除了模式中预定义的原始类型和复杂类型之外，如何让 avro 代码生成器使用不同的类型？

Question

我有一个简单的 avro 架构，如下所示：

{
        "type": "record",
        "name": "transaction",
        "namespace": "com.mycompany",
        "doc": "Transaction records",
        "fields": [

        {
                "name": "version",
                "type": "int",
                "default": 1,
                "doc": "version the class"
        },
        {
                "name": "eventType",
                "type": "string",
                "default": "saleTransaction",
                "doc": "event type"
        },
        {
                "name": "writeTimestamp",
                "type": "org.joda.time.DateTime",
                "doc": "Timestamp when this event was written to the stream"
        },
        {
                "name": "originatingClient",
                "type": "string",
                "doc": "identifier of the originating client"
        }
}

当我使用 avro-maven-plugin 编译它时，出现以下错误：

ERROR] Failed to execute goal

Execution transaction-schemas of goal org.apache.avro:avro-maven-plugin:1.8.0:schema failed: "org.joda.time.DateTime" is not a defined name. The type of the "writeTimestamp" field must be a defined name or a {"type": ...} expression. -> [Help 1]

如何让它工作？

Answer 1

Avro 目前不支持日期，您必须将时间存储为 long。并且不支持自定义类型，因为这意味着支持该类型的 avro 序列化和反序列化。

除了模式中预定义的原始类型和复杂类型之外，如何让 avro 代码生成器使用不同的类型？

How do I get the avro code generator to use a different type, other than the predefined primitive and complex types in schema?

avro