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Support for local Avro schema in CONSUMER/PRODUCER of kafka-file
Fixes jlandersen#114 Signed-off-by: azerr <[email protected]>
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{ | ||
"$schema": "http://json-schema.org/draft-06/schema#", | ||
"title": "Avro Schema Definition", | ||
"description": "Json-Schema definition for Avro AVSC files.", | ||
"definitions": { | ||
"avroSchema": { | ||
"title": "Avro Schema", | ||
"description": "Root Schema", | ||
"oneOf": [ | ||
{ "$ref": "#/definitions/types" } | ||
] | ||
}, | ||
"types": { | ||
"title": "Avro Types", | ||
"description": "Allowed Avro types", | ||
"oneOf": [ | ||
{ "$ref": "#/definitions/primitiveType" }, | ||
{ "$ref": "#/definitions/primitiveTypeWithMetadata" }, | ||
{ "$ref": "#/definitions/customTypeReference" }, | ||
{ "$ref": "#/definitions/avroRecord" }, | ||
{ "$ref": "#/definitions/avroEnum" }, | ||
{ "$ref": "#/definitions/avroArray" }, | ||
{ "$ref": "#/definitions/avroMap" }, | ||
{ "$ref": "#/definitions/avroFixed" }, | ||
{ "$ref": "#/definitions/avroUnion" } | ||
] | ||
}, | ||
"primitiveType": { | ||
"title": "Primitive Type", | ||
"description": "Basic type primitives.", | ||
"type":"string", | ||
"enum": [ | ||
"null", | ||
"boolean", | ||
"int", | ||
"long", | ||
"float", | ||
"double", | ||
"bytes", | ||
"string" | ||
] | ||
}, | ||
"primitiveTypeWithMetadata": { | ||
"title": "Primitive Type With Metadata", | ||
"description": "A primitive type with metadata attached.", | ||
"type": "object", | ||
"properties": { | ||
"type": { "$ref": "#/definitions/primitiveType" } | ||
}, | ||
"required": ["type"] | ||
}, | ||
"customTypeReference": { | ||
"title": "Custom Type", | ||
"description": "Reference to a ComplexType", | ||
"not": { "$ref": "#/definitions/primitiveType" }, | ||
"type": "string", | ||
"pattern": "^[A-Za-z_][A-Za-z0-9_]*(\\.[A-Za-z_][A-Za-z0-9_]*)*$" | ||
}, | ||
"avroUnion": { | ||
"title": "Union", | ||
"description": "A Union of types", | ||
"type": "array", | ||
"items": { "$ref": "#/definitions/avroSchema" }, | ||
"minItems": 1 | ||
}, | ||
"avroField": { | ||
"title": "Field", | ||
"description": "A field within a Record", | ||
"type": "object", | ||
"properties": { | ||
"name": { "$ref": "#/definitions/name" }, | ||
"type": { "$ref": "#/definitions/types" }, | ||
"doc": { "type": "string" }, | ||
"default": { }, | ||
"order": { "enum": ["ascending", "descending", "ignore"] }, | ||
"aliases": { "type": "array", "items": { "$ref": "#/definitions/name" } } | ||
}, | ||
"required": ["name", "type"] | ||
}, | ||
"avroRecord": { | ||
"title": "Record", | ||
"description": "A Record", | ||
"type": "object", | ||
"properties": { | ||
"type": {"type":"string", "enum": ["record"]}, | ||
"name": { "$ref": "#/definitions/name" }, | ||
"namespace": { "$ref": "#/definitions/namespace" }, | ||
"doc": { "type": "string" }, | ||
"aliases": { "type": "array", "items": { "$ref": "#/definitions/name" } }, | ||
"fields": { "type": "array", "items": { "$ref": "#/definitions/avroField" } } | ||
}, | ||
"required": ["type", "name", "fields"] | ||
}, | ||
"avroEnum": { | ||
"title": "Enum", | ||
"description": "An enumeration", | ||
"type": "object", | ||
"properties": { | ||
"type": {"type":"string", "enum": ["enum"]}, | ||
"name": { "$ref": "#/definitions/name" }, | ||
"namespace": { "$ref": "#/definitions/namespace" }, | ||
"doc": { "type": "string" }, | ||
"aliases": { "type": "array", "items": { "$ref": "#/definitions/name" } }, | ||
"symbols": { "type": "array", "items": { "$ref": "#/definitions/name" } } | ||
}, | ||
"required": ["type", "name", "symbols"] | ||
}, | ||
"avroArray": { | ||
"title": "Array", | ||
"description": "An array", | ||
"type": "object", | ||
"properties": { | ||
