I am a junior software engineer who've been given a task to take over a old system. This system has several problems, based on my preliminary assessment.
- spaghetti code
- repetitive code
- classes with 10k lines and above
- misuse and over-logging using log4j
- bad database table design
- Missing source control -> I have setup Subversion for this
- Missing documents -> I have no idea of the business rule, except to read the codes
How should I go about it to enhance the quality of the system and resolve such issues? I can think of using static code analysis software to resolve any bad coding practice.
However, it can't detect any bad design issues or problems. How should I go about resolving these issues step by step?