Introduction The last few released of Java namely Java 7, Java 8 and the upcoming Java 9 have quite a lot of features which makes the life of Java developers easier. (I […]
Index Data from a Relational Database into Elasticsearch – 2
In my previous article, we showed a straight forward way to index data from the relational database into Elasticsearch. In this article we will show you: Create mappings for the index Understand the […]
Index Data from a Relational Database into Elasticsearch – 1
Elasticsearch provides powerful search capabilities with support for sharding and replication of the data. So we would want to index data available in our DB into Elasticsearch. There are multiple ways to […]
Shell Script to Detect If the IP Address Is Googlebot
1. Introduction Google has explained here on how to verify if the given IP belongs to Googlebot. So instead of hard-coding all the IPs which might change eventually, Google has suggested doing […]
A stupid Mistake
the above mistake cost me close to 1 hour. Can you spot the mistake? I tried all these possibilities: model.put(“validation_success”,1); model.put(“validation_success”,true); model.put(“validation_success”,”true”); and then realized my stupid mistake. I have installed sonar […]
Behavior Driven Development (BDD) of Postfix calculator
What is a postfix expression? An expression where in the operator is placed after the operands is called a postfix expression. For example an expression (also called infix expression) 2 + 3 […]
Gotcha: Migrating from Spring Security 3.2.x to Spring Security 4.x
Here is a simple gotcha to keep in mind while migrating to newer Spring Security version 4.x from Spring Security 3.2.x What’s the problem? The Spring security configuration expressions hasRole(‘role_name’) and hasAuthority(‘role_name’) […]
Command to find files from windows command prompt
So if you want to find files with a given extension in windows, this is how you would do: where, /r says recursively search and match for files with given pattern, and […]
New @RequestParam annotations in Spring Boot 1.4 (Spring Framework 4.3)
Earlier in Spring/Spring Boot to Map a GET or POST or DELETE or any HTTP method request handler we would write something like below: But with Springframework 4.3 and Spring Boot 1.4 […]
Java Gotcha: Parse string using SimpleDateFormat with months greater than 12
I was the other day trying to parse a date string into a date object using SimpleDateFormat to check for the validity of the date string. I had the SimpleDateFormat defined as: […]