"type": {"type":"string", "enum": ["array"]}, | ||
"name": { "$ref": "#/definitions/name" }, | ||
"namespace": { "$ref": "#/definitions/namespace" }, | ||
"doc": { "type": "string" }, | ||
"aliases": { "type": "array", "items": { "$ref": "#/definitions/name" } }, | ||
"items": { "$ref": "#/definitions/types" } | ||
}, | ||
"required": ["type", "items"] | ||
}, | ||
"avroMap": { | ||
"title": "Map", | ||
"description": "A map of values", | ||
"type": "object", | ||
"properties": { | ||
"type": {"type":"string", "enum": ["map"]}, | ||
"name": { "$ref": "#/definitions/name" }, | ||
"namespace": { "$ref": "#/definitions/namespace" }, | ||
"doc": { "type": "string" }, | ||
"aliases": { "type": "array", "items": { "$ref": "#/definitions/name" } }, | ||
"values": { "$ref": "#/definitions/types" } | ||
}, | ||
"required": ["type", "values"] | ||
}, | ||
"avroFixed": { | ||
"title": "Fixed", | ||
"description": "A fixed sized array of bytes", | ||
"type": "object", | ||
"properties": { | ||
"type": {"type":"string", "enum": ["fixed"]}, | ||
"name": { "$ref": "#/definitions/name" }, | ||
"namespace": { "$ref": "#/definitions/namespace" }, | ||
"doc": { "type": "string" }, | ||
"aliases": { "type": "array", "items": { "$ref": "#/definitions/name" } }, | ||
"size": {"type":"number"} | ||
}, | ||
"required": ["type", "name", "size"] | ||
}, | ||
"name": { | ||
"type": "string", | ||
"pattern": "^[A-Za-z_][A-Za-z0-9_]*$" | ||
}, | ||
"namespace": { | ||
"type": "string", | ||
"pattern": "^([A-Za-z_][A-Za-z0-9_]*(\\.[A-Za-z_][A-Za-z0-9_]*)*)*$" | ||
} | ||
}, | ||
"oneOf": [ | ||
{ "$ref": "#/definitions/avroSchema" } | ||
] | ||
} |
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import * as vscode from "vscode"; | ||
import { registerAvroSerialization } from "./serialization"; | ||
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export function registerAvroFileSupport(context: vscode.ExtensionContext) { | ||
// register avro serializer/deserializer from a local *.avro file | ||
registerAvroSerialization(); | ||
} |
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import * as avro from "avsc"; | ||
import { Deserializer, registerDeserializer, registerSerializer, SerializationException, SerializationSetting, Serializer } from "../client/serialization"; | ||
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export function registerAvroSerialization() { | ||
registerSerializer("avro", new AvroSerializer()); | ||
registerDeserializer("avro", new AvroDeserializer()); | ||
} | ||
class AvroSerializer implements Serializer { | ||
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serialize(value: string, settings: SerializationSetting[]): Buffer | string | null { | ||
if (!settings) { | ||
throw new SerializationException("The avro file path is required"); | ||
} | ||
const type = avro.Type.forSchema({ | ||
type: 'record', | ||
fields: [ | ||
{ name: 'kind', type: { type: 'enum', symbols: ['CAT', 'DOG'] } }, | ||
{ name: 'name', type: 'string' } | ||
] | ||
} as avro.Schema); | ||
const data = JSON.parse(value); | ||
return type.toBuffer(data); | ||
} | ||
} | ||
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class AvroDeserializer implements Deserializer { | ||
|
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deserialize(data: Buffer | null, settings?: SerializationSetting[]): any { | ||
if (data === null) { | ||
return null; | ||
} | ||
if (!settings) { | ||
throw new SerializationException("The avro file path is required"); | ||
} | ||
const type = avro.Type.forSchema({ | ||
type: 'record', | ||
fields: [ | ||
{ name: 'kind', type: { type: 'enum', symbols: ['CAT', 'DOG'] } }, | ||
{ name: 'name', type: 'string' } | ||
] | ||
} as avro.Schema); | ||
return type.fromBuffer(data); | ||
} | ||
} |
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