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- Serializing data on mobile devices with protobuf (C#) | codestalkers
Do you need to be able to represent a full graph, or is a tree enough? Do you need intra-object references? What cross-language compatibility do you need? Human readability required? Do you need something that has been standardized or at least has a full, open specification (not just an open impl)? Do you need a format that requires structural knowledge or one that has a zero-knowledge structure? Are you okay with an IDL that you compile, or do you want native language bindings appropriate to whatever you use? (For example, annotations/macros/etc. ) Do you need a framing structure for use in a streaming context? You can figure out "best" once you know what you need, because they all differ with each other on these aspects. There's probably categories I've missed, too. level 2 I was going to ask about this. Kenton Varda, who wrote protocol buffers version 2, later created Cap'n'Proto () - he generally seems like a pretty bright guy to me, I promote the open source project (sort of a NextCloud on a lot of steroids) he leads any chance I get.
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But using Gradle Plugin for Protobuf, we could have this setup and done automatically in Android Studio. Once it is generated, you can now include the Proto classes and use it as your data model object in your App code. The PROTO File Here I describe a simple PROTO file with a class containing some Strings and an Integer member variables as below. For more information on the proto syntax, refers to google developer doc. syntax = "proto3"; package tutorial; message Person { string name = 1; int32 id = 2; string email = 3; string phone = 4;} This file is then saved in the app/src/main/proto folder of your project. Gradle Environment In your project's root, add the following classpath in the dependencies section. classpath '' In the App's, add the following implementation in the dependencies section. implementation '' Add the below plugin at the top apply plugin: '' To generate the Proto classes from the PROTO File, the below is added to your. protobuf { protoc { artifact = ''} plugins { javalite { artifact = ''}} generateProtoTasks { all() { task -> task.
For simplicity, I just convert it to String and print onto the Text View in my working example code.
1. Download latest protobuf-net version from the protobuf-net project website. 2. Create a new library dll with the model you want to serialize. Remember you need to link the library: protobuf-net-version/Full/unity/ in order to use the protobuf attributes. Let's assume this is our library:
using ProtoBuf;
namespace protolibrary
{
[ProtoContract]
public class ProtoData
[ProtoMember(1)]
public string name;
[ProtoMember(2)]
public float health;}}
Build this library and save it with the name you want. I'm going to use the name and will save the generated dll on the same folder where the protobuf-net precompiler is located to make this tutorial easier to undertand: protobuf-net-version/PreCompile. 3. Create the serialization/deserialization classes with the protobuf-net precompiler. Go to protobuf-net-version/Precompile folder and execute the following command on a console:
-t:MySerializer
This will output with the class name MySerializer. This is the class we're going to use on C# to serialize our data.
It also supports generation from, but that isn't the primary goal (but is of course hugely desirable). It also sports a very different API, geared around common metaphors, rather than common protobuf metaphors. Or to put it another way:
protobuf-csharp-port focuses on protobuf, and adds C# / to the existing protobuf landscape
protobuf-net focuses on C# /, and adds protobuf to the existing C# / landscape
A subtle distinction, maybe - and indeed either would make a worthy serialization API for
As a corollary, if your primary aim is interop between heterogeneous environments that you actively work on in the same team - then maybe protobuf-csharp-port is a better match for you. I'm also a bit... "loose" with protobuf, so I have no (well, minimal) guilt going a little bit beyond the standard spec (while staying inside the protocol definition) to shoehorn in inheritance, full-graphs, etc - which are common in the ecosystem but have no direct map in protobuf. And of course I can look more at tools like WCF (and to a lesser degree: remoting).
protobuf-net is a contract based serializer for code, that happens to write data in the "protocol buffers" serialization format engineered by Google. The API, however, is very different to Google's, and follows typical patterns (it is broadly comparable, in usage, to XmlSerializer, DataContractSerializer, etc). It should work for most languages that write standard types and can use attributes. Release Notes
v3 is here! Change history and pending changes are here. Supported Runtimes
Framework 4. 6. 1+
Standard 2. 0+
Build tools
Build tools to help you use protobuf-net correctly are available via Tools
Runtime Installation
All stable and some pre-release packages are available on NuGet. CI Builds are available via MyGet (feed URL:).
Serializing data on mobile devices with protobuf (C#) | codestalkers
For many years the entirety of Google managed to get by with no maps in their protos, because maps in protos are a nicety, not a core component of wire protocols. In my experience with protobuf I never once used map (and never once missed it) because for many (most? ) scenarios where protobufs are appropriate maps are not. Make a list of messages and organize the messages into a hash by whatever key is appropriate within your program. Needing to send it across the wire like that is usually a sign of bad coupling. I question whether maps improved protobuf or made it worse. level 1 To make it more accessible without losing anything in the process, replace coproduct with variant type and product with record type. Their algebraic relationships are fascinating and useful to know -- but they're not really relevant here. Just adding unnecessary prerequisite knowledge. level 2 `sum type` is also a good alternative to `coproduct`. level 2 FWIW I probably learned the term coproduct (as it applies to programming) before ever seeing "variant".
z = z;
this. w = w;}
public static implicit operator Quaternion(MyQuaternion v)
return new Quaternion(v. z, v. w);}
public static implicit operator MyQuaternion(Quaternion v)
return new MyQuaternion(v. w);}}
I hope this tutorial has been helpful and can help someone. Thank you for reading! 🙂
Serializing data on mobile devices with protobuf (C#)
When it comes to serialize data on Unity, the built-in serializer maybe is a bit slower on mobile devices, specially if you have a lot of data to serialize. To achieve better performance we can serialize our data with protobuf. In this tutorial I'm going to explain how to install and serialize/deserialize data with protobuf on Unity. Protobuf is known as Protocol Buffers, the Google's data interchange format. Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. Google uses Protocol Buffers for almost all of its internal RPC protocols and file formats. The official library does not support C#, fortunately there is a project called protobuf-net to implement protobuf on C#, it's really an amazing project and it's really faster. Is it quick? Yes, a lot! In case of doubt check some performance tests their author published here: protobuf-net performance. Setup
Steps to integrate protobuf-net into our Unity project.
Re performance; protobuf-net is designed to perform that reflection as little as possible, creating efficient data access code after that. In v2, it takes this much further in many ways - using much lower-level meta-programming, and if you want it (entirely optional), pre-generation of a standalone serializer dll - so at runtime the reflection cost is somewhere between minimal (if using runtime meta-programming) to nil (if using pre-generation). Re release; "when it is ready"; life is crazy hectic, but an alpha dll is available for both full and iPhone (this latter will probably work on most of the lighter runtimes, since iPhone is the most restrictive). Ultimately, reality is that (as unsponsored, etc) it is going to lag a bit behind things like work and family - I try to find time when I can, though. I think a more sensible comparison is the goals; protobuf-net is designed to be easily fitted onto your existing DTO or domain model, without significant rework - or for use in a code-first scenario.
- Protocol buffers - Performance of protobuf-net vs. protobuf-csharp-port - Stack Overflow
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