Simple mock server / skeleton

Special thanks for inspiration, idea and support for Maurizio Moscatelli

Developer

• Mykola Bova
• e-mail: bova.mykola@gmail.com
• Skype: mykola_bova
• Blog: http://growth4u.blogspot.com/
• LinkedIn: http://www.linkedin.com/in/mykbova

Why we need it?

• Quite often some API is not ready as soon as you already need it to be able to implement using it functionality.
• You want to develop faster - local mocks could be faster than calls to "real" API.

What do you need from this server?

• Full control of returned mocks.
• Additional custom logic can be implemented in controllers when needed.
• To add new points in a quick and easy way.
• Be able to edit mock files quick and easy as often as you need.
• In fact you dont need to restart servers after editing mock files. Just save your updates - thats it!

Please feel free to

• use onn your projects
• suggest points of improvement

Build stack

• Java 1.8
• Spring Boot
• Spring Rest
• Apache Commons

Build mock server locally

mvn clean install

Run mock server locally

mvn exec:java

This will start mock server locally on port 17000

Design

This is a Spring Boot Rest application.

Classes

mock-server-web\src\main\java\com\bova\services\Application.java
mock-server-web\src\main\resources\application.properties

Application entry point.

@ComponentScan define location of packages where Controllers of application will be located (with REST endpoints)

mock-server-web\src\main\java\com\bova\services\JettyEmbeddedServletContainerFactory.java

Configure error hanlers.

mock-server-web\src\main\resources\repositories\example

Root folder of "example" repository with mock responses.

You are free to add as muck repositories under "repositories" folder, as you need.

mock-server-web\src\main\java\com\bova\services\util\FileUtil.java

A first "core" component of server. Responsible for reading mock files from filesystem. Used in REST controllers.

mock-server-web\src\main\java\com\bova\services\controllers\SimpleErrorController.java

Errors handling.

mock-server-web\src\main\java\com\bova\services\controllers\AbstractController.java

setDefaultContentType

mock-server-web\src\main\java\com\bova\services\controllers\example\ExampleController.java
mock-server-web\src\main\java\com\bova\services\controllers\example\LoginController.java

Second core part of system - REST Controller. Customizabe.

You are free to add as much controllers as you need. But the good idea is to put then in the separate package like "com\bova\services\controllers\example". You are free to add as much packages as much dirrerent APIs you want to mock by your server.

Examples of endpoints

1. Return a json, using parameter in url

json

{
    "f1": 333,
    "f2": "aaaa",
    "f3": "12345",
    "f4": "USD !",
    "f5": "Test",
    "f6": 11.44,
    "f7": false
}

url

http://localhost:17000/example/account/11

path of mock json on filesystem

mock-server-web\src\main\resources\repositories\example\account\11\account

2. Return a json with fixed url

json

[
    {
        "id": 1,
        "description": "type 1"
    },
    {
        "id": 2,
        "description": "type 2"
    }
]

url

http://localhost:17000/example/account/types

path of mock json on filesystem

mock-server-web\src\main\resources\repositories\example\account\types

3. Return a pdf file

url

http://localhost:17000/example/11/reports/2014-10-06

path of mock json on filesystem

mock-server-web\src\main\resources\repositories\example\profiles\report.pdf

4. Return a cvs file

url

http://localhost:17000/example/reports2

path of mock json on filesystem

mock-server-web\src\main\resources\repositories\example\profiles\report.cvs

5. Return a oauth token

json

{
  "access_token": "XisfsJLkT_EY45Jsy6krRN_mXeaHQQSNW9kYwIb8qybsMIYevxXI7CUZcjoyJk-OEt5ST8T5Pw4W6FhQfu3liw",
  "scope": "ALL",
  "token_type": "bearer",
  "expires_in": 299
}

url

http://localhost:17000/example/login/oauth/token?grant_type=client_credentials&client_id=bbrtchc001&client_secret=chcbb001ec4y&scope=ALL

path of mock json on filesystem

mock-server-web\src\main\resources\repositories\example\login\loginTokenResponse

Ideas for improvement

• Add ability to edit mock files online
• Add module for generation mock files based on json schema
• Add module for generating Controllers based on raml specification of rest endpoints
• Provide ability of manage your own mock server (online) as a service