Category: Hacks

Importing large CSV to postgres database

Muhammad Ali Cloud, Databases, Hacks December 7, 2020

When importing very large csv files to database we might first try to use the import functionality on tools like DBeaver but sometime with large dataset it can take you hours and also can incur extra costs on data transfer if your database is in another VPC and you are trying to do it over
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XPath fetch dynamic http header values

Muhammad Ali Hacks, Java, Tibco February 6, 2019

Following is an XPath that can come in handy to read name value pair elements. Basically this is done for reading tibco dynamic headers which comes as a repeated header containing name and value elements but the below xpath can be used for any XML document processing. Below is the XML and XPath example The
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Tibco EMS Linux installation allow dynamic creation of queues and topics

Muhammad Ali Hacks, Message Brokers, Tibco January 20, 2019

If you are installing Tibco on Linux and are using EMS in domain utility, there are several queues and topics that Tibco admin will try to create during startup and domain creation. The default setting of EMS is not to allow dynamic creation of queues and topics this will result in admin to fail at
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Hotswap for Java using DCEVM+Hotswap Agent

Muhammad Ali Hacks, Java May 4, 2017

Here is an opensource setup that does the job as JRebel which offcourse is not free. Download HotswapAgent latest release from this url https://github.com/HotswapProjects/HotswapAgent/releases Download DCEVM jar from the following url https://github.com/dcevm/dcevm/releases Install DCEVM as an administrator java -jar DCEVM-light-8u112-installer.jar Create a new run configuration in intelliJ with following VM option -XXaltjvm=dcevm -javaagent:C:\Dev\sw\HotswapAgent-0.3\hotswap-agent.jar -Xms1G -Xmx5G
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