在路由配置中添加一个自定义的消息变换器（Message Transformer），该变换器在路由模块间传递消息时，将自定义属性添加到传递的消息中。以下是示例代码：

{
  "routes": {
    "route1": "FROM /messages/* INTO BrokeredEndpoint(\"/modules/module1/inputs/input1\")",
    "route2": "FROM /messages/* INTO BrokeredEndpoint(\"/modules/module2/inputs/input1\")"
  },
  "schemaVersion": "1.0",
  "extensions": {
    "route1": {
      "properties": {
        "customProperty1": "value1"
      }
    },
    "route2": {
      "properties": {
        "customProperty2": "value2"
      }
    }
  },
  "stores": {
    "customMsgPropTransformer": {
      "type": "custom",
      "image": "customMsgPropTransformer:latest",
      "env": {
        "CUSTOM_PROP1": "$(extension.route1.properties.customProperty1)",
        "CUSTOM_PROP2": "$(extension.route2.properties.customProperty2)"
      },
      "version": "1.0",
      "status": "running"
    }
  },
  "moduleToModuleCommunication": {
    "customMsgPropRoute": [
      {
        "source": "/modules/module1/outputs/output1",
        "sink": "/modules/module2/inputs/input1",
        "route": {
          "name": "customMsgPropRoute",
          "store": "customMsgPropTransformer"
        }
      }
    ]
  }
}

在此示例中，我们定义了两个路由：route1和route2，它们都包含自定义属性。我们还定义了一个名为customMsgPropTransformer的自定义变换器，该变换器从这些路由的扩展中提取属性并将其添加到传递的消息中。最后，我们将这个消息变换器作为路由定义在moduleToModuleCommunication部分中。