Wow. Meteor impacts!

Just got a call from my brother. Wanted to know if I knew anything about a meteor impact in western Finland. Not an unreasonable request given my history (and his), but I didn't. So I did a search.

Did you know... That of the top 50 meteor impacts with craters greater than 20 km in size, 7 are in Australia? Neat. Here's the full list:

http://en.wikipedia.org/wiki/List_of_impact_craters_on_Earth

Cool. Actually been to some of them. Here's the list of impact craters in Australia: http://en.wikipedia.org/wiki/List_of_impact_craters_in_Australia

Wolfe Creek is waaay cool and I visited it sometime in the 80's. http://en.wikipedia.org/wiki/Wolfe_Creek_crater

But back to my brother. He's going to visit this page, so here's a list of impact craters in Europe: http://en.wikipedia.org/wiki/List_of_impact_craters_in_Europe

He can do a sort and see the ones in Finland.
Cheers!

Stopping and/or Restarting an embedded Jetty instance via web call

I had a need to allow a web call to stop and restart an embedded Jetty instance.
So basically, I need to have something like this:

curl -v http://localhost:9103/some/path  # Calls a handler and does something RESTful 
curl -v http://localhost:9103/stop       # Stops the Jetty instance
curl -v http://localhost:9103/restart    # Restarts the Jetty instance

First up create a main class:

package com.company;

import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.NCSARequestLog;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.ContextHandlerCollection;
import org.eclipse.jetty.server.handler.HandlerCollection;
import org.eclipse.jetty.server.handler.RequestLogHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class EmbeddedJetty {

  private static Logger log = LoggerFactory.getLogger(EmbeddedJetty.class);

  public static void main(String[] args) throws Exception {
    while (true) {
      // Realistically all parameters should be read from some external file...
      log.info("Starting Jetty on port 9103");
      Server server = new Server(9103);

      HandlerCollection handlers = new HandlerCollection();
      ContextHandlerCollection contexts = new ContextHandlerCollection();

      // I added this to show how to add access logs to an embedded server.
      RequestLogHandler requestLogHandler = new RequestLogHandler();
      NCSARequestLog requestLog = new NCSARequestLog("/tmp/jetty-yyyy_mm_dd.request.log");
      requestLog.setAppend(true);
      requestLog.setExtended(true);
      requestLog.setLogTimeZone("UTC");
      requestLogHandler.setRequestLog(requestLog);

      // We want the server to gracefully allow current requests to stop
      server.setGracefulShutdown(1000);
      server.setStopAtShutdown(true);

      // Now add the handlers
      YourHandler yourHandler = new YourHandler(server);
      handlers.setHandlers(new Handler[]{contexts, yourHandler, requestLogHandler});
      server.setHandler(handlers);
      
      // Start the server
      server.start();
      server.join();
      
      // It's stopped.
      log.info("Jetty stopped");
      if (!yourHandler.restartPlease) {
        break;
      }
      log.warn("Restarting Jetty");
    }
  }
}

Now the handler:

package com.company;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.AbstractHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class YourHandler extends AbstractHandler {

  private static Logger log = LoggerFactory.getLogger(YourHandler.class);
  private Server server = null;
  public Boolean restartPlease = false;

  public YourHandler(Server server) {
    this.server = server;
  }

  private boolean stopServer(HttpServletResponse response) throws IOException {
    log.warn("Stopping Jetty");
    response.setStatus(202);
    response.setContentType("text/plain");
    ServletOutputStream os = response.getOutputStream();
    os.println("Shutting down.");
    os.close();
    response.flushBuffer();
    try {
      // Stop the server.
      new Thread() {

        @Override
        public void run() {
          try {
            log.info("Shutting down Jetty...");
            server.stop();
            log.info("Jetty has stopped.");
          } catch (Exception ex) {
            log.error("Error when stopping Jetty: " + ex.getMessage(), ex);
          }
        }
      }.start();
    } catch (Exception ex) {
      log.error("Unable to stop Jetty: " + ex);
      return false;
    }
    return true;
  }

  @Override
  public void handle(String string, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {

    String pathInfo = request.getPathInfo();
    // THIS SHOULD OBVIOUSLY BE SECURED!!!
    if ("/stop".equals(pathInfo)) {
      stopServer(response);
      return;
    }
    if ("/restart".equals(pathInfo)) {
      restartPlease = true;
      stopServer(response);
      return;
    }

  // Go off and do the rest of your RESTful calls...
  // And close off how you please
    response.sendRedirect("http://nowhere.com");
  }
}

And you can now run your main class from your IDE of choice.

