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import { Context } from "aws-lambda";
import { BotInvocationEvent, RStreamsContext } from "../lib/types";
import { BotHandler } from "./cron";
function getEmptyContext(): Context {
return {
callbackWaitsForEmptyEventLoop: false,
functionName: process.env.AWS_LAMBDA_FUNCTION_NAME,
functionVersion: process.env.AWS_LAMBDA_FUNCTION_VERSION,
invokedFunctionArn: `arn:aws:lambda:${process.env.AWS_REGION}:--:function:${process.env.AWS_LAMBDA_FUNCTION_NAME}`,
memoryLimitInMB: process.env.AWS_LAMBDA_FUNCTION_MEMORY_SIZE,
awsRequestId: `awsRequestId-unknown-${Date.now()}`,
logGroupName: process.env.AWS_LAMBDA_LOG_GROUP_NAME,
logStreamName: process.env.AWS_LAMBDA_LOG_STREAM_NAME,
getRemainingTimeInMillis: function (): number {
throw new Error("Function not implemented.");
},
done: function (error?: Error, result?: any): void {
throw new Error("Function not implemented.");
},
fail: function (error: string | Error): void {
throw new Error("Function not implemented.");
},
succeed: function (messageOrObject: any): void {
throw new Error("Function not implemented.");
}
}
}
module.exports = function <T extends BotInvocationEvent, R>(botHandler: BotHandler<T, R>) {
// Attach any environment resources
(process as any).resources = process.env.Resources && JSON.parse(process.env.Resources) || {};
let config = require("../leoConfigure.js");
const logger = require('leo-logger')('bot.wrapper');
const leosdk = require("../index.js")();
const refUtil = require("../lib/reference.js");
(process as any).__config = config;
const botId = config.name;
//const settings = config.cron && config.cron.settings || {};
const moment = require("moment");
const cron = leosdk.bot;
//const dynamodb = leosdk.aws.dynamodb;
for (let x of process.listeners('uncaughtException')) { //remove lambdas default listener
process.removeListener('uncaughtException', x);
}
let theCallback;
let theContext: Context = getEmptyContext();
let __theEvent: BotInvocationEvent = {
botId: "",
__cron: undefined
};
process.on('uncaughtException', function (err) {
console.log(`[LEOCRON]:end:${config.name}:${theContext.awsRequestId}`);
logger.error((new Date).toUTCString() + ' uncaughtException:', err.message);
logger.error(err.stack);
if (__theEvent.__cron) {
cron.reportComplete(__theEvent.__cron, theContext.awsRequestId, "error", {
msg: err.message,
stack: err.stack
}, {}, function () {
console.log("Cron Lock removed");
if (theCallback) {
theCallback(null, "Application Error");
}
});
} else {
cron.removeLock(config.name, theContext.awsRequestId, function () {
console.log("Lock removed");
if (theCallback) {
theCallback(null, "Application Error");
}
});
}
});
function empty(obj) {
for (let k in obj) {
delete obj[k];
}
}
return function (event, context: RStreamsContext, callback) {
context.callbackWaitsForEmptyEventLoop = false;
context.resources = (process as any).resources;
context.botId = event.botId || botId;
context.getCheckpoint = async function (queue: string, defaultIfNull: string) {
let queueRef = refUtil.ref(queue);
let c = event.start || (
event.__cron &&
event.__cron.checkpoints &&
event.__cron.checkpoints.read &&
(
(event.__cron.checkpoints.read[queueRef] && event.__cron.checkpoints.read[queueRef].checkpoint) ||
(event.__cron.checkpoints.read[queueRef.id] && event.__cron.checkpoints.read[queueRef.id].checkpoint))
) || defaultIfNull;
return c;
};
//context.settings = settings;
context.sdk = leosdk;
theCallback = callback;
//clear out the registry
empty(config.registry);
leosdk.configuration.registry = config.registry;
config.registry.context = context;
config.registry.__cron = event.__cron;
global.cron_run_again = false;
if (event.__cron && event.__cron.id) { //If it is in cron, use that regardless
config.registry.id = event.__cron.id;
} else if (!config.registry.id) { //If they didn't specify it in their config, then let's get it from the function name
config.registry.id = process.env.AWS_LAMBDA_FUNCTION_NAME;
}
logger.log("Registry", JSON.stringify(config.registry, null, 2));
theContext = context;
__theEvent = event;
if (event.__cron) {
let cronkey = event.__cron.id + ":" + event.__cron.iid + ":" + event.__cron.ts + ":" + context.awsRequestId;
console.log("[LEOCRON]:check:" + cronkey);
logger.log("Locking on __cron", event.__cron);
let startTime = moment.now();
cron.checkLock(event.__cron, context.awsRequestId, context.getRemainingTimeInMillis(), function (err, data) {
if (err) {
if (err && err.code == "ConditionalCheckFailedException") {
logger.log("LOCK EXISTS, cannot run");
callback(null, "already running");
} else {
logger.error("Failed getting lock, cannot run");
callback(null, "failed getting lock");
}
} else {
try {
console.log("[LEOCRON]:start:" + cronkey);
botHandler(event || {}, context)
.then(data => {
console.log("[LEOCRON]:complete:" + cronkey);
cron.reportComplete(event.__cron, context.awsRequestId, err ? "error" : "complete", err ? err : '', {}, function (err2, data2) {
if (err || err2) {
logger.log(err || err2);
}
callback(null, err || data);
});
})
.catch(err => {
console.log("[LEOCRON]:complete:" + cronkey);
cron.reportComplete(event.__cron, context.awsRequestId, "error", err, {}, function () {
callback(null, err);
});
});
} catch (e) {
logger.log("error", e);
cron.reportComplete(event.__cron, context.awsRequestId, "error", {
msg: e.message,
stack: e.stack
}, {}, function () {
callback(null, e);
});
}
}
});
} else {
throw new Error("Couldn't obtain lock. Unknown bot id");
}
}
}
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