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https://github.com/mohamed-taman/springy-store-microservices

Springy Store is a conceptual simple μServices-based project using the latest cutting-edge technologies, to demonstrate how the Store services are created to be a cloud-native and 12-factor app agnostic. Those μServices are developed based on Spring Boot & Cloud framework that implements cloud-native intuitive, design patterns, and best practices.
https://github.com/mohamed-taman/springy-store-microservices

12-factor auth0 cloud-native databases docker docker-compose docker-compose-template elasticsearch java java15 junit5 kubernetes microservices mongodb mysql-database reactive-programming spring-boot spring-cloud spring-cloud-netflix test-microservices

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Springy Store is a conceptual simple μServices-based project using the latest cutting-edge technologies, to demonstrate how the Store services are created to be a cloud-native and 12-factor app agnostic. Those μServices are developed based on Spring Boot & Cloud framework that implements cloud-native intuitive, design patterns, and best practices.

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README 

        
# Springy Store μServices ![GitHub release (latest by date)](https://img.shields.io/github/v/release/mohamed-taman/Springy-Store-Microservices) [![Release Codename](https://img.shields.io/badge/codename-Refresher_3-yellow.svg)](https://github.com/mohamed-taman/Springy-Store-Microservices/releases) | [![Twitter Follow](https://img.shields.io/twitter/follow/_tamanm?label=follow%20me&style=social)](https://twitter.com/_tamanm)



## Important Note: This project's new milestone is to move The whole system to work on Kubernetes, so stay tuned.



## Introduction

- This project is a development of a small set of **Spring Boot** and **Cloud** based Microservices projects that implement cloud-native intuitive, Reactive Programming, Event-driven, Microservices design patterns, and coding best practices.

- The project follows [**CloudNative**](https://www.cncf.io/) recommendations and The [**twelve-factor app**](https://12factor.net/) methodology for building *software-as-a-service apps* to show how μServices should be developed and deployed.

- This project uses cutting edge technologies like Docker, Kubernetes, Elasticsearch Stack for

 logging and monitoring, Java SE 15, MySQL, and MongoDB databases, all components developed with TDD in mind, covering integration & performance testing, and many more.

 - This project is going to be developed as stages, and all such stage steps are documented under

  the project **Springy Store μServices** [wiki page](https://github.com/mohamed-taman/Springy-Store-Microservices/wiki).

---

## Getting started

### System components Structure

Let's explain first the system structure to understand its components:

```

Springy Store μService --> Parent folder. 

|- config --> All system configuration files 

|- docs --> All docs and diagrams. 

|- store-base 

  |- store-build-chassis --> Super Parent POM, contains all build information 

  |- store-cloud-chassis --> Cloud services Parent POM, inherit from build contains all cloud libraries 

  |- store-service-chassis --> Parent POM, inherits from cloud contains all microservices common libraries 

|-store-cloud-infra 

  |- authorization-server --> Authorization server

  |- edge-server --> API Gateway server

  |- eureka-server --> Service discovery server

  |- config-server --> Centralized Configuration server

|-store-common 

  |- store-api --> API Endpoint and services definitions for all microservices 

  |- store-utils --> Common utilities shared between all components 

|-store-services 

  |- product-service --> Product Microservice 

  |- recommendation-service --> Recommendation Microservice 

  |- review-service --> Review Microservice 

  |- store-service --> Store Microservice 

|- docker-compose.yml --> contains all services landscape with RabbitMQ 

|- docker-compose-kafka.yml --> contains all services landscape with more instances working with Kafka with partitions 

|- docker-compose-partitions.yml --> contains all services landscape with more instances working with RabbitMQ with partitions 

|- run-em-all.sh --> Run all microservices in separate mode. 

|- setup.sh --> Install all shared POMs and shared libraries. 

|- stop-em-all.sh --> Stop all services runs in standalone mode. 

|- test-em-all.sh --> This will start all docker compose landscape and test them, then shutdown docker compose containers with test finishes (use switch start stop)

```

Now, as we have learned about different system components, then let's start.



