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标题:
Pulsar 入门实战(5)--Java 操作 Pulsar
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作者:
徐锦洪
时间:
2024-11-17 07:04
标题:
Pulsar 入门实战(5)--Java 操作 Pulsar
本文主要介绍使用 Java 来操作 Pulsar,文中所使用到的软件版本:Java 17.0.7(Pulsar 服务使用)、Java 1.8.0_341(客户端使用)、Pulsar 3.3.0、pulsar-client 3.3.0。
1、引入依赖
<dependency>
<groupId>org.apache.pulsar</groupId>
<artifactId>pulsar-client</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>org.apache.pulsar</groupId>
<artifactId>pulsar-client-admin</artifactId>
<version>3.3.0</version>
</dependency>
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2、初始化 PulsarClient 和 PulsarAdmin
PulsarClient:
@Before
public void before() throws PulsarClientException {
client = PulsarClient.builder()
.serviceUrl("pulsar://10.49.196.30:6650,10.49.196.31:6650,10.49.196.32:6650")
.build();
}
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PulsarAdmin:
@Before
public void before() throws PulsarClientException {
admin = PulsarAdmin.builder()
.serviceHttpUrl("http://10.49.196.30:8080,10.49.196.31:8080,10.49.196.32:8080")
.build();
}
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3、消费者
3.1、同步消费
@Test
public void sync() throws PulsarClientException {
Consumer<String> consumer = client.newConsumer(Schema.STRING)
.topic("my-topic") //主题
.subscriptionName("my-subscription") //订阅名称
.subscriptionType(SubscriptionType.Shared) //订阅模式
.subscribe();
while (true) {
Message<String> message = consumer.receive();
try {
log.info("topicName={},value={}", message.getTopicName(), message.getValue());
consumer.acknowledge(message);
} catch (Exception e) {
consumer.negativeAcknowledge(message);
}
}
}
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3.2、异步消费
public void async() throws InterruptedException {
client.newConsumer(Schema.STRING)
.topic("my-topic2")
.subscriptionName("my-subscription")
.subscriptionType(SubscriptionType.Shared)
.subscribeAsync()
.thenAccept(this::receiveAsync);
Thread.sleep(1000 * 500);
}
private void receiveAsync(Consumer<String> consumer) {
consumer.receiveAsync().thenAccept(message -> {
try {
log.info("messageId={},value={}", message.getMessageId(), message.getValue());
consumer.acknowledge(message);
} catch (Exception e) {
consumer.negativeAcknowledge(message);
}
receiveAsync(consumer);
});
}
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3.3、使用 MessageListener
@Test
public void messageListener() throws Exception {
PulsarClient client = PulsarClient.builder()
.serviceUrl("pulsar://10.49.196.30:6650,10.49.196.31:6650,10.49.196.32:6650")
.listenerThreads(3)
.build();
MessageListener<String> messageListener = (consumer, msg) -> {
try {
log.info("messageId={},value={}", msg.getMessageId(), msg.getValue());
consumer.acknowledge(msg);
} catch (Exception e) {
consumer.negativeAcknowledge(msg);
}
};
client.newConsumer(Schema.STRING)
.topic("my-topic")
.subscriptionName("my-subscription")
.subscriptionType(SubscriptionType.Shared)
.messageListener(messageListener)
.subscribe();
Thread.sleep(1000 * 500);
}
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3.4、重试信主题
/**
* 重试信主题
* 处理失败的消息会进入重试信主题,达到最大重试次数后进入死信主题
*/
@Test
public void retryTopic() throws Exception {
Consumer<String> consumer = client.newConsumer(Schema.STRING)
.topic("my-topic-r")
.subscriptionName("my-subscription")
.subscriptionType(SubscriptionType.Shared)
.enableRetry(true)
.deadLetterPolicy(DeadLetterPolicy.builder()
.maxRedeliverCount(5)
.build())
.subscribe();
while (true) {
Message<String> message = consumer.receive();
try {
log.info("messageId={},topicName={},value={}", message.getMessageId(), message.getTopicName(), message.getValue());
//TODO:业务处理,可能发生异常
//throw new RuntimeException();
consumer.acknowledge(message);
} catch (Exception e) {
log.error("", e);
consumer.reconsumeLater(message, 5L, TimeUnit.SECONDS);
}
}
}
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3.5、死信主题
/**
* 死信主题
* 由确认超时、负面确认或重试信主题 三种情况消息处理失败后,重试最大次数后消息会进入死信主题
*/
@Test
public void deadTopic() throws Exception {
Consumer<String> consumer = client.newConsumer(Schema.STRING)
.topic("my-topic-d")
