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JavaWeb Fundamentals JavaWeb encompasses the technology stack used to build web-based applications using the Java programming language. The standard architecture for these applications is the Browser/Server (B/S) model. In this paradigm, the client requires only a web browser, while all application logic and data storage are maintained on the ...

By default, Spring Boot applications are packaged as executable JARs with an embedded Tomcat server. While convenient for development and microservices, this approach has limitations in certain scenarios—particularly when dealing with file uploads that need to persist acrross application restarts. Since the embedded server starts fresh each tim ...

After installing Apache Tomcat on a CentOS server, you can successfully access it via http://localhost:8080 from the local machine. However, attempts to reach the server from other devices on the same network fail, eventhough ICMP ping requests are answered. The root cause is typically the system firewall blocking incoming connections on port 8 ...

Classpath Configuration Classpath defines locations where the JVM searches for compiled classes, libraries, and resources during execution. It can be specified via: Command line: java -cp app.jar;libs/* com.sample.MainApp Environment variable: set CLASSPATH=app.jar;libs/* Executable JAR manifest: Class-Path: libs/dep1.jar libs/dep2.jar Tomca ...

Creating a New Project Launch IntelliJ IDEA and initiate a new project by providing the necessary details, then proceed with creation. Configuring Web Support Once the project is created: Add web framework support to the project If the option is missing, use the action search feature: Select the project, press Shift twice rapidly, type "A ...

Tomcat Architecture OverviewApache Tomcat operates as a robust Servlet container, managing the lifecycle of web applications and handling client requests. Its architecture is fundamentally divided into two core modules: the Connector (Coyote) and the Container (Catalina). This separation of concerns allows Tomcat to decouple network communicati ...

Java Enterprise Context The Java Enterprise Edition (JavaEE) specification, former known as J2EE, defines standards for enterprise application development. Managed by the Java Community Process (JCP), it includes technologies like Servlets, JSP, JDBC, and JPA. The current version is JavaEE 8. Web Fundamentals The World Wide Web (WWW) provides a ...

Testing Default Request Handling Capacity A standard Spring Boot project created with minimal configuration will be analyzed to determine its concurrent request handling capabilities. The test setup uses Spring Boot 2.7.13 with only essential dependencies included. The test controller accepts requests and holds the thread for an extended period ...

Setting Up Java Web Environment on Ubuntu Running a Java Web Archive (.war) file on Ubuntu requires a servlet container like Apache Tomcat. This guide explains the complete deployment process. Java Installation Java is essential for executing .war files as they are Java-based web applications. Verify Java Installation Check if Java is alre ...

Standard Workflow # Search for available images docker search <image_name> # Download an image to the local machine docker pull <image_name> # Verify the downloaded image docker images # Launch a container from the image docker run [options] <image_name> # Halt a running container docker stop <container_id> # Delete ...