protoc-gen-zsharp example

1-test.proto

syntax = "proto3";
import "event_plugin.proto";

package example;

message Foo {
  option (com.zynga.runtime.protobuf.event_sourced) = true;
  int32 foo_id = 1;
  Bar bar = 2;
}

message Bar {
  option (com.zynga.runtime.protobuf.event_sourced) = true;
  int32 bar_id = 1;
  repeated Baz baz = 2;
}

message Baz {
  option (com.zynga.runtime.protobuf.event_sourced) = true;
  int32 baz_id = 1;
}

2-usage.cs

var foo = new Foo();
foo.Bar = new Bar(); // creates set delta event
foo.Bar.Baz.Add(new Baz()); // creates add list delta event
foo.Bar.Baz[0].baz_id = 10; // creates update list delta event

// generate the events for the changes
// This is what you would persist as a journal entry
var events = foo.GenerateEvents();

// apply the events
var fooB = new Foo();
fooB.ApplyEvents(root);

3-data.cs

// Rough example of what the events look like

// foo.Bar = new Bar();
var setEvent = new EventData {
  Path = [2],
  Set = new EventContent {
    ByteData = bar.ToByteString()
  }
}

// foo.Bar.Baz.Add(new Baz());
var listEvent = new EventData {
  Path = [2, 2],
  ListEvent = new ListEvent {
    ListAction = AddList,
    Content = new EventContent {
      ByteData = baz.ToByteString()
    }
  }
}

// foo.Bar.Baz[0].baz_id = 10;
var listEvent = new EventData {
  Path = [2, 2],
  ListEvent = new ListEvent {
    ListAction = UpdateList,
    Index = 0,
    EventData = new EventData {
      Path = [1],
      Set = new EventContent {
        I32 = 10
      }
    }
  }
}