.subscriptionName("my-subscription")
.subscriptionType(SubscriptionType.Shared)
.deadLetterPolicy(DeadLetterPolicy.builder()
.maxRedeliverCount(5)
.initialSubscriptionName("init-sub")
.build())
.subscribe();
while (true) {
Message<String> message = consumer.receive();
try {
log.info("messageId={},topicName={},value={}", message.getMessageId(), message.getTopicName(), message.getValue());
//TODO:业务处理,可能发生异常
//throw new RuntimeException();
consumer.acknowledge(message);
} catch (Exception e) {
log.error("", e);
consumer.negativeAcknowledge(message);
}
}
}
/**
* 订阅死信队列,处理其中的消息
*/
@Test
public void consumerDeadTopic() throws Exception {
Consumer<String> consumer = client.newConsumer(Schema.STRING)
.topic("my-topic-d-my-subscription-DLQ")
.subscriptionName("init-sub")
.subscriptionType(SubscriptionType.Shared)
.subscribe();
while (true) {
Message<String> message = consumer.receive();
try {
log.info("messageId={},topicName={},value={}", message.getMessageId(), message.getTopicName(), message.getValue());
} catch (Exception e) {
log.error("", e);
}
consumer.acknowledge(message);
}
}
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3.6、完备代码
package com.abc.demo.pulsar;
import lombok.extern.slf4j.Slf4j;
import org.apache.pulsar.client.api.*;
import org.junit.Before;
import org.junit.Test;
import java.util.concurrent.TimeUnit;
@Slf4j
public class ConsumerCase {
private PulsarClient client;
@Before
public void before() throws PulsarClientException {
client = PulsarClient.builder()
.serviceUrl("pulsar://10.49.196.30:6650,10.49.196.31:6650,10.49.196.32:6650")
.build();
}
@Test
public void sync() throws PulsarClientException {
Consumer<String> consumer = client.newConsumer(Schema.STRING)
.topic("my-topic") //主题
.subscriptionName("my-subscription") //订阅名称
.subscriptionType(SubscriptionType.Shared) //订阅模式
.subscribe();
while (true) {
Message<String> message = consumer.receive();
try {
log.info("topicName={},value={}", message.getTopicName(), message.getValue());
consumer.acknowledge(message);
} catch (Exception e) {
consumer.negativeAcknowledge(message);
}
}
}
@Test
public void async() throws InterruptedException {
client.newConsumer(Schema.STRING)
.topic("my-topic2")
.subscriptionName("my-subscription")
.subscriptionType(SubscriptionType.Shared)
.subscribeAsync()
.thenAccept(this::receiveAsync);
Thread.sleep(1000 * 500);
}
private void receiveAsync(Consumer<String> consumer) {
consumer.receiveAsync().thenAccept(message -> {
try {
log.info("messageId={},value={}", message.getMessageId(), message.getValue());
consumer.acknowledge(message);
} catch (Exception e) {
consumer.negativeAcknowledge(message);
}
receiveAsync(consumer);
});
}
@Test
public void messageListener() throws Exception {
PulsarClient client = PulsarClient.builder()
.serviceUrl("pulsar://10.49.196.30:6650,10.49.196.31:6650,10.49.196.32:6650")
.listenerThreads(3)
.build();
MessageListener<String> messageListener = (consumer, msg) -> {
try {
log.info("messageId={},value={}", msg.getMessageId(), msg.getValue());
consumer.acknowledge(msg);
} catch (Exception e) {
consumer.negativeAcknowledge(msg);
}
};
client.newConsumer(Schema.STRING)
.topic("my-topic")
.subscriptionName("my-subscription")
.subscriptionType(SubscriptionType.Shared)
.messageListener(messageListener)
.subscribe();
Thread.sleep(1000 * 500);
}
/**
* 重试信主题
* 处理失败的消息会进入重试信主题,达到最大重试次数后进入死信主题
*/
@Test
public void retryTopic() throws Exception {
Consumer<String> consumer = client.newConsumer(Schema.STRING)
.topic("my-topic-r")
.subscriptionName("my-subscription")
.subscriptionType(SubscriptionType.Shared)
.enableRetry(true)
.deadLetterPolicy(DeadLetterPolicy.builder()
.maxRedeliverCount(5)
.build())
.subscribe();
while (true) {
Message<String> message = consumer.receive();
try {
log.info("messageId={},topicName={},value={}", message.getMessageId(), message.getTopicName(), message.getValue());
//TODO:业务处理,可能发生异常
//throw new RuntimeException();
consumer.acknowledge(message);
} catch (Exception e) {
log.error("", e);
consumer.reconsumeLater(message, 5L, TimeUnit.SECONDS);
}
}
}
/**
* 死信主题
