[java] [maven] [dropwizard] DropWizard HelloWorld API from scratch

[0] Preparation.

• java jdk 11(set JAVA_HOME path e.g. C:\Program Files\Java\jdk-11)
• maven
• curl
• IntelliJ IDE(optional)

[1] Make project directory

mkdir mydrophello cd mydrophello

[2] Create pom file

notepad pom.xml <project> <modelVersion>4.0.0</modelVersion> <groupId>com.mycompany.helloworld</groupId> <artifactId>helloworld</artifactId> <version>0.0.0</version> </project>

[3] Create source directory

mkdir -p src\main\java\com\mycompany\helloworld mkdir -p src\test\java\com\mycompany\helloworld

[4] Complete the pom file

The full pom file would be as follows:

<?xml version="1.0" encoding="UTF-8"?> <project> <modelVersion>4.0.0</modelVersion> <groupId>com.mycompany.helloworld</groupId> <artifactId>helloworld</artifactId> <version>0.0.0</version> <name>HelloWorld DropWizard</name> <properties> <dropwizard.version>2.0.0</dropwizard.version> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <mainClass>com.mycompany.helloworld.HelloWorldApplication</mainClass> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>io.dropwizard</groupId> <artifactId>dropwizard-core</artifactId> <version>${dropwizard.version}</version> </dependency> <dependency> <groupId>io.dropwizard</groupId> <artifactId>dropwizard-testing</artifactId> <version>${dropwizard.version}</version> </dependency> <dependency> <groupId>org.assertj</groupId> <artifactId>assertj-core</artifactId> <version>3.6.2</version> <scope>test</scope> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-api</artifactId> <version>5.4.2</version> <scope>test</scope> </dependency> <dependency> <groupId>org.junit.jupiter</groupId> <artifactId>junit-jupiter-engine</artifactId> <version>5.4.2</version> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>3.1.1</version> <executions> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <createDependencyReducedPom>true</createDependencyReducedPom> <transformers> <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> <mainClass>com.mycompany.helloworld.HelloWorldApplication</mainClass> </transformer> </transformers> </configuration> </execution> </executions> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <version>3.0.0-M5</version> </plugin> </plugins> </build> </project>

[5] Add Dropwizard files

• Configuration Class File
• Application Class File
• Representation Class File
• Resource Class File
• Health Check Class File (optional)
• Config File

[5.1] Configuration

Location:src\main\java\com\mycompany\helloworld\HelloWorldConfiguration.java

notepad src\main\java\com\mycompany\helloworld\HelloWorldConfiguration.java package com.mycompany.helloworld; import io.dropwizard.Configuration; import com.fasterxml.jackson.annotation.JsonProperty; import javax.validation.constraints.NotEmpty; public class HelloWorldConfiguration extends Configuration { @NotEmpty private String defaultMessage = "Hello World!"; @JsonProperty public String getDefaultMessage() { return defaultMessage; } @JsonProperty public void setDefaultMessage(String message) { this.defaultMessage = message; } }

[5.2] Application

Location:src\main\java\com\mycompany\helloworld\HelloWorldApplication.java

notepad src\main\java\com\mycompany\helloworld\HelloWorldApplication.java package com.mycompany.helloworld; import com.mycompany.helloworld.health.ConfigHealthCheck; import com.mycompany.helloworld.resources.HelloWorldResource; import io.dropwizard.Application; import io.dropwizard.setup.Environment; public class HelloWorldApplication extends Application<HelloWorldConfiguration> { public static void main(String[] args) throws Exception { new HelloWorldApplication().run(args); } @Override public String getName() { return "helloworld"; } @Override public void run(HelloWorldConfiguration configuration, Environment environment) { final HelloWorldResource resource = new HelloWorldResource( configuration.getDefaultMessage() ); final ConfigHealthCheck healthCheck; healthCheck = new ConfigHealthCheck(configuration.getDefaultMessage()); environment.healthChecks().register("defaultMessage", healthCheck); environment.jersey().register(resource); } }

[5.3] Representation

Location:src\main\java\com\mycompany\helloworld\api\HelloWorld.java

mkdir src\main\java\com\mycompany\helloworld\api notepad src\main\java\com\mycompany\helloworld\api\HelloWorld.java package com.mycompany.helloworld.api; import com.fasterxml.jackson.annotation.JsonProperty; public class HelloWorld { private long id; private String content; public HelloWorld(long id, String content) { this.id = id; this.content = content; } @JsonProperty public long getId() { return id; } @JsonProperty public String getContent() { return content; } }