### System Boundary - μServices Landscape



![System Boundary](docs/diagram/app_ms_landscape.png)



### Required software



The following are the initially required software pieces:



1. **Maven**: Apache Maven is a software project management and comprehension tool, it can be downloaded from here https://maven.apache.org/download.cgi



1. **Git**: it can be downloaded and installed from https://git-scm.com/downloads



1. **Java 15 EA**: it can be downloaded and installed from https://jdk.java.net/15/



1. **curl**: this command-line tool for testing HTTP-based APIs can be downloaded and installed from https://curl.haxx.se/download.html



1. **jq**: This command-line JSON processor can be downloaded and installed from https://stedolan.github.io/jq/download/



1. Spring Boot Initializer: This *Initializer* generates *spring* boot project with just what you need to start quickly! Start from here https://start.spring.io/



6. **Docker Desktop**: The fastest way to containerize applications on your desktop, and you can download it from here [https://www.docker.com/products/docker-desktop](https://www.docker.com/products/docker-desktop)



   > For each future stage, I will list the newly required software. 



Follow the installation guide for each software website link and check your software versions from the command line to verify that they are all installed correctly.



## Using an IDE



I recommend that you work with your Java code using an IDE that supports the development of Spring Boot applications such as Spring Tool Suite or IntelliJ IDEA Ultimate Edition. So you can use the Spring Boot Dashboard to run the services, run each microservice test case, and many more.



All that you want to do is just fire up your IDE **->** open or import the parent folder `springy-store-microservices,` and everything will be ready for you.



## Playing With Springy Store Project



### Cloning It



The first thing to do is to open **git bash** command line, and then simply you can clone the project under any of your favorite places as the following:



```bash

> git clone https://github.com/mohamed-taman/Springy-Store-Microservices.git

```



### Build & Test Them In Isolation



To build and run the test cases for each service & shared modules in the project, we need to do the following:



#### First: Build & Install Shared Dependencies



> This done only for the first time or any new changes or versions of shared modules and POMs.



To build and install `store-build-chassis`, `store-utils`, `store-api`, `store-services-chassis`, and `store-cloud-chassis` libraries, from the root folder `springy-store-microservices` run the

 following commands:



```bash

mohamed.taman@DTLNV8 ~/springy-store-microservices 

λ ./setup.sh

```



Now you should expect output like this:



```bash

Installing all Springy store core shared modules & Parent POMs

...............................................................



1- Installing [Parent Build Chassis] module...

Done successfully.



2- Installing [Parent Cloud Chassis] module...

Done successfully.



3- Installing shared [Services Utilities] module...

Done successfully.



4- Installing shared [Services APIs] module...

Done successfully.



5- Installing [Services Parent Chassis] module...

Done successfully.



Woohoo, building & installing all project modules are finished successfully.

The project is ready for the next step. :)

```

#### Second: Build & Test Microservices

Now it is the time to build our **4 microservices** and run each service integration test in

 isolation by running the following commands:



```bash

mohamed.taman@DTLNV8 ~/springy-store-microservices 

λ ./mvnw clean verify -Ddockerfile.skip

```



All build commands and test suite for each microservice should run successfully, and the final output should be like this:



```bash

---------------< com.siriusxi.ms.store:store-aggregator >---------------

[INFO] Building Springy Store Aggregator 1.0-SNAPSHOT                   [13/13]

[INFO] --------------------------------[ pom ]---------------------------------

[INFO]

[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ store-aggregator ---

[INFO] ------------------------------------------------------------------------

[INFO] Reactor Summary for Springy Store Aggregator 1.0-SNAPSHOT:

[INFO]

[INFO] Springy Store Build Chassis ........................ SUCCESS [  0.228 s]

[INFO] Springy Store Cloud Chassis ........................ SUCCESS [  1.257 s]

[INFO] Store APIs ......................................... SUCCESS [  4.279 s]

[INFO] Store Utils ........................................ SUCCESS [  1.809 s]

[INFO] Springy Store Chassis .............................. SUCCESS [  0.857 s]

[INFO] Product Service .................................... SUCCESS [ 13.079 s]

[INFO] Review Service ..................................... SUCCESS [  9.332 s]

[INFO] Recommendation Service ............................. SUCCESS [  8.463 s]

[INFO] Store Service ...................................... SUCCESS [  8.927 s]

[INFO] Eureka Discovery Server ............................ SUCCESS [  6.536 s]

[INFO] Edge Server ........................................ SUCCESS [ 32.108 s]

[INFO] Authorization Server ............................... SUCCESS [  1.616 s]

[INFO] Configuration Server ............................... SUCCESS [  1.216 s]

[INFO] Springy Store Aggregator ........................... SUCCESS [  0.100 s]

[INFO] ------------------------------------------------------------------------

[INFO] BUILD SUCCESS

[INFO] ------------------------------------------------------------------------

[INFO] Total time:  57.663 s

[INFO] Finished at: 2020-05-08T03:38:34+02:00

[INFO] ------------------------------------------------------------------------

