Build REST CRUD APIs with Quarkus + Hibernate ORM Panache

Hello everyone, today we will learn how to build RESTful CRUD APIs using QUARKUS and Hibernate ORM Panache.
Quarkus is a Java framework designed to run within containers. Fixating on expeditious start-up times and low memory utilization makes it more felicitous to run within container orchestration platforms like Kubernetes.Quarkus supports many industry-standard libraries such as Hibernate, Kubernetes, RESTEasy, Eclipse MicroProfile, and more...

Let's start to build RESTful API with QUARKUS

 Technologies used:

  • Quarkus 2.2.3.Final
  • Hibernate ORM Panache
  • H2 Database
  • Java 11

Project Directory:

Maven Dependencies[pom.xml]:

<?xml version="1.0"?>
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
https://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>com.knf.dev.demo</groupId>
<artifactId>quarku-hibernate-panache-crud</artifactId>
<version>1.0.0-SNAPSHOT</version>
<properties>
<compiler-plugin.version>3.8.1</compiler-plugin.version>
<maven.compiler.parameters>true</maven.compiler.parameters>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<quarkus-plugin.version>2.2.3.Final</quarkus-plugin.version>
<quarkus.platform.artifact-id>quarkus-universe-bom</quarkus.platform.artifact-id>
<quarkus.platform.group-id>io.quarkus</quarkus.platform.group-id>
<quarkus.platform.version>2.2.3.Final</quarkus.platform.version>
<surefire-plugin.version>2.22.1</surefire-plugin.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>${quarkus.platform.group-id}</groupId>
<artifactId>${quarkus.platform.artifact-id}</artifactId>
<version>${quarkus.platform.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-jdbc-h2</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-hibernate-orm-panache</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-resteasy-jsonb</artifactId>
</dependency>
<dependency>
<groupId>io.quarkus</groupId>
<artifactId>quarkus-junit5</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.rest-assured</groupId>
<artifactId>rest-assured</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>${quarkus.platform.group-id}</groupId>
<artifactId>quarkus-maven-plugin</artifactId>
<version>${quarkus.platform.version}</version>
<extensions>true</extensions>
<executions>
<execution>
<goals>
<goal>build</goal>
<goal>generate-code</goal>
<goal>generate-code-tests</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${compiler-plugin.version}</version>
<configuration>
<parameters>${maven.compiler.parameters}</parameters>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>${surefire-plugin.version}</version>
<configuration>
<systemPropertyVariables>
<java.util.logging.manager>org.jboss.logmanager.LogManager</java.util.logging.manager>
<maven.home>${maven.home}</maven.home>
</systemPropertyVariables>
</configuration>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<id>native</id>
<activation>
<property>
<name>native</name>
</property>
</activation>
<build>
<plugins>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>${surefire-plugin.version}</version>
<executions>
<execution>
<goals>
<goal>integration-test</goal>
<goal>verify</goal>
</goals>
<configuration>
<systemPropertyVariables>
<native.image.path>${project.build.directory}/${project.build.finalName}-runner</native.image.path>
<java.util.logging.manager>org.jboss.logmanager.LogManager</java.util.logging.manager>
<maven.home>${maven.home}</maven.home>
</systemPropertyVariables>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<properties>
<quarkus.package.type>native</quarkus.package.type>
</properties>
</profile>
</profiles>
</project>

application.properties:

# datasource configuration
quarkus.datasource.db-kind = h2
quarkus.datasource.username = sa
# quarkus.datasource.password =
quarkus.datasource.jdbc.url = jdbc:h2:mem:test
quarkus.hibernate-orm.database.generation=drop-and-create

Entity class(User.class) - ORM:

package com.knf.dev.demo.entity;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Table(name = "users")
@Entity
public class User {

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String firstName;
private String lastName;
private String emailId;

public Long getId() {
return id;
}

public void setId(Long id) {
this.id = id;
}

public String getFirstName() {
return firstName;
}

public void setFirstName(String firstName) {
this.firstName = firstName;
}

public String getLastName() {
return lastName;
}

public void setLastName(String lastName) {
this.lastName = lastName;
}

public String getEmailId() {
return emailId;
}

public void setEmailId(String emailId) {
this.emailId = emailId;
}

public User(Long id, String firstName, String lastName, String emailId) {
super();
this.id = id;
this.firstName = firstName;
this.lastName = lastName;
this.emailId = emailId;
}

public User() {
super();
}

}

User Repository:

package com.knf.dev.demo.repository;

import javax.enterprise.context.ApplicationScoped;
import com.knf.dev.demo.entity.User;
import io.quarkus.hibernate.orm.panache.PanacheRepository;

@ApplicationScoped
public class UserRepository implements PanacheRepository<User> {

}

User Resource:

package com.knf.dev.demo;

import java.util.List;
import javax.inject.Inject;
import javax.transaction.Transactional;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import com.knf.dev.demo.entity.User;
import com.knf.dev.demo.repository.UserRepository;

@Path("/api/users")
public class UserResource {

@Inject
UserRepository userRepository;

@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getAll() {
List<User> users = userRepository.listAll();
return Response.ok(users).build();
}

@GET
@Path("/{id}")
@Produces(MediaType.APPLICATION_JSON)
public Response getById(@PathParam("id") Long id) {
return userRepository.findByIdOptional(id).
map(user -> Response.ok(user).build())
.orElse(Response.status(404).build());
}

@POST
@Transactional
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public Response create(User user) {
userRepository.persist(user);
if (userRepository.isPersistent(user)) {
return Response.status(200).build();
}
return Response.status(404).build();
}

@DELETE
@Path("/{id}")
@Transactional
public Response deleteById(@PathParam("id") Long id) {
boolean deleted = userRepository.deleteById(id);
return deleted ? Response.noContent().
build() : Response.status(404).build();
}

@PUT
@Path("/{id}")
@Transactional
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public Response update(@PathParam("id") Long id, User user) {
User obj = userRepository.findById(id);
obj.setEmailId(user.getEmailId());
obj.setFirstName(user.getFirstName());
obj.setLastName(user.getLastName());
return Response.status(200).build();

}
}

Verify REST APIs

Build application  jar file: mvn clean package

Start the application: java -jar quarkus-run.jar

1. Add user


2. Get single user


3. Get all users


4. Update user


5. Delete user



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