[5.4] Resource

Location:src\main\java\com\mycompany\helloworld\resources\HelloWorldResource.java

mkdir src\main\java\com\mycompany\helloworld\resources notepad src\main\java\com\mycompany\helloworld\resources\HelloWorldResource.java package com.mycompany.helloworld.resources; import com.mycompany.helloworld.api.HelloWorld; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; import java.util.concurrent.atomic.AtomicLong; @Path("/") @Produces(MediaType.APPLICATION_JSON) public class HelloWorldResource { private final String defaultMessage; private final AtomicLong counter; public HelloWorldResource(String defaultMessage) { this.counter = new AtomicLong(); this.defaultMessage = defaultMessage; } @GET public HelloWorld sayHello() { return new HelloWorld(counter.incrementAndGet(), defaultMessage); } }

[5.5] HealthCheck

Location:src\main\java\com\mycompany\helloworld\health\HelloWorldResource.java

mkdir src\main\java\com\mycompany\helloworld\health notepad src\main\java\com\mycompany\helloworld\health\ConfigHealthCheck.java package com.mycompany.helloworld.health; import com.codahale.metrics.health.HealthCheck; public class ConfigHealthCheck extends HealthCheck { private final String defaultMessage; public ConfigHealthCheck(String defaultMessage) { this.defaultMessage = defaultMessage; } @Override protected Result check() throws Exception { if (this.defaultMessage == null) { return Result.unhealthy("Config file doesn't contain key - defaultMessage"); } return Result.healthy(); } }

[5.6] Config

Location:config.yml

notepad config.yml defaultMessage: "Hello World!"

[6] Compile and run

mvn package java -jar target/helloworld-0.0.0.jar server config.yml

REF:https://geekyshacklebolt.wordpress.com/2021/01/06/dropwizard-helloworld-api-from-scratch/
https://github.com/GeekyShacklebolt/dropwizard-helloworld

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[java] [maven] [dropwizard] Running a Dropwizard application in IntelliJ IDEA, Eclipse and NetBeans

 .

Dropwizard is a framework for building RESTful web services in Java. Similar to Spring Boot, Dropwizard applications are packaged into an executable fat JAR file. In addition to executing a Dropwizard application from the command line, you can increase your productivity by configuring your IDE to do that for you. I’m going to be looking at how to run a Dropwizard application in IntelliJ IDEA, Eclipse and NetBeans.

To execute a Dropwizard application, its main method needs to be called with the correct arguments. When you execute a JAR file from the command line, the JVM reads the entry point to your application from the MANIFEST.MF file. It contains key-value pairs and the key we’re interested in is Main-Class. In a Dropwizard application, this is set to your Applicaiton class.

.

https://blog.indrek.io/articles/running-a-dropwizard-application-in-intellij-eclipse-and-netbeans/

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[java] [maven] [dropwizard] Dropwizard with JDBI

[0] Preparation.

• git
• java jdk 11(set JAVA_HOME path e.g. C:\Program Files\Java\jdk-11)
• maven
• curl
• IntelliJ IDE(optional)
• DBeaver(optional)

[1] Clone project

git clone https://github.com/Appdynamics/dropwizard-sample-app.git

[2] Compile Maven project

mvn package

Note: you may get error like "Blocked mirror for repositories". This is due to the use of unsecured http. Open pom.xml file and replace "http://" with "https://"

[3] Run migration (h2 database)

java -jar target/dropwizard-example-0.7.0-SNAPSHOT.jar db migrate example.yml

Note: you may get error like "Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException". This is due to the JAXB APIs considered to be Java EE APIs and therefore are no longer contained on the default classpath in Java SE 9. In Java 11, they are completely removed from the JDK.

Add the following codes to the dependency section of pom.xml file

<!-- API, java.xml.bind module --> <dependency> <groupId>jakarta.xml.bind</groupId> <artifactId>jakarta.xml.bind-api</artifactId> <version>2.3.2</version> </dependency> <!-- Runtime, com.sun.xml.bind module --> <dependency> <groupId>org.glassfish.jaxb</groupId> <artifactId>jaxb-runtime</artifactId> <version>2.3.2</version> </dependency>

[4] Run application

java -jar target/dropwizard-example-0.7.0-SNAPSHOT.jar server example.yml

The application will be opened at port 8082 (refer below console output)

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[java] [maven] [dropwizard] [mysql] Dropwizard on host with MySQL on docker

[0] Preparation.

• git
• java jdk 11(set JAVA_HOME path e.g. C:\Program Files\Java\jdk-11)
• maven
• curl
• IntelliJ IDE(optional)
• DBeaver(optional)

[1] Clone project

git clone https://github.com/joebew42/dropwizard-sample-app.git

[2] Change directory to the project root

cd dropwizard-sample-app

[3] Compile Maven project

mvn package

If you get error invalid target release 11, it could be that your java sdk is not 11. Install JDK 11 first and then set JAVA_HOME path for the JDK 11.

