Monthly Archives: March 2010

China is not the world’s biggest manufacturer

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Wow, Talk about false perceptions. This was one of the things that I had taken for granted for so long that it was very surprising for me to ready today that China is not the world's largest manufacturer. I read this at Helen Wang's site http://helenhwang.net/2010/03/myth-of-manufacturing/ 

I quote

"The latest data shows, however, that the United States is still the largest manufacturer in the world. In 2008, U.S. manufacturing output was $1.8 trillion, compared to $1.4 trillion in China (UN data. China’s data do not separate manufacturing from mining and utilities. So the actual Chinese manufacturing number should be much smaller)."

Make sure to read the complete article, it has more interesting facts about how the manufacturing growth in China has not resulted in a rise in the middle class.

Posted via email from Sijin Joseph

soapUI – Web Service tool

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Sometimes a you come across a tool that just makes you think why you never used it before, I ran across one such tool last month, it’s called soapUI (http://www.soapui.org/ ).

This is an open source tool for testing web services, everything I wanted to do for testing some of the web services that we were developing including unit testing and load testing was provided out of the box by this awesome tool. Also I think the UI is quite well thought out and mature.

Here’s a list of the features at a high level,

soapUI is a free and open source desktop application for

It is mainly aimed at developers and testers providing or consuming WSDL or REST based Web Services (Java, .net, etc). Functional and Load Testing can be done both interactively in soapUI or within an automated build or integration process using the soapUI command line tools.

Mock Web Services can easily be created for any WSDL and hosted from within soapUI or using the command-line MockService runner. IDE-plugins are available for

soapUI requires Java 1.5 and is licensed under the LGPL license.

See their features page http://www.soapui.org/features.html for some screenshots of the cool stuff you can do using this.

Posted via email from Sijin Joseph

OutOfMemory/Heap space errors in Java

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Recently I had to work on a Java based rule modeling tool that was built on Java/Eclipse. The tool was pushing both eclipse and the JVM to the limits in terms of memory and I was getting a lot of OutOfMemory exceptions and out of heap space errors, usually these can be fixed by increasing the default limits.

The important settings in question are arguments passed to the JVM on startup, http://java.sun.com/javase/6/docs/technotes/tools/windows/java.html

-Xmsn

Specify the initial size, in bytes, of the memory allocation pool. This value must be a multiple of 1024 greater than 1MB. Append the letter k or K to indicate kilobytes, or m or M to indicate megabytes. The default value is chosen at runtime based on system configuration. For more information, see HotSpot Ergonomics 
Examples:

       -Xms6291456
       -Xms6144k
       -Xms6m
      

-Xmxn

Specify the maximum size, in bytes, of the memory allocation pool. This value must a multiple of 1024 greater than 2MB. Append the letter k or K to indicate kilobytes, or m or M to indicate megabytes. The default value is chosen at runtime based on system configuration. For more information, see HotSpot Ergonomics 
Examples:

       -Xmx83886080
       -Xmx81920k
       -Xmx80m

Other advanced VM settings are documented here, http://java.sun.com/javase/technologies/hotspot/vmoptions.jsp

1.       Eclipse IDE – If the IDE itself is running out of memory when compiling or editing code then you can increase the maximum memory pool using the Xmx option in eclipse.ini file present in the same folder as eclipse.exe.

2.       JVM from within eclipse – If the JVM is running out of memory when running an app from within eclipse, then you can adjust the memory settings from the JVM configuration tab within eclipse.

3.       JVM from Tomcat – On the Apache Tomcat configuration utility on the Java tab, you can specify the memory and heap settings.

Posted via email from Sijin Joseph