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03a: ⏯ Spring Boot Web & Actuator Beginner Video Tutorial

Related Links 1. Spring Boot Web & Actuator Beginner Tutorial Step by Step. 2. Simple Spring Boot Tutorial in 8 steps. Spring Boot Interview Q&As 11 Spring boot interview questions & answers. … Read more ›...

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03a: ⏯ Spring MVC with Java Configs instead of XML configs video tutorial

Related Links 1. Spring MVC with Java Configs instead of XML configs step by step – No web.xml. Extends Video Tutorials 1. ⏯ Spring MVC form submission video tutorial step by step. … Read more ›...

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04: Akka tutorial “tell-tell” request – response pattern in Java

This tutorial extends the previous tutorial Simple Akka tutorial in Java step by step and Akka tutorial “ask” request – response pattern in Java. Step 1: The “Producer.java” is an actor now. It receives messages from both “ProducerConsumerMain.java”, which is a “DeadLetterActorRef” … Read more ›...

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04: Docker Tutorial – mount a host directory in a Docker container

mount a host directory into a Docker container so that the folders & files in the host will show up in the Docker container after building the dockerfile. There are a couple ways you can do this. Option 1: ADD In this approach, any changes made to this directory on...

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04: Drools with rules in an excel spreadsheet – Data validation

This tutorial uses Drools as a validation engine to validate an input csv file. The rules are maintained externally in an excel spreadsheet. Step 1: Create a new Maven project

mvn archetype:generate -DgroupId=com.mytutorial -DartifactId=myDroolsTutorials -B

1	mvn archetype:generate -DgroupId=com.mytutorial -DartifactId=myDroolsTutorials -B

“-B” means interactive mode is false. Import it into eclipse or IDE of your choice as a maven project....

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04: Install AWS CLI to intercat with AWS services like S3

Install Python & pip Step 1: Check if python is already installed. Ubuntu ships with both Python 3 and Python 2 pre-installed.


$ python -V
$ python3 -V

$ python -V

$ python3 -V

if already installed, make sure that the versions are up-to-date, as it needs to be either 3.3+ or 2.7+.


$ sudo apt-get update
$ sudo apt-get -y upgrade

$ sudo apt-get update

$ sudo apt-get -y upgrade

If not, … Read more ›...

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04: JasperReport generating a PDF file

This is an extension to the JasperReport step by step tutorial (Part-1) to demonstrate how to generate a a PDF file from the Main.java. To generate a PDF file you need the iText.jar as a dependency. Here are the Maven dependency files required.

<!-- Jasper reports -->
<dependency>
 <groupId>net.sf.jasperreports</groupId>
 <artifactId>jasperreports</artifactId>
 <version>5.0.1</version>
</dependency>
<dependency>
 <groupId>org.codehaus.groovy</groupId>
 <artifactId>groovy-all</artifactId>
 <version>2.1.1</version>
</dependency>
<dependency>
 <groupId>com.lowagie</groupId>
 <artifactId>itext</artifactId>
 <version>2.1.7</version>
</dependency>

<groupId>net.sf.jasperreports</groupId>

<artifactId>jasperreports</artifactId>

</dependency>

<groupId>org.codehaus.groovy</groupId>

<artifactId>groovy-all</artifactId>

</dependency>

<groupId>com.lowagie</groupId>

<artifactId>itext</artifactId>

</dependency>

Next, … Read more ›...

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04: JAXB tutorial with XSD & binding.xjb

Step 1: Create a “simple-jaxb” project using Maven

mvn archetype:generate -DarchetypeGroupId=org.apache.maven.archetypes -DarchetypeArtifactId=maven-archetype-quickstart -DgroupId=com.jaxb.tutorial -DartifactId=simple-jaxb -Dversion=0.0.1

1	mvn archetype:generate -DarchetypeGroupId=org.apache.maven.archetypes -DarchetypeArtifactId=maven-archetype-quickstart -DgroupId=com.jaxb.tutorial -DartifactId=simple-jaxb -Dversion=0.0.1

Step 2: Import the project into eclipse with File –> Import –> Existing Maven Projects and choose your folder you just created with pom.xml file “simple-jaxb”. Step 3: select “src/main/resources” … Read more ›...

