@bitblit/epsilon
Version:
Tiny adapter to simplify building API gateway Lambda APIS
328 lines • 18 kB
JavaScript
"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());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var logger_1 = require("@bitblit/ratchet/dist/common/logger");
var web_handler_1 = require("./http/web-handler");
var lambda_event_detector_1 = require("@bitblit/ratchet/dist/aws/lambda-event-detector");
var event_util_1 = require("./http/event-util");
var cron_util_1 = require("./batch/cron/cron-util");
var salt_mine_queue_util_1 = require("@bitblit/saltmine/dist/salt-mine-queue-util");
var error_ratchet_1 = require("@bitblit/ratchet/dist/common/error-ratchet");
/**
* This class functions as the adapter from a default Lambda function to the handlers exposed via Epsilon
*/
var EpsilonGlobalHandler = /** @class */ (function () {
function EpsilonGlobalHandler(config) {
this.config = config;
this.validateGlobalConfig(config);
if (!config.disabled) {
config.disabled = {};
}
}
EpsilonGlobalHandler.prototype.validateGlobalConfig = function (config) {
if (!config) {
error_ratchet_1.ErrorRatchet.throwFormattedErr('Config may not be null');
}
if (!!config.cron && !config.cron.timezone) {
error_ratchet_1.ErrorRatchet.throwFormattedErr('Cron is defined, but timezone is not set');
}
};
EpsilonGlobalHandler.prototype.fetchSaltMineHandler = function () {
return this.config.saltMine && !this.config.disabled.saltMine ? this.config.saltMine : null;
};
EpsilonGlobalHandler.prototype.fetchWebHandler = function () {
if (!this.cacheWebHandler) {
if (this.config.apiGateway && !this.config.disabled.apiGateway) {
this.cacheWebHandler = new web_handler_1.WebHandler(this.config.apiGateway);
}
}
return this.cacheWebHandler;
};
EpsilonGlobalHandler.prototype.lambdaHandler = function (event, context) {
return __awaiter(this, void 0, void 0, function () {
var rval, logLevel, wh, sm, err_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
rval = null;
_a.label = 1;
case 1:
_a.trys.push([1, 18, , 19]);
if (!this.config) {
logger_1.Logger.error('Config not found, abandoning');
return [2 /*return*/, false];
}
logLevel = event_util_1.EventUtil.calcLogLevelViaEventOrEnvParam(logger_1.Logger.getLevel(), event, this.config.loggerConfig);
logger_1.Logger.setLevelByName(logLevel);
if (this.config.loggerConfig &&
this.config.loggerConfig.queryParamTracePrefixName &&
event.queryStringParameters &&
event.queryStringParameters[this.config.loggerConfig.queryParamTracePrefixName]) {
logger_1.Logger.info('Setting trace prefix to %s', event.queryStringParameters[this.config.loggerConfig.queryParamTracePrefixName]);
logger_1.Logger.setTracePrefix(event.queryStringParameters[this.config.loggerConfig.queryParamTracePrefixName]);
}
if (!lambda_event_detector_1.LambdaEventDetector.isValidApiGatewayEvent(event)) return [3 /*break*/, 5];
logger_1.Logger.debug('Epsilon: APIG: %j', event);
wh = this.fetchWebHandler();
if (!wh) return [3 /*break*/, 3];
return [4 /*yield*/, wh.lambdaHandler(event, context)];
case 2:
rval = _a.sent();
return [3 /*break*/, 4];
case 3:
logger_1.Logger.warn('API Gateway event, but no handler or disabled');
_a.label = 4;
case 4: return [3 /*break*/, 17];
case 5:
if (!lambda_event_detector_1.LambdaEventDetector.isValidSnsEvent(event)) return [3 /*break*/, 10];
logger_1.Logger.debug('Epsilon: SNS: %j', event);
sm = this.fetchSaltMineHandler();
if (!(sm && sm.isSaltMineSNSEvent(event))) return [3 /*break*/, 7];
