Writing Java client for REST API

In this recipe, we will quickly see how we can create a Java client to communicate with JIRA using the REST APIs.

Getting ready

Create a simple Java project. You can use the maven archetype, maven-archetype-quickstart, to create the project or use your favorite IDE to generate one.

The following is the non-interactive command for generating a simple project using maven-archetype-quickstart:

    mvnarchetype:generate -DgroupId=com.jtricks
    -DartifactId=rest-client -DarchetypeArtifactId=maven-archetype-quickstart 
    -DinteractiveMode=false

You can easily generate an Eclipse project using the following command:

    mvn eclipse:eclipse

How to do it...

In order to connect to JIRA using REST APIs, Atlassian has developed the JRJC library. It provides a thin layer of abstraction on top of the REST API and related HTTP(S) communication, and gives a domain object model to represent the JIRA entities, such as issues, priorities, resolutions, statuses, users, and so...