[4] Setup MySQL to run in Docker

docker-compose up -d docker exec -it dropwizard-sample-app-db-1 mysql -u root -proot -e "create database db_notes;"

Note:you may need to check the name of the container by running docker console command first.

docker ps
  

[5] Run migration

mvn package java -jar target/sample-app-1.0-SNAPSHOT.jar db migrate configuration.yml

[6] Run application

mvn package java -jar target/sample-app-1.0-SNAPSHOT.jar server configuration.yml

[7] Test

curl -X POST http://localhost:8080/notes --data "Hello world" curl -X POST http://localhost:8080/notes --data "This is a sample application" curl http://127.0.0.1:8080/notes/ curl http://127.0.0.1:8080/notes/1 curl http://127.0.0.1:8080/notes/2

[8] Check MySQL Database using container terminal

mysql -u root -p db_notes mysql> show tables; mysql> select * from notes;

[9] Check MySQL Database using DBeaver on host

host=localhost port=3306 username=root password=root

REF:

https://github.com/joebew42/dropwizard-sample-app

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[java] [maven] [intellij] How to Write Unit Tests in Java

[0] preparation.

• git
• java jdk 17
• maven
• IntelliJ IDE

[1] Git clone project.

git clone https://github.com/KunalN25/junit-testing-tutorial.git

[2] Change directory to the project root.

cd junit-testing-tutorial

[3] Open project using IntelliJ IDE.

.

.

follow the next steps at https://www.freecodecamp.org/news/java-unit-testing/

REF:

• https://www.freecodecamp.org/news/java-unit-testing/ 
• cache: https://web.archive.org/web/20230403174101/https://www.freecodecamp.org/news/java-unit-testing/
• https://github.com/KunalN25/junit-testing-tutorial/tree/master
• cache: https://web.archive.org/web/20230410174822/https://github.com/KunalN25/junit-testing-tutorial

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[docker] [dockerhub] Create a new Docker Image, Run as Container

Start working in a new project directory.

mkdir demo1 cd demo1

Create demo index.html file.

<!DOCTYPE html> <html> <body style="background-color:lightgoldenrodyellow;"> <h1>Welcome to Stack Simplify</h1> <p>Docker for Beginners Demo</p> <p>Application Version: V1</p> </body> </html>

Create Dockerfile and copy the index.html into the container. (save as .Dockerfile)

FROM nginx COPY index.html /usr/share/nginx/html

Build image.

docker build -f .Dockerfile -t stacksimplify/mynginx_image1:v1 .

Run container from image.

docker run --name mynginx1 -p 80:80 -d stacksimplify/mynginx_image1:v1

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[docker] [dockerhub] Pull Docker Image from Docker Hub and Run it

Pull Image from Docker Hub.

docker pull stacksimplify/dockerintro-springboot-helloworld-rest-api:1.0.0-RELEASE

Run the downloaded Docker Image & Access the Application.

docker run --name app1 -p 80:8080 -d stacksimplify/dockerintro-springboot-helloworld-rest-api:1.0.0-RELEASE

Browse the application at http://localhost/hello.

---

REF: https://www.stacksimplify.com/aws-eks/docker-basics/get-docker-image-from-docker-hub-and-run-/

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[java] [maven] [pom] what is Project Object Model (POM) file?

 

Maven projects, dependencies, builds, artifacts are modeled and described by an XML file called a Project Object Model. 

The POM tells Maven what sort of project it is dealing with and how to modify default behavior to generate output from source. 

In the same way a Java web application has a web.xml that describes, configures, and customizes the application, a Maven project is defined by the presence of a pom.xml. 

It is a descriptive declaration of a project for Maven; it is the figurative “map” that Maven needs to understand what it is looking at when it builds your project.

Reference:

Maven: The Complete Reference - 3.2. The POM

Maven Getting Started Guide

Introduction to Maven

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[java] [maven] [dropwizard] [docker] helloworld dropwizard-0-9-2 docker build and run

Note: the following notes is based on windows powershell environment

[0] Continue from the previous post

 

[1] Create Dockerfile at project root

FROM openjdk:8-jdk COPY hello-world.yml /data/BasicDropwizard/hello-world.yml COPY target/dropwizard-helloworld-1.0-SNAPSHOT.jar /data/BasicDropwizard/dropwizard-helloworld-1.0-SNAPSHOT.jar WORKDIR /data/BasicDropwizard RUN java -version CMD ["java","-jar","dropwizard-helloworld-1.0-SNAPSHOT.jar","server","hello-world.yml"] EXPOSE 8080-8081

[2] Build image

docker build -t dropwizard-basic .

