download:协程原理从入门到精通 每个后端开发都需要掌握的高性能开发技术
协程知识在很多课程中都有提到，但都是浅尝即止，均不深入。本课程作为市面上首门协程专题课程，将从基础讲起，与应用原理联动起来，深入协程原理更易于理解，结合丰富的课程案例，并使用Python语言进行落地实践。但一法通则万法通，不管你是Java、Go还是PHP开发，都可以通过本门课程掌握协程原理。对于初中级开发而言，是一门非常适合起手学习高性能开发的课程。
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适合人群
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希望掌握进程、线程、协程底层原理的同学
想突破业务瓶颈，提高项目并发能力的工程师
面试一问就懵，想系统梳理下协程知识的同学
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技术储备要求
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具备Python语法基础
有后端项目经验
1.根本行列消息发送和接收
简略模型，运用默许exchange，发送到指定queue，1对1发送接收。
发送方-->(默许Exchange)-->Queue-->接收方
（1）发送指定行列消息
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
public class SendDemo {
private final static String QUEUE_NAME = "hello";
public static void main(String[] argv) {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = null;
try {
connection = factory.newConnection();
Channel channel = connection.createChannel();
// 定义非耐久queue
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
String message = "Hello World!";
// 发送消息到默许exchange，指定queue
channel.basicPublish("", QUEUE_NAME, null, message.getBytes("UTF-8"));
System.out.println(" [x] Sent '" + message + "'");
channel.close();
connection.close();
} catch (IOException e) {
e.printStackTrace();
} catch (TimeoutException e) {
e.printStackTrace();
}
}
}
（2）经过拉形式消费消息（不举荐）
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.GetResponse;
/**
* 经过拉形式消费消息（不举荐）
*
* @date 2019年3月8日 下午3:31:14
*/
public class RecvPull {
private final static String QUEUE_NAME = "hello";
public static void main(String[] argv) {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = null;
try {
connection = factory.newConnection();
Channel channel = connection.createChannel();
// 定义非耐久queue
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
// 开端消费指定queue的消息
while (true) {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
GetResponse response = channel.basicGet(QUEUE_NAME, true);
if (response == null) {
continue;
}
String responseStr = new String(response.getBody());
System.out.println("responseStr: " + responseStr);
}
} catch (IOException e) {
e.printStackTrace();
} catch (TimeoutException e) {
e.printStackTrace();
}
}
}
（3）经过推形式消费消息（举荐）
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.Consumer;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
/**
* 经过推形式消费消息（举荐）
*
* @date 2019年3月8日 下午3:31:56
*/
public class RecvPush {
private final static String QUEUE_NAME = "hello";
public static void main(String[] argv) {
ConnectionFactory factory = new ConnectionFactory();
factory.setHost("localhost");
Connection connection = null;
try {
connection = factory.newConnection();
Channel channel = connection.createChannel();
// 定义非耐久queue
channel.queueDeclare(QUEUE_NAME, false, false, false, null);
System.out.println(" [*] Waiting for messages. To exit press CTRL+C");
// 定义监听顾客
Consumer consumer = new DefaultConsumer(channel) {
@Override
public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties,
byte[] body) throws IOException {
String message = new String(body, "UTF-8");
System.out.println(" [x] Received '" + message + "'");
}
};
// 开端消费指定queue的消息
channel.basicConsume(QUEUE_NAME, true, consumer);
} catch (IOException e) {
e.printStackTrace();
} catch (TimeoutException e) {
e.printStackTrace();
}
}
}
