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For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
Java web application for teaching - now with sessions and clustering / load balancing demonstrations

I regret naming "latmjdemo" with that name when I prut together a web application for the Java version of our web deployemnt course. The nameing isn't random:
• L - Linux, the operating system
• A - Apache - the Apache httpd web server that's commonly used to front web sites
• T - Tomcat - the Apache Tomcat (formerly Jakarta Tomcat) web server that provides the Java Servlet container
• M - MySQL - the database commonly used for data store and access
• J - Java - the programming language that's usually used to write substantial web apps.
Not only are these letters in this order a real "mouthful", but hosting may be on a Unix or Windows box, NginX may be used a the web server, Maria DB or SQLite may be the database and the Java source may have been replaced by Scala - yet the principles remain very much the same and our Deploying Apache / Tomcat course remains rather relevant until several elements are replaced.

So today I have copied (with no source code nor HTML changes needed!) latmjdemo.war to WellHouseApp.war, made a couple of minor revisions, and added further demonstrations into the application. These have been available as source code on our web site anyway - but they're now in the main distribution for the "tomcat course".
Barman - a session tracking demo
Landlord - sessions and application wide retained information
PubWatch - sessions across multiple servers for clustering and load balance training

Both old and new web applcations are available for delegates (and others) to download from our servers -
• latmjdemo [here]
• WellHouseApp [here]

(written 2015-02-20, updated 2015-02-19)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A690 - Web Application Deployment - Clustering and load balancing
  [934] Clustering, load balancing, mod_rewrite and mod_proxy - (2006-11-21)
  [1121] Sharing the load with Apache httpd and perhaps Tomcat - (2007-03-29)
  [1771] More HowTo diagrams - MySQL, Tomcat and Java - (2008-08-24)
  [1993] Load Balancing - Hardware or Software? - (2009-01-15)
  [1995] Automated server heartbeat and health check - (2009-01-16)
  [2059] Sharing the load between servers - httpd and Tomcat - (2009-02-28)
  [2482] Load balancing with sticky sessions (httpd / Tomcat) - (2009-10-29)
  [2483] Clustering on Tomcat - (2009-10-30)
  [3293] Distributing the server load - yet ensuring that each user return to the same system (Apache httpd and Tomcat) - (2011-05-18)
  [3339] Simplest ever proxy configuration? - (2011-06-28)
  [3892] Distributed, Balanced and Clustered Load Sharing - the difference - (2012-10-13)

J906 - Java - Servlets in More Detail
  [479] New servlet from old - (2005-10-28)
  [1495] Single login and single threaded models - Java and PHP - (2008-01-04)
  [1550] Java (JSP and Servlet examples) live on our server - (2008-02-23)
  [1909] javax.servlet cannot be resolved - how to solve - (2008-11-26)
  [2183] Servlet life cycle, and Java Servlet variable scope - (2009-05-16)
  [2652] Reading and writing cookies in Java Servlets and JSPs - (2010-02-26)
  [2717] The Multiple Inheritance Conundrum, interfaces and mixins - (2010-04-11)
  [3044] Changing a Servlet - more that just editing and compiling - (2010-11-12)
  [4431] A Java servlet that is also a stand alone program. And a server that is also a web client. - (2015-02-19)

J901 - Java - Servlets
  [3997] Servlet v JSP (Java Server Page). What is the difference? - (2013-02-06)


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Different views of a Welsh Valley - but headed home
Java web application for teaching - now with sessions and clustering / load balancing demonstrations
The spirit of Java - delegating to classes
Wind Turbines - beauty or menace?
Using the lead - passing arrays and other collections in Java
Java example - for loop and conditionals from course exercise
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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