source code traccar server

hi,
which class is responsible for reading the data sent by the GPS tags?
which class is responsible for saving the data in the database?
which class is responsible for intercepting requests from the web client?
how can I communicate the web server?
what are the different servlets responsible for referring customer requests?

for reading the data sent by the GPS tags : package traccar.protocol
for saving the data in the database : find DataManager class
for intercepting requests from the web client: you should find in package traccar.api