Building real-time chat app using WebSockets with AWS API Gateway and Lambda
We can build many real-time applications such as chat applications, multiplayer games, financial trading platforms, and collaboration platforms using WebSockets with AWS API Gateway, Lambda, and dynamoDB. In this blog we will learn how to build real-time applications using WebSockets
Adding Google Map in web page using Javascript
How to add Google Map in your project and show markers and InfoWindows for various locations using HTML and Javascript. Google Map API is one of the most used APIs in websites and projects. We can use the API to
SVN Switch
I am assuming you are working on code from branch A (it may be trunk as well) and have already made some changes locally. Now you find you can’t commit your changes to SVN because they are not stable yet.
Introduction to DataBase Isolation Levels
Introduction to DataBase Isolation Levels Transaction specifies an isolation level that defines the degree to which one transaction must be isolated from resource or data modifications made by other transactions. Isolation Levels are described in terms of side-effects of concurrent
Java | SSL and SSLHandshakeException for self-signed websites
What are secure SSL Certificate? Secure SSL certificate is used by most of the websites to prevent private and secure information of their users so that no third party could access them. When an SSL certificate is used, it encrypts
Linux – Get full path of a running process
2 ways that I know to get the full path of a process in linux: 1. /proc/ /exe is a symlink to the actual exe. Here’s what I get for a program eclipse running on my machine under pid 4825
Java | int and float overflow and underflow with examples
First we should know what is overflow and underflow. Overflow is a condition where value crosses the maximum prescribed size of a data type. Underflow is a condition where value reaches the minimum prescribed size of a data type. With
Selenium | Take UI screenshots when script is executed
During testing a website with Selenium, function given below can take screenshot that can help us in cases like when testcase fails and we need the screenshot to see what happened on UI. Here is function to take screenshot: public
Java | Wide and Narrow typecast in Java with examples
Cast means converting one data type to another data type. Automatic Type Conversion Automatic type conversion means programmer doesn’t need to write code for the cast. In Automatic Type Conversion, narrower data type is converted to broader data type automatically
Java | static variables, instance variables, final and static
Explain with an example which variables should become instance variables and which others should become static. Also when to use final with static and final without static? (JAVA) INSTANCE VARIABLES: Variables that belong to the object of the class and