admin/bodyshop
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

feature/IO-2742-redis - Checkpoint, All optimizations to prevent multiple requests to redis have been applied. Things like using lists for the Log Events, to getting and setting multiple values at the same time when given the chance.

Browse Source 
Signed-off-by: Dave Richer <dave@imexsystems.ca>
This commit is contained in:
Dave Richer
2024-09-11 20:27:40 -04:00
parent f606228792
commit 4486858a86
5 changed files with 186 additions and 102 deletions
Download Patch File Download Diff File Expand all files Collapse all files

99
server.js
View File

@@ -157,19 +157,102 @@ const main = async () => {
await pubClient.del(`socket:${socketId}`);
};
// TODO: Remove, just a demo of hGet and hSet
// async function demoSessionData() {
// Store multiple session data in Redis
exports.setMultipleSessionData = async (socketId, keyValues) => {
// keyValues is expected to be an object { key1: value1, key2: value2, ... }
const entries = Object.entries(keyValues).map(([key, value]) => [key, JSON.stringify(value)]);
await pubClient.hSet(`socket:${socketId}`, ...entries.flat());
};
// Retrieve multiple session data from Redis
exports.getMultipleSessionData = async (socketId, keys) => {
const data = await pubClient.hmGet(`socket:${socketId}`, keys);
// Redis returns an object with null values for missing keys, so we parse the non-null ones
return Object.fromEntries(keys.map((key, index) => [key, data[index] ? JSON.parse(data[index]) : null]));
};
exports.setMultipleFromArraySessionData = async (socketId, keyValueArray) => {
// Use Redis multi/pipeline to batch the commands
const multi = pubClient.multi();
keyValueArray.forEach(([key, value]) => {
multi.hSet(`socket:${socketId}`, key, JSON.stringify(value));
});
await multi.exec(); // Execute all queued commands
};
// Helper function to add an item to the end of the Redis list
exports.addItemToEndOfList = async (socketId, key, newItem) => {
try {
await pubClient.rPush(`socket:${socketId}:${key}`, JSON.stringify(newItem));
} catch (error) {
console.error(`Error adding item to the end of the list for socket ${socketId}:`, error);
}
};
// Helper function to add an item to the beginning of the Redis list
exports.addItemToBeginningOfList = async (socketId, key, newItem) => {
try {
await pubClient.lPush(`socket:${socketId}:${key}`, JSON.stringify(newItem));
} catch (error) {
console.error(`Error adding item to the beginning of the list for socket ${socketId}:`, error);
}
};
// // Demo to show how all the helper functions work
// const demoSessionData = async () => {
// const socketId = "testSocketId";
//
// // Store session data using setSessionData
// await exports.setSessionData("testSocketId", "field1", "Hello, Redis Hash!");
// await exports.setSessionData(socketId, "field1", "Hello, Redis!");
//
// // Retrieve session data using getSessionData
// const value = await exports.getSessionData("testSocketId", "field1");
// const field1Value = await exports.getSessionData(socketId, "field1");
// console.log("Retrieved single field value:", field1Value);
//
// // Output the retrieved value
// console.log(value);
// // Store multiple session data using setMultipleSessionData
// await exports.setMultipleSessionData(socketId, { field2: "Second Value", field3: "Third Value" });
//
// // Retrieve multiple session data using getMultipleSessionData
// const multipleFields = await exports.getMultipleSessionData(socketId, ["field2", "field3"]);
// console.log("Retrieved multiple field values:", multipleFields);
//
// // Store multiple session data using setMultipleFromArraySessionData
// await exports.setMultipleFromArraySessionData(socketId, [
// ["field4", "Fourth Value"],
// ["field5", "Fifth Value"]
// ]);
//
// // Retrieve and log all fields
// const allFields = await exports.getMultipleSessionData(socketId, [
// "field1",
// "field2",
// "field3",
// "field4",
// "field5"
// ]);
// console.log("Retrieved all field values:", allFields);
//
// // Add item to the end of a Redis list
// await exports.addItemToEndOfList(socketId, "logEvents", { event: "Log Event 1", timestamp: new Date() });
// await exports.addItemToEndOfList(socketId, "logEvents", { event: "Log Event 2", timestamp: new Date() });
//
// // Add item to the beginning of a Redis list
// await exports.addItemToBeginningOfList(socketId, "logEvents", { event: "First Log Event", timestamp: new Date() });
//
// // Retrieve the entire list (using lRange)
// const logEvents = await pubClient.lRange(`socket:${socketId}:logEvents`, 0, -1);
// console.log("Log Events List:", logEvents.map(JSON.parse));
//
// // Clear session data
// await exports.clearSessionData(socketId);
// console.log("Session data cleared.");
// };
//
// if (process.env.NODE_ENV === "development") {
// await demoSessionData();
// }
// demoSessionData().catch(console.error);
// TODO: End of demo
require("./server/web-sockets/web-socket");