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Author Archives: Dustin Marx

Will StackOverflow Documentation Realize Its Lofty Goal?

StackOverflow.com has had a huge impact on software development. Although I agree with Fred Brooks that there is no silver bullet in software development, StackOverflow.com has certainly played a significant role in developers learning quicker from others’ experiences, being able to learn from many more peoples’ experiences, and being more productive. StackOverflow.com allows developers to benefit from the advantages of ...

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Infinispan Versions Mapped to Minimum Java Versions

java-interview-questions-answers

I’ve been playing around a little bit with Infinispan recently and one of the characteristics of this “distributed in-memory key/value data store” that I have noticed is its relatively aggressive adoption and even requirement of later major versions of Java. The following maps Infinispan releases to minimum required Java SE versions per referenced Infinispan documentation. Infinispan Versions and Their Minimum ...

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Applying JDK 9 @Deprecated Enhancements

I discussed the currently proposed JDK 9 enhancements for the @Deprecated annotation in the blog post JDK 9 @Deprecated Annotation Enhancements. In this post, I look in greater detail at the recommended usage of these minor enhancements and demonstrate how key Java SE APIs are already having these @Deprecated enhancements applied. The current version of the main JEP 277 (“Enhanced ...

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JDK 9 @Deprecated Annotation Enhancements

In the post What Might a New @Deprecated Look Like?, I used the description of JEP 277 (“Enhanced Deprecation”) at that time to guide the creation of an enhanced customized @Deprecated annotation. Since that post, however, there have been significant changes made in JEP 277. This post summarizes the changes and the currently planned enhancements to @Deprecated that are slated ...

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SPOOLing Queries with Results in psql

SQL*Plus, the Oracle database‘s command-line tool, provides the SPOOL command to “store query results in a file.” The next screen snapshot shows SPOOL used in SQL*Plus to spool the listing of user tables to a file called C:\pdf\output.txt.                 Both the executed query and the results of the query have been spooled to ...

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Remembering to Reset Thread Context Class Loader

I’m having a difficult time thinking of anything I like less about working with Java than working with class loaders. This is particularly true when working with application servers or OSGi where the use of multiple class loaders is prevalent and the ability to use class loaders transparently is reduced. I agree with the OSGI Alliance Blog post What You ...

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Log4j 2.x XSD is Not Fully Descriptive

In the blog post JAXB and Log4j XML Configuration Files, I discussed “nuances and subtleties associated with using JAXB to work with [Log4j 1.x and Log4j 2.x] XML configuration files via Java classes.” In this post, I look at another challenge associated with generation of Log4j 2.x configuration XML via JAXB objects generated from the Log4j 2.x XML Schema file ...

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JAXB and Log4j XML Configuration Files

Both Log4j 1.x and Log4j 2.x support use of XML files to specify logging configuration. This post looks into some of the nuances and subtleties associated with using JAXB to work with these XML configuration files via Java classes. The examples in this post are based on Apache Log4j 1.2.17, Apache Log4j 2.6.2, and Java 1.8.0_73 with JAXB xjc 2.2.8-b130911.1802. ...

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Apache PDFBox Command-line Tools: No Java Coding Required

In the blog post Apache PDFBox 2, I demonstrated use of Apache PDFBox 2 as a library called from within Java code to manipulate PDFs. It turns out that Apache PDFBox 2 also provides command-line tools that can be used directly from the command-line as-is with no additional Java coding required. There are several command-line tools available and I will ...

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Apache PDFBox 2

Apache PDFBox 2 was released earlier this year and Apache PDFBox 2.0.1 and Apache PDFBox 2.0.2 have since been released. Apache PDFBox is open source (Apache License Version 2) and Java-based (and so is easy to use with wide variety of programming language including Java, Groovy, Scala, Clojure, Kotlin, and Ceylon). Apache PDFBox can be used by any of these ...

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