Just for reference I added a log4j.properties:

# Site
log4j.logger.com.company=DEBUG, SITE_CONSOLE
log4j.additivity.com.company=false

# Set root logger level
log4j.rootLogger=DEBUG, CONSOLE
log4j.logger.org.eclipse=INFO, CONSOLE
log4j.additivity.org.eclipse=false

# ---------------------------------------------------------------------------------
# Appenders - Notice I have added a discriminator to the conversion pattern
# --------------------------------------------------------------------------------- 
# For console logging - not in production obviously as you'd use a rolling file appender
log4j.appender.SITE_CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.SITE_CONSOLE.layout=org.apache.log4j.EnhancedPatternLayout
log4j.appender.SITE_CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS}{UTC} SITE  %-5p [%t] %c{1.} %x - %m%n

# The baseline CONSOLE logger
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.EnhancedPatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS}{UTC} JETTY %-5p [%t] %c{1.} %x - %m%n

I created a plain Java SE app and added a 'lib' folder with these jars in it:

jetty-continuation-8.0.4.v20111024.jar
jetty-http-8.0.4.v20111024.jar
jetty-io-8.0.4.v20111024.jar
jetty-server-8.0.4.v20111024.jar
jetty-servlet-8.0.4.v20111024.jar
jetty-servlets-8.0.4.v20111024.jar
jetty-util-8.0.4.v20111024.jar
jetty-webapp-8.0.4.v20111024.jar
log4j-1.2.16.jar
servlet-api-3.0.jar
slf4j-api-1.6.2.jar
slf4j-log4j12-1.6.2.jar

From the Jetty8 release.
I then ensured that the MANIFEST included these jars.
Just for reference the META-INF/MANIFEST.MF looks like this:

cat META-INF/MANIFEST.MF 
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.2
Created-By: 1.6.0_29-b11-402-10M3527 (Apple Inc.)
Class-Path: lib/jetty-all-8.0.4.v20111024-javadoc.jar lib/jetty-contin
 uation-8.0.4.v20111024.jar lib/jetty-http-8.0.4.v20111024.jar lib/jet
 ty-io-8.0.4.v20111024.jar lib/jetty-server-8.0.4.v20111024.jar lib/je
 tty-servlet-8.0.4.v20111024.jar lib/jetty-servlets-8.0.4.v20111024.ja
 r lib/jetty-util-8.0.4.v20111024.jar lib/jetty-webapp-8.0.4.v20111024
 .jar lib/log4j-1.2.16.jar lib/servlet-api-3.0.jar lib/slf4j-api-1.6.2
 .jar lib/slf4j-log4j12-1.6.2.jar
X-COMMENT: Main-Class will be added automatically by build
Main-Class: com.company.EmbeddedJetty

I know I included the javadoc un-intentionally...
This scheme requires a lib folder alongside the jar with those files in it.
(Need to figure out how to bundle the Jetty8 jars so that the app is self-contained...)
So the jar can be started like this:

java -jar /some/folder/EmbeddedJetty/dist/EmbeddedJetty.jar

K

Book Review: The Grand Design by Stephen Hawking

Hmm. I have to say I was disappointed. If I had to sum up the book in one sentence it would be "I think M-Theory is our best shot at a GUT."

It's not that the book was not well written - it is.
Nor that it covers some details regarding the Strong Anthropic Principle that are glossed over elsewhere.
Nor that it fleshes out the mechanisms regarding Feynman diagrams and the Sum over Histories calculations.
Nor that is is sprinkled with Hawkings humorous quips and comments.
It's just that...
Well...

I expected not so much a revelation but a new way to view the relationship between the microscopic and macroscopic worlds.
And I didn't get it.
Worse, it seems that 99% of the book has been written about before.
And the appellation "New answers to the ultimate questions of life" seems almost completely incorrect.
Greenes "The Fabric of the Cosmos" came out in 2004 and apart from some minor differences says much of the same things.
And "Cycles of Time" (2010) by Penrose provides a detailed 'new' way of viewing the 2nd law and how it relates to the beginning of the universe (if 'beginning' is the right word) that isn't even mentioned by Hawking.
If this book had come out 10 or even 5 years ago it might have been considered "...mind-blowing stuff.." as the Sunday Times describes it.
But it didn't. It came out this year.
I accept that there must have been considerable difficulties relating to transcribing Hawkings thoughts and speech to paper, so it would have taken a long time to create.
But still...

