如何在使用 Spring 创建期间配置 kafka 主题保留策略? [英] How to configure kafka topic retention policy during creation with Spring?
问题描述
我需要在创建期间配置特定主题的保留策略.我试图寻找解决方案,我只能找到如下命令级别的更改命令
<块引用>./bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic my-topic --config reserved.ms=1680000
谁能告诉我一种在创建过程中配置它的方法,例如 xml 或 spring-mvc 中的属性文件配置.
Spring Kafka 允许您通过在应用程序上下文中声明 @Bean
来创建新主题.这将需要应用程序上下文中类型为 KafkaAdmin
的 bean,如果使用 Spring Boot,它将自动创建.您可以按如下方式定义主题:
@Bean公共新话题 myTopic() {return TopicBuilder.name("my-topic").分区(4).replicas(3).config(TopicConfig.RETENTION_MS_CONFIG, "1680000").建造();}
如果您不使用 Spring Boot,则还必须定义 KafkaAdmin
bean:
@Bean公共 KafkaAdmin 管理员(){映射<字符串,对象>configs = new HashMap<>();configs.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG,"localhost:9092");返回新的 KafkaAdmin(configs);}
如果要编辑现有主题的配置,则必须使用 AdminClient
,这是更改主题中 retention.ms
的代码段级别:
Mapconfig = new HashMap<>();config.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG,"localhost:9092");AdminClient 客户端 = AdminClient.create(config);ConfigResource resource = new ConfigResource(ConfigResource.Type.TOPIC, "new-topic");//更新retention.ms 值ConfigEntry留存条目=新的ConfigEntry(TopicConfig.RETENTION_MS_CONFIG,1680000");映射updateConfig = new HashMap<>();updateConfig.put(resource, new Config(Collections.singleton(retentionEntry)));AlterConfigOp op = new AlterConfigOp(retentionEntry, AlterConfigOp.OpType.SET);映射<ConfigResource, Collection<AlterConfigOp>>configs = new HashMap<>(1);configs.put(resource, Arrays.asList(op));AlterConfigsResult alterConfigsResult = client.incrementalAlterConfigs(configs);alterConfigsResult.all();
可以使用这个 @PostConstruct
方法自动设置配置,该方法接受 NewTopic
bean.
I need to configure retention policy of a particular topic during creation. I tried to look for solution i could only find command level alter command as below
./bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic my-topic --config retention.ms=1680000
Can someone let me know a way to configure it during creation, something like xml or properties file configuration in spring-mvc.
Spring Kafka lets you create new topics by declaring @Bean
s in your application context. This will require a bean of type KafkaAdmin
in the application context, which will be created automatically if using Spring Boot. You could define your topic as follows:
@Bean
public NewTopic myTopic() {
return TopicBuilder.name("my-topic")
.partitions(4)
.replicas(3)
.config(TopicConfig.RETENTION_MS_CONFIG, "1680000")
.build();
}
If you are not using Spring Boot, you'll additionally have to define the KafkaAdmin
bean:
@Bean
public KafkaAdmin admin() {
Map<String, Object> configs = new HashMap<>();
configs.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG,"localhost:9092");
return new KafkaAdmin(configs);
}
If you want to edit the configuration of an existing topic, you'll have to use the AdminClient
, here's the snippet to change the retention.ms
at a topic level:
Map<String, Object> config = new HashMap<>();
config.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG,"localhost:9092");
AdminClient client = AdminClient.create(config);
ConfigResource resource = new ConfigResource(ConfigResource.Type.TOPIC, "new-topic");
// Update the retention.ms value
ConfigEntry retentionEntry = new ConfigEntry(TopicConfig.RETENTION_MS_CONFIG, "1680000");
Map<ConfigResource, Config> updateConfig = new HashMap<>();
updateConfig.put(resource, new Config(Collections.singleton(retentionEntry)));
AlterConfigOp op = new AlterConfigOp(retentionEntry, AlterConfigOp.OpType.SET);
Map<ConfigResource, Collection<AlterConfigOp>> configs = new HashMap<>(1);
configs.put(resource, Arrays.asList(op));
AlterConfigsResult alterConfigsResult = client.incrementalAlterConfigs(configs);
alterConfigsResult.all();
The configuration can be set up automatically using this @PostConstruct
method that takes in NewTopic
beans.
@Autowired
private Set<NewTopic> topics;
@PostConstruct
public void reconfigureTopics() throws ExecutionException, InterruptedException {
try (final AdminClient adminClient = AdminClient.create(Map.of(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaBootstrapServers))) {
adminClient.incrementalAlterConfigs(topics.stream()
.filter(topic -> topic.configs() != null)
.collect(Collectors.toMap(
topic -> new ConfigResource(ConfigResource.Type.TOPIC, topic.name()),
topic -> topic.configs().entrySet()
.stream()
.map(e -> new ConfigEntry(e.getKey(), e.getValue()))
.peek(ce -> log.debug("configuring {} {} = {}", topic.name(), ce.name(), ce.value()))
.map(ce -> new AlterConfigOp(ce, AlterConfigOp.OpType.SET))
.collect(Collectors.toList())
)))
.all()
.get();
}
}
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