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Handling unexpected runtime exception inside Thread. thread.setUncaughtExceptionHandler

Create and set UncaughtExceptionHandler before starting new thread to catch unexpected runtime exception in Multithreading application. package demo; public class ExceptionHandler {     public static void main(String[] args) {         Thread thread = new Thread(new Runnable() {             @Override             public void run() {                 throw new RuntimeException("Critical Error");             }         });         System.out.println("Starting new thread " + Thread.currentThread().getName());         //Throw this exception if any exception has occurred inside running thread but was not caught anywhere else         //This should be set before starting the new thread         thread.setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {             @Override             public void uncaughtException(Thread thread, Throwable throwable) {                 System.out.println("Error occurred on thread: " + thread.getName() + ". Reason :
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Setting the custom name for Thread in Java

Setting the custom name for Thread in Java. Printing the Thread running sequence. package demo ; public class Main { public static void main ( String [] args ) throws InterruptedException { Thread thread1 = new Thread ( new Runnable () { @Override public void run () { //execute after getting instruction from OS System . out .println ( "Inside and running thread " + Thread . currentThread () .getName ()) ; System . out .println ( "Current priority " + Thread . currentThread () .getPriority ()) ; } }) ; thread1 .setName ( "Custom Worker Thread" ) ; thread1 .setPriority ( Thread . MAX_PRIORITY ) ; System . out .println ( "We are in thread " + Thread . currentThread () .getName () + " before new thead" ) ; thread1 .start () ; //start the thread and inform the OS System . out .println ( "We are
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Docker Cheatsheet, Basic Docker commands

Docker Cheatsheet, List of Basic docker commands $ docker run <containerId> #run docker container, first checks locally, if not found pull from remote repository $ docker stop <containerId> #stop docker container $ docker ps -a # list all the containers $ docker rm <containerId> # delete docker container $ docker rm $(docker ps -a -q -f status=exited) #deleted all the exited docker container $ docker commit <container-id> <image-name> $ docker search <imageName> #same as git repo $ docker pull <imageName> #same as git pull list network $ docker network ls create network $docker network create <networkName> inspect docker network $ docker network inspect <networkName> run container and attach to network $docker run -it --net=<networkName> <containerName> run multiple container in same network $docker run -it --net=bridge <containerName> $docker run -it --net=container:<containerName> <containerNa
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Spring Security with Spring Boot and MySQL

Spring Security with Spring Boot and MySQL In this tutorial I'll show how to use Spring Security with Spring Boot and MySQL. We'll implement a UserDetailsService provided by Spring Security. It is easy to configure Spring Security with Spring Boot and MySQL. You can also check how to run Spring Boot application inside docker container Steps: 1. Create a Spring Boot project from start.spring.io with following dependencies in your pom.xml file. You can choose gradle also for project dependencies. <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- dev tools for hot reloading --> <dependency> <groupId>org.springframework.b
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How to run Spring Boot application inside docker container

Step by Step procedure in creating and running a simple Spring Boot application inside docker container This tutorial will show you on how to run simple Spring Boot application inside docker container. If you have not installed docker already, please install it first. I'm using Linux Mint 18.2. You can follow these steps on How To install Docker in Linux Mint 18.2 After you've successfully installed docker in your machine, let's create a docker image that will run inside the container. Create a simple Spring Boot project from here . Select Web as a dependency. Import the project into you IDE, I'm using Spring Tool Suite. Create a controller and name it HelloController. You can name your controller anything you like. Create a method that will map the request and return a response. Create Dockerfile at the root of the project. The name is important here, only the letter D is capital Make the following entries inside the Dockerfile #Enter all the requi
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How To install Docker in Linux Mint 18.2

How To install docker in Linux Mint 18.2 Codename: sonya Docker is a Container as a service (CaaS) platform which helps to eliminate "works in my computer" problems when working together with other members in the team. More here Docker for Linux Mint is availabe as a free Community Edition (CE). Installation is easy and straigh forward. We will install a stable release of docker. OS Requirements Linux Mint 18.2 (LTS) Architecture: x86_64 If you've the older version installed already, uninstall it $ sudo apt-get remove docker docker-engine docker.io Add repositories $ sudo apt-get install apt-transport-https ca-certificates curl software-properties-common $ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - Since, Linux Mint 18.2 (sonya) is based on Ubuntu 16.04 (xenial), we've to use the release codename of Ubuntu 16.04 i.e. xenial. Also, we'll use the latest stable version $ sudo add-apt-repository "deb [arch=a
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