Unrelated to the content I must add that for the copy of the paperback I purchased the choice of font and paper was unfortunate. Galliard and glossy paper make it physically difficult to read when not in natural light as the reflection gets irritating fast. I did love the comics and the artwork as they provided an insight to the beauty and difficulty of analysing the universe.

All in all, I'd have to say "don't bother" and would recommend Penrose and Greene as better choices.

Book Review: The New New Rules by Bill Maher.

I tried.
I really did.
I got to 'D'.
Then I just had to put it down.
I just couldn't read any more.
I like Bill Maher as a... well... a... Whatever.
I liked the documentaries.
Well...
Most of them.... Some... But this book...
I tried to laugh.
I really tried.
But like a stoney faced gargoyle looking down on nuns, I read page after page and I just couldn't.
Maybe it's American humor and I'm just not tuned to it.
In any case, unless you are a fan of him, and his show, and American, and...
Well... I will have to put this on the shelf and regret the loss.

There's a dead cockroach next to my ashtray

But I'm getting ahead of myself. I "used" to have a daughter.
Well step-daughter to be truthful.
She turned out ok. Except I have this nagging feeling that she blames all her sorrows on me.
Basically because the last time I saw her was some 15 years ago and the last thing she said to me was:

"I blame it all on you."

Er... Ooookaaaayyy... Sort of puts a wet blanket on things.
As per her somewhat forceful request, I've stayed away.
Anyway, when she was very young she used to sing a lot.
I say "sing" for some values of "sing" that include wailing.
(There was gnashing of teeth involved... Mine mostly. Eh. She was young.)
No matter. She used to paraphrase songs. Like when KLF did the... wait... Let me provide her rendition:

"Doctor POO-OOO, Doctor POO. Doctor POO-OOO, Doctor POO. Doctor POO-OOO, Doctor POO."

Er. Yes.
And she once assaulted me with the question:

"Why do porpoises need tents?"

Took a while. Ah. Yes. "To all intents and purposes."

Now. How did I get here?
Oh yeah.
The cockroach.
It's f**king hot at the moment.
I'm upstairs in what is laughably called my 'office'.
I came upstairs to type a post and realized it was 32C (as per the display on the portable air-con).
You gotta be joking!
It's 10:30pm!
I turned on the air-con and beat a hasty retreat downstairs to let the room cool down.
Went outside and sat down with a bourbon and soda.

You forget sometimes you're in Australia...

As Dylan Moran put it: "3/4 of a mile from the surface of the sun!"
Then what felt like a brown armored mouse hit me in the forehead.
Big bugger.
Glittering brown Queensland cockie flying at warp speed.
SMACK!
Right between the eyes. Couldn't protect myself*.
(*for the Monty Python fans)
2 inches of flying brown titanium at mach 2.
Nearly knocked me out.

B*stard.

After I flailed about trying to get it off me, it did a barrel roll and crash landed next to the ashtray and expired.
Upside down with residual nervous twitches.
Within seconds, ants started coming along and began the disassembly process.

Like I said, sometimes you forget you live in Australia.
Even the cockroaches have a hard time.
F*cking love it.

Review: The Holographic Universe by Michael Talbot

I have a strong suspicion I read this when it came out in 1992.
The first part is quite good; being a discussion of David Bohm and his work in physics.
The second and third parts have a certain 'aura' that became distinctly uncomfortable.
Then I had a holographic moment.
No, no, I was re-reading Chariots of the Gods!
Michael Talbot had morphed into Erich von Daniken!
It's funny after all these years that I can now go back and revisit the statements that I was so much in awe of and look up the psychic events Talbot describes.
Like Sai Baba and the like.
What a crock.
So much promise and so much rubbish.
The shoe horning of the holographic principle into almost every paragraph is distinctly embarrassing.
I regret that I harassed so many people in the 90's about this and it turns out to be a pile of...
Oh well.
We live and learn.

No Smart Comment goes Unpunished

Speaking of weird things I stumbled across an English website dedicated to “Christians against Mental Slavery.” Oooookaaay. Sounds self defeating to me. Apparently they want it to be a crime for anyone to monitor or influence human thought with the use of technology without consent. So, their website itself and of course CCTV in the Holy See is right out, I suppose. 

I love their catch-phrase though: “A website which we pray that god will use to change the course of human history.” Then almost as an afterthought they have “, for the better” tacked on the end. For whom, one might ask.