return [4 /*yield*/, sm.processSaltMineSNSEvent(event, context)];
case 6:
rval = _a.sent();
return [3 /*break*/, 9];
case 7: return [4 /*yield*/, this.processSnsEvent(event)];
case 8:
rval = _a.sent();
_a.label = 9;
case 9: return [3 /*break*/, 17];
case 10:
if (!lambda_event_detector_1.LambdaEventDetector.isValidS3Event(event)) return [3 /*break*/, 12];
logger_1.Logger.debug('Epsilon: S3: %j', event);
return [4 /*yield*/, this.processS3Event(event)];
case 11:
rval = _a.sent();
return [3 /*break*/, 17];
case 12:
if (!lambda_event_detector_1.LambdaEventDetector.isValidCronEvent(event)) return [3 /*break*/, 14];
logger_1.Logger.debug('Epsilon: CRON: %j', event);
return [4 /*yield*/, this.processCronEvent(event)];
case 13:
rval = _a.sent();
return [3 /*break*/, 17];
case 14:
if (!lambda_event_detector_1.LambdaEventDetector.isValidDynamoDBEvent(event)) return [3 /*break*/, 16];
logger_1.Logger.debug('Epsilon: DDB: %j', event);
return [4 /*yield*/, this.processDynamoDbEvent(event)];
case 15:
rval = _a.sent();
return [3 /*break*/, 17];
case 16:
logger_1.Logger.warn('Unrecognized event, returning false : %j', event);
_a.label = 17;
case 17: return [2 /*return*/, rval];
case 18:
err_1 = _a.sent();
logger_1.Logger.error('Error slipped out to outer edge. Logging and returning false : %s', err_1, err_1);
return [2 /*return*/, false];
case 19: return [2 /*return*/];
}
});
});
};
EpsilonGlobalHandler.prototype.processSnsEvent = function (evt) {
return __awaiter(this, void 0, void 0, function () {
var rval, finder, handler;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
rval = null;
if (!(this.config && this.config.sns && !this.config.disabled.sns && evt && evt.Records.length > 0)) return [3 /*break*/, 3];
finder = evt.Records[0].Sns.TopicArn;
handler = this.findInMap(finder, this.config.sns.handlers);
if (!handler) return [3 /*break*/, 2];
return [4 /*yield*/, handler(evt)];
case 1:
rval = _a.sent();
return [3 /*break*/, 3];
case 2:
logger_1.Logger.info('Found no SNS handler for : %s', finder);
_a.label = 3;
case 3: return [2 /*return*/, rval];
}
});
});
};
EpsilonGlobalHandler.prototype.processS3Event = function (evt) {
return __awaiter(this, void 0, void 0, function () {
var rval, finder, isRemoveEvent, handler, handler;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
rval = null;
if (!(this.config && this.config.s3 && !this.config.disabled.s3 && evt && evt.Records.length > 0)) return [3 /*break*/, 7];
finder = evt.Records[0].s3.bucket.name + '/' + evt.Records[0].s3.object.key;
isRemoveEvent = evt.Records[0].eventName && evt.Records[0].eventName.startsWith('ObjectRemoved');
if (!isRemoveEvent) return [3 /*break*/, 4];
handler = this.findInMap(finder, this.config.s3.removeHandlers);
if (!handler) return [3 /*break*/, 2];
return [4 /*yield*/, handler(evt)];
case 1:
rval = _a.sent();
return [3 /*break*/, 3];
case 2:
logger_1.Logger.info('Found no s3 create handler for : %s', finder);
_a.label = 3;
case 3: return [3 /*break*/, 7];
case 4:
handler = this.findInMap(finder, this.config.s3.createHandlers);
if (!handler) return [3 /*break*/, 6];
return [4 /*yield*/, handler(evt)];
case 5:
rval = _a.sent();
return [3 /*break*/, 7];
case 6:
logger_1.Logger.info('Found no s3 remove handler for : %s', finder);
_a.label = 7;
case 7: return [2 /*return*/, rval];
}
});
});
};
EpsilonGlobalHandler.prototype.processCronEvent = function (evt) {
return __awaiter(this, void 0, void 0, function () {
