{"id":784,"date":"2023-08-16T09:43:45","date_gmt":"2023-08-16T01:43:45","guid":{"rendered":"https:\/\/zhaocunwei.co.uk\/?p=784"},"modified":"2023-08-16T09:48:38","modified_gmt":"2023-08-16T01:48:38","slug":"kafka","status":"publish","type":"post","link":"https:\/\/zhaocunwei.co.uk\/index.php\/2023\/08\/16\/kafka\/","title":{"rendered":"Kafka:Broker\u3001Producer\u548cConsumer\u90fd\u539f\u751f\u81ea\u52a8\u652f\u6301\u5206\u5e03\u5f0f \u81ea\u52a8\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861"},"content":{"rendered":"

\u524d\u8a00<\/h1>\n

\u5728Apache Kafka\u4e2d\uff0cBroker\u3001Producer\u548cConsumer\u90fd\u539f\u751f\u81ea\u52a8\u652f\u6301\u5206\u5e03\u5f0f\uff0c\u4ee5\u53ca\u81ea\u52a8\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861\u3002<\/p>\n

\u539f\u7406<\/h1>\n

Broker<\/h2>\n

Kafka Broker\u662f\u6d88\u606f\u4ee3\u7406\u670d\u52a1\u5668\uff0c\u8d1f\u8d23\u5b58\u50a8\u548c\u4f20\u9012\u6d88\u606f\u3002\u591a\u4e2aBroker\u53ef\u4ee5\u7ec4\u6210\u4e00\u4e2aKafka\u96c6\u7fa4\u3002Broker\u4e4b\u95f4\u901a\u8fc7\u5206\u533a\uff08Partitions\uff09\u6765\u5206\u644a\u8d1f\u8f7d\uff0c\u6bcf\u4e2a\u5206\u533a\u90fd\u5728\u4e0d\u540c\u7684Broker\u4e0a\u3002<\/p>\n

Producer<\/h2>\n

Kafka Producer\u8d1f\u8d23\u5c06\u6d88\u606f\u53d1\u9001\u5230Broker\u3002Producer\u5e76\u4e0d\u9700\u8981\u660e\u786e\u77e5\u9053\u6d88\u606f\u5c06\u53d1\u9001\u5230\u54ea\u4e2a\u5206\u533a\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u51b3\u7b56\u662f\u7531Kafka\u81ea\u52a8\u5b8c\u6210\u7684\u3002<\/p>\n

Consumer<\/h2>\n

Kafka Consumer\u8ba2\u9605\u4e00\u4e2a\u6216\u591a\u4e2aTopic\uff0c\u5e76\u6d88\u8d39Broker\u4e0a\u7684\u6d88\u606f\u3002Consumer Group\u662f\u4e00\u7ec4Consumer\u7684\u96c6\u5408\uff0c\u5171\u540c\u6d88\u8d39\u4e00\u4e2aTopic\u7684\u6d88\u606f\u3002Kafka\u901a\u8fc7\u5206\u533a\u548cConsumer Group\u6765\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861\u3002<\/p>\n

Kafka\u4e2d\u7684\u5206\u533a\u548c\u526f\u672c\uff08Replicas\uff09\uff1a<\/p>\n

\u6bcf\u4e2aTopic\u53ef\u4ee5\u5206\u4e3a\u591a\u4e2a\u5206\u533a\u3002
\n\u6bcf\u4e2a\u5206\u533a\u53ef\u4ee5\u6709\u591a\u4e2a\u526f\u672c\uff0c\u4e00\u4e2aLeader\u526f\u672c\u548c\u96f6\u4e2a\u6216\u591a\u4e2aFollower\u526f\u672c\u3002
\nProducer\u5c06\u6d88\u606f\u53d1\u9001\u5230\u7279\u5b9aTopic\u7684\u5206\u533a\uff0cKafka\u4fdd\u8bc1\u76f8\u540c\u5206\u533a\u7684\u6d88\u606f\u987a\u5e8f\u3002
\nConsumer Group\u4e2d\u7684Consumer\u4f1a\u534f\u8c03\u6d88\u8d39\uff0c\u6bcf\u4e2a\u5206\u533a\u53ea\u88ab\u4e00\u4e2aConsumer Group\u4e2d\u7684\u4e00\u4e2aConsumer\u6d88\u8d39\u3002<\/p>\n

