IT-SDK-Java

Links

• Books: https://www.manning.com/
• Tutorial: https://www.javatpoint.com/java-tutorial
• Tutorial: https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/object-oriented-programming
• Tutorial: https://www.tutorialspoint.com/design_pattern/index.htm
• Tutorial: https://howtodoinjava.com/
• Patterns: https://en.wikipedia.org/wiki/Facade_pattern
• Patterns: https://www.baeldung.com/java-core-structural-patterns
• https://www.jrebel.com/blog/what-is-jrebel
• Hibernate: http://hibernate.org/

Setting

• JRE_HOME=C:\sdk\Java\jre_1.8.0_65
• JAVA_HOME=C:\sdk\Java\jdk_1.8.0_65
• JDK_HOME=C:\sdk\Java\jdk_1.8.0_65

Maven

• ref: https://maven.apache.org/guides/mini/guide-multiple-repositories.html

wget https://www-us.apache.org/dist/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz
sudo tar xzf apache-maven-3.6.3-bin.tar.gz
sudo ln -s apache-maven-3.6.3 maven
sudo vi /etc/profile.d/maven.sh
-------------------------------------
export MAVEN_HOME=/opt/maven
export PATH=${MAVEN_HOME}/bin:${PATH}
-------------------------------------
source /etc/profile.d/maven.sh
mvn -version

Code-Collections

import java.util.concurrent.TimeUnit;
---------------------------------------------
try {
    TimeUnit.SECONDS.sleep(secondsToSleep);
} catch (InterruptedException ie) {
    Thread.currentThread().interrupt();
}
---------------------------------------------

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import io.agroal.api.AgroalDataSource;

public class SettingDatabase{

  AgroalDataSource dataSource;
  String db = "jdbc:db2://localhost:5245/DATABASE:user=db2;password=db2;";
  String sql = "SELECT * FROM users";

  public void init_DriverManager()throws SQLException{
    try{		
      Connection connection = DriverManager.getConnection(db); //Connection connection = AgroalDataSource.getConnection(db);
      PreparedStatement ps = connection.prepareStatement(sql);
      ResultSet rs = ps.executeQuery();
    }
  }	
}

Architekture

Database

• ref: https://quarkus.io/guides/datasource
• ref: https://blogs.oracle.com/developers/configuring-the-oracle-jdbc-drivers-with-quarkus
• ref: https://lankydan.dev/building-a-rest-api-with-quarkus
• JDBC Datasource & Pooling >> Agroal
• Reactive Datasource & Pooling >> Vert.x
• Agroal is a datasource connection pool implementation with integration with transaction, security and other systems.
• Agroal library allows the definition of java.sql.DataSource with connection pooling.
• JPA (Java Persistence API) & Hibernate. JPA is only a specification. Hibernate is an implementation of JPA.

RESTFul

• RESTEasy is an implementation of JAX-RS and it is used to implement RestFul-services.
• Microservices communicating either synchronously via REST or asynchronously using Kafka.

Sprin Boot

• https://www.baeldung.com/spring-boot-start

Quarkus

ref: Roadmap

• https://github.com/quarkusio/quarkus-quickstarts
• https://redhat-developer-demos.github.io/quarkus-tutorial/quarkus-tutorial/index.html
• -------------------------------------------------------
• https://quarkus.io/guides/datasource
• https://quarkus.io/guides/getting-started
• https://quarkus.io/guides/getting-started-reactive
• https://quarkus.io/guides/rest-json
• https://quarkus.io/guides/rest-client
• https://quarkus.io/guides/reactive-sql-clients
• https://quarkus.io/guides/hibernate-orm
• -------------------------------------------------------
• https://quarkus.io/guides/config
• https://quarkus.io/guides/config-reference
• https://quarkus.io/guides/all-config
• https://quarkus.io/guides/maven-tooling
• https://microprofile.io/project/eclipse/microprofile-config
• https://smallrye.io/docs/smallrye-config/index.html
• -------------------------------------------------------
• https://quarkus.io/guides/flyway
• https://quarkus.io/guides/microprofile-graphql
• https://quarkus.io/guides/kubernetes
• https://quarkus.io/quarkus-workshops/super-heroes
• ----------------------------------------------------

ref: Colletions

• https://github.com/quarkusio/quarkus/blob/master/integration-tests/flyway/src/main/java/io/quarkus/it/flyway/FlywayFunctionalityResource.java
• https://dzone.com/articles/building-a-rest-api-with-quarkus
• https://www.programcreek.com/java-api-examples/?code=quarkusio%2Fquarkus-quickstarts%2Fquarkus-quickstarts-master
• https://blogs.oracle.com/developers/configuring-the-oracle-jdbc-drivers-with-quarkus
• https://antoniogoncalves.org/2019/06/07/configuring-a-quarkus-application/
• https://dzone.com/articles/build-a-java-rest-api-with-quarkus
• https://dzone.com/articles/quick-guide-to-microservices-with-quarkus-on-opens
• http://www.mastertheboss.com/soa-cloud/quarkus/getting-started-with-quarkus
• https://www.mailing.dzone.com/click.html?x=a62e&lc=Uhy&mc=h&s=hbIX&u=f&z=oIlBEZc&
• https://jaxenter.de/serverless/quarkus-full-stack-framework-87817

docker pull maven:3.6-jdk-11-slim

Startup

mvn io.quarkus:quarkus-maven-plugin:1.11.0.Final:create \
    -DprojectGroupId=org.acme \
    -DprojectArtifactId=quarkus-init \
    -DclassName="org.acme.quarkus.init.GreetingResource" \
    -Dpath="/hello"
-----------------------------------------------------------
mvn quarkus:dev
mvn compile quarkus:dev
mvn quarkus:list-extensions
mvn quarkus:add-extension -Dextensions="hibernate-validator"
mvn quarkus:add-extension -Dextensions="hibernate-*"