sun.com/docs/books/tutorial/essential/environment/paths.html

linux: Add RealPlayer in your Ubuntu

2008-01-06T13:40:00.000+07:00

wget -c http://www.debian-multimedia.org/pool/main/r/realplay/realplayer_10.0.9-0.1_i386.deb
sudo dpkg -i realplayer_10.0.9-0.1_i386.deb

See :
http://www.howtoforge.com/the_perfect_desktop_ubuntu_gutsy_gibbon_p6

eclipse: Installing JBoss Tools (formerly known asn JBoss IDE or Hibernate Tools) and SpringIDE via Update Manager

2008-01-06T13:36:00.001+07:00

Hibernate tools can be obtained from JBoss tools. To add JBoss tools in eclipse, add this as a "Remote Site" in your Eclipse Update Manager
~~http://download.jboss.org/jbosside/updates/stable~~
http://download.jboss.org/jbosstools/updates/stable

For more info, see :
~~http://docs.jboss.com/jbosside/install/build/en/html/installation.html~~
http://labs.jboss.com/tools/download/index.html

SpringIDE - just add this to your download manager
http://springide.org/updatesite

sql: querying date column

2007-12-17T11:05:00.000+07:00

select * from TABLE_NAME
where
COLUMN_NAME > TO_DATE('2007-12-07 23:59:05','yyyy-mm-dd HH24:mi:SS')

java: Short regular expression tutorial

2007-10-25T09:06:00.002+07:00

^ = logical not

\w = shortcut for alphanumeric. i.e. a-z, A-Z, 0-9, _

- = dash

. = full stop

space bar pressed here = space bar

[\\w-. ] = regular expression for valid characters.

[^\\w-. ] = regular expression for not valid characters (i.e.invalid characters).

//find a character that is not valid (ie. invalid characters are a-z, A-Z, 0-9, _, dash, full stop, and space bar

String regex = "[^\\w-. ]";

---------------------------------------------------------

Below are the common symbols you will often find:

^ The beginning of the line.

$ The end of the line.

. Any single character.

* Zero or more repetitions of the previous expression.

+ One or more repetitions of the previous expression.

[] Any of the characters inside the brackets will match—e.g., [abc] matches any of a, b, c. Ranges are allowed too—e.g., [a-z].

linux: creating symbolic link for java

2006-10-02T21:03:00.000+07:00

Symbolic link (aka symlink or shortcut in windoze)

ln -s /usr/java/jdk1.5.0_09/bin/java /usr/local/bin/java
ln -s /usr/java/jdk1.5.0_09/bin/javac /usr/local/bin/javac
ln -s /usr/java/jdk1.5.0_09/bin/javadoc /usr/local/bin/javadoc

linux: How to find where a program is located

2006-10-02T20:51:00.000+07:00

To find where firefox is installed, type:
which firefox

To find where java is installed, type:
which java

java/linux: Installing JDK/JavaSE

2006-10-02T20:39:00.000+07:00

From command prompt, su as root.

create dir /usr/java
place jdk-1_5_0_09-linux-i586.bin in /usr/java

chmod 777 jdk-1_5_0_09-linux-i586.bi

From /usr/java type
./jdk-1_5_0_09-linux-i586.bin

JDK is now installed in /usr/java/jdk1.5.0_09

linux: How to uninstall a (non-rpm) program

2006-10-02T20:36:00.000+07:00

User brute force uninstall :
rm -rf /thedirwhereyourprogramresides

java: Generating unique sequence of numbers

2006-01-22T18:23:00.000+07:00

Calendar calendar = Calendar.getInstance(TimeZone.getDefault());

//generate a unique sequential number. We derive this from the
//number of milliseconds since 00:00:00 GMT Jan. 1, 1970 using //calendar object.
String runNumber = new Long(calendar.getTime().getTime()).toString();

System.out.println(runNumber);

java: Sorting Dates in a List (Collection)

2006-01-22T18:01:00.000+07:00


final String DATE_FORMAT = "dd/MM/yy";
SimpleDateFormat dateFormat = new SimpleDateFormat(DATE_FORMAT);
dateFormat.setTimeZone(TimeZone.getDefault());

//we store date as time in milliseconds.
//getTime() returns the number of milliseconds since
//midnight of January 1, 1970. This method is also very
//useful for generating a unique sequence of numbers.
Long date0 = new Long(dateFormat.parse("29/01/1995").getTime());
Long date1 = new Long(dateFormat.parse("13/12/2007").getTime());
Long date2 = new Long(dateFormat.parse("01/04/2000").getTime());

List dateList = new ArrayList();
dateList.add(date0);
dateList.add(date1);
dateList.add(date2);

Collections.sort(dateList);

//Get wrapper Long from list. convert Long to String. 
//Convert String to primitive long. Convert primitive long to Date.
Date dateLatest = new Date(Long.parseLong(((Long) dateList.get(dateList.size()-1)).toString()));
String dateLatestString = dateFormat.format(dateLatest);

System.out.println(dateLatestString);

javascript: Sorting Date in an Array (Collection)

2006-01-22T16:17:00.005+07:00


function getDateLatest()
{
  var date0 = new Date('12/31/2005');
  var date1 = new Date('11/29/2007');
  var date2 = new Date('01/13/1999');
  
  var dateArray = new Array();

  //we store date as time in milliseconds.
  //getTime() returns the number of milliseconds since
  //midnight of January 1, 1970. This method is also very
  //useful for generating a unique sequence of numbers.
  dateArray[0] = date0.getTime();
  dateArray[1] = date1.getTime();
  dateArray[2] = date2.getTime();
  dateArray.sort(sortNumber);

  var dateLatest = new Date(dateArray[dateArray.length - 1]);
  alert(dateLatest);}        

  //By default, Array sorts alphabetically.  To get it to sort
  //numerically, we write a function that compares numbers.
  function sortNumber(a, b)
  {
     return a - b
  }