Files
smartmta/dist_ts/mail/delivery/classes.delivery.queue.js
2026-02-10 15:54:09 +00:00

488 lines
34 KiB
JavaScript

import * as plugins from '../../plugins.js';
import { EventEmitter } from 'node:events';
import * as fs from 'node:fs';
import * as path from 'node:path';
import { logger } from '../../logger.js';
import {} from '../routing/classes.email.config.js';
/**
* A unified queue for all email modes
*/
export class UnifiedDeliveryQueue extends EventEmitter {
options;
queue = new Map();
checkTimer;
stats;
processing = false;
totalProcessed = 0;
/**
* Create a new unified delivery queue
* @param options Queue options
*/
constructor(options) {
super();
// Set default options
this.options = {
storageType: options.storageType || 'memory',
persistentPath: options.persistentPath || path.join(process.cwd(), 'email-queue'),
checkInterval: options.checkInterval || 30000, // 30 seconds
maxQueueSize: options.maxQueueSize || 10000,
maxPerDestination: options.maxPerDestination || 100,
maxRetries: options.maxRetries || 5,
baseRetryDelay: options.baseRetryDelay || 60000, // 1 minute
maxRetryDelay: options.maxRetryDelay || 3600000 // 1 hour
};
// Initialize statistics
this.stats = {
queueSize: 0,
status: {
pending: 0,
processing: 0,
delivered: 0,
failed: 0,
deferred: 0
},
modes: {
forward: 0,
mta: 0,
process: 0
},
averageAttempts: 0,
totalProcessed: 0,
processingActive: false
};
}
/**
* Initialize the queue
*/
async initialize() {
logger.log('info', 'Initializing UnifiedDeliveryQueue');
try {
// Create persistent storage directory if using disk storage
if (this.options.storageType === 'disk') {
if (!fs.existsSync(this.options.persistentPath)) {
fs.mkdirSync(this.options.persistentPath, { recursive: true });
}
// Load existing items from disk
await this.loadFromDisk();
}
// Start the queue processing timer
this.startProcessing();
// Emit initialized event
this.emit('initialized');
logger.log('info', 'UnifiedDeliveryQueue initialized successfully');
}
catch (error) {
logger.log('error', `Failed to initialize queue: ${error.message}`);
throw error;
}
}
/**
* Start queue processing
*/
startProcessing() {
if (this.checkTimer) {
clearInterval(this.checkTimer);
}
this.checkTimer = setInterval(() => this.processQueue(), this.options.checkInterval);
this.processing = true;
this.stats.processingActive = true;
this.emit('processingStarted');
logger.log('info', 'Queue processing started');
}
/**
* Stop queue processing
*/
stopProcessing() {
if (this.checkTimer) {
clearInterval(this.checkTimer);
this.checkTimer = undefined;
}
this.processing = false;
this.stats.processingActive = false;
this.emit('processingStopped');
logger.log('info', 'Queue processing stopped');
}
/**
* Check for items that need to be processed
*/
async processQueue() {
try {
const now = new Date();
let readyItems = [];
// Find items ready for processing
for (const item of this.queue.values()) {
if (item.status === 'pending' || (item.status === 'deferred' && item.nextAttempt <= now)) {
readyItems.push(item);
}
}
if (readyItems.length === 0) {
return;
}
// Sort by oldest first
readyItems.sort((a, b) => a.createdAt.getTime() - b.createdAt.getTime());
// Emit event for ready items
this.emit('itemsReady', readyItems);
logger.log('info', `Found ${readyItems.length} items ready for processing`);
// Update statistics
this.updateStats();
}
catch (error) {
logger.log('error', `Error processing queue: ${error.message}`);
this.emit('error', error);
}
}
/**
* Add an item to the queue
* @param processingResult Processing result to queue
* @param mode Processing mode
* @param route Email route
*/
async enqueue(processingResult, mode, route) {
// Check if queue is full
if (this.queue.size >= this.options.maxQueueSize) {
throw new Error('Queue is full');
}
// Generate a unique ID
const id = `${Date.now()}-${Math.random().toString(36).substring(2, 15)}`;
// Create queue item
const item = {
id,
processingMode: mode,
processingResult,
route,
status: 'pending',
attempts: 0,
nextAttempt: new Date(),
createdAt: new Date(),
updatedAt: new Date()
};
