IT-SDK-Java
Jump to navigation
Jump to search
Contents
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
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
JDBC is a low level standard for interaction with databases. JPA is higher level standard for the same purpose. JPA allows you to use an object model in your application which can make your life much easier. JDBC allows you to do more things with the Database directly
- 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 ORM (Object-relational mapping). 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
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:1.12.2.Final:create" \
-DprojectGroupId="net.condolco" \
-DprojectArtifactId="quarkus-app-00" \
-DclassName="init.SayHello" \
-Dpath="/hello" \
-Dextensions="resteasy,resteasy-jackson"
-----------------------------------------------------------
mvn quarkus:dev
mvn compile quarkus:dev
mvn quarkus:list-extensions
mvn quarkus:add-extension -Dextensions="hibernate-validator"
mvn quarkus:add-extension -Dextensions="hibernate-*"
-----------------------------------------------------------
## mode: jvm
mvn clean package -DskipTests
java -jar target/tutorial-app-1.0-SNAPSHOT-runner.jar
-----------------------------------------------------------
## mode: native
mvn clean package -DskipTests -Pnative
./target/tutorial-app-1.0-SNAPSHOT-runner
-----------------------------------------------------------
## mode: native contianer
mvn package -DskipTests -Pnative -Dquarkus.native.container-build=true
docker build -f src/main/docker/Dockerfile.native -t example/tutorial-app:1.0-SNAPSHOT .
docker run -it --rm -p 8080:8080 example/tutorial-app:1.0-SNAPSHOT
