部署应用程序应遵循的方法

Question

We have developed a web based application in java(STRUTS 2.0). Now we want to deploy the application. The client is having one pre UAT environment ,UAT environment and a production environment.

Now when we are deploying for pre-UAT we have created the copy of our project and renamed it to pre-UAT. Similarly we are planning for UAT environment and one we already have for development. So in all we will be having 3 copies of our code.

I want to ask is this approach correct or what is the standard approach followed. This is not our final release as we are first releasing a version and then we will be working on other modules.

So please can anyone guide me for approach to follow for creating this 3 different environments.Thanks in advance

Answer 1

I am not sure what you refer to by "we will be having 3 copies of our code". If you are implying that you actually copied the code-base around multiple times, please stop reading and refer to this:

Why is "copy and paste" of code dangerous?

And once you finish reading, do some research about source control and how to use branching/tagging for concurrent development.

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If you were referring to multi-environment deployment :

Assuming your application is designed correctly (and I'm treading very carefully here), one WAR file (you were mentioning you're using Tomcat, so I am concluding that your application is packaged as a WAR) should be sufficient. The application code should be environment-independent and should read its environment-specific configuration from external resources, such as a database, configuration files or JNDI.

If your application code is environment-independent, then all you need to do is simply deploy the WAR file to each of the environments (the same WAR file), plus the environment-specific set of external artifacts (such as configuration files).