@bitblit/epsilon/lambda-event-handler/dynamo-epsilon-lambda-event-handler.js

Tiny adapter to simplify building API gateway Lambda APIS

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.DynamoEpsilonLambdaEventHandler = void 0;
const common_1 = require("@bitblit/ratchet/common");
const aws_util_1 = require("../util/aws-util");
const aws_1 = require("@bitblit/ratchet/aws");
const no_handlers_found_error_1 = require("../config/no-handlers-found-error");
class DynamoEpsilonLambdaEventHandler {
    constructor(_epsilon) {
        this._epsilon = _epsilon;
    }
    extractLabel(evt, context) {
        return 'DDBEvt:' + evt.Records[0].eventName + ':' + evt.Records[0].eventSource;
    }
    handlesEvent(evt) {
        return aws_1.LambdaEventDetector.isValidDynamoDBEvent(evt);
    }
    processEvent(evt, context) {
        return __awaiter(this, void 0, void 0, function* () {
            let rval = null;
            if (this._epsilon.config && this._epsilon.config.dynamoDb && evt && evt.Records && evt.Records.length > 0) {
                const finder = evt.Records[0].eventSourceARN;
                const handler = aws_util_1.AwsUtil.findInMap(finder, this._epsilon.config.dynamoDb.handlers);
                if (handler) {
                    rval = yield handler(evt);
                }
                else {
                    common_1.Logger.info('Found no Dynamo handler for : %s', finder);
                    throw new no_handlers_found_error_1.NoHandlersFoundError();
                }
            }
            return rval;
        });
    }
    processUncaughtError(event, context, err) {
        return __awaiter(this, void 0, void 0, function* () {
            common_1.Logger.error('Error slipped out to outer edge (Dynamo).  Logging and rethrowing : %s', err, err);
            throw err;
        });
    }
}
exports.DynamoEpsilonLambdaEventHandler = DynamoEpsilonLambdaEventHandler;
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