[3] Run container from image

docker run -p 8080:8080 dropwizard-basic

[4] Browse the page.

http://localhost:8080/hello-world

http://localhost:8080/hello-world?name=Successful+Dropwizard+User

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[java] [maven] [dropwizard] helloworld dropwizard-0-9-2 from scratch

This exercise attempt to recreate the dropwizard helloworld app using PowerShell console, notepad, Java and Maven.

Note: the following notes is based on windows powershell environment

[1] make new project directory

mkdir dropwizard-helloworld

[2] change directory to the project directory

cd dropwizard-helloworld

[3] create pom file

<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.ciena.tim</groupId> <artifactId>dropwizard-helloworld</artifactId> <packaging>jar</packaging> <version>1.0-SNAPSHOT</version> <name>dropwizard-helloworld</name> <properties> <dropwizard.version>0.9.2</dropwizard.version> </properties> <dependencies> <dependency> <groupId>io.dropwizard</groupId> <artifactId>dropwizard-core</artifactId> <version>${dropwizard.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>2.3</version> <configuration> <createDependencyReducedPom>true</createDependencyReducedPom> <filters> <filter> <artifact>*:*</artifact> <excludes> <exclude>META-INF/*.SF</exclude> <exclude>META-INF/*.DSA</exclude> <exclude>META-INF/*.RSA</exclude> </excludes> </filter> </filters> </configuration> <executions> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <transformers> <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/> <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> <mainClass>com.example.helloworld.HelloWorldApplication</mainClass> </transformer> </transformers> </configuration> </execution> </executions> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId> <version>2.4</version> <configuration> <archive> <manifest> <addDefaultImplementationEntries>true</addDefaultImplementationEntries> </manifest> </archive> </configuration> </plugin> </plugins> </build> </project>

[4] create source code directory

mkdir src/main

[5] change directory to source code directory

cd src/main

[6] create package directory

mkdir com/example/helloworld

[7] change directory to package directory

cd com/example/helloworld

[8] create java file (HelloWorldCofiguration.java)

notepad HelloWorldConfiguration.java
package com.example.helloworld; import io.dropwizard.Configuration; import com.fasterxml.jackson.annotation.JsonProperty; import org.hibernate.validator.constraints.NotEmpty; public class HelloWorldConfiguration extends Configuration { @NotEmpty private String template; @NotEmpty private String defaultName = "Stranger"; @JsonProperty public String getTemplate() { return template; } @JsonProperty public void setTemplate(String template) { this.template = template; } @JsonProperty public String getDefaultName() { return defaultName; } @JsonProperty public void setDefaultName(String name) { this.defaultName = name; } }

[9] create java file (HelloWorldApplication.java)

notepad HelloWorldApplication.java
package com.example.helloworld; import io.dropwizard.Application; import io.dropwizard.setup.Bootstrap; import io.dropwizard.setup.Environment; import com.example.helloworld.resources.HelloWorldResource; //import com.example.helloworld.health.TemplateHealthCheck; public class HelloWorldApplication extends Application<HelloWorldConfiguration> { public static void main(String[] args) throws Exception { new HelloWorldApplication().run(args); } @Override public String getName() { return "hello-world"; } @Override public void initialize(Bootstrap<HelloWorldConfiguration> bootstrap) { // nothing to do yet } @Override public void run(HelloWorldConfiguration configuration, Environment environment) { final HelloWorldResource resource = new HelloWorldResource( configuration.getTemplate(), configuration.getDefaultName() ); environment.jersey().register(resource); } }

[10] create java file in sub folder (resources/HelloWorldResource.java)

mkdir resources cd resources notepad HelloWorldResource
package com.example.helloworld.resources; import com.example.helloworld.api.Saying; import com.google.common.base.Optional; import com.codahale.metrics.annotation.Timed; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.QueryParam; import javax.ws.rs.core.MediaType; import java.util.concurrent.atomic.AtomicLong; @Path("/hello-world") @Produces(MediaType.APPLICATION_JSON) public class HelloWorldResource { private final String template; private final String defaultName; private final AtomicLong counter; public HelloWorldResource(String template, String defaultName) { this.template = template; this.defaultName = defaultName; this.counter = new AtomicLong(); } @GET @Timed public Saying sayHello(@QueryParam("name") Optional<String> name) { final String value = String.format(template, name.or(defaultName)); return new Saying(counter.incrementAndGet(), value); } }

[11] create java file in another sub folder (api/Saying.java)

mkdir api cd api notepad Saying.java
package com.example.helloworld.api; import com.fasterxml.jackson.annotation.JsonProperty; import org.hibernate.validator.constraints.Length; public class Saying { private long id; @Length(max = 3) private String content; public Saying() { // Jackson deserialization } public Saying(long id, String content) { this.id = id; this.content = content; } @JsonProperty public long getId() { return id; } @JsonProperty public String getContent() { return content; } }

create yml file at project root (hello-world.yml)

template: Hello, %s! defaultName: Stranger

compile package

mvn clean install

run jar file

java -jar target/dropwizard-helloworld-1.0-SNAPSHOT.jar server hello-world.yml

ref: https://github.com/timmackinnon/dropwizard-helloworld/tree/master

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[java] [maven] [dropwizard] helloworld dropwizard-0-9-2

