RESTful-Api-in-Java

POC of REST Api in Java by using jackson which uses JSON as Request and Response Object
A DNS Resolver API which return the IP address of the requestes URL

Requires Tomcat 7

JAR Files:

1) asm-all-3.3.1.jar
2) jersey-bundle-1.14.jar
3) json-simple-1.1.1.jar
4) jsr311-api-1.1.1.jar

There’s no need for defining pom.xml if adding the above jar files.

Maven Dependencies:

<dependencies>
    <dependency>
        <groupId>asm</groupId>
        <artifactId>asm-all</artifactId>
        <version>3.3.1</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-bundle</artifactId>
        <version>1.14</version>
    </dependency>
    <dependency>
        <groupId>com.googlecode.json-simple</groupId>
        <artifactId>json-simple</artifactId>
        <version>1.1</version>
    </dependency>
</dependencies>

Java Files:

1) RESTService

- Creates the REST Service

2) RESTServiceClient

- Calls the REST Service 
- Passes JSON Object as Request

3) DnsResolver

- Demo Functionality class
- Resolves IP Address of the specified URL

API URL:

1) http://localhost:8080/RestAPI/api/dns

- Url for the REST Api functionality
- POST
- Request: JSON Object
- Eg:
 {
    "op":"DNS",
    "url":"www.google.com"
 }
- Response: JSON Object
-Eg:
{
    "ip":"216.58.196.164",
    "url":"www.google.com"
}

2) http://localhost:8080/RestAPI/api/verify

- URL to check whether the API is running
- GET
- Response : Text