This program reads a file, where each line contains a timestamp (in yyyy-mm- ddThh:mm:ss format, i.e. ISO 8601) for the beginning of a half-hour and the number of cars seen that half hour.

An example file can be found here. Clean input is presumed as these files are machine-generated.

The program outputs four files:

• The number of cars seen in total
• A sequence of lines where each line contains a date (in yyyy-mm-dd format) and the number of cars seen on that day (eg. 2016-11-23 289) for all days listed in the input file.
• The top 3 half hours with most cars, in the same format as the input file
• The 1.5 hour period with least cars (i.e. 3 contiguous half hour records)

Example output files for the input example file can be found here.

• Apache Maven 3.8.6
• JDK 19

The tool chain is standard Maven. To build this project run:

mvn install

and install the JAR to the local Maven repository.

Load the pom.xml file into the IDE of choice.

Testing locally can be done with Maven as well:

mvn clean test

The project can be run locally as below:

mvn spring-boot:run

By default, this will run the application over the example input file. The output will be appended to the files in the output directory.

These input and output directory/files are externalised properties and can be changed as required in the application.yml file.

The relevant properties are:

traffic:
  aips:
    file:
      input: io/input/input.txt
      output:
        totalCars: io/output/totalCars.txt
        dailyTrafficCount: io/output/dailyTrafficCount.txt
        topThreeHalfHoursWithMostCars: io/output/topThreeHalfHoursWithMostCars.txt
        oneAndAHalfHourWindowWithLeastCars: io/output/oneAndAHalfHourWindowWithLeastCars.txt

There is no automated deployment pipleline configured for this project at the moment.