Protocol buffers, an introduction

Table of Contents


Protocol buffers are Google’s language-neutral, platform-neutral, extensible mechanism for serializing structured data. Some advantages are:

  • Cross platform and language independent
  • Backwards-compatible and future-proof
  • Focused. Proto schemas describe your data models.

Protobuf was invented by Google, and is a lot smaller and faster than other alternatives like XML.


message Person {
  required string name = 1;
  required int32 id = 2;
  optional string email = 3;

While using with Java, this can be used like this:

Person john = Person.newBuilder()
    .setName("John Doe")
    .setEmail("[email protected]")
output = new FileOutputStream(args[0]);

Seems easy, right?


  • The Builder notation can be used.
  • Less boilerplate code.
  • Easy to understand


  • Unreadable data
  • When the data model is not suited for a schema.
  • When data from service is directly consumed by the browser, this can be a problem.


Well, this looks interesting and I would like to know more about it. For now, I won’t be diving deeper, but will definitely consider using protobufs for my next project.

Man Parvesh Singh Randhawa
Man Parvesh Singh Randhawa
Software Engineer

My interests include distributed computing, information security and Software Engineering.