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import { Session } from "./Session/session";
import { Email } from "./ActionUtilities";
import { red, yellow } from "colors";
import { SolrManager } from "./ApiManagers/SearchManager";
import { execSync } from "child_process";
import { isMaster } from "cluster";
import { Utils } from "../Utils";
import { WebSocket } from "./Websocket/Websocket";
import { MessageStore } from "./Message";
import { launchServer } from ".";
const notificationRecipients = ["samuel_wilkins@brown.edu"];
const signature = "-Dash Server Session Manager";
const monitorHooks: Session.MonitorNotifierHooks = {
key: async (key, masterLog) => {
const content = `The key for this session (started @ ${new Date().toUTCString()}) is ${key}.\n\n${signature}`;
const failures = await Email.dispatchAll(notificationRecipients, "Server Termination Key", content);
if (failures) {
failures.map(({ recipient, error: { message } }) => masterLog(red(`dispatch failure @ ${recipient} (${yellow(message)})`)));
return false;
}
return true;
},
crash: async ({ name, message, stack }, masterLog) => {
const body = [
"You, as a Dash Administrator, are being notified of a server crash event. Here's what we know:",
`name:\n${name}`,
`message:\n${message}`,
`stack:\n${stack}`,
"The server is already restarting itself, but if you're concerned, use the Remote Desktop Connection to monitor progress.",
].join("\n\n");
const content = `${body}\n\n${signature}`;
const failures = await Email.dispatchAll(notificationRecipients, "Dash Web Server Crash", content);
if (failures) {
failures.map(({ recipient, error: { message } }) => masterLog(red(`dispatch failure @ ${recipient} (${yellow(message)})`)));
return false;
}
return true;
}
};
export class DashSessionAgent extends Session.AppliedSessionAgent {
/**
* If we're the monitor (master) thread, we should launch the monitor logic for the session.
* Otherwise, we must be on a worker thread that was spawned *by* the monitor (master) thread, and thus
* our job should be to run the server.
*/
protected async launchImplementation() {
if (isMaster) {
this.sessionMonitor = await Session.initializeMonitorThread(monitorHooks);
this.sessionMonitor.addReplCommand("pull", [], () => execSync("git pull", { stdio: ["ignore", "inherit", "inherit"] }));
this.sessionMonitor.addReplCommand("solr", [/start|stop/g], args => SolrManager.SetRunning(args[0] === "start"));
} else {
this.serverWorker = await Session.initializeWorkerThread(launchServer); // server initialization delegated to worker
this.serverWorker.addExitHandler(() => Utils.Emit(WebSocket._socket, MessageStore.ConnectionTerminated, "Manual"));
}
}
}
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