1. Creating Threads in Java 1.1 Extending the Thread Class public class MyThread extends Thread { public void run() { // Code to be executed in the new thread for (int i = 0; i < 5; i++) { System.out.println("Thread Read more…
Set up dependency <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> Configuring JPA and Hibernate in application.properties file spring.datasource.url=jdbc:mysql://localhost:3306/dbname spring.datasource.username=root spring.datasource.password=password spring.jpa.hibernate.ddl-auto=update or application.yml spring: application: name: demoapp datasource: url: jdbc:mysql://localhost:3306/dbname username: root password: password driver-class-name: com.mysql.cj.jdbc.Driver jpa: hibernate: ddl-auto: update show-sql: true open-in-view: Read more…
DockerFile Reference: https://docs.docker.com/reference/dockerfile/ Best practices for Dockerfile instructions: https://docs.docker.com/develop/develop-images/instructions/
Import from rootfs archive Format: docker import [options] <file>|<URL>|- [<repository name>[:<label>]] The tarball can be a local file, a remote web file, or even from standard input. The tarball will be expanded in the mirror / directory and submitted directly Read more…
From the previous docker commit, we saw that customizing an image is really just customizing the configuration/files that are added at each layer. If we could write each layer of modify, install, build, and manipulate commands into a script, and Read more…
Note: The docker commit command has some special applications beyond learning, such as saving the scene after an intrusion. However, do not use docker commit to customise images; customising images should be done using Dockerfile. Images are the foundation of Read more…
Fetch Mirrors The command to fetch an image from the Docker image repository is docker pull. the command format is: $ docker pull [options] [Docker Registry address[:port number]/] repository name[:label] The specific options can be seen with the docker pull Read more…
Image As we all know, the operating system is divided into kernel and userspace. For Linux, after the kernel starts, it mounts a root filesystem to provide userspace support. A Docker image is the equivalent of a root filesystem. For Read more…
What is Docker? Docker was originally started as an internal project by dotCloud founder Solomon Hykes while he was in France. It is based on years of innovation in dotCloud’s cloud services technology and was open-sourced under the Apache 2.0 Read more…
Elasticsearch (sometimes dubbed ES) is a modern search and analytics engine which is based on Apache Lucene. Its built with Java, Elasticsearch is a NoSQL database. That means it stores data in an unstructured way and that you cannot use Read more…