Author Archives: Roger Lacroix

My name is Roger Lacroix and I am a die hard programmer. I have been programming since the 80s. My favorite programming languages are Java, C and Rexx. I have worked in the airline, retail but I have spent most of my time doing middleware work in the financial services industry. In 1994, I was introduced to IBM MQ (aka WebSphere MQ & MQSeries) and I thought it was the next best thing since man created fire. This blog will be about IBM MQ, Java, C, Rexx and any other interesting items that I can think of. I hope you enjoy it.

NBR: Hiding In Plain Sight: Embedded Device Security

August 8, 2019 Roger Lacroix
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Here’s an NBR (Nightly Business Report) segment on embedded device security. They explained embedded device security issues so that the average user will understand it. Everyone should watch this 4 minute segment: Regards, Roger Lacroix Capitalware Inc.

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Tuning Java Programs for Optimum MQ Get API Calls Performance

August 6, 2019 Roger Lacroix
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You should really read this blog posting first. The results of some of the test scenarios below, simply do not make any sense. I would like to think there is some sort of logic behind it but it is probably lack of testing by IBM that introduced some bugs in the code or should I […]

IBM i (OS/400), IBM MQ, Java, Linux, macOS (Mac OS X), Programming, Unix, Windows, z/OS Comments Off on Tuning Java Programs for Optimum MQ Get API Calls Performance

Tuning JMS Programs for Optimum MQ Get API Calls Performance

August 2, 2019 Roger Lacroix
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On Wednesday, I decided to do some testing of some simple (1) MQ for JMS, (2) MQ for Java and (3) procedure language (i.e. amqsbcg) programs to show that using the JVM environment variable of com.ibm.mq.jmqi.defaultMaxMsgSize with an appropriate size could make a JMS application 10 to 15% faster because there would not be any […]

IBM i (OS/400), IBM MQ, Java, JMS, Linux, macOS (Mac OS X), Programming, Unix, Windows, z/OS Comments Off on Tuning JMS Programs for Optimum MQ Get API Calls Performance

IBM MQ Fix Pack 9.1.0.3 Released

August 1, 2019 Roger Lacroix
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IBM has just released Fix Pack 9.1.0.3 for IBM MQ V9.1 LTS: https://www.ibm.com/support/docview.wss?uid=ibm10961534 Regards, Roger Lacroix Capitalware Inc.

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MQ JMS Double Get API Calls

July 25, 2019 Roger Lacroix
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Tuning applications is always a good thing. 🙂 Colin Paice has reminded me of the MQ JMS default value for an MQGET buffer size is 4KB in his blog posting here. IBM’s default value of 4KB is far too low to be useful. Having such a low value causes excessive number of MQ JMS Get […]

IBM i (OS/400), IBM MQ, Java, JMS, Linux, macOS (Mac OS X), Programming, Unix, Windows, z/OS Comments Off on MQ JMS Double Get API Calls

SQLite v3.29.0 Released

July 10, 2019 Roger Lacroix
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D. Richard Hipp has just released SQLite v3.29.0. http://www.sqlite.org/news.html SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. The source code for SQLite is in the public domain. Regards, Roger Lacroix Capitalware Inc.

C, Database, IBM i (OS/400), Linux, macOS (Mac OS X), Open Source, Programming, Unix, Windows, z/OS Comments Off on SQLite v3.29.0 Released

IBM MQ V9.1.3 Announced

July 9, 2019 Roger Lacroix
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IBM has announced IBM MQ V9.1.3 for Multiplatforms: https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/4/897/ENUS219-254/index.html Planned availability for IBM MQ V9.1.3 is July 11, 2019 for Electronic software delivery. IBM has announced IBM MQ V9.1.3 for z/OS: https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/7/897/ENUS219-257/index.html Planned availability for IBM MQ V9.1.3 for z/OS is August 2, 2019 for Electronic software delivery. IBM has announced IBM MQ V9.1.3 for […]

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C# .NET MQ Code to Subscribe to a Topic

July 5, 2019 Roger Lacroix
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The other day I answered a question on StackOverflow about subscribing to a topic using C# .NET code. I figured I should also post the code here for everyone to read & use. You can download the source code from here. Regards, Roger Lacroix Capitalware Inc.

.NET, C#, IBM MQ, Linux, Open Source, Programming, Windows Comments Off on C# .NET MQ Code to Subscribe to a Topic

Capitalware Products Minimum MQ Level Changed

July 3, 2019 Roger Lacroix
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The minimum IBM MQ level for the following Capitalware products (distributed platforms) is now IBM MQ v7.1 (or higher): MQ Auditor MQ Authenticate User Security Exit MQ Message Encryption MQ Message Replication MQ Standard Security Exit Regards, Roger Lacroix Capitalware Inc.

Capitalware, IBM i (OS/400), IBM MQ, Linux, MQ Auditor, MQ Authenticate User Security Exit, MQ Enterprise Security Suite, MQ Message Encryption, MQ Message Replication, MQ Standard Security Exit, Unix, Windows Comments Off on Capitalware Products Minimum MQ Level Changed

Capitalware Products 2019 Release Train

June 29, 2019 Roger Lacroix
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Here is a summary of all the recent releases that Capitalware Inc. has published: Blog posting for product releases: MQ Auditor v3.1.0 MQ Authenticate User Security Exit v3.4.0 MQ Authenticate User Security Exit for z/OS v3.4.0 MQ Channel Connection Inspector v1.1.0 MQ Channel Connection Inspector for z/OS v1.1.0 MQ Channel Encryption v3.3.0 MQ Channel Encryption […]

Capitalware, IBM i (OS/400), IBM MQ, Linux, MQ Auditor, MQ Authenticate User Security Exit, MQ Channel Connection Inspector, MQ Channel Encryption, MQ Channel Throttler, MQ Enterprise Security Suite, MQ Message Encryption, MQ Message Replication, MQ Standard Security Exit, Unix, Windows, z/OS Comments Off on Capitalware Products 2019 Release Train