What are some examples of retry logic in different programming languages?

Can you explain retry logic and give examples in different programming languages?

Retry logic is a programming pattern used to handle transient failures by attempting an operation multiple times. For example, in Python, you can use a loop with a try-except block to implement retry logic.

How would that look in Python?

Here's a simple example in Python:

import time

def retry_operation(max_retries):
    for attempt in range(max_retries):
        try:
            # Your operation here
            print('Operation successful')
            break  # Exit loop on success
        except Exception as e:
            print(f'Attempt {attempt + 1} failed: {e}')
            time.sleep(2)  # Wait before retrying

This code will attempt the operation up to max_retries times.

What about in Java?

In Java, you can implement retry logic using a loop and exception handling as well. Here's a basic example:

public void retryOperation(int maxRetries) {
    for (int attempt = 0; attempt < maxRetries; attempt++) {
        try {
            // Your operation here
            System.out.println("Operation successful");
            break; // Exit loop on success
        } catch (Exception e) {
            System.out.println("Attempt " + (attempt + 1) + " failed: " + e.getMessage());
            try {
                Thread.sleep(2000); // Wait before retrying
            } catch (InterruptedException ie) {
                Thread.currentThread().interrupt();
            }
        }
    }
}

Can you show me an example in JavaScript?

Certainly! In JavaScript, you can use async/await with a loop to implement retry logic. Here's an example:

async function retryOperation(maxRetries) {
    for (let attempt = 0; attempt < maxRetries; attempt++) {
        try {
            // Your operation here
            console.log('Operation successful');
            break; // Exit loop on success
        } catch (e) {
            console.log(`Attempt ${attempt + 1} failed: ${e.message}`);
            await new Promise(resolve => setTimeout(resolve, 2000)); // Wait before retrying
        }
    }
}