// Producer Worker - Send messages to queueexport default {  async fetch(request, env) {    const { searchParams } = new URL(request.url);    const message = searchParams.get('message');
    if (!message) {      return new Response('Missing message parameter', { status: 400 });    }
    // Send message to queue    await env.MY_QUEUE.send({      message: message,      timestamp: new Date().toISOString(),      userId: request.headers.get('X-User-ID'),    });
    return new Response('Message sent to queue', { status: 200 });  },};
// Consumer Worker - Process messages from queueexport default {  async queue(batch, env, ctx) {    for (const message of batch.messages) {      try {        // Process the message        console.log('Processing message:', message.body);
        // Simulate some work        await new Promise((resolve) => setTimeout(resolve, 1000));
        // Acknowledge the message        message.ack();      } catch (error) {        console.error('Failed to process message:', error);        message.retry();      }    }  },};

// Data ingestion workerexport default {  async fetch(request, env) {    const data = await request.json();
    // Send data to ETL queue for processing    await env.ETL_QUEUE.send({      type: 'data_ingestion',      payload: data,      timestamp: new Date().toISOString(),      source: 'api',    });
    return new Response('Data queued for processing', { status: 200 });  },};
// ETL processing workerexport default {  async queue(batch, env, ctx) {    for (const message of batch.messages) {      try {        const { type, payload } = message.body;
        if (type === 'data_ingestion') {          // Transform the data          const transformedData = await transformData(payload);
          // Store in data warehouse          await env.DATA_WAREHOUSE.prepare(            'INSERT INTO processed_data (data, processed_at) VALUES (?, ?)',          )            .bind(JSON.stringify(transformedData), new Date().toISOString())            .run();        }
        message.ack();      } catch (error) {        console.error('ETL processing failed:', error);        message.retry();      }    }  },};
async function transformData(data) {  // Your data transformation logic here  return {    ...data,    processed: true,    transformedAt: new Date().toISOString(),  };}

// URL discovery workerexport default {  async fetch(request, env) {    const { searchParams } = new URL(request.url);    const startUrl = searchParams.get('url');
    if (!startUrl) {      return new Response('Missing URL parameter', { status: 400 });    }
    // Add initial URL to crawl queue    await env.CRAWL_QUEUE.send({      url: startUrl,      depth: 0,      maxDepth: 3,    });
    return new Response('Crawling started', { status: 200 });  },};
// Crawler workerexport default {  async queue(batch, env, ctx) {    for (const message of batch.messages) {      try {        const { url, depth, maxDepth } = message.body;
        // Fetch the page        const response = await fetch(url);        const html = await response.text();
        // Extract links        const links = extractLinks(html, url);
        // Process the page content        await processPage(url, html);
        // Add new links to queue if within depth limit        if (depth < maxDepth) {          for (const link of links) {            await env.CRAWL_QUEUE.send({              url: link,              depth: depth + 1,              maxDepth: maxDepth,            });          }        }
        message.ack();      } catch (error) {        console.error('Crawling failed:', error);        message.retry();      }    }  },};
function extractLinks(html, baseUrl) {  // Simple link extraction logic  const linkRegex = /<a[^>]+href=["']([^"']+)["'][^>]*>/gi;  const links = [];  let match;
  while ((match = linkRegex.exec(html)) !== null) {    const href = match[1];    const absoluteUrl = new URL(href, baseUrl).toString();    links.push(absoluteUrl);  }
  return links;}
async function processPage(url, html) {  // Your page processing logic here  console.log(`Processed page: ${url}`);}