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Move all samples to the root dir

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Signed-off-by: Anca Iordache <anca.iordache@docker.com>
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Anca Iordache 2020-03-16 17:23:59 +01:00
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spring-postgres/README.md Normal file
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## Compose sample application
### Java application with Spring framework and a Postgres database
Project structure:
```
.
├── backend
│   ├── Dockerfile
│   └── ...
├── db
│   └── password.txt
├── docker-compose.yaml
└── README.md
```
[_docker-compose.yaml_](docker-compose.yaml)
```
version: "3.7"
services:
backend:
build: backend
ports:
- 80:8080
db:
image: postgres
...
```
The compose file defines an application with two services `backend` and `db`.
When deploying the application, docker-compose maps port 8080 of the backend service container to port 80 of the host as specified in the file.
Make sure port 80 on the host is not already being in use.
## Deploy with docker-compose
```
$ docker-compose up -d
Creating network "spring-postgres_default" with the default driver
Building backend
Step 1/11 : FROM maven:3.5-jdk-9 AS build
3.5-jdk-9: Pulling from library/maven
...
Successfully tagged spring-postgres_backend:latest
WARNING: Image for service backend was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
Creating spring-postgres_backend_1 ... done
Creating spring-postgres_db_1 ... done
```
## Expected result
Listing containers must show two containers running and the port mapping as below:
```
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
56236f640eaa postgres "docker-entrypoint.s…" 29 seconds ago Up 28 seconds 5432/tcp spring-postgres_db_1
6e69472dc2c0 spring-postgres_backend "java -Djava.securit…" 29 seconds ago Up 28 seconds 0.0.0.0:80->8080/tcp spring-postgres_backend_1
```
After the application starts, navigate to `http://localhost:80` in your web browse or run:
```
$ curl localhost:80
<!DOCTYPE HTML>
<html>
<head>
<title>Getting Started: Serving Web Content</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<p>Hello from Docker!</p>
</body>
```
Stop and remove the containers
```
$ docker-compose down
Stopping spring-postgres_db_1 ... done
Stopping spring-postgres_backend_1 ... done
Removing spring-postgres_db_1 ... done
Removing spring-postgres_backend_1 ... done
Removing network spring-postgres_default
```

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spring-postgres/backend/Dockerfile Executable file
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FROM maven:3.6.3-jdk-11 AS builder
WORKDIR /workdir/server
COPY pom.xml /workdir/server/pom.xml
RUN mvn dependency:go-offline
COPY src /workdir/server/src
RUN mvn install
RUN mkdir -p target/depency
WORKDIR /workdir/server/target/dependency
RUN jar -xf ../*.jar
FROM openjdk:11-jre-slim
EXPOSE 8080
VOLUME /tmp
ARG DEPENDENCY=/workdir/server/target/dependency
COPY --from=builder ${DEPENDENCY}/BOOT-INF/lib /app/lib
COPY --from=builder ${DEPENDENCY}/META-INF /app/META-INF
COPY --from=builder ${DEPENDENCY}/BOOT-INF/classes /app
ENTRYPOINT ["java","-cp","app:app/lib/*","com.company.project.Application"]

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spring-postgres/backend/pom.xml Executable file
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<?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>com.company</groupId>
<artifactId>project</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>New App</name>
<description>My new SpringBoot app</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.5.RELEASE</version>
<relativePath/>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jersey</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

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spring-postgres/backend/src/main/java/com/company/project/Application.java Executable file
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package com.company.project;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@EnableAutoConfiguration
@ComponentScan(basePackages = {"com.company.project"})
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}

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spring-postgres/backend/src/main/java/com/company/project/controllers/HomeController.java Executable file
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package com.company.project.controllers;
import com.company.project.entity.Greeting;
import com.company.project.repository.GreetingRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
@Controller
public class HomeController {
@Autowired
private GreetingRepository repository;
@GetMapping("/")
public String showHome(String name, Model model) {
Greeting dockerGreeting = repository.findById(1).orElse(new Greeting("Not Found 😕"));
model = model.addAttribute("name", dockerGreeting.getName());
return "home";
}
}

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spring-postgres/backend/src/main/java/com/company/project/entity/Greeting.java Normal file
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package com.company.project.entity;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "GREETINGS")
public class Greeting {
@Id
private int id;
private String name;
public Greeting() {
}
public Greeting(String name) {
this.name = name;
}
public Greeting(int id, String name) {
this.id = id;
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Greeting greeting = (Greeting) o;
return name.equals(greeting.name);
}
@Override
public int hashCode() {
return name.hashCode();
}
}

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spring-postgres/backend/src/main/java/com/company/project/repository/GreetingRepository.java Normal file
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package com.company.project.repository;
import com.company.project.entity.Greeting;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
@Repository
public interface GreetingRepository extends CrudRepository<Greeting, Integer> {
}

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spring-postgres/backend/src/main/resources/application.properties Executable file
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spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto=none
spring.jpa.hibernate.show-sql=true
spring.datasource.url=jdbc:postgresql://db:5432/${POSTGRES_DB}
spring.datasource.username=postgres
spring.datasource.password=${POSTGRES_PASSWORD:db-wrz2z}
spring.datasource.initialization-mode=always
spring.datasource.initialize=true
spring.datasource.schema=classpath:/schema.sql
spring.datasource.continue-on-error=true

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spring-postgres/backend/src/main/resources/data.sql Normal file
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INSERT INTO GREETINGS(name) values ('Docker');

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spring-postgres/backend/src/main/resources/schema.sql Normal file
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CREATE TABLE IF NOT EXISTS GREETINGS (
id serial PRIMARY KEY,
name varchar(50) NOT NULL
);

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spring-postgres/backend/src/main/resources/templates/home.ftlh Executable file
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<!DOCTYPE HTML>
<html>
<head>
<title>Getting Started: Serving Web Content</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<p>Hello from ${name}!</p>
</body>

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spring-postgres/db/password.txt Normal file
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db-wrz2z

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spring-postgres/docker-compose.yaml Normal file
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version: "3.7"
services:
backend:
build: backend
ports:
- 80:8080
environment:
POSTGRES_DB: example
networks:
- spring-postges
db:
environment:
POSTGRES_DB: example
POSTGRES_PASSWORD_FILE: /run/secrets/db-password
image: postgres
restart: always
secrets:
- db-password
volumes:
- db-data:/var/lib/postgresql/data
networks:
- spring-postges
volumes:
db-data: {}
secrets:
db-password:
file: db/password.txt
networks:
spring-postges: {}