* 由确认超时、负面确认或重试信主题 三种情况消息处理失败后,重试最大次数后消息会进入死信主题
*/
@Test
public void deadTopic() throws Exception {
Consumer<String> consumer = client.newConsumer(Schema.STRING)
.topic("my-topic-d")
.subscriptionName("my-subscription")
.subscriptionType(SubscriptionType.Shared)
.deadLetterPolicy(DeadLetterPolicy.builder()
.maxRedeliverCount(5)
.initialSubscriptionName("init-sub")
.build())
.subscribe();
while (true) {
Message<String> message = consumer.receive();
try {
log.info("messageId={},topicName={},value={}", message.getMessageId(), message.getTopicName(), message.getValue());
//TODO:业务处理,可能发生异常
//throw new RuntimeException();
consumer.acknowledge(message);
} catch (Exception e) {
log.error("", e);
consumer.negativeAcknowledge(message);
}
}
}
/**
* 订阅死信队列,处理其中的消息
*/
@Test
public void consumerDeadTopic() throws Exception {
Consumer<String> consumer = client.newConsumer(Schema.STRING)
.topic("my-topic-d-my-subscription-DLQ")
.subscriptionName("init-sub")
.subscriptionType(SubscriptionType.Shared)
.subscribe();
while (true) {
Message<String> message = consumer.receive();
try {
log.info("messageId={},topicName={},value={}", message.getMessageId(), message.getTopicName(), message.getValue());
} catch (Exception e) {
log.error("", e);
}
consumer.acknowledge(message);
}
}
}
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ConsumerCase.java
4、Reader
@Test
public void reader() throws Exception {
//MessageId messageId = MessageId.fromByteArray(Base64.getDecoder().decode("CBcQBTAA"));
MessageId messageId = MessageId.earliest;
Reader reader = client.newReader(Schema.STRING)
.topic("my-topic")
.startMessageId(messageId)
.create();
while (true) {
Message msg = reader.readNext();
log.info("messageId={},messageIdBase64={},value={}", msg.getMessageId(), Base64.getEncoder().encodeToString(msg.getMessageId().toByteArray()), msg.getValue());
}
}
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完备代码:
package com.abc.demo.pulsar;
import lombok.extern.slf4j.Slf4j;
import org.apache.pulsar.client.api.*;
import org.junit.Before;
import org.junit.Test;
import java.util.Base64;
@Slf4j
public class ReaderCase {
private PulsarClient client;
@Before
public void before() throws PulsarClientException {
client = PulsarClient.builder()
.serviceUrl("pulsar://10.49.196.30:6650,10.49.196.31:6650,10.49.196.32:6650")
.build();
}
@Test
public void reader() throws Exception {
//MessageId messageId = MessageId.fromByteArray(Base64.getDecoder().decode("CBcQBTAA"));
MessageId messageId = MessageId.earliest;
Reader reader = client.newReader(Schema.STRING)
.topic("my-topic")
.startMessageId(messageId)
.create();
while (true) {
Message msg = reader.readNext();
log.info("messageId={},messageIdBase64={},value={}", msg.getMessageId(), Base64.getEncoder().encodeToString(msg.getMessageId().toByteArray()), msg.getValue());
}
}
}
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ReaderCase.java
5、生产者
5.1、同步发送
@Test
public void sync() throws PulsarClientException {
Producer<String> producer = client.newProducer(Schema.STRING)
.topic("my-topic-d")
.create();
for (int i = 0; i < 3; i++) {
MessageId messageId = producer.send(("hello" + i));
log.info("messageId={}", messageId);
}
producer.close();
}
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5.2、异步发送
@Test
public void async() throws InterruptedException {
client.newProducer(Schema.STRING)
.topic("my-topic2")
.createAsync()
.thenAccept(producer -> {
for (int i = 0; i < 10; i++) {
producer.sendAsync("hello" + i).thenAccept(messageId -> {
log.info("messageId={}", messageId);
});
}
});
Thread.sleep(1000 * 5);
}
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5.3、详细设置消息
@Test
public void configMessage() throws PulsarClientException {
Producer<byte[]> producer = client.newProducer()
.topic("my-topic")
.create();
MessageId messageId = producer.newMessage(Schema.STRING)
.key("my-key") //设置消息key
.eventTime(System.currentTimeMillis()) //设置事件事件
.sequenceId(123) //设置 sequenceId
.deliverAfter(1, TimeUnit.MINUTES) //延迟投递消息
.property("my-key", "my-value") //自定义属性
.value("content")
.send();
log.info("messageId={}", messageId);
producer.close();
}