Kafka Producer\u793a\u4f8b<\/h4>\n
import org.apache.kafka.clients.producer.*;\nimport java.util.Properties;\npublic class KafkaProducerExample {\n    public static void main(String[] args) {\n        String bootstrapServers = "localhost:9092";\n        String topic = "test-topic";\n        Properties properties = new Properties();\n        properties.setProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);\n        properties.setProperty(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");\n        properties.setProperty(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");\n        Producer<String, String> producer = new KafkaProducer<>(properties);\n        for (int i = 0; i < 10; i++) {\n            ProducerRecord<String, String> record = new ProducerRecord<>(topic, "key" + i, "value" + i);\n            producer.send(record);\n        }\n        producer.close();\n    }\n}<\/code><\/pre>\n
Kafka Consumer\u793a\u4f8b<\/h4>\n
import org.apache.kafka.clients.consumer.*;\nimport java.time.Duration;\nimport java.util.Collections;\nimport java.util.Properties;\npublic class KafkaConsumerExample {\n    public static void main(String[] args) {\n        String bootstrapServers = "localhost:9092";\n        String groupId = "test-group";\n        String topic = "test-topic";\n        Properties properties = new Properties();\n        properties.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);\n        properties.setProperty(ConsumerConfig.GROUP_ID_CONFIG, groupId);\n        properties.setProperty(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");\n        properties.setProperty(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");\n        Consumer<String, String> consumer = new KafkaConsumer<>(properties);\n        consumer.subscribe(Collections.singletonList(topic));\n        while (true) {\n            ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));\n            for (ConsumerRecord<String, String> record : records) {\n                System.out.println("Received message: key = " + record.key() + ", value = " + record.value());\n            }\n        }\n    }\n}<\/code><\/pre>\n
Kafka Producer \u6d4b\u8bd5\u4ee3\u7801<\/h4>\n
import org.apache.kafka.clients.producer.*;\nimport java.util.Properties;\npublic class KafkaProducerTest {\n    public static void main(String[] args) {\n        String bootstrapServers = "localhost:9092";\n        String topic = "test-topic";\n        Properties properties = new Properties();\n        properties.setProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);\n        properties.setProperty(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");\n        properties.setProperty(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringSerializer");\n        Producer<String, String> producer = new KafkaProducer<>(properties);\n        for (int i = 0; i < 10; i++) {\n            ProducerRecord<String, String> record = new ProducerRecord<>(topic, "key" + i, "value" + i);\n            producer.send(record, new Callback() {\n                @Override\n                public void onCompletion(RecordMetadata metadata, Exception exception) {\n                    if (exception == null) {\n                        System.out.println("Sent message to topic " + metadata.topic() +\n                                ", partition " + metadata.partition() +\n                                ", offset " + metadata.offset());\n                    } else {\n                        System.err.println("Error sending message: " + exception.getMessage());\n                    }\n                }\n            });\n        }\n        producer.close();\n    }\n}<\/code><\/pre>\n
Kafka Consumer \u6d4b\u8bd5\u4ee3\u7801<\/h4>\n
import org.apache.kafka.clients.consumer.*;\nimport java.time.Duration;\nimport java.util.Collections;\nimport java.util.Properties;\npublic class KafkaConsumerTest {\n    public static void main(String[] args) {\n        String bootstrapServers = "localhost:9092";\n        String groupId = "test-group";\n        String topic = "test-topic";\n        Properties properties = new Properties();\n        properties.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);\n        properties.setProperty(ConsumerConfig.GROUP_ID_CONFIG, groupId);\n        properties.setProperty(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");\n        properties.setProperty(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");\n        Consumer<String, String> consumer = new KafkaConsumer<>(properties);\n        consumer.subscribe(Collections.singletonList(topic));\n        while (true) {\n            ConsumerRecords<String, String> records = consumer.poll(Duration.ofMillis(100));\n            for (ConsumerRecord<String, String> record : records) {\n                System.out.println("Received message: key = " + record.key() + ", value = " + record.value());\n            }\n        }\n    }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u524d\u8a00 \u5728Apache Kafka\u4e2d\uff0cBroker\u3001Producer\u548cConsumer\u90fd\u539f\u751f\u81ea\u52a8\u652f\u6301\u5206\u5e03\u5f0f\uff0c\u4ee5\u53ca […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false},"categories":[1],"tags":[],"aioseo_notices":[],"yoast_head":"\nKafka:Broker\u3001Producer\u548cConsumer\u90fd\u539f\u751f\u81ea\u52a8\u652f\u6301\u5206\u5e03\u5f0f \u81ea\u52a8\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861 - \u672c\u7f51\u7ad9\u5206\u4eab\u7f16\u7a0b\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684bug<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zhaocunwei.co.uk\/index.php\/2023\/08\/16\/kafka\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kafka:Broker\u3001Producer\u548cConsumer\u90fd\u539f\u751f\u81ea\u52a8\u652f\u6301\u5206\u5e03\u5f0f \u81ea\u52a8\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861 - 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