The site is broken by the way. The main page has a stuffed link so unless you know what’s wrong and enter the URL manually, you can’t actually enter the site or visit any of the pages. I suppose that’s what they mean when they use the phrase “informed consent” because you have to be informed (in HTTP) to enter the site and by doing that you’re giving consent. Convoluted I grant you, but logical.

Their “Scientific Evidence” page is rather curious and entertaining though. The use of microwaves to cause people to hallucinate and “hear voices.” is quite interesting, but it all seems pointless to me given that TV and video games are doing such a great job of influencing people. And don’t come back with that “video games can’t influence children” nonsense. Advertisers pay millions for a 15 second slot on TV and they wouldn’t do it if it didn’t work.

And speaking of monitoring, did you know that a large percentage of Americans believe they (and their pets apparently) are being stalked by groups and driven to suicide by government officials who “want to take out the trash.” Apparently they burgle your house (but don’t take or move anything), stage accidents in front of people and the like. Now I’m not talking about plain old community harassment here. Odd. But don’t despair, if, like some people in Canada who had their entire neighborhood bought out by an organized (and obviously rich) gang of harassment professionals just to target one person, you want to fight back, then you can! Yes! Just buy Orgone tools such as the Pulsed Crystal Succor Punch which is a quartz crystal with mobius knots around it that you hold over your heart chakra. Ah. Yes. That’s better. Now I am no longer bothered by those pesky thoughts and people and reptilian aliens and psychic gremlins who stand behind me in supermarkets and do things specifically to annoy me (and drive my pets to suicide) that no-one else can see.

It all sounds a tad loony, but it, like UFOs, has a dedicated and growing following. Odd.

Dead Flies and Calculations

Remember slide rules? Eee when I were a lass we didn’t have fancy calculators... Now I’m going to relate a story about what slide rules are for and the kind of anarchic calculations you can perform with them.

I remember when I was in high school in the bustling metropolis of Mt Barker deep in the outback of Western Australia. I say “bustling” in the sense that the most movement on the main street on an average day then was when a stray sheep wandering across the deserted streets.

I would use a slide rule to the amazement of farm boys who were more interested in calculating the amount of sheep dip to use on their fathers flock. And could only use the fingers they had between them to do that. Working out the right amount of sheep dip for flocks of greater then ten caused a furrowed brow and the removal of shoes to use toes.

I remember one calculation which got me an award of sorts. The teacher was impressed by the effort and accuracy of the calculations, but somewhat disapproved of the subject. I’ll explain. 

First you catch a fly. Now W.A. in the late 60’s was awash with them as it was before the introduction of dung beetles. So catching one was relatively easy. Next you pop it in a match box for safe keeping and obtain a length of very thin cotton and a thumb tack. You tie a small knot of the cotton around the shaft of the thumb tack and push it into your school desk. Then you make a very small and loose knot in the other end. The length of the cotton should be around a foot or so. B says he used hair instead of cotton to achieve the same goal.

Now you retrieve your fly and gently place the loose knot between the head and thorax of the fly and tighten the noose ever so slightly. Not too much or you’ll end up with the premature loss of your fly.

Then you let the fly go. And hey presto! Your own private fair ground attraction. The fly buzzes around going up and down in weird loops reminiscent of those rides called crabs or spiders or whatever. Anyway, you use a stopwatch and a notebook and take readings until eventually in an heroic attempt to get away the fly decapitates itself. The head falls in a gentle arc in one direction and the body buzzes around for a second or so before dropping like a stone to the desk. A friend of mine at the time managed to get three flies in this macabre whirly gig. Cute.

Anyway, this is where you pull out your trusty slide rule and start calculating the trajectory of head and body. I did a 5 page dissertation with graphs, tables,  charts and drawings showing the mass to arc trajectories of various heads and bodies of normal flies, blue bottles and sand flies. The teacher wasn’t happy but had to concede that they were as accurate and complete as any scholarly document he had seen. He stuck it to the wall in the science room amongst the sad remnants of other pupils attempts to engage with science.

The other thing I “calculated” was the strength and length of rubber to use with “Gidgies” when hunting frogs. Huh? Oh, yes... A Gidgie is a arm mounted sling shot with about three foot of heavy rubber band. With a  strong arm (which I didn’t have) and a ball bearing you could punch a hole in a car door from 100 foot away. I haven’t done that myself, but I did know guys at school who did. Vandals. 

