Let us depict a scenario where the complete source code of the application was built and then deployed on the test server for testing. It sounds like a robust way to develop software, but this method has many weaknesses. They are,
- Developers have to pause till the complete software is developed for the test results.
- There is a huge possibility that the test results might show lot many bugs. This makes developers be in a complex situation to find the root cause of those bugs since they have to check the entire source code of the application.
- Delivery process of software is slowed down.
- Continuous feedback referring to things like coding or architectural issues, build failures, test condition and file release uploads were missing so that the quality of software can go down.
- The whole process was manual which increments the risk of repeated failure.
It is obvious from the above-stated problems that along with slow software delivery process, the quality of software also went down. This leads to customer unhappiness. So, to overcome such confusion there was a crucial demand for a system to exist where developers can gradually trigger a build and test for each and every change made in the source code. Therefore, in Continuous Integration Jenkins is used. It is the most mature CI tool possible. Now let us see how Continuous Integration with Jenkins crushes the above shortcomings.
Jenkins is a JAVA based continuous build system that runs in Servlet containers like Glassfish or Tomcat. Jenkins tool is heavily used in CI which allows code to build, deployed and tested automatically.
What is CI (Continuous Integration) and Why?
Now a days concept of Continuous Integration is in trend because of its ability to enforce the ideals of Agile Development. It is a technique that allows developers to integrate their code into a shared repository frequently, it may be several times a day. With the Continuous integration, errors could be detected quickly and it is easy to locate them as well. During the process of Continuous Integration, the system is Integrated, Built, Tested, Archived & Deployed at a regular interval of the time.
In the Martin Fowler’s words, “Continuous Integration is a software development practice where members of a team integrate their work frequently. Usually, each person integrates at least daily – leading to multiple integrations per day. Each integration is verified by an automated build (including test) to detect integration errors as quickly as possible”.
There are several CI tools. For Code Repositories, SVN, Mercurial, and Git are there. Jenkins, Bamboo, Cruise Control are the tools for Continuous Build Systems. While JUnit, Cucumber, CppUnit are the Test Frameworks tools and for Artifact Repositories, there are tools like Nexus, Artifactory, Archiva.
For software development, we can hook it up with most of the repositories like SVN, Git, Mercurial, etc. Jenkins has lots of plugins that are available freely. These plugins help to integrate with various software tools for better convenience. One really nice thing about Jenkins is, build configuration files will be on disk which makes massive build cloning and reconfiguring easy.
All other builds are automated, once the project is being configured in Jenkins. It has basic reporting features like status and weather reports (job health).
Advantages of Jenkins
- Jenkins is an open source tool with much support from its community.
- Installation is easier.
- It has more than 1000 plug-in to make the work easier.
- Creating a new Jenkins plugin is very easy if one is not available.
- As Jenkins is a tool written in Java, it can be portable to almost all major platforms.
Most companies who handle continuous integration use their individual cloud-based continuous integration servers built on applications like Jenkins. At HorizonCore our development process is inspired by the Continuous Integration and because of the Jenkins, we are able to achieve our expected result in the proper time frame. If you want to have any further queries then leave a mail for us here.
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