@jucr/nestjs-kafka-events
Version:
Lightweight, tested, straight-forward wrapper around KafkaJS and Confluent's Schema Registry.
57 lines • 2.73 kB
JavaScript
;
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.KafkaAvroDeserializer = void 0;
const common_1 = require("@nestjs/common");
const confluent_schema_registry_1 = require("@kafkajs/confluent-schema-registry");
const loggers_1 = require("../loggers");
let KafkaAvroDeserializer = class KafkaAvroDeserializer {
constructor(kafkaLogger) {
this.kafkaLogger = kafkaLogger;
}
async initialize(configuration, randomSubject) {
this.schemaRegistry = new confluent_schema_registry_1.SchemaRegistry(configuration.api, configuration === null || configuration === void 0 ? void 0 : configuration.options);
if (!randomSubject) {
return;
}
try {
await this.schemaRegistry.getLatestSchemaId(randomSubject);
}
catch (reject) {
this.kafkaLogger.error(`Error while testing schema registry connection (tested subject: ${randomSubject})`);
throw reject;
}
}
async deserialize(message) {
var _a;
try {
const key = await this.schemaRegistry.decode(message.key);
const event = (message === null || message === void 0 ? void 0 : message.value)
? await this.schemaRegistry.decode(message.value)
: message === null || message === void 0 ? void 0 : message.value;
return {
arrival: (_a = new Date(Number(message.timestamp))) !== null && _a !== void 0 ? _a : new Date(),
event,
key,
};
}
catch (reject) {
this.kafkaLogger.error(`Error while deserializing message`, reject);
throw reject;
}
}
};
KafkaAvroDeserializer = __decorate([
common_1.Injectable(),
__metadata("design:paramtypes", [loggers_1.KafkaLogger])
], KafkaAvroDeserializer);
exports.KafkaAvroDeserializer = KafkaAvroDeserializer;
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