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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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samples/sparkjava/README.md
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## Compose sample application
### Spark Java
Project structure:
```
.
├── docker-compose.yaml
├── README.md
└── sparkjava
├── Dockerfile
└── ...
```
[_docker-compose.yaml_](docker-compose.yaml)
```
version: "3.7"
services:
sparkjava:
build: sparkjava
ports:
- 80:8080
```
The compose file defines an application with one service `sparkjava`.
When deploying the application, docker-compose maps port 8080 of the sparkjava 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 "sparkjava_default" with the default driver
Building sparkjava
Step 1/9 : FROM maven:3.5-jdk-8-alpine AS build
3.5-jdk-8-alpine: Pulling from library/maven
...
Successfully tagged sparkjava_sparkjava:latest
WARNING: Image for service sparkjava was built because it did not already exist. To rebuild this image you must use `docker-compose build` or `docker-compose up --build`.
Creating sparkjava_sparkjava_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
5af94cb25394 sparkjava_sparkjava "/bin/sh -c 'java -j…" 20 seconds ago Up 19 seconds 0.0.0.0:80->8080/tcp sparkjava_sparkjava_1
```
After the application starts, navigate to `http://localhost:80` in your web browser or run:
```
$ curl localhost:80
Hello world
```
Stop and remove the containers
```
$ docker-compose down
Stopping sparkjava_sparkjava_1 ... done
Removing sparkjava_sparkjava_1 ... done
Removing network sparkjava_default
```