Note: the following notes is based on windows powershell environment

[1] clone github repo

git clone https://github.com/timmackinnon/dropwizard-helloworld.git

[2] change directory into the project directory

cd dropwizard-helloworld

[3] get maven package

mvn package

[4] run jar file

java -jar target/dropwizard-helloworld-1.0-SNAPSHOT.jar server hello-world.yml

REF: 

https://github.com/timmackinnon/dropwizard-helloworld/tree/master

https://softwaredevelopercentral.blogspot.com/2017/07/dropwizard-tutorial.html

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[docker] [minikube] Create a Deployment

 

[0] Create a minikube cluster

Refer: https://technotes.razzi.my/2023/07/docker-minikube-installation.html

[1] Create a deployment

[1].Use the kubectl create command to create a Deployment that manages a Pod. The Pod runs a Container based on the provided Docker image.

# Run a test container image that includes a webserver kubectl create deployment hello-node --image=registry.k8s.io/e2e-test-images/agnhost:2.39 -- /agnhost netexec --http-port=8080

[2].View the Deployment:

kubectl get deployments

[3].View the Pod:

kubectl get pods

[4].View cluster events:

kubectl get events

[5].View the kubectl configuration:

kubectl config view

[2].Create a Service

[1].Expose the Pod to the public internet using the kubectl expose command:

kubectl expose deployment hello-node --type=LoadBalancer --port=8080

[2].View the Service you created:

kubectl get services

[3].Run the following command:

minikube service hello-node

.

.

References: 

https://kubernetes.io/docs/tutorials/hello-minikube/

 

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[docker] [minikube] installation

 

Note:

minikube installation requires hyper-v

however hyper-v may not be available on certain windows version e.g. windows 10 home edition

the following is the alternative approach using docker

[0] Run Docker

Run Docker as administrator

[1] Install minikube via Chocolatey

 minikube start --driver=docker

[2] Open Dashboard

minikube dashboard

http://127.0.0.1:61358/api/v1/namespaces/kubernetes-dashboard/services/http:kubernetes-dashboard:/proxy/#/workloads?namespace=default

Dashboard:

References:

https://kubernetes.io/docs/tasks/tools/

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[java] [maven] [dropwizard] HelloWorld demo REST service

 

[1] Clone DropWizard HelloWorld demo from github

git clone https://github.com/timmackinnon/dropwizard-helloworld.git

[2] Build (maven) application

cd into the folder dropwizard-helloworld

run maven command

mvn package

[3] Run (java) application

java -jar target/dropwizard-helloworld-1.0-SNAPSHOT.jar server hello-world.yml

[4] Test via browser

http://localhost:8080/hello-world

http://localhost:8080/hello-world?name=Successful+Dropwizard+User

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[java] [maven] Create Your First Maven Project

 

[0] Pre-requisite

[0.1] Java 

https://technotes.razzi.my/2023/01/java-jdk-install-java-8-or-java-18-jdk.html

[0.2] Maven

https://technotes.razzi.my/2023/01/java-maven-installation.html

[1] Create New Project

Select menu File/New/Project...

Type the name of the project

Click Create.

Maven will automatically create POM and Java file.

<?xml version="1.0" encoding="UTF-8"?> <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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>mavendemo</artifactId> <version>1.0-SNAPSHOT</version> <properties> <maven.compiler.source>8</maven.compiler.source> <maven.compiler.target>8</maven.compiler.target> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> </project>

package org.example; // Press Shift twice to open the Search Everywhere dialog and type `show whitespaces`, // then press Enter. You can now see whitespace characters in your code. public class Main { public static void main(String[] args) { // Press Alt+Enter with your caret at the highlighted text to see how // IntelliJ IDEA suggests fixing it. System.out.printf("Hello and welcome!"); // Press Shift+F10 or click the green arrow button in the gutter to run the code. for (int i = 1; i <= 5; i++) { // Press Shift+F9 to start debugging your code. We have set one breakpoint // for you, but you can always add more by pressing Ctrl+F8. System.out.println("i = " + i); } } }

[2] Run

select menu Build/Build Project...

