如何为数组的数组编写 avro 模式?
How can I write an avro schema for an array of arrays?
例如,我已经尝试过这个,但它不起作用。我必须创建一个模式,在一个字段中有一个数组数组,但我做不到。
{
"name": "SelfHealingStarter",
"namespace": "SCP.Kafka.AvroSchemas",
"doc": "Message with all the necessary information to run Self Healing process.",
"type": "record",
"fields": [
{
"name": "FiveMinutesAgoMeasurement",
"type": "record",
"doc": "Field with all five minutes ago measurement.",
"fields": [
{
"name": "equipments",
"doc": "List with all equipments measurement.",
"type": {
"type": "array",
"items": {
"type": {
"type": "array",
"items": "string"
},
"default": []
}
},
"default": []
}
]
}
]
}
IDL
protocol Example {
record Foo {
array<array<string>> data = [];
}
}
来自 java -jar ~/workspace/avro-tools-1.8.2.jar idl2schemata example.idl
的 AVSC
{
"type" : "record",
"name" : "Foo",
"fields" : [ {
"name" : "data",
"type" : {
"type" : "array",
"items" : {
"type" : "array",
"items" : "string"
}
},
"default" : [ ]
} ]
}
例如,我已经尝试过这个,但它不起作用。我必须创建一个模式,在一个字段中有一个数组数组,但我做不到。
{
"name": "SelfHealingStarter",
"namespace": "SCP.Kafka.AvroSchemas",
"doc": "Message with all the necessary information to run Self Healing process.",
"type": "record",
"fields": [
{
"name": "FiveMinutesAgoMeasurement",
"type": "record",
"doc": "Field with all five minutes ago measurement.",
"fields": [
{
"name": "equipments",
"doc": "List with all equipments measurement.",
"type": {
"type": "array",
"items": {
"type": {
"type": "array",
"items": "string"
},
"default": []
}
},
"default": []
}
]
}
]
}
IDL
protocol Example {
record Foo {
array<array<string>> data = [];
}
}
来自 java -jar ~/workspace/avro-tools-1.8.2.jar idl2schemata example.idl
{
"type" : "record",
"name" : "Foo",
"fields" : [ {
"name" : "data",
"type" : {
"type" : "array",
"items" : {
"type" : "array",
"items" : "string"
}
},
"default" : [ ]
} ]
}