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‎09mq/kafka-demo/.gitignore‎

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# Compiled class file
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*.class
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# Log file
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*.log
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# BlueJ files
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*.ctxt
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# Mobile Tools for Java (J2ME)
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.mtj.tmp/
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# Package Files #
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*.jar
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*.war
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*.nar
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*.ear
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*.zip
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*.tar.gz
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*.rar
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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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.idea
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*.iml

‎09mq/kafka-demo/LICENSE‎

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Apache License
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‎09mq/kafka-demo/README.md‎

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# 消息队列培训-Kafka进阶
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## 作业：具体场景下的Kafka接口设计实现
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### 背景
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请各位同学结合定序 & 撮合的业务特点, 练习 Producer + Consuer 的用法：
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- 定序要求: 数据有序并且不丢失
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- 撮合要求: 可重放, 顺序消费, 消息仅处理一次
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### 消息格式
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消息的内容格式为：// 见本仓库的代码
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```
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public class Order{
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private Long id；
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private Long ts;
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private String symbol;
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private Double price;
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// 省略setter getter...
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}
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```
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### 作业要求
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1. `Producer`接口应该有序发送消息
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2. `Producer`接口应该不丢失消息
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3. `Consumer`接口应该顺序消费消息
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4. `Consumer`接口应该支持从offset重新接收消息
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5. `Consumer`接口应该支持消息的幂等处理，即根据id去重
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6. 设计挑战：尝试接口对外暴露的使用方式，完全屏蔽了kafka的原生接口和类
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7. 编码挑战：实现程序都正确，而且写了单元测试
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### 提交方式：过程分（3分）
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1. 设计一个 `io.kimmking.javacourse.自己姓名拼音.Producer` 接口，需满足以上要求，并尝试实现
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2. 设计一个 `io.kimmking.javacourse.自己姓名拼音.Consumer` 接口，需满足以上要求，并尝试实现
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3. 提交以上代码，并提交一个Pull Request到本仓库，在钉钉群回复已经完成，1分
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09mq/pom.xml renamed to 09mq/kafka-demo/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>io.kimmking.javacourse</groupId>
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<artifactId>kafka-demo</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<packaging>jar</packaging>
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<name>kafka-demo</name>
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<description>Demo project for training-mq-03</description>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.3.0.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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<version>2.0.4.RELEASE</version>
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<relativePath/>
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</parent>
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<groupId>io.kimmking.javacourse.mq</groupId>
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<artifactId>activemq</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>activemq</name>
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<description>Demo project for Spring Boot</description>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter</artifactId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.activemq</groupId>
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<artifactId>activemq-all</artifactId>
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<version>5.16.0</version>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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</dependency>
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<optional>true</optional>
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<groupId>org.apache.kafka</groupId>
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<artifactId>kafka_2.12</artifactId>
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<version>2.6.0</version>
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</dependency>
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<dependency>
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<groupId>org.apache.kafka</groupId>
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<artifactId>kafka-clients</artifactId>
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<version>2.6.0</version>
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</dependency>
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<dependency>
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<groupId>com.alibaba</groupId>
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<artifactId>fastjson</artifactId>
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<version>1.2.58</version>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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<configuration>
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<excludes>
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<exclude>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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</exclude>
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</excludes>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎09mq/kafka-demo/src/main/java/io/kimmking/javacourse/kafka/KafkaDemo.java‎

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package io.kimmking.javacourse.kafka;
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import io.kimmking.javacourse.kafka.kimmking.ConsumerImpl;
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import io.kimmking.javacourse.kafka.kimmking.ProducerImpl;
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public class KafkaDemo {
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public static void main(String[] args) {
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//testProducer();
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testConsumer();
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}
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private static void testConsumer() {
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ConsumerImpl consumer = new ConsumerImpl();
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consumer.consumeOrder();
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}
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private static void testProducer() {
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ProducerImpl producer = new ProducerImpl();
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for (int i = 0; i < 1000; i++) {
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producer.send(new Order(1000L + i,System.currentTimeMillis(),"USD2CNY", 6.5d));
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producer.send(new Order(2000L + i,System.currentTimeMillis(),"USD2CNY", 6.51d));
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}
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}
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}

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