|
| 1 | +import * as http from 'http'; |
| 2 | + |
| 3 | +const PORT = process.env.PORT || 3000; |
| 4 | + |
| 5 | +// Global state |
| 6 | +let server: http.Server; |
| 7 | +let isRunning = true; |
| 8 | + |
| 9 | +// Request handler |
| 10 | +function handleRequest(req: http.IncomingMessage, res: http.ServerResponse) { |
| 11 | + if (req.url === '/health') { |
| 12 | + res.writeHead(200, {'Content-Type': 'application/json'}); |
| 13 | + res.end(JSON.stringify({status: 'healthy', timestamp: Date.now()})); |
| 14 | + } else { |
| 15 | + res.writeHead(404); |
| 16 | + res.end('Not Found!!!!!!'); |
| 17 | + } |
| 18 | +} |
| 19 | + |
| 20 | +// Computation functions |
| 21 | +function computeFibonacci(n: number): number { |
| 22 | + if (n <= 1) return n; |
| 23 | + return computeFibonacci(n - 1) + computeFibonacci(n - 2); |
| 24 | +} |
| 25 | + |
| 26 | +function checkPrime(num: number): boolean { |
| 27 | + if (num <= 1) return false; |
| 28 | + if (num <= 3) return true; |
| 29 | + if (num % 2 === 0 || num % 3 === 0) return false; |
| 30 | + |
| 31 | + for (let i = 5; i * i <= num; i += 6) { |
| 32 | + if (num % i === 0 || num % (i + 2) === 0) return false; |
| 33 | + } |
| 34 | + return true; |
| 35 | +} |
| 36 | + |
| 37 | +function findPrimesInRange(start: number, end: number): number[] { |
| 38 | + const primes: number[] = []; |
| 39 | + for (let i = start; i <= end; i++) { |
| 40 | + if (checkPrime(i)) { |
| 41 | + primes.push(i); |
| 42 | + } |
| 43 | + } |
| 44 | + return primes; |
| 45 | +} |
| 46 | + |
| 47 | +function multiplyMatrices(size: number): number[][] { |
| 48 | + const a = Array(size) |
| 49 | + .fill(0) |
| 50 | + .map(() => |
| 51 | + Array(size) |
| 52 | + .fill(0) |
| 53 | + .map(() => Math.random()) |
| 54 | + ); |
| 55 | + const b = Array(size) |
| 56 | + .fill(0) |
| 57 | + .map(() => |
| 58 | + Array(size) |
| 59 | + .fill(0) |
| 60 | + .map(() => Math.random()) |
| 61 | + ); |
| 62 | + const result = Array(size) |
| 63 | + .fill(0) |
| 64 | + .map(() => Array(size).fill(0)); |
| 65 | + |
| 66 | + for (let i = 0; i < size; i++) { |
| 67 | + for (let j = 0; j < size; j++) { |
| 68 | + for (let k = 0; k < size; k++) { |
| 69 | + result[i][j] += a[i][k] * b[k][j]; |
| 70 | + } |
| 71 | + } |
| 72 | + } |
| 73 | + return result; |
| 74 | +} |
| 75 | + |
| 76 | +async function sleep(ms: number): Promise<void> { |
| 77 | + return new Promise(resolve => setTimeout(resolve, ms)); |
| 78 | +} |
| 79 | + |
| 80 | +async function runComputationLoop(): Promise<void> { |
| 81 | + let iteration = 0; |
| 82 | + |
| 83 | + while (isRunning) { |
| 84 | + iteration++; |
| 85 | + console.log(`Starting computation iteration ${iteration} at ${new Date().toISOString()}`); |
| 86 | + |
| 87 | + // Fibonacci computation (CPU intensive) |
| 88 | + const fibStart = Date.now(); |
| 89 | + const fibResult = computeFibonacci(30 + (iteration % 5)); |
| 90 | + console.log( |
| 91 | + `Fibonacci(${30 + (iteration % 5)}) = ${fibResult} (took ${Date.now() - fibStart}ms)` |
| 92 | + ); |
| 93 | + |
| 94 | + // Short sleep |
| 95 | + await sleep(100); |
| 96 | + |
| 97 | + // Prime number search (CPU intensive) |
| 98 | + const primeStart = Date.now(); |
| 99 | + const rangeStart = 1000 + iteration * 100; |
| 100 | + const rangeEnd = rangeStart + 500; |
| 101 | + const primes = findPrimesInRange(rangeStart, rangeEnd); |
| 102 | + console.log( |
| 103 | + `Found ${primes.length} primes in range ${rangeStart}-${rangeEnd} (took ${ |
| 104 | + Date.now() - primeStart |
| 105 | + }ms)` |
| 106 | + ); |
| 107 | + |
| 108 | + // Short sleep |
| 109 | + await sleep(150); |
| 110 | + |
| 111 | + // Matrix multiplication (memory and CPU intensive) |
| 112 | + const matrixStart = Date.now(); |
| 113 | + const matrixSize = 50 + (iteration % 20); |
| 114 | + multiplyMatrices(matrixSize); |
| 115 | + console.log( |
| 116 | + `Matrix multiplication ${matrixSize}x${matrixSize} completed (took ${ |
| 117 | + Date.now() - matrixStart |
| 118 | + }ms)` |
| 119 | + ); |
| 120 | + |
| 121 | + // Longer sleep between iterations |
| 122 | + await sleep(500); |
| 123 | + } |
| 124 | +} |
| 125 | + |
| 126 | +function startServer(): Promise<void> { |
| 127 | + return new Promise(resolve => { |
| 128 | + server = http.createServer(handleRequest); |
| 129 | + server.listen(PORT, () => { |
| 130 | + console.log(`TypeScript computation server listening on port ${PORT}`); |
| 131 | + console.log(`Health endpoint available at http://localhost:${PORT}/health`); |
| 132 | + resolve(); |
| 133 | + }); |
| 134 | + }); |
| 135 | +} |
| 136 | + |
| 137 | +function stopServer(): void { |
| 138 | + isRunning = false; |
| 139 | + if (server) { |
| 140 | + server.close(); |
| 141 | + } |
| 142 | +} |
| 143 | + |
| 144 | +// Handle graceful shutdown |
| 145 | +process.on('SIGINT', () => { |
| 146 | + console.log('Received SIGINT, shutting down gracefully...'); |
| 147 | + stopServer(); |
| 148 | + process.exit(0); |
| 149 | +}); |
| 150 | + |
| 151 | +process.on('SIGTERM', () => { |
| 152 | + console.log('Received SIGTERM, shutting down gracefully...'); |
| 153 | + stopServer(); |
| 154 | + process.exit(0); |
| 155 | +}); |
| 156 | + |
| 157 | +// Start server and computation loop |
| 158 | +async function main() { |
| 159 | + try { |
| 160 | + await startServer(); |
| 161 | + console.log('Starting continuous computation loop...'); |
| 162 | + await runComputationLoop(); |
| 163 | + } catch (error) { |
| 164 | + console.error('Server error:', error); |
| 165 | + process.exit(1); |
| 166 | + } |
| 167 | +} |
| 168 | + |
| 169 | +main(); |
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