var rval, saltMineConfig, toEnqueue, i, smCronEntry, saltMineEntry, i, directEntry;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
rval = null;
if (!(this.config && this.config.cron && !this.config.disabled.cron && evt && evt.resources[0])) return [3 /*break*/, 13];
if (!!!this.config.cron.saltMineEntries) return [3 /*break*/, 9];
if (!!!this.config.saltMine) return [3 /*break*/, 8];
saltMineConfig = this.config.saltMine.getConfig();
toEnqueue = [];
i = 0;
_a.label = 1;
case 1:
if (!(i < this.config.cron.saltMineEntries.length)) return [3 /*break*/, 5];
smCronEntry = this.config.cron.saltMineEntries[i];
if (!cron_util_1.CronUtil.eventMatchesEntry(evt, smCronEntry, this.config.cron)) return [3 /*break*/, 4];
logger_1.Logger.info('Firing Salt-Mine cron : %s', cron_util_1.CronUtil.cronEntryName(smCronEntry));
saltMineEntry = {
type: smCronEntry.saltMineTaskType,
created: new Date().getTime(),
data: {},
metadata: {
cronDelegate: true,
cronSourceEvent: evt
}
};
if (!smCronEntry.fireImmediate) return [3 /*break*/, 3];
return [4 /*yield*/, salt_mine_queue_util_1.SaltMineQueueUtil.fireImmediateProcessRequest(saltMineConfig, saltMineEntry)];
case 2:
_a.sent();
return [3 /*break*/, 4];
case 3:
toEnqueue.push(saltMineEntry);
_a.label = 4;
case 4:
i++;
return [3 /*break*/, 1];
case 5:
if (!(toEnqueue.length > 0)) return [3 /*break*/, 7];
return [4 /*yield*/, salt_mine_queue_util_1.SaltMineQueueUtil.addEntriesToQueue(saltMineConfig, toEnqueue, true)];
case 6:
_a.sent();
_a.label = 7;
case 7: return [3 /*break*/, 9];
case 8:
logger_1.Logger.warn('Cron defines salt mine tasks, but no salt mine is set in config');
_a.label = 9;
case 9:
if (!!!this.config.cron.directEntries) return [3 /*break*/, 13];
i = 0;
_a.label = 10;
case 10:
if (!(i < this.config.cron.directEntries.length)) return [3 /*break*/, 13];
directEntry = this.config.cron.directEntries[i];
if (!cron_util_1.CronUtil.eventMatchesEntry(evt, directEntry, this.config.cron)) return [3 /*break*/, 12];
logger_1.Logger.info('Firing direct cron : %s', cron_util_1.CronUtil.cronEntryName(directEntry, i));
return [4 /*yield*/, directEntry.directHandler(evt)];
case 11:
_a.sent();
_a.label = 12;
case 12:
i++;
return [3 /*break*/, 10];
case 13: return [2 /*return*/, rval];
}
});
});
};
EpsilonGlobalHandler.prototype.processDynamoDbEvent = function (evt) {
return __awaiter(this, void 0, void 0, function () {
var rval, finder, handler;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
rval = null;
if (!(this.config && this.config.dynamoDb && !this.config.disabled.dynamoDb && evt && evt.Records && evt.Records.length > 0)) return [3 /*break*/, 3];
finder = evt.Records[0].eventSourceARN;
handler = this.findInMap(finder, this.config.dynamoDb.handlers);
if (!handler) return [3 /*break*/, 2];
return [4 /*yield*/, handler(evt)];
case 1:
rval = _a.sent();
return [3 /*break*/, 3];
case 2:
logger_1.Logger.info('Found no Dynamo handler for : %s', finder);
_a.label = 3;
case 3: return [2 /*return*/, rval];
}
});
});
};
EpsilonGlobalHandler.prototype.findInMap = function (toFind, map) {
var _this = this;
var rval = null;
map.forEach(function (val, key) {
if (_this.matchExact(key, toFind)) {
rval = val;
}
});
return rval;
};
EpsilonGlobalHandler.prototype.matchExact = function (r, str) {
var match = str.match(r);
return match != null && str == match[0];
};
return EpsilonGlobalHandler;
}());
exports.EpsilonGlobalHandler = EpsilonGlobalHandler;
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