Avro default Symbol

Giriş

Açıklaması şöyle

Avro added the idea of a default symbol in 1.9.0. This is much like a default field value. It provides the reader with a fallback symbol to use if it encounters a symbol that it does not recognize.

Örnek

Şöyle yaparız

{
  "type": "record",
  "name": "MyRecord",
  "fields": [
    {
      "name": "my_field",
      "type": {
        "type": "enum",
        "name": "MyEnum",
        "symbols": [
          "a",
          "b",
          "Unknown"
        ],
        /* 
         * Symbol default - for forwards compatibility - 
         * new in Avro 1.9.0
         */
         "default": "Unknown"  
      },
      /*
       * Field default - for handle backwards compatibility
       */ 
       "default": "Unknown"    
    },
    ...