Logging

[BraeWebb]

Chalkbox tells you nothing about what it's doing and this is going to need to change ASAP.

We'll use a logging library with varying levels and add command line flags to specify the level.

• SEVERE: level is on by default, occurs if there is an error that might prevent a process from running correctly, for example sample solution not compiling.
• WARNING: logs errors that occur for individual students (the edge cases) for example an IOException when trying to run their assignment or something else weird that would need further investigation.
• INFO: Describes the broad strokes of what chalkbox is doing. For example, printing out that each student is collected and that a process is running.
• FINE: Describes when the individual steps of a chalkbox process occur. For example, may inform users that a submission is being compiled, then JUnit tests running, etc.
• FINER: Describes the output of a submission being run. For example, the tests that pass or fail.
• FINEST: A dump of almost all information that chalkbox has access to that might be useful for debugging. Intended to only be run on some problem submissions.

[wisebaldone]

Dependency Injection should be used to present the logger to each class that needs it.