Log Summary

Log Summary is a simple ruby application that can parse a basic log file format:

/homepage 192.168.0.1
/about/1 192.168.0.1
/videos/cats 127.0.0.1
/homepage 192.168.0.1

Usage

It comes with a very simple CLI that can be used as follows:

$ bin/parser.rb /path/to/log_file.log
VIEWS
  /homepage    2 views
  /about       1 views
  /viedos/cats 1 views
UNIQUE VIEWS
  /homepage    1 unique views
  /about       1 unique views
  /viedos/cats 1 unique views

Development

To run the test suite you can use:

$ bin/rspec -c

Architecture

• Use dependency injection to support patterns such as strategy pattern. This could then be used to parse more complex log lines without changing much code. The parser could even be switched out based on command line arguments.
• Avoid hashes in favour of custom objects. Ruby engineers have a tendency to favor hash driven development but it makes code inflexible IMO.
• Keep logic outside of executables and in classes instead. This makes even the CLI output testable.

Recommendations

Refactor the Aggregator to better support multiple aggregations. Potentially something like:

# pseudo code
result_builder = ResultBuilder.new
# aggregation classes have a basic interface
result_builder.add_aggregator(UniqueViewsAggregator.new)
result_builder.add_aggregator(ViewCountAggregator.new)
result_builder << LogLine.new('/path', 'ip')
result_builder.to_s # => output results?