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04: Kubernetes concepts like kubectl, contexts, kubeconfig & namespaces

This extends Install Kubernetes (i.e. minikube) on Mac.

Step 1: Start the Docker.app on Mac, and then start the minikube cluster from a terminal.


~]$ minikube start

~]$ minikube start

This creates a local Kubernetes cluster. You can confirm if the Minikube cluster is running with:


~]$ minikube status

~]$ minikube status

Kubectl vs Kubernetes Cluster

A Kubernetes cluster can be created on a cloud like AWS,

…

04: Spring boot MVC tutorial with thymeleaf & bean validation

Step 1: Create a “simple-spring-mvc” maven project.


C:\Users\java-_000\projects>mvn archetype:generate -DgroupId=com.mytutorial -DartifactId=simple-spring-mvc -B

C:\Users\java-_000\projects>mvn archetype:generate -DgroupId=com.mytutorial -DartifactId=simple-spring-mvc -B

Step 2: Import the project into eclipse. File > Import -> Existing Maven Projects and select “C:\Users\java-_000\projects\simple-spring-mvc”. Step 3: The pom.xml file should look like:


<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mytutorial</groupId>
    <artifactId>simple-spring-boot</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>simple-spring-boot</name>
    <url>http://maven.apache.org</url>

    <properties>
       <maven.compiler.source>1.8</maven.compiler.source>
       <maven.compiler.target>1.8</maven.compiler.target>
       <java.version>1.8</java.version> 
    </properties>


    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.4.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        
        <dependency>
           <groupId>javax.validation</groupId>
           <artifactId>validation-api</artifactId>
           <version>1.1.0.Final</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

<groupId>com.mytutorial</groupId>

<artifactId>simple-spring-boot</artifactId>

<version>1.0-SNAPSHOT</version>

<name>simple-spring-boot</name>

<url>http://maven.apache.org</url>

<maven.compiler.source>1.8</maven.compiler.source>

<maven.compiler.target>1.8</maven.compiler.target>

<java.version>1.8</java.version>

</properties>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>1.5.4.RELEASE</version>

</parent>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

</dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-thymeleaf</artifactId>

</dependency>

<groupId>javax.validation</groupId>

<artifactId>validation-api</artifactId>

<version>1.1.0.Final</version>

</dependency>

</dependencies>

<build>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-maven-plugin</artifactId>

</plugin>

</plugins>

</build>

</project>

“spring-boot-starter-thymeleaf” … Read more ›...

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04: Spring Cloud Config Client with Git Tutorial

Q. Why do micro services applications require a config server? A. A Config Server is a MicroServices Architecture (aka MSA) feature where all configurable parameters of Microservices are written to & maintained. It is all about externalising properties/resources files out of the project code base to an external service so...

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04. Setting up Eclipse IDE step by step tutorial

Install eclipse

Step 1: Download and install eclipse latest version into the “c:\tools” folder from

http://www.eclipse.org/downloads/

It is an IDE (i.e. Integrated Development Environment). This tutorial downloads Eclipse Neon. Get the EE (Enterprise Edition).

…

Blog Archives

03a: ⏯ Spring Boot Web & Actuator Beginner Video Tutorial

03a: ⏯ Spring MVC with Java Configs instead of XML configs video tutorial

04: Akka tutorial “tell-tell” request – response pattern in Java

04: Docker Tutorial – mount a host directory in a Docker container

04: Drools with rules in an excel spreadsheet – Data validation

04: Install AWS CLI to intercat with AWS services like S3

04: JasperReport generating a PDF file

04: JAXB tutorial with XSD & binding.xjb

04: Kubernetes concepts like kubectl, contexts, kubeconfig & namespaces

04: Spring boot MVC tutorial with thymeleaf & bean validation

04: Spring Cloud Config Client with Git Tutorial

04. Setting up Eclipse IDE step by step tutorial

04. ⏯ Getting started with Eclipse step by step beginner video tutorial

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