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Run a task in a different interval during weekend using Spring Scheduler and Custom Trigger

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Run a task in a different interval during weekend. Instead of defining fixed interval to run a task every 1 minute (as shown in example belo...

Append a file into existing ZIP using Java

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  The following code reads a input file 'in.zip' appends 'abc.txt' with some String content into it and creates output zip f...

Spring Boot - get Trace and Span ID programmatically

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 Autowire   Tracer tracer and get traceId and spanId from current Span Span span = tracer .currentSpan(); span .context().traceId() //trace ...

8 puzzle solver using A* algorithm

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  8-puzzle is a very interesting and a well known problem in the field of Artificial Intelligence. It always has been an important subjec...

JSP basics - Java Server Pages

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  The JSP - Java Server Pages JSP extension of the servlet technology which offers both scripting ( as in HTML) as well as programming (as ...

How to reset “Replace Toner” warning on Brother MFC-L2710DW Printer

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How to reset “Replace Toner” warning on Brother  MFC-L2710DW Printer and print ~100 more pages without replacing the toner!   Open the fr...

Java PDF to Image Conversion using PDFBox

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Here are few snippets of code that you can use to convert a PDF file to images eg: tiff, png, multi-page tiff. It uses a open source library...

git reset/revert to previous commit

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Sometimes we "accidentally" merge something that's not ready for release/qa  and need to rollback/reset/revert the commits to ...

How to make integration tests faster without @DirtiesContext

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If your only excuse to use @DirtiesContext is to re-initialize database between tests, then this blog post is for you. Spring's @Dirties...