Examples with PulsarListener com.github.howinfun.starter.listener.PulsarListener used on opensource projects

Example 1 with PulsarListener

use of com.github.howinfun.starter.listener.PulsarListener in project study-by-myself by Howinfun.

the class PulsarConsumerAutoConfigure method run.

/**
 * 注入消费者到IOC容器
 * @param args
 * @throws Exception
 */
@Override
public void run(String... args) throws Exception {
    if (!CollectionUtils.isEmpty(this.listeners)) {
        this.listeners.forEach(baseMessageListener -> {
            // 获取当前监听器的@PulsarListener信息
            PulsarListener pulsarListener = AnnotationUtils.findAnnotation(baseMessageListener.getClass(), PulsarListener.class);
            if (Objects.nonNull(pulsarListener)) {
                try {
                    ConsumerBuilder<String> consumerBuilder = this.pulsarClient.newConsumer(Schema.STRING).receiverQueueSize(pulsarListener.receiverQueueSize());
                    if (pulsarListener.topics().length > 0) {
                        List<String> topics = new ArrayList<>(pulsarListener.topics().length);
                        String tenant = StringUtils.isBlank(pulsarListener.tenant()) ? this.pulsarProperties.getTenant() : pulsarListener.tenant();
                        String namespace = StringUtils.isBlank(pulsarListener.namespace()) ? this.pulsarProperties.getNamespace() : pulsarListener.namespace();
                        Boolean persistent = Objects.nonNull(pulsarListener.persistent()) ? pulsarListener.persistent() : Boolean.TRUE;
                        /**
                         * 处理topics
                         */
                        for (String topic : pulsarListener.topics()) {
                            topics.add(TopicUtil.generateTopic(persistent, tenant, namespace, topic));
                        }
                        consumerBuilder.topics(topics);
                        /**
                         * 处理订阅名称
                         */
                        String subscriptionName = StringUtils.isBlank(pulsarListener.subscriptionName()) ? "subscription_" + RandomUtil.randomString(3) : pulsarListener.subscriptionName();
                        consumerBuilder.subscriptionName(subscriptionName);
                        consumerBuilder.ackTimeout(Long.parseLong(pulsarListener.ackTimeout()), TimeUnit.MILLISECONDS);
                        consumerBuilder.subscriptionType(pulsarListener.subscriptionType());
                        /**
                         * 处理死信策略
                         */
                        if (Boolean.TRUE.equals(pulsarListener.enableRetry())) {
                            DeadLetterPolicy deadLetterPolicy = DeadLetterPolicy.builder().maxRedeliverCount(pulsarListener.maxRedeliverCount()).build();
                            if (StringUtils.isNotBlank(pulsarListener.retryLetterTopic())) {
                                deadLetterPolicy.setRetryLetterTopic(pulsarListener.retryLetterTopic());
                            }
                            if (StringUtils.isNotBlank(pulsarListener.deadLetterTopic())) {
                                deadLetterPolicy.setDeadLetterTopic(pulsarListener.deadLetterTopic());
                            }
                            consumerBuilder.enableRetry(pulsarListener.enableRetry()).deadLetterPolicy(deadLetterPolicy);
                        } else {
                            if (StringUtils.isNotBlank(pulsarListener.deadLetterTopic())) {
                                if (SubscriptionType.Exclusive.equals(pulsarListener.subscriptionType())) {
                                    throw new PulsarAutoConfigException("消费端仅支持在Shared/Key_Shared模式下单独使用死信队列");
                                }
                                DeadLetterPolicy deadLetterPolicy = DeadLetterPolicy.builder().maxRedeliverCount(pulsarListener.maxRedeliverCount()).deadLetterTopic(pulsarListener.deadLetterTopic()).build();
                                consumerBuilder.deadLetterPolicy(deadLetterPolicy);
                            }
                        }
                        consumerBuilder.messageListener(baseMessageListener);
                        Consumer<String> consumer = consumerBuilder.subscribe();
                        log.info("[Pulsar] 消费者初始化完毕,topic is {},", consumer.getTopic());
                    }
                } catch (PulsarClientException e) {
                    throw new PulsarAutoConfigException("[Pulsar] consumer初始化异常", e);
                }
            }
        });
    } else {
        log.warn("[Pulsar] 未发现有消费者");
    }
}