More and more services are moving onto the public clouds and so are the cost related escalating following are some general approaches that can be taken to optimize the cost of cloud usage. Consolidate AWS accounts there should not be multiple accounts for the same company/business unit the advantage with this approach is to gain
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How to update a live heavy traffic system with minimum or zero downtime is always an important thought in following I have discussed a few procedures that can be used to update a live site with minimum or not downtime If the services are exposed through a load balancer in front for example Nginx then
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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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Recently I used AES encryption using Java. AES is an efficient algorithm for encryption. You can benefit from the helper class I wrote to perform the encryption and decryption using AES. To read mode about the AES encryption please follow this link AES Encryption Wiki Following is link to AES Helper source code AES Helper
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Following is the script that can be used to deploy application to Apache tomcat running on a Linux machine. Also this script can be called from a Jenkins to automate the deployment process. The script file can be downloaded from HotDeployScript #/bin/bash#/bin/bash # . ~/.profile export APP_ID=$1export URL1="http://localhost:8257/myWebApp/mvc/" export CHECK_URLS="$URL1" export CATALINA_HOME=/opt/myWebApp/tomcat7/ export CATALINA_BASE=$CATALINA_HOME echo CATALINA_HOME:
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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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Was contacted recently by PACKT publishing to act as technical reviewer for Test driven java development book by Viktor Farcic and Alex Garcia. I accepted the challenge and reviewed around 10 chapters. It a nice overview book which touch almost all the concerns in test driven application development without diving deep into details and you
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Using Java 8 and Gradle I had to generate XSD schema. Most of the Gradle plugins out there are not compatible with Java 8 yet. So I tweaked my way and following is how I did it. I had following model class supporting both JAXB and JSON. @XmlType(namespace = "http://com.invalid/1.0/request/schema") @XmlAccessorType(XmlAccessType.FIELD) @XmlRootElement(name = "Person") @JsonRootName(value
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Its always a pain point to test application on different operating systems with all the dependency software installed that your application might require. It would be nice if we get a pre-configured box where we add all the required softwares (databases, web servers etc.) and just use one command to bring it up and later
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