Log Analyzer

Read, Parse and Flag Events from a Log File

To run the app

1. Clone the git repo

git clone https://github.com/anandankush0908/loganalyzer.git

2. Open the project in an IDE of your choice.

3. Run the main application - com.interview.anandankush0908.loganalyzer.LogAnalyzerApplication.

   1. Create/Update the Run Configuration for the class to provide the program argument.
      
      A sample log file is available in resources/Events.txt

Summary of task

Our custom-build server logs different events to a file named logfile.txt. Every event has 2 entries in the file - one entry when the event was started and another when the event was finished. The entries in the file have no specific order (a finish event could occur before a start event for a given id).

Every line in the file is a JSON object containing the following event data:

• id - the unique event identifier
• state - whether the event was started or finished (can have values STARTED or FINISHED)
• timestamp - the timestamp of the event in milliseconds

Application Server logs also have the following additional attributes:

• type - type of log
• host - hostname

Example contents can be found in Events.txt

The program should:

• Take the path to Events.txt as an input argument
• Parse the contents of Events.txt
• Flag any long events that take longer than 4ms
• Write the found event details to file-based HSQLDB (http://hsqldb.org/) in the working folder
  • The application should create a new table if necessary and store the following values:
    • Event id
    • Event duration
    • Type and Host if applicable
    • Alert (true if the event took longer than 4ms, otherwise false)