# * 表示自動(dòng)生成id redis會(huì)根據(jù)時(shí)間戳+序列號(hào)自動(dòng)生成id，不建議我們自己指定id
xadd stream1 * name zs age 23  

#表示從 stream1 內(nèi)取出一條消息，從第0條消息讀取(0表示最小的id)
xread count 1 streams stream1 0
#表示從 stream1 內(nèi) id=1649143363972-0 開(kāi)始讀取一條消息，讀取的是指定id的下一條消息
xread count 1 streams msg 1649143363972-0

#表示一直阻塞讀取最新的消息($表示獲取下一個(gè)生成的消息)
xread count 1 block 0 streams stream1 $ 

xrange stream - + 10

#表示從stream1內(nèi)取10條消息 起始位置為 -(最小ID) 結(jié)束位置為+(最大ID)
xrange stream1 - + 10 

#消費(fèi)消息首先得創(chuàng)建消費(fèi)者組
# 表示為隊(duì)列 stream1 創(chuàng)建一個(gè)消費(fèi)者組 group1 從消息id=0(第一條消息)開(kāi)始讀取消息
xgroup create stream1 group1 0

#查詢(xún)stream1內(nèi)的所有消費(fèi)者組信息
xinfo groups stream1

#創(chuàng)建消費(fèi)者讀取消息
#在group1消費(fèi)者組內(nèi)通過(guò)consumer1消費(fèi)stream1內(nèi)的消息，消費(fèi)1條未分配的消息 (> 表示未分配過(guò)消費(fèi)者的消息)
xreadgrup group group1 consumer1 count 1 streams stream1 > 

#查看pending列表
# 查看group1組內(nèi)的consumer1的pending列表 - 表示最小的消息id + 表示最大的消息ID
xpending stream1 group1 - + 10 consumer1
# 查看group1組內(nèi)的所有消費(fèi)者pending類(lèi)表
xpending stream1 group1 - + 10 

xack stream1 group1 xxx

# 表示將ID為 1553585533795-1 的消息轉(zhuǎn)移到消費(fèi)者B消費(fèi)，前提是消費(fèi)
XCLAIM stream1 group1 consumer1 3600000 1553585533795-1

#查看sream信息
xinfo stream steam1
#查詢(xún)消費(fèi)者組信息
xinfo groups group1 

#查詢(xún)消費(fèi)者信息
xinfo consumers consumer1

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

@Slf4j
@Component
public class EmailConsumer implements StreamListener<String, MapRecord<String,String,String>> {

    public final String streamName      = "emailStream";
    public final String groupName       = "emailGroup";
    public final String consumerName    = "emailConsumer";


    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public void onMessage(MapRecord<String, String, String> message) {

        //log.info("stream名稱(chēng)-->{}",message.getStream());
        //log.info("消息ID-->{}",message.getId());
        log.info("消息內(nèi)容-->{}",message.getValue());

        Map<String, String> msgMap = message.getValue();

        if( msgMap.get("sID")!=null && Integer.valueOf(msgMap.get("sID")) % 3 ==0 ){
            //消費(fèi)異常導(dǎo)致未能ack時(shí)，消息會(huì)進(jìn)入pending列表，我們可以啟動(dòng)定時(shí)任務(wù)來(lái)讀取pending列表處理失敗的任務(wù)
            log.info("消費(fèi)異常-->"+message);
           return;
        }

        StreamOperations<String, String, String> streamOperations = stringRedisTemplate.opsForStream();
        //消息應(yīng)答
        streamOperations.acknowledge( streamName,groupName,message.getId() );

    }
	//我們可以啟動(dòng)定時(shí)任務(wù)不斷監(jiān)聽(tīng)pending列表，處理死信消息
}

@EnableCaching
@Configuration
public class RedisConfig {


    /**
     * 設(shè)置redis序列化規(guī)則
     */
    @Bean
    public Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer(){
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);

        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        jackson2JsonRedisSerializer.setObjectMapper(om);

        return jackson2JsonRedisSerializer;
    }

    /**
     * RedisTemplate配置
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory,
                                                       Jackson2JsonRedisSerializer jackson2JsonRedisSerializer) {

        // 配置redisTemplate
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        RedisSerializer<?> stringSerializer = new StringRedisSerializer();

        // key序列化
        redisTemplate.setKeySerializer(stringSerializer);
        // value序列化
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);

        // Hash key序列化
        redisTemplate.setHashKeySerializer(stringSerializer);
        // Hash value序列化
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);

        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }

}

@Slf4j
@Configuration
public class RedisStreamConfig {

    @Autowired
    private EmailConsumer emailConsumer;

    @Autowired
    private RedisTemplate<String,Object> redisTemplate;

    @Bean
    public StreamMessageListenerContainer.StreamMessageListenerContainerOptions<String, MapRecord<String,String,String>> emailListenerContainerOptions(){

        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();

        return StreamMessageListenerContainer.StreamMessageListenerContainerOptions
                .builder()
                //block讀取超時(shí)時(shí)間
                .pollTimeout(Duration.ofSeconds(3))
                //count 數(shù)量（一次只獲取一條消息）
                .batchSize(1)
                //序列化規(guī)則
                .serializer( stringRedisSerializer )
                .build();
    }

    /**
     * 開(kāi)啟監(jiān)聽(tīng)器接收消息
     */
    @Bean
    public StreamMessageListenerContainer<String,MapRecord<String,String,String>> emailListenerContainer(RedisConnectionFactory factory,
                                                                 StreamMessageListenerContainer.StreamMessageListenerContainerOptions<String, MapRecord<String,String,String>> streamMessageListenerContainerOptions){

        StreamMessageListenerContainer<String,MapRecord<String,String,String>> listenerContainer = StreamMessageListenerContainer.create(factory,
                streamMessageListenerContainerOptions);

        //如果 流不存在 創(chuàng)建 stream 流
        if( !redisTemplate.hasKey(emailConsumer.streamName)){
            redisTemplate.opsForStream().add(emailConsumer.streamName, Collections.singletonMap("", ""));
            log.info("初始化stream {} success",emailConsumer.streamName);
        }

        //創(chuàng)建消費(fèi)者組
        try {
            redisTemplate.opsForStream().createGroup(emailConsumer.streamName,emailConsumer.groupName);
        } catch (Exception e) {
            log.info("消費(fèi)者組 {} 已存在",emailConsumer.groupName);
        }

        //注冊(cè)消費(fèi)者 消費(fèi)者名稱(chēng)，從哪條消息開(kāi)始消費(fèi)，消費(fèi)者類(lèi)
        // > 表示沒(méi)消費(fèi)過(guò)的消息
        // $ 表示最新的消息
        listenerContainer.receive(
            Consumer.from(emailConsumer.groupName, emailConsumer.consumerName),
            StreamOffset.create(emailConsumer.streamName, ReadOffset.lastConsumed()),
            emailConsumer
        );


        listenerContainer.start();
        return listenerContainer;
    }

}

@GetMapping("/redis/ps")
public String redisPublish(String content,Integer count){

    StreamOperations streamOperations = redisTemplate.opsForStream();

    for (int i = 0; i < count; i++) {
        AtomicInteger num = new AtomicInteger(i);

        Map msgMap = new HashMap();
        msgMap.put("count", i);
        msgMap.put("sID", num);
        //新增消息
        streamOperations.add("emailStream",msgMap);
    }
    return "success";
}