Alternatively, right-click main.java file, select menu run

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[laravel] [jetstream] installation

[1] Create Laravel project

Launch a terminal and run the following command:

composer create-project laravel/laravel example-app cd example-app composer require laravel/jetstream

[2] Install JetStream LiveWire Frontend Framework

After the project has been created, you can navigate to the application directory and start Laravel Sail:

php artisan jetstream:install livewire npm install npm run build php artisan migrate

Reference

Laravel Jetstream: https://jetstream.laravel.com/3.x/introduction.html

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[laravel] [sail] [breeze] [bootcamp] chirper project setup

For Windows user:

The following command is linux-based which may not be properly executed under windows environment. It is recommended that Windows Subsystem for Linux (WSL) is installed and used for this exercise. Refer https://learn.microsoft.com/en-us/windows/wsl/install

[1] Get chirper docker project

Launch a terminal and run the following command:

curl -s "https://laravel.build/chirper" | bash

[2] start project

After the project has been created, you can navigate to the application directory and start Laravel Sail:

cd chirper ./vendor/bin/sail up

When developing applications using Sail, you may execute Artisan, NPM, and Composer commands via the Sail CLI instead of invoking them directly:

./vendor/bin/sail php --version ./vendor/bin/sail artisan --version ./vendor/bin/sail composer --version ./vendor/bin/sail npm --version

[3] Installing Laravel Breeze

Open a new terminal in your chirper project directory and install your chosen stack with the given commands:

./vendor/bin/sail composer require laravel/breeze --dev ./vendor/bin/sail artisan breeze:install blade

Breeze will install and configure your front-end dependencies for you, so we just need to start the Vite development server to automatically recompile our CSS and refresh the browser when we make changes to our Blade templates:

./vendor/bin/sail npm run dev

In case vite is injecting wrong url eg using ip address 0.0.0.0 , add the server hrm entries in the vite.config.js file as follows:

import { defineConfig } from 'vite'; import laravel from 'laravel-vite-plugin'; export default defineConfig({ plugins: [ laravel({ input: [ 'resources/css/app.css', 'resources/js/app.js', ], refresh: true, }), ], server: { hmr: { host: 'localhost' /* HERE */ } } });

Reference

Laravel Bootcamp: https://bootcamp.laravel.com/blade/installation

Sail Service: https://laravel.com/docs/10.x/installation#choosing-your-sail-services

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[uipath] [studio] installation [community]

1] Download and install

https://download.uipath.com/UiPathStudioCommunity.msi

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2] Wait while the product installs.

3] Installation done.

4] Run.

(You need to login to the cloud account first.)

(If you click on the Tutorials button, you will be forwarded to https://docs.uipath.com/studio/standalone/2023.4/user-guide/tutorials)

5] Start your journey

6] Create a new process.

7] Quick Tour.

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[aspnet] [4.x] ASP.NET (Razor) Web Pages - Creating WebPagesMovies site [tutorial] [visualstudio] [2017]

1. Create ASP.NET (Razor) Web Site

1.1. Select menu File/New/Project...

1.2. Select Razor v3 ASP.NET Web Site (C#)

Save project as WebPagesMovies 

1.3. Project creation is done.

Visual Studio 2017 created startup folders and files.

