This is to inform that we now support the feature of making use of the hotupdate feature in axis2 web service feature.  Try this tutorial http://wso2.org/library/tutorials/live-edit-your-axis2-web-service-using-eclipse for more details. Basically it allows you to test your web service while you edit it. Really cool.

It is literally within seconds, given that you already have the java class which you intend to make it a web service.  Here’s the link http://wso2.org/library/tutorials/create-axis2-web-service-3-steps-using-eclipse. Will write a web service  which would be more close to a real world scenario next time. Any thoughts of improvement is welcome.

I recently wrote an I article to WSO2 OT regarding creating a client to consume or should I say access a web service. Didn’t explain a complex scenario though. Only showed the simple case of accessing a Web Service. This is the link to access the tutorial http://wso2.org/library/tutorials/creating-web-service-client-3-steps-using-eclipse. Thinking of writing a tutorial with a more complex scenario of handling security or binary uploads/downloads.

I think it was about more than 10 years ago when I last watched a stage drama. And that was මනමේ (maname), back when I was in school. Before that it was a stage drama called කැඩපත (kadapatha) – I barely remember that one. Even though I wasn’t dyeing to see another one, I always wanted to go watch a stage drama just for a change to all the big screen (wide-screen, lcd screen, television screen) movies. After missing several opportunity I finally got a chance to watch the famous stage artist Jayalath Manoratnes (ජයලත් මනෝරත්නයන්) thala mala pipila (තල මල පිපිලා) stage drama today.

When the drama started I was captured by the strange lighting that was made in the stage focussing the attention on a person wearing on a robot costume. Eventhough the constume wasn’t good enough to pass for a real robot, it made me feel that we are about to enter to a strange world. I sat up straighter on my chair. The year it said was 4000 AD. It explains that they no longer pocess anything called tradition (සම්ප්‍රදාය) or emotions (හැඟීම්) but there were a species called humans millenniums ago who did have it. The robot wanted to share one such historical scene with us. It was one of the wierdest way of stepping in to a story, but nonetheless the surrounding the lighting and the synthesized voice made it very interesting.

The story starts up from that point onwards, and I wont explain what the story is, because I would probably ruine the greateness of such an artistic creation just by trying to make you imagine what it was like. But I must say the attention to the details, the lighting, the music, the hilarity and the magnificent performance of the stage actors did not stir me even anything close to bordem. It kept us interested right until to the end.

Now I’m officially a sri lankan stage drama fan

This is not entirely accurate, but close enough analogue. Found on the internet.

The 8 Monkeys

(This is reportedly based on an actual experiment conducted in the U.K.)

Put eight monkeys in a room. In the middle of the room is a ladder, leading to a bunch of bananas hanging from a hook on the ceiling.
Each time a monkey tries to climb the ladder, all the monkeys are sprayed with ice water, which makes them miserable. Soon enough, whenever a monkey attempts to climb the ladder, all of the other monkeys, not wanting to be sprayed, set upon him and beat him up. Soon, none of the eight monkeys ever attempts to climb the ladder.
One of the original monkeys is then removed, and a new monkey is put in the room. Seeing the bananas and the ladder, he wonders why none of the other monkeys are doing the obvious.  But undaunted, he immediately begins to climb the ladder.
All the other monkeys fall upon him and beat him silly. He has no idea why.

However, he no longer attempts to climb the ladder.
A second original monkey is removed and replaced. The newcomer again attempts to climb the ladder, but all the other monkeys hammer the crap out of him.

This includes the previous new monkey, who, grateful that he’s not on the receiving end this time, participates in the beating because all the other monkeys are doing it.  However, he has no idea why he’s attacking the new monkey.
One by one, all the original monkeys are replaced. Eight new monkeys are now in the room. None of them have ever been sprayed by ice water. None of them attempt to climb the ladder. All of them will enthusiastically beat up any new monkey who tries, without having any idea why.

This was really stupid of ’sed’ command. I had a file which had 2 occurances of the same string in 2 different lines and i wanted only the first to be replace by some other string. Took me a while to figure out why the conventional sed command doesnt work. (Incase you are wondering its because sed is a line-based command. i.e. reads a line from input, apply the whole sed logic and the mentioned operations in it, print the output and repeat the whole process for the rest of the input lines).

so anyway what you have to do is pretty simple. either you have to format your input to remove the new line characters and feed that as the input and somehow reintroduce the newline character after sed was applied, or feed the whole input to sed in a non-line-based form. Anyway found this on the net. http://linux.dsplabs.com.au/rmnl-remove-new-line-characters-tr-awk-perl-sed-c-cpp-bash-python-xargs-ghc-ghci-haskell-sam-ssam-p65/.

So coming back to what I wanted to do,

$ cat myfile | sed ‘:a;N;$!ba;s/originalstring/replacestring/’

notice the bolded characters added in the sed command. They are the extra addition to the conventional sed command we use for seach and replace strings.

This is a song which I’ve heard so often, but never appreciated its meaning before now. It is all about letting go of the past. Being humans we always tend to live in the past. Some of us more than others.

Here’s the lyrics

අතීතය සිහිනයක් පමණයි
සැබෑ සුවඳක් නෑ.......
එදා සෙනෙහෙන් නොබැඳුනානම්
මෙදා වියෝවක් නෑ.....

තැනූ මන්දිර බිඳී වැටුනත්
නෙතේ කඳුලක් නෑ....
සිනහ වෙන්නට වරම් නොලදත්
සිතේ කිලුටක් නෑ.....

අතීතය සිහිනයක්........

සොබා දහමට නොවන අවනත
ලොවේ කිසිවක් නෑ.....
ලොවේ පැරදුම මිසක කිසිදා
ලැබූ දිනුමක් නෑ....

අතීතය සිහිනයක්........

Listen to the song අතීතය සිහිනයක් පමණයි – කරුණාරත්න දිවුල්ගනේ

This is pretty simply done using the sed command. All you have to know is regular expressions.

To remove leading white spaces

sed 's/^ *//g'

To remove trailing white spaces

sed 's/ *$//g'

So as an example,

$ echo "  aaaa   bbbb      " | sed 's/^ *//g' | sed 's/ *$//g'
aaaa   bbbb

Thats it.

3 golden rules. Never ever ever ever make decisions when,

• you are extremely sad (Because you wont see what you haven’t lost)
• you are extremely happy (Because you wont see what you have lost)
• you are extremely angry (Because you wont see what you may loose)

First of all how to create a patch if you dont know…
$ svn diff mychangedfile1 dir1/dir2/mychangeresource2 > mypatch.txt

To apply this patch it needs to be in the same svn location as the patch was taken. Then using the patch command u apply the patch
$ patch -p0 < patch.txt