```



### Running Them All

#### Using RabbitMQ without the use of partitions

Now it's the time to run all of our reactive Microservices, and it's straightforward just run the following `docker-compose` commands:



```bash

mohamed.taman@DTLNV8 ~/springy-store-microservices 

λ docker-compose -p ssm up -d

```



All the **services**, **databases**, and **messaging service** will run in parallel in detach mode (option `-d`), and command output will print to the console the following:



```bash

Creating network "ssm_default" with the default driver

Creating ssm_eureka_1         ... done

Creating ssm_config-server_1  ... done

Creating ssm_gateway_1        ... done

Creating ssm_auth-server_1    ... done

Creating ssm_mysql_1          ... done

Creating ssm_mongodb_1        ... done

Creating ssm_rabbitmq_1       ... done

Creating ssm_zipkin_1         ... done

Creating ssm_store_1          ... done

Creating ssm_review_1         ... done

Creating ssm_product_1        ... done

Creating ssm_recommendation_1 ... done

```

### Access Store APIs

You can manually test `Store Service` APIs throughout its **Swagger** interface at the following

 URL [https://localhost:8443/swagger-ui.html](https://localhost:8443/swagger-ui.html).

### Access Service Discovery Server (Eureka)

If you would like to access the Eureka service discovery point to this URL [http://localhosts:8443/eureka/web](https://localhost:8443/eureka/web) to see all the services registered inside it. 



Note that it is accessed through API Gateway and is secured. Therefore the browser will ask you for `username:mt` and `password:p,` write them to the dialog, and you will access it. This type of security is a **basic form security**.



The **API Gateway** and **Store Service** both act as a *resource server*. To know more about calling Store API in a secure way you can check the `test-em-all.sh` script on how I have changed the calling of the services using **OAuth2** security.



### Access RabbitMQ

In browser point to this URL [http://localhost:5672/](http://localhost:5672/) `username: guest` and `password: guest`, and you can see all **topics**, **DLQs**, **partitions**, and payload.



1. For running two instances of each service and using _RabbitMQ with two partitions per topic_, use the following `docker-compose` command:

     ```bash

     mohamed.taman@DTLNV8 ~/springy-store-microservices 

     λ docker-compose -p ssm -f docker-compose-partitions.yml up -d 

     ```

 1. To use _Kafka and Zookeeper with two partitions per topic_ run the following command:

     ```bash

      mohamed.taman@DTLNV8 ~/springy-store-microservices 

      λ docker-compose -p ssm -f docker-compose-kafka.yml up -d

     ```

#### Check All Services Health

From Store front Service we can check all the core services health when you have all the

 microservices up and running using Docker Compose,

```bash

mohamed.taman@DTLNV8 ~/springy-store-microservices 

λ curl -k https://localhost:8443/actuator/health -s | jq .components."\"Core Microservices\""

```

This will result in the following response:

```json

{

  "status": "UP",

  "components": {

    "Authorization Server": {

      "status": "UP"

    },

    "Product Service": {

      "status": "UP"

    },

    "Recommendation Service": {

      "status": "UP"

    },

    "Review Service": {

      "status": "UP"

    },

    "Store Service": {

      "status": "UP"

    }

  }

}

```

### Testing Them All

Now it's time to test all the application functionality as one part. To do so just run

 the following automation test script:



```bash

mohamed.taman@DTLNV8 ~/springy-store-microservices 

λ ./test-em-all.sh start

```

> You can use `stop` switch with `start`, that will 

>1. start docker, 

>2. run the tests, 

>3. stop the docker instances.