1.3. Open Web.config

<?xml version="1.0" encoding="utf-8"?> <configuration> <configSections> <sectionGroup name="dotNetOpenAuth" type="DotNetOpenAuth.Configuration.DotNetOpenAuthSection, DotNetOpenAuth.Core"> <section name="messaging" type="DotNetOpenAuth.Configuration.MessagingElement, DotNetOpenAuth.Core" requirePermission="false" allowLocation="true"/> <section name="reporting" type="DotNetOpenAuth.Configuration.ReportingElement, DotNetOpenAuth.Core" requirePermission="false" allowLocation="true"/> <section name="oauth" type="DotNetOpenAuth.Configuration.OAuthElement, DotNetOpenAuth.OAuth" requirePermission="false" allowLocation="true"/><section name="openid" type="DotNetOpenAuth.Configuration.OpenIdElement, DotNetOpenAuth.OpenId" requirePermission="false" allowLocation="true"/></sectionGroup> </configSections> <system.web> <compilation debug="true" targetFramework="4.6.1"/> <httpRuntime targetFramework="4.6.1"/> </system.web> <connectionStrings> <add name="StarterSite" connectionString="Data Source=|DataDirectory|\StarterSite.sdf" providerName="System.Data.SqlServerCe.4.0"/> </connectionStrings> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="DotNetOpenAuth.Core" publicKeyToken="2780ccd10d57b246"/> <bindingRedirect oldVersion="1.0.0.0-4.3.0.0" newVersion="4.3.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="DotNetOpenAuth.AspNet" publicKeyToken="2780ccd10d57b246"/> <bindingRedirect oldVersion="1.0.0.0-4.3.0.0" newVersion="4.3.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.6.5135.21930.0.0" newVersion="1.6.5135.21930.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0"/> </dependentAssembly> </assemblyBinding> <!-- This prevents the Windows Event Log from frequently logging that HMAC1 is being used (when the other party needs it). --><legacyHMACWarning enabled="0"/><!-- When targeting ASP.NET MVC 3, this assemblyBinding makes MVC 1 and 2 references relink to MVC 3 so libraries such as DotNetOpenAuth that compile against MVC 1 will work with it. <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" /> </dependentAssembly> </assemblyBinding> --></runtime> <system.data> <DbProviderFactories> <remove invariant="System.Data.SqlServerCe.4.0"/> <add name="Microsoft SQL Server Compact Data Provider 4.0" invariant="System.Data.SqlServerCe.4.0" description=".NET Framework Data Provider for Microsoft SQL Server Compact" type="System.Data.SqlServerCe.SqlCeProviderFactory, System.Data.SqlServerCe, Version=4.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91"/> </DbProviderFactories> </system.data><system.net> <defaultProxy enabled="true"/> <settings> <!-- This setting causes .NET to check certificate revocation lists (CRL) before trusting HTTPS certificates. But this setting tends to not be allowed in shared hosting environments. --> <!--<servicePointManager checkCertificateRevocationList="true"/>--> </settings> </system.net><dotNetOpenAuth> <messaging> <untrustedWebRequest> <whitelistHosts> <!-- Uncomment to enable communication with localhost (should generally not activate in production!) --> <!--<add name="localhost" />--> </whitelistHosts> </untrustedWebRequest> </messaging> <!-- Allow DotNetOpenAuth to publish usage statistics to library authors to improve the library. --> <reporting enabled="true"/> <!-- This is an optional configuration section where aspects of dotnetopenauth can be customized. --><!-- For a complete set of configuration options see http://www.dotnetopenauth.net/developers/code-snippets/configuration-options/ --><openid> <relyingParty> <security requireSsl="false"> <!-- Uncomment the trustedProviders tag if your relying party should only accept positive assertions from a closed set of OpenID Providers. --> <!--<trustedProviders rejectAssertionsFromUntrustedProviders="true"> <add endpoint="https://www.google.com/accounts/o8/ud" /> </trustedProviders>--> </security> <behaviors> <!-- The following OPTIONAL behavior allows RPs to use SREG only, but be compatible with OPs that use Attribute Exchange (in various formats). --> <add type="DotNetOpenAuth.OpenId.RelyingParty.Behaviors.AXFetchAsSregTransform, DotNetOpenAuth.OpenId.RelyingParty"/> </behaviors> </relyingParty></openid></dotNetOpenAuth><uri> <!-- The uri section is necessary to turn on .NET 3.5 support for IDN (international domain names), which is necessary for OpenID urls with unicode characters in the domain/host name. It is also required to put the Uri class into RFC 3986 escaping mode, which OpenID and OAuth require. --> <idn enabled="All"/> <iriParsing enabled="true"/> </uri> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:1659;1699;1701"/> <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:41008 /define:_MYTYPE=\"Web\" /optionInfer+"/> </compilers> </system.codedom> </configuration>

The webconfig file contains a connection string to an sdf file

<connectionStrings> <add name="StarterSite" connectionString="Data Source=|DataDirectory|\StarterSite.sdf" providerName="System.Data.SqlServerCe.4.0"/> </connectionStrings>

Download the sdf file:

https://archive.org/download/aspnet_tutorial/WebPagesMovies.sdf

Put the file into the App_Data folder.

(The App_Data folder might have contained a database file StarterSite.pdf. As for now, ignore it.)

2. Add an ASP.NET (Razor) Web Page

In the Project Explorer, right-click the Project Name item, select Add/Add_New_Item ...

Create an empty Razor C# file with the name Movies.cshtml

Put the following codes:

<?xml version="1.0" encoding="utf-8"?> @{ /**/ var db = Database.Open("WebPagesMovies"); var selectedData = db.Query("SELECT * FROM Movies"); var grid = new WebGrid(source: selectedData, rowsPerPage: 3); } <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8" /> <title>Movies</title> <style type="text/css"> .grid { margin: 4px; border-collapse: collapse; width: 600px; } .grid th, .grid td { border: 1px solid #C0C0C0; padding: 5px; } .head { background-color: #E8E8E8; font-weight: bold; color: #FFF; } .alt { background-color: #E8E8E8; color: #000; } </style> </head> <body> <h1>Movies</h1> <div> @grid.GetHtml( tableStyle: "grid", headerStyle: "head", alternatingRowStyle: "alt", columns: grid.Columns( grid.Column("Title"), grid.Column("Genre"), grid.Column("Year") ) ) </div> </body> </html>

Run the project

click the Web Launch button

Wait for the web browser to open the page.

