Enable stable data exchange between servers and clients written in different languages
It provides a way to exchange data stably even when the server and client are written in different languages. Protocol Buffers is a mechanism for efficiently serializing data, handling complex format conversions on your behalf. This allows you to maintain data consistency during network transmission or file storage.
The Role of the Compiler and Runtime
Using Protocol Buffers requires installing two components. First, you need the Protocol Compiler (protoc), which compiles .proto files. This compiler is written in C++ and generates code for each language. Second, you need a Protocol Buffers runtime for your chosen programming language. This runtime supports the generated code in performing actual data processing.
Installation Paths and Version Management
For most users, using a supported release version is the easiest approach. Building the latest code from the main branch directly can break your build due to source compatibility issues or untested behavior. If you use C++ or need to build from source in your project, it is recommended to pin to a specific commit on a release branch. Caution is required, as instability may exist even between release branches.
Supported Languages and Build Tools
Protocol Buffers supports a variety of languages, including C++, Java, Python, Objective-C, C#, Ruby, Go, PHP, Dart, and JavaScript. For installation instructions for each language, refer to the documentation in the respective source directory. You can use Bazel as a build tool, which supports both Bzlmod and WORKSPACE methods. Bzlmod is available in Bazel 8 and above, where you specify dependencies in the MODULE.bazel file. The WORKSPACE method requires additional load statements for rules_java and rules_python configuration starting from version 30.x.
Considerations for Version Selection
The Protocol Compiler is only provided as pre-built binaries for release versions, so you must build directly from source if you need the latest development version or modifications. C++ users must follow the C++ installation instructions, while users of other languages can download the appropriate zip file for their platform from the GitHub releases page. If you need an older version, you should check the Maven repository. For the support period of language libraries, refer to the version support policy, and participating in the developer community can provide information on future changes.
