Nightly Builds

How to get pid in Java

unnisworld — Wed, 28 Dec 2011 14:02:03 +0000

ManagementFactory.getRuntimeMXBean().getName()

not yet verified.

Coherence : how to disable iptimeout

unnisworld — Thu, 18 Nov 2010 08:05:29 +0000

How to avoid iptimeout issue when connecting from ur Desktop to a remote machine

In tangosol-coherence-override.xml – under element add

this disables IP monitor timeout

How to log iptables packet drops

unnisworld — Thu, 14 Oct 2010 08:45:15 +0000

Add following two lines to /etc/sysconfig/iptables

-A INPUT -m limit –limit 15/minute -j LOG –log-level 7 –log-prefix “Dropped by firewall: “

-A OUTPUT -m limit –limit 15/minute -j LOG –log-level 7 –log-prefix “Dropped by firewall: “

Restart iptables

In /etc/syslog.conf, add

kern.=debug /var/log/firewall

Restart syslogger – /sbin/service syslog restart

Unix Tip: Who occupied my port?

unnisworld — Thu, 03 Jun 2010 07:10:10 +0000

[root@lglor060 init.d]# netstat -aovpn | grep 8091

tcp 0 0 172.23.73.60:8091 0.0.0.0:* LISTEN 2149/java off (0.00/0/0)

tcp 0 0 172.23.73.60:8091 172.23.73.60:38490 ESTABLISHED 2149/java off (0.00/0/0)

[root@lglor060 init.d]# ps -ef | grep 2149

useful mvn commands

unnisworld — Thu, 22 Apr 2010 14:46:05 +0000

To download sources, use – mvn dependency:sources

mvn eclipse:eclipse -DdownloadSources=true

To use maven jetty plugin, add below plugin to your pom,

org.mortbay.jetty
maven-jetty-plugin

use command mvn org.mortbay.jetty:jetty-maven-plugin:run to start jetty.

To use the truncated command mvn jetty:run, add below lines to your settings file,

  
    org.mortbay.jetty
  

To create an Eclipse Web project using maven use - mvn eclipse:eclipse -Dwtpversion=1.5

Linux iptables

unnisworld — Wed, 21 Apr 2010 06:19:54 +0000

How to delete entries,

You can delete them based on what they’re doing :
iptables -D INPUT -s 127.0.0.1 -p tcp --dport 111 -j ACCEPT

Or you can delete them based on their number and chain name :
iptables -D PORTSEN 4

Java Tip: Who called me?

unnisworld — Fri, 11 Sep 2009 11:32:03 +0000

This can be a handy tip if you are debugging some java application which cannot be run in single step debug for some reason. Suppose you have a method which is called from many places and you need to know the current caller.
Just capture the current stack trace by making a Throwable object. Now get the 2nd stack trace element from t.getStackTrace() which will have the caller details.

A small example..

public class test {


	public static void main(String[] args) {

		caller1();

		caller2();

	}
	private static void caller1() {

		method();

	}
	private static void caller2() {

		method();

	}
	private static void method() {

		Throwable t = new Throwable();

		StackTraceElement ste = t.getStackTrace()[1];
		System.out.println(ste.getMethodName() + " called me.");

		System.out.println("File Name :"+ste.getFileName());

		System.out.println("Line Number :"+ste.getLineNumber());

	}

}

JavaScript Tip: How to set target for form sumit.

unnisworld — Mon, 08 Jun 2009 13:28:47 +0000

Requirement :- I have an HTML form in my current page. When I submit this form, the result should open in new window.

function openNewWin(formName) {
features=”toolbar=no,location=0,directories=no,status=yes,menubar=yes,scrollbars=yes,copyhistory =1,resizable=1,width=980,height=390,left=0,top=100″;
popupWindow = window.open(”, ‘NewWindow’, features);
thisForm = “document.” + formName;
eval(thisForm).target = ‘NewWindow’;
window.setTimeout( thisform + “.submit()”, 0 );
}

Clearcase : recursive checkin

unnisworld — Thu, 19 Mar 2009 08:59:50 +0000

cleartool lsco -cview -avobs -short | xargs cleartool ci

Program to count number of words in a file

unnisworld — Fri, 02 Jan 2009 14:30:03 +0000


#!/usr/bin/perl

sub count_words_in_line {
  # use our to declare global variable.
  our %word_count;

# below two lines can be combined into one like this - @words = split " ", shift
  $line = shift @_;
  @words = split " ", $line;

  foreach my $word (@words) {
    $word_count{$word}++;
  }

}

sub count_words_in_file {
  my $file = shift;
  print $file . "\n";
  open (FILE, $file) || die "$0: @_: $!";

  while (my $line = ) {
    count_words_in_line $line;
  }

}

#print @ARGV[0] . "\n";

$file_name = shift;
count_words_in_file $file_name;

print %word_count;