Note

To switch the connection to an sql server,edit as follows:

<connectionStrings> <add name="WebPagesMovies" connectionString="Data Source=|DataDirectory|\WebPagesMovies.sdf" providerName="System.Data.SqlServerCe.4.0"/> <add name="SQLServerConnectionString" connectionString= "server=smacomdb.mssql.somee.com;database=your_db_name;uid=your_uid;Password=your_password;Trusted_Connection=False;" providerName="System.Data.SqlClient" /> </connectionStrings>

(The sql connection string above connects to the server hosted by somee.com)

Replace the connection name in the script file Movies.cshtml i.e replace the string "WebPagesMovies" with "SQLServerConnectionString" as shown below:

@{ /**/ var db = Database.Open("SQLServerConnectionString"); var selectedData = db.Query("SELECT * FROM Movies"); var grid = new WebGrid(source: selectedData, rowsPerPage: 3); }

The followings are the sql scripts to create and populate Movies table:

DROP TABLE Movies; CREATE TABLE Movies ( ID INT PRIMARY KEY IDENTITY (1, 1), Title VARCHAR (50), Genre VARCHAR (50), Year CHAR(4) ); INSERT INTO Movies (Title,Genre,Year) VALUES ("When Harry Met Sally","Romantic Comedy","1989"); . Read More

[aspnet] [error] Unable to connect to the configured development Web server

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error message

Unable to connect to the configured development Web server.

Failed to register URL "http://{ip_addr}:{port}/" for site "{project_name}" application "/". Error description: Access is denied. (0x80070005)

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solution:

Run Visual Studio as Administrator.

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[aspnet] ASP.NET Overview

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ASP.NET is a free web framework for building great websites and web applications using HTML, CSS, and JavaScript. You can also create Web APIs and use real-time technologies like Web Sockets.

ASP.NET Core is an alternative to ASP.NET. See the guidance on how to choose between ASP.NET and ASP.NET Core.

Get started

Install Visual Studio Community edition, a free IDE for ASP.NET on Windows.

Websites and web applications

ASP.NET offers three frameworks for creating web applications: Web Forms, ASP.NET MVC, and ASP.NET Web Pages. All three frameworks are stable and mature, and you can create great web applications with any of them. No matter what framework you choose, you will get all the benefits and features of ASP.NET everywhere.

Each framework targets a different development style. The one you choose depends on a combination of your programming assets (knowledge, skills, and development experience), the type of application you're creating, and the development approach you're comfortable with.

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Below is an overview of each of the frameworks and some ideas for how to choose between them. If you prefer a video introduction, see Making Websites with ASP.NET and What is Web Tools?

Framework	If you have experience in	Development style	Expertise
Web Forms	Win Forms, WPF, .NET	Rapid development using a rich library of controls that encapsulate HTML markup	Mid-Level, Advanced RAD
MVC	Ruby on Rails, .NET	Full control over HTML markup, code and markup separated, and easy to write tests. The best choice for mobile and single-page applications (SPA).	Mid-Level, Advanced
Web Pages	Classic ASP, PHP	HTML markup and your code together in the same file	New, Mid-Level

Web Forms

With ASP.NET Web Forms, you can build dynamic websites using a familiar drag-and-drop, event-driven model. A design surface and hundreds of controls and components let you rapidly build sophisticated, powerful UI-driven sites with data access.

Learn more about Web Forms

MVC

ASP.NET MVC gives you a powerful, patterns-based way to build dynamic websites that enables a clean separation of concerns and that gives you full control over markup for enjoyable, agile development. ASP.NET MVC includes many features that enable fast, TDD-friendly development for creating sophisticated applications that use the latest web standards.

Learn more about MVC

ASP.NET Web Pages

ASP.NET Web Pages and the Razor syntax provide a fast, approachable, and lightweight way to combine server code with HTML to create dynamic web content. Connect to databases, add video, link to social networking sites, and include many more features that help you create beautiful sites that conform to the latest web standards.

Learn more about Web Pages

Notes about Web Forms, MVC, and Web Pages

All three ASP.NET frameworks are based on the .NET Framework and share core functionality of .NET and of ASP.NET. For example, all three frameworks offer a login security model based around membership, and all three share the same facilities for managing requests, handling sessions, and so on that are part of the core ASP.NET functionality.

In addition, the three frameworks are not entirely independent, and choosing one does not preclude using another. Since the frameworks can coexist in the same web application, it's not uncommon to see individual components of applications written using different frameworks. For example, customer-facing portions of an app might be developed in MVC to optimize the markup, while the data access and administrative portions are developed in Web Forms to take advantage of data controls and simple data access.

Web APIs

ASP.NET Web API is a framework that makes it easy to build HTTP services that reach a broad range of clients, including browsers and mobile devices. ASP.NET Web API is an ideal platform for building RESTful applications on the .NET Framework.

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