aws-lambda-graphql
Version:
Apollo server for AWS Lambda with WebSocket subscriptions support over API Gateway v1 + v2
40 lines • 1.82 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.DynamoDBEventStore = void 0;
const assert_1 = __importDefault(require("assert"));
const aws_sdk_1 = require("aws-sdk");
const ulid_1 = require("ulid");
const helpers_1 = require("./helpers");
const DEFAULT_TTL = 7200;
/**
* DynamoDB event store
*
* This event store stores published events in DynamoDB table
*
* The server needs to expose DynamoDBEventProcessor handler in order to process these events
*/
class DynamoDBEventStore {
constructor({ dynamoDbClient, eventsTable = 'Events', ttl = DEFAULT_TTL, } = {}) {
this.publish = async (event) => {
await this.db
.put({
TableName: this.tableName,
Item: Object.assign(Object.assign({ id: ulid_1.ulid() }, event), (this.ttl === false || this.ttl == null
? {}
: { ttl: helpers_1.computeTTL(this.ttl) })),
})
.promise();
};
assert_1.default.ok(ttl === false || (typeof ttl === 'number' && ttl > 0), 'Please provide ttl as a number greater than 0 or false to turn it off');
assert_1.default.ok(dynamoDbClient == null || typeof dynamoDbClient === 'object', 'Please provide dynamoDbClient as an instance of DynamoDB.DocumentClient');
assert_1.default.ok(typeof eventsTable === 'string', 'Please provide eventsTable as a string');
this.db = dynamoDbClient || new aws_sdk_1.DynamoDB.DocumentClient();
this.tableName = eventsTable;
this.ttl = ttl;
}
}
exports.DynamoDBEventStore = DynamoDBEventStore;
//# sourceMappingURL=DynamoDBEventStore.js.map