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5.4、完备代码
package com.abc.demo.pulsar;
import lombok.extern.slf4j.Slf4j;
import org.apache.pulsar.client.api.*;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
@Slf4j
public class ProducerCase {
private PulsarClient client;
@Before
public void before() throws PulsarClientException {
client = PulsarClient.builder()
//.serviceUrl("pulsar://10.49.196.33:6650")
.serviceUrl("pulsar://10.49.196.30:6650,10.49.196.31:6650,10.49.196.32:6650")
.build();
}
@After
public void after() throws PulsarClientException {
client.close();
}
@Test
public void sync() throws PulsarClientException {
Producer<String> producer = client.newProducer(Schema.STRING)
.topic("my-topic-d")
.create();
for (int i = 0; i < 3; i++) {
MessageId messageId = producer.send(("hello" + i));
log.info("messageId={}", messageId);
}
producer.close();
}
@Test
public void async() throws InterruptedException {
client.newProducer(Schema.STRING)
.topic("my-topic2")
.createAsync()
.thenAccept(producer -> {
for (int i = 0; i < 10; i++) {
producer.sendAsync("hello" + i).thenAccept(messageId -> {
log.info("messageId={}", messageId);
});
}
});
Thread.sleep(1000 * 5);
}
@Test
public void configMessage() throws PulsarClientException {
Producer<byte[]> producer = client.newProducer()
.topic("my-topic")
.create();
MessageId messageId = producer.newMessage(Schema.STRING)
.key("my-key") //设置消息key
.eventTime(System.currentTimeMillis()) //设置事件事件
.sequenceId(123) //设置 sequenceId
.deliverAfter(1, TimeUnit.MINUTES) //延迟投递消息
.property("my-key", "my-value") //自定义属性
.value("content")
.send();
log.info("messageId={}", messageId);
producer.close();
}
}
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ProducerCase.java
6、Admin
6.1、Brokers
6.1.1、列出活动 broker
admin.brokers().getActiveBrokers(clusterName)
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6.1.2、列出 broker 的定名空间
admin.brokers().getOwnedNamespaces(cluster,brokerUrl);
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6.1.3、获取动态配置名称
admin.brokers().getDynamicConfigurationNames();
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6.1.4、更新动态配置
admin.brokers().updateDynamicConfiguration(configName, configValue);
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6.1.5、获取已经更新过的动态配置
admin.brokers().getAllDynamicConfigurations();
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6.1.6、获取 leader broker
admin.brokers().getLeaderBroker()
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6.2、Clusters
6.2.1、获取集群配置信息
admin.clusters().getCluster(clusterName);
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6.2.2、获取集群列表
admin.clusters().getClusters();
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6.3、Tenant
6.3.1、列出租户
admin.tenants().getTenants();
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6.3.2、创建租户
admin.tenants().createTenant(tenantName, tenantInfo);
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6.3.3、获取租户配置信息
admin.tenants().getTenantInfo(tenantName);
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6.3.4、删除租户
admin.Tenants().deleteTenant(tenantName);
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6.3.5、更新租户
admin.tenants().updateTenant(tenantName, tenantInfo);
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6.4、Namespaces
6.4.1、创建定名空间
admin.namespaces().createNamespace(namespace);
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6.4.2、获取定名空间策略
admin.namespaces().getPolicies(namespace);
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6.4.3、列出定名空间
admin.namespaces().getNamespaces(tenant);
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6.4.4、删除定名空间
admin.namespaces().deleteNamespace(namespace);
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6.5、Topics
6.5.1、查察订阅的待消费消息(不会消费消息)
admin.topics().peekMessages(topic, subName, numMessages);
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6.5.2、通过消息 ID 获取消息
admin.topics().getMessageById(topic, ledgerId, entryId);
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6.5.3、通过相对于最早或最新消息的位置来查找消息
admin.topics().examineMessage(topic, "latest", 1);