Anyway, I figured this out once when a friend of mine, Garry, and myself climbed up a water tank overlooking a dam in a farmers paddock. We were armed with Garry’s gidgie and a handful of ball bearings. We sat patiently until a frog would rise to the surface and Garry would take pot shots at them. They don’t die by the way. If you hit the water very close to them, they sort of go limp, roll over and sink a bit. After a while they start kicking limply and in a minute they are off swimming again. Sigh. We didn’t have video games or TV or psychedelically painted minis or any other distractions available to “townies.” It was the 60’s in an outback town after all. 

And that, my friends, is what slide rules are intended to calculate. Try doing the same with a calculator and all the fun is drained from the exercise.

I was 13 at the time. And bored out of my skull. I might just mention that my attempts to bring some sort of life to the classroom in this sort of manner earned me a large number bruises from chalk and duster projectiles from the unsympathetic teachers.

The Root of all Evil

Now to many of you educated loonies this may not be news, but I’ve had to explain this to a couple of people recently, so I have taken it upon myself to educate. 

So. 

It’s not 

25.8069758

As you would expect based on the square root of an invalid famous number. Learn ancient greek and find out that it’s actually:

24.8193473

Ok. It’ll take a few of you to work that one out. Go read that last book of the standardized new testament again and think about it. You’d think it was the first number, but you’d be somewhat incorrect. Dr Ellen Aitken discovered the correct number.

An old article but see here: 666 not the devils number

One last thing. B just pointed out an item for sale on eBay. A Millennium Falcon chess set (from Star Wars for anybody not born this century). Now I looked at this items photo which starts bidding at £4.99. And I had a thought that it was in remarkable nick. And in very good focus for something that big.  I mean, it had Chewie and C3P0 playing chess on it right? 

That big? 

Hang on a moment! 

Then I got it. The damn thing is about half an inch across! So some dude is dismantling some Hasbro (or whatever) model of a Millennium Falcon and selling the pieces of that toy on eBay for £5, or thereabouts, a go! Man, oh man, I wish I’d thought of that!

Rawhead Rex, Maniac Nurses and a Steam Powered Cat Cannon.

Ok. It’s past 11pm but I’m feeling better. Well I say “better” for some values of better which don’t include being subjected to the movies “Rawhead Rex” and “Maniac Nurses.” The idea of a biker with a head like Arnie who had some rather bad dental work done with what must have been a ball peen hammer or a very drunk surgeon with piranhas attached to his hands terrorizing the Irish countryside and a bunch of nurses with Uzis shooting people and lazing around a chateau in lingerie is not my idea of convalescence. 

I’m not kidding. Somebody actually managed to get funding to produce these movies. What on earth where the venture capital people snorting when the writer pitched the story is what I want to know. Can you imagine the scene? Several VCs sitting around a desk and some writer comes in and says: 

“Ok. Imagine this. A farmer is sick of a neolithic stone sticking up in his field. So he pulls it down right? And it releases a demon right? And this demon, see, is dressed like Arnie in the T2 movie see, but has really bad teeth see, and he starts attacking the locals see, and a photographer sees the verger in the local church see, who has stuck his hands into a desk, see, and a red light comes out see, and... Oh. Yeah. Ta. Thanks for the funding for that movie. Excellent. We’ll start and finish shooting this week. Oh I got another pitch see... Oh. You wanna hear it? Well sure thing. Well, see, there’s these lesbian nuns in a convent and they wear lingerie see, and use Uzis on anyone who violates their code see...”

And people have the gall to say that the “Lost” series is convoluted... Sigh.

Still, my “rest and recuperation” has yielded some results. We worked out a great use for cats in general. Now I need to mention that I’m a great cat lover, but the idea of a steam powered belt fed cat cannon tickles more than just my fancy. 

B could hardly contain himself as he drew a diagram ala Steam-Punk Victoriana device that has dozens of cats being fed into a steam powered static electricity generator and since cats have a natural affinity for static electricity this would make wonderful anti-personnel devices. Just imagine being struck by a frantic cat (which at high speed is just a chain saw with a brain anyway) with it’s fur fluffed out at 90 mph delivering 50,000 volts of charge. 

Enough to stop a crazed neolithic biker with bad teeth and a penchant for eating Irish farmers or even crazed Uzi wielding lingerie wearing nuns I should imagine. B considered a Puppy Launcher, but it just doesn’t quite have the same impact, if I can use that word, as a cat with enough vooom to power a small town does it now?

I wipe the tears from my ears.