// Add to queue
this.queue.set(id, item);
// Persist to disk if using disk storage
if (this.options.storageType === 'disk') {
await this.persistItem(item);
}
// Update statistics
this.updateStats();
// Emit event
this.emit('itemEnqueued', item);
logger.log('info', `Item enqueued with ID ${id}, mode: ${mode}`);
return id;
}
/**
* Get an item from the queue
* @param id Item ID
*/
getItem(id) {
return this.queue.get(id);
}
/**
* Mark an item as being processed
* @param id Item ID
*/
async markProcessing(id) {
const item = this.queue.get(id);
if (!item) {
return false;
}
// Update status
item.status = 'processing';
item.attempts++;
item.updatedAt = new Date();
// Persist changes if using disk storage
if (this.options.storageType === 'disk') {
await this.persistItem(item);
}
// Update statistics
this.updateStats();
// Emit event
this.emit('itemProcessing', item);
logger.log('info', `Item ${id} marked as processing, attempt ${item.attempts}`);
return true;
}
/**
* Mark an item as delivered
* @param id Item ID
*/
async markDelivered(id) {
const item = this.queue.get(id);
if (!item) {
return false;
}
// Update status
item.status = 'delivered';
item.updatedAt = new Date();
item.deliveredAt = new Date();
// Persist changes if using disk storage
if (this.options.storageType === 'disk') {
await this.persistItem(item);
}
// Update statistics
this.totalProcessed++;
this.updateStats();
// Emit event
this.emit('itemDelivered', item);
logger.log('info', `Item ${id} marked as delivered after ${item.attempts} attempts`);
return true;
}
/**
* Mark an item as failed
* @param id Item ID
* @param error Error message
*/
async markFailed(id, error) {
const item = this.queue.get(id);
if (!item) {
return false;
}
// Determine if we should retry
if (item.attempts < this.options.maxRetries) {
// Calculate next retry time with exponential backoff
const delay = Math.min(this.options.baseRetryDelay * Math.pow(2, item.attempts - 1), this.options.maxRetryDelay);
// Update status
item.status = 'deferred';
item.lastError = error;
item.nextAttempt = new Date(Date.now() + delay);
item.updatedAt = new Date();
// Persist changes if using disk storage
if (this.options.storageType === 'disk') {
await this.persistItem(item);
}
// Emit event
this.emit('itemDeferred', item);
logger.log('info', `Item ${id} deferred for ${delay}ms, attempt ${item.attempts}, error: ${error}`);
}
else {
// Mark as permanently failed
item.status = 'failed';
item.lastError = error;
item.updatedAt = new Date();
// Persist changes if using disk storage
if (this.options.storageType === 'disk') {
await this.persistItem(item);
}
// Update statistics
this.totalProcessed++;
// Emit event
this.emit('itemFailed', item);
logger.log('warn', `Item ${id} permanently failed after ${item.attempts} attempts, error: ${error}`);
}
// Update statistics
this.updateStats();
return true;
}
/**
* Remove an item from the queue
* @param id Item ID
*/
async removeItem(id) {
const item = this.queue.get(id);
if (!item) {
return false;
}
// Remove from queue
this.queue.delete(id);
// Remove from disk if using disk storage
if (this.options.storageType === 'disk') {
await this.removeItemFromDisk(id);
}
// Update statistics
this.updateStats();
// Emit event
this.emit('itemRemoved', item);
logger.log('info', `Item ${id} removed from queue`);
return true;
}
/**
* Persist an item to disk
* @param item Item to persist
*/
async persistItem(item) {
try {
const filePath = path.join(this.options.persistentPath, `${item.id}.json`);
await fs.promises.writeFile(filePath, JSON.stringify(item, null, 2), 'utf8');
}
catch (error) {
logger.log('error', `Failed to persist item ${item.id}: ${error.message}`);
this.emit('error', error);
}
}
/**
* Remove an item from disk
* @param id Item ID
*/
async removeItemFromDisk(id) {
try {
const filePath = path.join(this.options.persistentPath, `${id}.json`);
if (fs.existsSync(filePath)) {
await fs.promises.unlink(filePath);
}
}
catch (error) {
logger.log('error', `Failed to remove item ${id} from disk: ${error.message}`);
this.emit('error', error);
}
}