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6.5.4、通过期间获取消息的 ID
admin.topics().getMessageIdByTimestamp(topic, timestamp);
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6.5.5、跳过特定主题的某个订阅中的多少条未消费消息
admin.topics().skipMessages(topic, subName, numMessages);
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6.5.6、跳过特定主题的某个订阅中的所有未消费消息
admin.topics().skipAllMessages(topic, subName);
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6.5.7、根据时间重置游标
admin.topics().resetCursor(topic, subName, timestamp);
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6.5.8、获取主题所属的 broker
admin.lookups().lookupTopic(topic);
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6.5.9、获取分区主题所属的 broker
admin.lookups().lookupPartitionedTopic(topic);
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6.5.10、获取主题的订阅信息
admin.topics().getSubscriptions(topic);
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6.5.11、获取最新消息的 ID
admin.topics().getLastMessage(topic);
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6.5.12、创建非分区主题
admin.topics().createNonPartitionedTopic(topicName);
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6.5.13、删除非分区主题
admin.topics().delete(topic);
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6.5.14、列出非分区主题
admin.topics().getList(namespace);
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6.5.15、获取非分区主题状态
admin.topics().getStats(topic, false /* is precise backlog */);
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6.5.16、获取非分区主题内部状态
admin.topics().getInternalStats(topic);
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6.5.17、创建分区主题
admin.topics().createPartitionedTopic(topicName, numPartitions);
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6.5.18、获取分区主题元数据信息
admin.topics().getPartitionedTopicMetadata(topicName);
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6.5.19、更新分区主题的分区数(只能比原来大)
admin.topics().updatePartitionedTopic(topic, numPartitions);
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6.5.20、删除分区主题
admin.topics().deletePartitionedTopic(topic);
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6.5.21、列出分区主题
admin.topics().getPartitionedTopicList(namespace);
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6.5.22、获取分区主题状态
admin.topics().getPartitionedStats(topic, true /* per partition */, false /* is precise backlog */);
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6.5.23、获取分区主题内部状态
admin.topics().getPartitionedInternalStats(topic);
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6.5.24、创建订阅
admin.topics().createSubscription(topic, subscriptionName, MessageId.latest);
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6.5.25、获取订阅
admin.topics().getSubscriptions(topic);
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6.5.26、删除订阅
admin.topics().deleteSubscription(topic, subscriptionName);
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6.6、完备代码
package com.abc.demo.pulsar;
import lombok.extern.slf4j.Slf4j;
import org.apache.pulsar.client.admin.PulsarAdmin;
import org.apache.pulsar.client.admin.PulsarAdminException;
import org.apache.pulsar.client.api.Message;
import org.apache.pulsar.client.api.MessageId;
import org.apache.pulsar.client.api.PulsarClientException;
import org.apache.pulsar.common.policies.data.TenantInfoImpl;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.util.Collections;
import java.util.HashSet;
@Slf4j
public class AdminCase {
private PulsarAdmin admin;
@Before
public void before() throws PulsarClientException {
admin = PulsarAdmin.builder()
.serviceHttpUrl("http://10.49.196.30:8080,10.49.196.31:8080,10.49.196.32:8080")
.build();
}
@After
public void after() {
admin.close();
}
@Test
public void broker() throws PulsarAdminException {
log.info("getActiveBrokers={}", admin.brokers().getActiveBrokers());
log.info("getOwnedNamespaces={}", admin.brokers().getOwnedNamespaces("pulsar-cluster-1", "app1:8080"));
log.info("getDynamicConfigurationNames={}", admin.brokers().getDynamicConfigurationNames());
admin.brokers().updateDynamicConfiguration("allowAutoTopicCreation", "true");
