• Eradani Bridges The Gap Between Legacy And Open Source

  July 8, 2019 Timothy Prickett Morgan

  In this publication, legacy is not a dirty word or even remotely pejorative. Rather, “legacy” is just a shorthand way of delineating between applications that encapsulate decades of the evolution of a business and the transactions it processes, and all of the other new stuff that this business is also doing and perhaps coding with newer tools and programming languages.

  A new company, called Eradani, has been founded by some experts in both the IBM i world and the open source world with the express purpose of building a technical bridge so these two different cultures can see a …

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• ARCAD Brings Traditional 5250 Development Into DevOps Fold

  June 24, 2019 Alex Woodie

  IBM i developers who embrace modern DevOps techniques typically also use modern development tools, like RDi. Much of the IBM i world uses IBM’s latest development environment, but many have resisted. Now, thanks to new software from ARCAD Software, IBM i developers who work with older tools like PDM can also partake of the benefits of DevOps.

  Getting older IBM i developers on board with the latest tools and techniques is a big priority for ARCAD Software, according to Alexandre Codinach, vice president of Americas for ARCAD Software, which included the new 5250 development capabilities with the launch of …

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• Bucking the System: Higher Ed, Hold the College

  June 12, 2019 Alex Woodie

  Jim Buck spent 15 years teaching IBM i and RPG at Gateway Technical College in Kenosha, Wisconsin. Buck achieved great things there, finding hundreds of students good jobs around the country. But ultimately the college experience grew old for Buck, so he ventured out on his own. That’s when he founded his own online IBM i educational company, imPower Technologies.

  That was two years ago, in the spring of 2017. After spending almost a year getting imPower Technologies up and running, Buck is teaching students IBM i and RPG once again. Currently he offers two courses: an introduction to IBM …

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• Guru: Preamble Comments

  April 15, 2019 Chris Ringer

  Do you remember what you ate for lunch two days ago? If you’re like me, you had to think about it for a minute before answering. Now imagine trying to recall the detailed requirements of a few programs you wrote a year ago so you can modify them for a new project. Or better yet, what if someone else like a retired employee or a traveling contractor coded these programs? At this point you may become very dependent on any comments they left in the code.

  It’s been said that any time spent commenting on your code now might save …

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• Guru: Dealing With RPG Errors and Embedded SQL

  April 8, 2019 Ted Holt

  Hey, Ted! I’m having trouble using some of the new techniques I learned at the RPG and DB2 Summit. Below is a screen shot of a program I am writing. I cannot figure out why the compiler doesn’t like it. Can you see anything that would be causing the declarations to fail?

  — Mike

  I glanced over Mike’s code and noticed that he used a correlation name in the SELECT and WHERE clauses, but did not define that correlation name for any of the tables, like this:

  SELECT x.onefield, x.twofield, x.redfield, x.bluefield
  FROM MYTABLE
  WHERE x.onefield = :TestValue;
  

  He …

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• Building Out The .NET Stack Around Mono for IBM i

  March 13, 2019 Alex Woodie

  The first release of a Mono .NET port to IBM i was issued last year. Since then, the IBM i open source community has been busy building many of the other middleware components that will make it easier for developers to build IBM i applications using Microsoft tooling.

  Mono was ported to AIX and IBM i (via the PASE AIX runtime) last year, which gave IBM i and AIX shops the capability to run the open source .NET runtime on Power Systems servers, thus opening the door to allowing Microsoft‘s highly regarded suite of development tools to be …

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• IBM i Has Been Getting With The Program For Years

  February 4, 2019 Timothy Prickett Morgan

  There are many things that one could constructively criticize IBM about when it comes to the Power Systems platform running the IBM i operating system. But, in recent years at least, one of those things would not be – and could not be – that the company has not done enough to embrace the most important elements of the modern programming toolbox.

  In fact, the company has done and increasingly good job of embracing and extending the compilers, interpreters, frameworks, and models of the programming languages that have gone mainstream since Java first took the stage at the beginning of …

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• Guru: Speed Up Command-Line PHP

  January 21, 2019 Alan Seiden

  While PHP runs quickly via the Apache web server, command-line PHP scripts (run from PASE directly or via CL or RPG) have a lag on start-up. In this article, I show how to speed up PHP when called from the command line (known as PHP-CLI).

  Why does PHP-CLI (command line PHP) have a slow start-up? While several reasons are often given, I’ve found the culprit to be the loading of PHP extensions that are enabled by php.ini and other configuration files of Zend Server. Examples of extensions are ibm_db2, simplexml, and Zend’s proprietary components.

  Within a normal web server environment, …

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• Guru: Addressing A Legitimate Question

  December 10, 2018 Ted Holt

  This is the last Monday issue of The Four Hundred for 2018. My, how time flies! I like to do something different at year end. In previous years I have solved Sudoku puzzles, found my way through mazes, solved the peg game, and more. This year I wish to honor a request that has come from various people and to address what they consider to be a legitimate question.

  As I wrote recently, the question I hear occasionally goes something like this: “Why bother with service programs? Why not use dynamic calls?” Rather than insult the …

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• Guru: When Is An Error Not An Error?

  November 26, 2018 Jon Paris

  When is an error not an error? When it is expected! In this article I want to discuss the use of RPG’s MONITOR op-code and discuss ways in which it might change the way you code RPG. I was prompted to write up my thoughts on this subject as a result of being quizzed by students at a recent RPG & DB2 Summit as to why I was using Monitor blocks rather than more conventional RPG techniques in my examples.

  So what do I mean by expected? Basically I mean those errors that you know are going to happen …

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