Performance Visualization

Just a quick note to tell people that I/we have been running a blog/group site on performance visualization which you can see by clicking here.

If you are not already a member you should see a link on the right side that says "Apply for group membership". Just click on this and you could become a happy member.

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Handling multipart form data in Spring 3.1

Introduction Multipart mime encoded is a format used to transmit binary and arbitrary data in 1 single HTTP request transaction. In this post, I will describe how to create and process multipart form data using Spring 3.1, the leading industry standard java application framework for creating Java web application. I will start the discussion from the user perspective by talking about two main use cases and will expand it by describing how these two use cases translate into 7 possible application system use cases. Use Cases Here are some use cases of this feature: A browser submits or uploads a file to a web server using an HTML page. This is by far the most common use case of the multipart form data feature. A multipart is required because the form data and the file are both included in the request body. A java program (a java application or servlet instance) sends multipart form data to a web server (most likely a web service). This...

Tutorial on how to write and run a javaFX 11 Spring Boot program using Eclipse

Since the decoupling of javaFX from the JDK (see http://openjfx.io ) it has become somewhat of a challenge to use javaFX with the new module capability since java 9. This tutorial is a brief roadmap between a java 8 javafx to the java 11 version. All code for this sample resides in https://github.com/marioja/javafx and can be imported into eclipse and should run as is. You can also do this manually following these instructions. First you need to use an eclipse that supports the java 11 execution environment (Eclipse 2018-12 at the time of this writing). Then you need to make sure you have a java 11 jdk installed(11.0.2 at the time of this writing). I downloaded openjdk11 and unzipped into a folder on my home directory (user profile on windows). Lets call this directory jdk-11.0.2. You should add the eclipse -vm argument in the eclipse.ini file to select jdk-11.0.2. Start eclipse and create a brand new workspace (one that d...

Running an I/O benchmark using IOMETER

The following document describes the methodology used at MFJ Associates for running a disk I/O benchmark. This document assumes that the IOMETER software has been downloaded from www.iometer.org . IOMETER runs on Microsoft Windows as well as various flavors of Unix and Linux(referred to as *nix in this blog). It is made up of two components: iometer.exe a GUI program that only runs on Windows (which means you have to have at least 1 Windows desktop or server to run the GUI part) dynamo.exe or dynamo (on *nix) called the manager. In order to run a benchmark the Windows computer running iometer.exe must have TCP connectivity with the computer(s) where the benchmark will be performed. Both must be able to connect to one another. How to run a benchmark Here is a high level view of running a benchmark. A detailed explanation will follow. You need to start the iometer.exe program on the Windows computer. This will start the dynamo.exe program on that same compu...

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