Working with Connections

import pika

# Define connection parameters
credentials = pika.PlainCredentials('user', 'password')
parameters = pika.ConnectionParameters(
    host='localhost',
    port=5672,
    virtual_host='/',
    credentials=credentials,
    heartbeat=60,
    connection_timeout=60000
)

# Create the connection
connection = pika.BlockingConnection(parameters)
print("Connected to RabbitMQ successfully")

amqp://username:password@host:port/vhost?heartbeat=60&timeout=30

const amqp = require('amqplib');

const connectionOptions = {
  host: 'localhost',
  port: 5672,
  username: 'user',
  password: 'password',
  virtual_host: '/',
  connection_timeout: 60,
  heartbeat: 60,
  ssl: false
};

amqp.connect(connectionOptions).then((conn) => {
  console.log('Connected to RabbitMQ');
});

const amqp = require('amqplib');

const secureConnectionOptions = {
  host: 'rabbitmq.example.com',
  port: 5671,
  username: 'user',
  password: 'password',
  virtual_host: '/',
  connection_timeout: 60,
  heartbeat: 60,
  ssl: true
};

amqp.connect(secureConnectionOptions).then((conn) => {
  console.log('Securely connected to RabbitMQ');
});

const amqp = require('amqplib');

amqp.connect('amqp://localhost', {
  connectionTimeout: 30000
}).then((connection) => {
  console.log('Connected to RabbitMQ');
}).catch((err) => {
  console.error('Failed to connect:', err);
});

const amqp = require('amqplib');

amqp.connect('amqp://localhost', {
  heartbeat: 60,
  connectionTimeout: 30000
}).then(conn => {
  console.log('Connected with heartbeat interval of 60 seconds');
});

import com.rabbitmq.client.ConnectionFactory;

ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
factory.setPort(5672);
factory.setUsername("user");
factory.setPassword("password");
factory.setConnectionTimeout(30000);
factory.setRequestedHeartbeat(60);

// Set pool size (if using a library that supports it)
factory.setConnectionPoolSize(10);

const amqp = require('amqplib');

async function connectWithRecovery() {
  const connectionUrl = 'amqp://user:pass@localhost:5672';
  
  const connection = await amqp.connect(connectionUrl, {
    // Enable automatic reconnection
    connectionTimeout: 10000,
    heartbeatIntervalInSeconds: 30,
    // Recovery options
    recoverCallback: (err, recovery) => {
      console.log('Recovery attempt:', err.message);
    }
  });
  
  return connection;
}

const amqp = require('amqplib');

let connection;
let channel;

async function setupConnectionWithRetry(maxRetries = 5) {
  let retries = 0;
  
  while (retries < maxRetries) {
    try {
      connection = await amqp.connect('amqp://localhost:5672');
      channel = await connection.createChannel();
      
      // Handle connection close
      connection.on('close', (err) => {
        console.log('Connection closed:', err.message);
        setupConnectionWithRetry(maxRetries);
      });
      
      console.log('Connected successfully');
      return;
    } catch (err) {
      retries++;
      console.log(`Connection attempt ${retries} failed:`, err.message);
      
      if (retries < maxRetries) {
        await new Promise(resolve => setTimeout(resolve, 2000 * retries));
      } else {
        throw new Error('Max retries exceeded');
      }
    }
  }
}

const amqp = require('amqplib');

async function setupBlockedNotifications() {
  const connection = await amqp.connect('amqp://localhost');
  const channel = await connection.createChannel();

  // Set up blocked connection notification
  connection.on('blocked', (reason) => {
    console.log('Connection blocked:', reason);
  });

  connection.on('unblocked', () => {
    console.log('Connection unblocked');
  });

  // Your application logic here
}

setupBlockedNotifications().catch(console.error);

const amqp = require('amqplib');

amqp.connect('amqp://localhost').then(conn => {
  return conn.createChannel().then(ch => {
    // Do some work...
    ch.close();
    conn.close();
  });
}).catch(err => {
  console.error('Error:', err);
});

rabbitmqctl list_connections

const axios = require('axios');\n\nasync function getActiveConnections() {\n  try {\n    const response = await axios.get('http://localhost:15672/api/connections', {\n      auth: {\n        username: 'admin',\n        password: 'password'\n      }\n    });\n    console.log(response.data);\n  } catch (error) {\n    console.error('Error fetching connections:', error);\n  }\n}

listeners.tcp.default = 5672
max_connections = 2048
max_channels_per_connection = 4096
frame_max = 131072

const amqp = require('amqplib');

async function connectWithRetry() {
  const maxRetries = 5;
  let retries = 0;

  while (retries < maxRetries) {
    try {
      const connection = await amqp.connect('amqp://user:pass@localhost');
      console.log('Connected successfully');
      return connection;
    } catch (err) {
      retries++;
      console.error(`Connection attempt ${retries} failed:`, err.message);
      if (retries < maxRetries) {
        await new Promise(resolve => setTimeout(resolve, 2000));
      }
    }
  }

  throw new Error('Failed to connect after maximum retries');
}

connectWithRetry().catch(err => console.error('Final error:', err));