The command add_person_kotlin addsĪ new entry to the data file. Our example is a set of command-line applications for managing an address bookĭata file, encoded using protocol buffers. Importantly, the protocol buffer format supports the idea of extending theįormat over time in such a way that the code can still read data encoded with Of the details of reading and writing the protocol buffer as a unit.

Getters and setters for the fields that make up a protocol buffer and takes care From that, the protocol buffer compilerĬreates a class that implements automatic encoding and parsing of the protocolīuffer data with an efficient binary format. Protocol buffers are the flexible, efficient, automated solution to solveĮxactly this problem. Navigating simple fields in a class normally would be. However, XML is notoriously space intensive, andĮncoding/decoding it can impose a huge performance penalty on applications.Īlso, navigating an XML DOM tree is considerably more complicated than This can be a good choice if you want to share data with otherĪpplications/projects. (sort of) human readable and there are binding libraries for lots of This approach can be very attractive since XML is Parsing code, and the parsing imposes a small run-time cost. This is a simple andįlexible approach, although it does require writing one-off encoding and

String – such as encoding 4 ints as “12:3:-23:67”. You can invent an ad-hoc way to encode the data items into a single.rialization has aīut this does not offer the full features of protocol buffers. This does not work very well if you need to shareĭata with applications written in C++ or Python. How do you serialize and retrieve structured data like this? There are a few The address book has a name, an ID, an email address, and a contact phone The example we’re going to use is a very simple “address book” application thatĬan read and write people’s contact details to and from a file. This isn’t a comprehensive guide to using protocol buffers in Kotlin. Use the Kotlin protocol buffer API to write and read messages.By walking through creating a simple example This tutorial provides a basic Kotlin programmer’s introduction to working with This tutorial provides a basic Kotlin programmers introduction to working with protocol buffers.

Kotlin code examples