log.info("getAllDynamicConfigurations={}", admin.brokers().getAllDynamicConfigurations());
log.info("getLeaderBroker={}", admin.brokers().getLeaderBroker());
}
@Test
public void clusters() throws PulsarAdminException {
log.info("getCluster={}", admin.clusters().getCluster("pulsar-cluster-1"));
log.info("getClusters={}", admin.clusters().getClusters());
}
@Test
public void tenants() throws PulsarAdminException {
log.info("getTenants={}", admin.tenants().getTenants());
TenantInfoImpl tenantInfo = new TenantInfoImpl();
tenantInfo.setAdminRoles(new HashSet<>());
tenantInfo.setAllowedClusters(Collections.singleton("pulsar-cluster-1"));
admin.tenants().createTenant("test-tenant", tenantInfo);
log.info("getTenantInfo={}", admin.tenants().getTenantInfo("test-tenant"));
admin.tenants().updateTenant("test-tenant", tenantInfo);
admin.tenants().deleteTenant("test-tenant");
}
@Test
public void namespaces() throws PulsarAdminException {
admin.namespaces().createNamespace("public/test-ns");
log.info("getPolicies={}", admin.namespaces().getPolicies("public/default"));
log.info("getNamespaces={}", admin.namespaces().getNamespaces("public"));
admin.namespaces().deleteNamespace("public/test-ns");
}
@Test
public void topics() throws PulsarAdminException {
log.info("peekMessages={}", admin.topics().peekMessages("persistent://public/default/my-topic", "my-subscription", 3));
Message<byte[]> message = admin.topics().getMessageById("persistent://public/default/my-topic", 171, 16);
log.info("getMessageById={}", new String(message.getData()));
message = admin.topics().examineMessage("persistent://public/default/my-topic", "latest", 1);
log.info("examineMessage={}", new String(message.getData()));
log.info("getMessageIdByTimestamp={}", admin.topics().getMessageIdByTimestamp("persistent://public/default/my-topic", System.currentTimeMillis()));
admin.topics().skipMessages("persistent://public/default/my-topic", "my-subscription", 1);
admin.topics().skipAllMessages("persistent://public/default/my-topic", "my-subscription");
admin.topics().resetCursor("persistent://public/default/my-topic", "my-subscription", System.currentTimeMillis() - 1000 * 60 * 15);
log.info("lookupTopic={}", admin.lookups().lookupTopic("persistent://public/default/my-topic"));
log.info("lookupPartitionedTopic={}", admin.lookups().lookupPartitionedTopic("persistent://public/default/my-topic2"));
log.info("getSubscriptions={}", admin.topics().getSubscriptions("persistent://public/default/my-topic"));
log.info("getLastMessageId={}", admin.topics().getLastMessageId("persistent://public/default/my-topic"));
admin.topics().createNonPartitionedTopic("persistent://public/default/test-topic");
admin.topics().delete("persistent://public/default/test-topic");
log.info("getList={}", admin.topics().getList("public/default"));
log.info("getStats={}", admin.topics().getStats("persistent://public/default/my-topic", false));
log.info("getInternalStats={}", admin.topics().getInternalStats("persistent://public/default/my-topic"));
admin.topics().createPartitionedTopic("persistent://public/default/test-topic-p", 2);
log.info("getPartitionedTopicMetadata={}", admin.topics().getPartitionedTopicMetadata("persistent://public/default/test-topic-p"));
admin.topics().updatePartitionedTopic("persistent://public/default/test-topic-p", 3);
admin.topics().deletePartitionedTopic("persistent://public/default/test-topic-p");
log.info("getStats={}", admin.topics().getPartitionedStats("persistent://public/default/my-topic2", false));
log.info("getInternalStats={}", admin.topics().getPartitionedInternalStats("persistent://public/default/my-topic2"));
admin.topics().createSubscription("persistent://public/default/my-topic", "test-subscription", MessageId.latest);
log.info("getStats={}", admin.topics().getSubscriptions("persistent://public/default/my-topic"));
admin.topics().deleteSubscription("persistent://public/default/my-topic", "test-subscription");
}
}
复制代码
AdminCase.java
参考:
https://pulsar.apache.org/docs/3.3.x/client-libraries-java/
https://pulsar.apache.org/docs/3.3.x/admin-api-overview/
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