/**
* Load queue items from disk
*/
async loadFromDisk() {
try {
// Check if directory exists
if (!fs.existsSync(this.options.persistentPath)) {
return;
}
// Get all JSON files
const files = fs.readdirSync(this.options.persistentPath).filter(file => file.endsWith('.json'));
// Load each file
for (const file of files) {
try {
const filePath = path.join(this.options.persistentPath, file);
const data = await fs.promises.readFile(filePath, 'utf8');
const item = JSON.parse(data);
// Convert date strings to Date objects
item.createdAt = new Date(item.createdAt);
item.updatedAt = new Date(item.updatedAt);
item.nextAttempt = new Date(item.nextAttempt);
if (item.deliveredAt) {
item.deliveredAt = new Date(item.deliveredAt);
}
// Add to queue
this.queue.set(item.id, item);
}
catch (error) {
logger.log('error', `Failed to load item from ${file}: ${error.message}`);
}
}
// Update statistics
this.updateStats();
logger.log('info', `Loaded ${this.queue.size} items from disk`);
}
catch (error) {
logger.log('error', `Failed to load items from disk: ${error.message}`);
throw error;
}
}
/**
* Update queue statistics
*/
updateStats() {
// Reset counters
this.stats.queueSize = this.queue.size;
this.stats.status = {
pending: 0,
processing: 0,
delivered: 0,
failed: 0,
deferred: 0
};
this.stats.modes = {
forward: 0,
mta: 0,
process: 0
};
let totalAttempts = 0;
let oldestTime = Date.now();
let newestTime = 0;
// Count by status and mode
for (const item of this.queue.values()) {
// Count by status
this.stats.status[item.status]++;
// Count by mode
this.stats.modes[item.processingMode]++;
// Track total attempts
totalAttempts += item.attempts;
// Track oldest and newest
const itemTime = item.createdAt.getTime();
if (itemTime < oldestTime) {
oldestTime = itemTime;
}
if (itemTime > newestTime) {
newestTime = itemTime;
}
}
// Calculate average attempts
this.stats.averageAttempts = this.queue.size > 0 ? totalAttempts / this.queue.size : 0;
// Set oldest and newest
this.stats.oldestItem = this.queue.size > 0 ? new Date(oldestTime) : undefined;
this.stats.newestItem = this.queue.size > 0 ? new Date(newestTime) : undefined;
// Set total processed
this.stats.totalProcessed = this.totalProcessed;
// Set processing active
this.stats.processingActive = this.processing;
// Emit statistics event
this.emit('statsUpdated', this.stats);
}
/**
* Get queue statistics
*/
getStats() {
return { ...this.stats };
}
/**
* Pause queue processing
*/
pause() {
if (this.processing) {
this.stopProcessing();
logger.log('info', 'Queue processing paused');
}
}
/**
* Resume queue processing
*/
resume() {
if (!this.processing) {
this.startProcessing();
logger.log('info', 'Queue processing resumed');
}
}
/**
* Clean up old delivered and failed items
* @param maxAge Maximum age in milliseconds (default: 7 days)
*/
async cleanupOldItems(maxAge = 7 * 24 * 60 * 60 * 1000) {
const cutoff = new Date(Date.now() - maxAge);
let removedCount = 0;
// Find old items
for (const item of this.queue.values()) {
if (['delivered', 'failed'].includes(item.status) && item.updatedAt < cutoff) {
// Remove item
await this.removeItem(item.id);
removedCount++;
}
}
logger.log('info', `Cleaned up ${removedCount} old items`);
return removedCount;
}
/**
* Shutdown the queue
*/
async shutdown() {
logger.log('info', 'Shutting down UnifiedDeliveryQueue');
// Stop processing
this.stopProcessing();
// Clear the check timer to prevent memory leaks
if (this.checkTimer) {
clearInterval(this.checkTimer);
this.checkTimer = undefined;
}
// If using disk storage, make sure all items are persisted
if (this.options.storageType === 'disk') {
const pendingWrites = [];
for (const item of this.queue.values()) {
pendingWrites.push(this.persistItem(item));
}
// Wait for all writes to complete
await Promise.all(pendingWrites);
}
// Clear the queue (memory only)
this.queue.clear();
// Update statistics
this.updateStats();
// Emit shutdown event
this.emit('shutdown');
logger.log('info', 'UnifiedDeliveryQueue shut down successfully');
}
}
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