evergreenskills

Wednesday, September 25, 2019

Non-Blocking/Asynchronous API(s) using Java 8 and above

A Good Style of explaining the evolution of Java API(s) to achieve Concurrency.

https://www.callicoder.com/java-concurrency-multithreading-basics/

Analogy/Use Scenario Visualization:
(*) If you are core busniess layer, who need to integrate with legacy Java components ( which are the actual workhorses ) and you are being called from upstream busniess layers, there is always a need for Asynchronous invocation.
This is where following article

https://www.callicoder.com/java-8-completablefuture-tutorial/
best explains concepts

Prerequistie : Java Lamba familarity, Supplier , Consumer , functional interfaces in Java

Other Analogies:
1) SwingWorker in old AWT/applet kind of application
2) Promise in JavaScript
3) Work delegation and collating back (Typical Manager)

Tuesday, August 6, 2019

Micro services - Quick tutorial links

Official reference
https://cloud.spring.io/spring-cloud-static/spring-cloud.html

Concise
https://howtodoinjava.com/spring-cloud/spring-cloud-service-discovery-netflix-eureka/
https://dzone.com/articles/time-to-step-up-your-microservices

Also I love IBM documentation. Please refer to steps on their portal. Great ones.

Tuesday, March 20, 2018

Writing Application code is getting harder in the Software Industry

In 1990s
Write code to meet basic functionality.
* Optional to consider other software attributes
You were done.

In 2000s
Write code to meet basic functionality, using a MVC framework, so that extending/enhancing is modular and easy.
Are they platform independent and run on any browsers ?
* Optional to consider other software attributes
You were done.

In 2010s
Write code to meet basic functionality, using a MVC framework, so that extending/enhancing is modular and easy.
Are they platform independent and run on any browsers ?
Is application Web Security Compliant ?
Is application Internationalization Compliant ?
Is application Accessibility Compliant ?
+ Mandatory to consider other software attributes
You were done.

In 2020s
Write code to meet basic functionality, using a MVC framework, so that extending/enhancing is modular and easy.
Are they platform independent and run on any browsers ?
Is application Web Security Compliant ?
Is application Internationalization Compliant ?
Is application Accessibility Compliant ?
Is use scenarios Automated for testing ?
Is use scenarios Compliant for machine learning ?
+ Mandatory to consider other software attributes
You were done.

So, your simple 'Hello World' or 'addition' program will mean a lot for getting it done, what it took 40 years ago.

Wednesday, September 6, 2017

Designing a database for multi-tenancy on the cloud

https://www.codeproject.com/Articles/51334/Multi-Tenants-Database-Architecture
https://purikl.wordpress.com/
https://msdn.microsoft.com/en-us/library/aa479086.aspx#mlttntda_topic1

https://www.codeproject.com/Articles/3435/Secure-Architecture-Design-Methodologies
https://www.codeproject.com/Articles/16105/A-Practical-Approach-to-Computer-Systems-Design-an

https://www.codeproject.com/Articles/124732/Software-Development-Methodologies

Monday, October 20, 2014

Brushing up Struts 2x MVC framework

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http://www.journaldev.com/2173/struts-2-actions-example-tutorial

http://www.journaldev.com/2230/struts-2-data-tags-example-tutorial
http://www.journaldev.com/2237/struts-2-control-tags-example-tutorial
http://www.journaldev.com/2266/struts2-ui-tags-example-tutorial

http://www.journaldev.com/2221/struts-2-ognl-tutorial-with-custom-type-converter-example
http://www.journaldev.com/2296/struts2-execandwait-interceptor-example-for-long-running-actions
http://www.journaldev.com/2281/struts2-token-interceptor-to-handle-double-form-submission-problem

http://www.journaldev.com/2178/struts-2-action-object-backed-and-modeldriven-example

http://www.journaldev.com/2274/struts2-action-errors-and-action-messages-example

http://www.journaldev.com/4490/primefaces-selective-components-checkbox-button-radio-button-tutorial

http://www.journaldev.com/2247/struts2-and-log4j-integration-example-project

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Other very good links to refresh your skills in IT industry and exposure.

http://www.journaldev.com/470/generate-qr-code-image-from-java-program

http://www.journaldev.com/1370/java-internationalization-i18n-example-tutorial
http://www.journaldev.com/2304/struts2-resource-bundles-and-localization-example

http://www.journaldev.com/2421/struts2-exception-handling-example-tutorial

http://www.journaldev.com/2513/tomcat-datasource-jndi-example-for-servlet-web-application

http://www.journaldev.com/1997/servlet-example-in-java-with-database-connection-and-log4j-integration

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http://www.journaldev.com/1240/java-xml-tutorial

http://www.journaldev.com/2544/java-csv-parserwriter-example-using-opencsv-apache-commons-csv-and-supercsv

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http://www.journaldev.com/2315/java-json-processing-api-example-tutorial

This links explains the type of JDBC driver.
http://www.journaldev.com/2471/jdbc-example-tutorial-drivers-connection-statement-resultset

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http://www.journaldev.com/2509/jdbc-datasource-example-oracle-mysql-and-apache-dbcp-tutorial

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http://candidjava.com/struts-2-datepicker-example-and-tutorial

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Thursday, March 21, 2013

Typical voice features jargon.

Courtesy Wikipedia
http://en.wikipedia.org/wiki/IP_PBX

Tuesday, March 19, 2013

Linux Commands Revisited Open projects Revisited Documentation style Revisited