RabbitMQ的确认机制
生产者确认
csharp
public class ProductionMessageConfirm
{
public static void Send()
{
ConnectionFactory factory = new ConnectionFactory();
factory.HostName = "localhost";//RabbitMQ服务在本地运行
factory.UserName = "guest";//用户名
factory.Password = "guest";//密码
using (var connection = factory.CreateConnection())
{
//创建通道channel
using (var channel = connection.CreateModel())
{
Console.WriteLine("生产者准备就绪....");
channel.QueueDeclare(queue: "ConfirmSelectQueue", durable: true, exclusive: false,
autoDelete: false, arguments: null);
//声明交换机exchang
channel.ExchangeDeclare(exchange: "ConfirmSelectQueueExchange", type: ExchangeType.Direct, durable: true,
autoDelete: false, arguments: null);
//绑定exchange和queue
channel.QueueBind(queue: "ConfirmSelectQueue", exchange: "ConfirmSelectQueueExchange",
routingKey: "ConfirmSelectKey");
string message = "";
//发送消息
//在控制台输入消息，按enter键发送消息
while (!message.Equals("quit", StringComparison.CurrentCultureIgnoreCase))
{
message = Console.ReadLine();
var body = Encoding.UTF8.GetBytes(message);
try
{
//开启消息确认模式
channel.ConfirmSelect();//基于当前这个channel 开启消息确认机制
//发送消息
channel.BasicPublish(exchange: "ConfirmSelectQueueExchange", routingKey: "ConfirmSelectKey",
basicProperties: null, body: body);
//事务提交
//调用WaitForConfirms 方法来判断如果消息正常发送，就返回true，否则就返回false
if (channel.WaitForConfirms()) //如果一条消息或多消息都确认发送
{
Console.WriteLine($"【{message}】发送到Broke成功！");
}
else
{
//可以记录个日志，重试一下；
}
//通过当前信道，调用WaitForConfirmsOrDie，如果所有消息发送成功 就正常执行；如果有消息发送失败；就抛出异常；
//channel.WaitForConfirmsOrDie();//如果所有消息发送成功 就正常执行；如果有消息发送失败；就抛出异常；
}
catch (Exception)
{
Console.WriteLine($"【{message}】发送到Broker失败！");
//就应该通知管理员
// 重新试一下
}
}
Console.Read();
}
}
}
}生产者事务版确认
csharp
public class ProductionMessageTx
{
public static void Send()
{
ConnectionFactory factory = new ConnectionFactory();
factory.HostName = "localhost";//RabbitMQ服务在本地运行
factory.UserName = "guest";//用户名
factory.Password = "guest";//密码
using (var connection = factory.CreateConnection())
{
//创建通道channel
using (var channel = connection.CreateModel())
{
Console.WriteLine("生产者准备就绪....");
channel.QueueDeclare(queue: "MessageTxQueue01", durable: true, exclusive: false,
autoDelete: false, arguments: null);
channel.QueueDeclare(queue: "MessageTxQueue02", durable: true, exclusive: false,
autoDelete: false, arguments: null);
//声明交换机exchang
channel.ExchangeDeclare(exchange: "MessageTxQueueExchange", type: ExchangeType.Direct, durable: true,
autoDelete: false, arguments: null);
//绑定exchange和queue
channel.QueueBind(queue: "MessageTxQueue01", exchange: "MessageTxQueueExchange",
routingKey: "MessageTxKey01");
channel.QueueBind(queue: "MessageTxQueue02", exchange: "MessageTxQueueExchange",
routingKey: "MessageTxKey02");
string message = "";
//发送消息
//在控制台输入消息，按enter键发送消息
while (!message.Equals("quit", StringComparison.CurrentCultureIgnoreCase))
{
message = Console.ReadLine();
var body = Encoding.UTF8.GetBytes(message);
try
{
//通过当前信道调用TxSelect方法开启事务机制---RabbitMQ AMQP协议，强事务保证；
channel.TxSelect(); //事务是协议支持的
//发送消息
//同时给多个队列发送消息；要么都成功；要么都失败；
//执行下面这两句话，都不会吧消息发送到队列中去；
channel.BasicPublish(exchange: "MessageTxQueueExchange", routingKey: "MessageTxKey01",
basicProperties: null, body: body);
channel.BasicPublish(exchange: "MessageTxQueueExchange", routingKey: "MessageTxKey02",
basicProperties: null, body: body);
//事务提交
channel.TxCommit(); //只有事务提交成功以后，才会真正的写入到队列里面去
//如果失败---抛出异常；
Console.WriteLine($"【{message}】发送到Broke成功！");
}
catch (Exception ex)
{
Console.WriteLine($"【{message}】发送到Broker失败！");
channel.TxRollback(); //事务回滚 或者重试一下；
throw;
}
}
Console.Read();
}
}
}
}消费者确认
自动确认
csharp
public class ConsumerMessageConfirm
{
public static void Consumption()
{
var factory = new ConnectionFactory();
factory.HostName = "localhost";//RabbitMQ服务在本地运行
factory.UserName = "guest";//用户名
factory.Password = "guest";//密码
using (var connection = factory.CreateConnection())
{
using (IModel channel = connection.CreateModel())
{
#region EventingBasicConsumer
//定义消费者
var consumer = new EventingBasicConsumer(channel);
int i = 1;
consumer.Received += (model, ea) =>
{
if (i == 11)
{
throw new Exception("");
}
i++;
Console.WriteLine(Encoding.UTF8.GetString(ea.Body.ToArray()));
};
Console.WriteLine("消费者准备就绪....");
//处理消息
//autoAck: true 自动确认：消息队列的消息直接推送给当前这个消费者；
//照单全收，消费是否正常消费，RabbitMQ不管；
channel.BasicConsume(queue: "PersistenceQueue", autoAck: true, consumer: consumer);
Console.ReadKey();
#endregion
}
}
}
}消费后确认
csharp
public class ConsumptionACKConfirm
{
public static void Consumption()
{
var factory = new ConnectionFactory();
factory.HostName = "localhost";//RabbitMQ服务在本地运行
factory.UserName = "guest";//用户名
factory.Password = "guest";//密码
using (var connection = factory.CreateConnection())
{
using (IModel channel = connection.CreateModel())
{
#region EventingBasicConsumer
//定义消费者
var consumer = new EventingBasicConsumer(channel);
int i = 0;
consumer.Received += (model, ea) =>
{
var message = Encoding.UTF8.GetString(ea.Body.ToArray());
//如果在这里处理消息的手，异常了呢？
//Console.WriteLine($"接收到消息：{message}"); ;
if (i < 50)
{
//手动确认 消息正常消费 告诉Broker：你可以把当前这条消息删除掉了
channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
Console.WriteLine(message);
}
else
{
//否定：告诉Broker，这个消息我没有正常消费； requeue: true：重新写入到队列里去； false:你还是删除掉；
channel.BasicReject(deliveryTag: ea.DeliveryTag, requeue: true);
}
i++;
};
Console.WriteLine("消费者准备就绪....");
{
//处理消息
//autoAck: true 自动确认；
//channel.BasicConsume(queue: "ConsumptionACKConfirmQueue", autoAck: true, consumer: consumer);
}
{
//处理消息
//autoAck: false 显示确认；
channel.BasicConsume(queue: "PersistenceQueue", autoAck: false, consumer: consumer);
}
Console.ReadKey();
#endregion
}
}
}
}