The result will look like this:



```bash

Starting 'Springy Store μServices' for [Blackbox] testing...



Start Tests: Tue, May 31, 2020 2:09:36 AM

HOST=localhost

PORT=8443

Restarting the test environment...

$ docker-compose -p ssm down --remove-orphans

$ docker-compose -p ssm up -d

Wait for: curl -k https://localhost:8443/actuator/health... , retry #1 , retry #2, {"status":"UP"} DONE, continues...

Test OK (HTTP Code: 200)

...

Test OK (actual value: 1)

Test OK (actual value: 3)

Test OK (actual value: 3)

Test OK (HTTP Code: 404, {"httpStatus":"NOT_FOUND","message":"No product found for productId: 13","path":"/store/api/v1/products/13","time":"2020-04-12@12:34:25.144+0000"})

...

Test OK (actual value: 3)

Test OK (actual value: 0)

Test OK (HTTP Code: 422, {"httpStatus":"UNPROCESSABLE_ENTITY","message":"Invalid productId: -1","path":"/store/api/v1/products/-1","time":"2020-04-12@12:34:26.243+0000"})

Test OK (actual value: "Invalid productId: -1")

Test OK (HTTP Code: 400, {"timestamp":"2020-04-12T12:34:26.471+00:00","path":"/store/api/v1/products/invalidProductId","status":400,"error":"Bad Request","message":"Type mismatch.","requestId":"044dcdf2-13"})

Test OK (actual value: "Type mismatch.")

Test OK (HTTP Code: 401, )

Test OK (HTTP Code: 200)

Test OK (HTTP Code: 403, )

Start Circuit Breaker tests!

Test OK (actual value: CLOSED)

Test OK (HTTP Code: 500, {"timestamp":"2020-05-26T00:09:48.784+00:00","path":"/store/api/v1/products/2","status":500,"error":"Internal Server Error","message":"Did not observe any item or terminal signal within 2000ms in 'onErrorResume' (and no fallback has been configured)","requestId":"4aa9f5e8-119"})

...

Test OK (actual value: Did not observe any item or terminal signal within 2000ms)

Test OK (HTTP Code: 200)

Test OK (actual value: Fallback product2)

Test OK (HTTP Code: 200)

Test OK (actual value: Fallback product2)

Test OK (HTTP Code: 404, {"httpStatus":"NOT_FOUND","message":"Product Id: 14 not found in fallback cache!","path":"/store/api/v1/products/14","timestamp":"2020-05-26@00:09:53.998+0000"})

...

Test OK (actual value: product name C)

Test OK (actual value: CLOSED)

Test OK (actual value: CLOSED_TO_OPEN)

Test OK (actual value: OPEN_TO_HALF_OPEN)

Test OK (actual value: HALF_OPEN_TO_CLOSED)

End, all tests OK: Tue, May 31, 2020 2:10:09 AM

```

### Tracking the services with Zipkin

Now, you can now track Microservices interactions throughout Zipkin UI from the following link:

[http://localhost:9411/zipkin/](http://localhost:9411/zipkin/)

![Zipkin UI](docs/diagram/Zipkin.png)



### Closing The Story



Finally, to close the story, we need to shut down Microservices manually service by service, hahaha just kidding, run the following command to shut them all:



```bash

mohamed.taman@DTLNV8 ~/springy-store-microservices 

λ docker-compose -p ssm down --remove-orphans

```

 And you should see output like the following:



```bash

Stopping ssm_recommendation_1 ... done

Stopping ssm_product_1        ... done

Stopping ssm_review_1         ... done

Stopping ssm_mongodb_1        ... done

Stopping ssm_store_1          ... done

Stopping ssm_auth-server_1    ... done

Stopping ssm_mysql_1          ... done

Stopping ssm_rabbitmq_1       ... done

Stopping ssm_eureka_1         ... done

Stopping ssm_gateway_1        ... done

Stopping ssm_config-server_1  ... done

Stopping ssm_zipkin_1         ... done

Removing ssm_recommendation_1 ... done

Removing ssm_product_1        ... done

Removing ssm_review_1         ... done

Removing ssm_mongodb_1        ... done

Removing ssm_store_1          ... done

Removing ssm_auth-server_1    ... done

Removing ssm_mysql_1          ... done

Removing ssm_rabbitmq_1       ... done

Removing ssm_eureka_1         ... done

Removing ssm_gateway_1        ... done

Removing ssm_config-server_1  ... done

Removing ssm_zipkin_1         ... done

Removing network ssm_default

```

### The End

In the end, I hope you enjoyed the application and find it useful, as I did when I was developing it. 

If you would like to enhance, please: 

- **Open PRs**, 

- Give **feedback**, 

- Add **new suggestions**, and

- Finally, give it a 🌟.



*Happy Coding ...* 🙂



# License

Copyright (C) 2017-2020 Mohamed Taman, Licensed under the MIT License.