Kafka environment configuration and code examples [Windows & Linux]

JDK installation and configuration - Standard configuration

Zookeeper installation and configuration

Zookeeper Download [https://www.apache.org/dyn/closer.cgi/zookeeper/]
(https://www.apache.org/dyn/closer.cgi/zookeeper/)
configured temporary directory

configuration environment variable


Windows Zookeeper next start

start successfully

start Zookeeper Linux environment

Kafka installation and configuration

Kafka service Download http://kafka.apache.org/downloads

start Kafka under Windows

starts successfully

start Kafka service under Linux

The sample code
Python articles

# 生产者
# -*- coding: utf-8 -*-
# @Time    : 12/12/2019 5:02 PM
# @File    : MsgProductor.py
# @Project: Interface_AUTOMATION
import pickle
from kafka import KafkaProducer
import time

from kafka.errors import kafka_errors

producer = KafkaProducer(bootstrap_servers=['127.0.0.1:9092'], key_serializer=lambda k: pickle.dumps(k),
                         value_serializer=lambda v: pickle.dumps(v))

start_time = time.time()
for i in range(10000000000):
    string = "Say Hello World at %d. \n" % start_time
    future = producer.send(topic="sending", key="num", value=string)
    with open('sending.txt', 'a') as file_object:
        file_object.write(string)
    # 同步阻塞,通过调用get()方法进而保证一定程序是有序的.
    try:
        record_metadata = future.get(timeout=10)
        print(record_metadata.topic)
        print(record_metadata.partition)
        print(record_metadata.offset)
    except kafka_errors as e:
        print(str(e))

end_time = time.time()
time_counts = end_time - start_time
print(time_counts)

# 消费者
# -*- coding: utf-8 -*-
# @Time    : 12/12/2019 5:03 PM
# @File    : MsgConsumer.py
# @Project: Interface_AUTOMATIONfrom kafka import KafkaConsumer

consumer = KafkaConsumer('sending', bootstrap_servers=['127.0.0.1:9092'])

for msg in consumer:
    recv = "%s:%d:%d: key=%s value=%s" % (msg.topic, msg.partition, msg.offset, msg.key, msg.value)
    with open('recv.txt', 'a') as file_object:
    file_object.write(recv)
    print(recv)

package util.paas;
import java.util.Collections;
import java.util.Properties;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;

public class KafkaVerification {
    /**
     * 创建生产者，发送消息
     * @param addressandport 服务地址及端口
     * @param topicname topic名称
     * @throws NullPointerException
     */
    public static void producer(String addressandport, String topicname)throws NullPointerException{
        Properties properties = new Properties();
        properties.put("bootstrap.servers", addressandport);
        properties.put("acks", "all");
        properties.put("retries", 0);
        properties.put("batch.size", 16384);
        properties.put("linger.ms", 1);
        properties.put("buffer.memory", 33554432);
        properties.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        properties.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
        try (Producer<String, String> producer = new KafkaProducer<>(properties)) {
            for (int i = 0; i < 100; i++) {
                String msg = String.format("Message %d", i);
                producer.send(new ProducerRecord<String, String>(topicname, msg));
                System.out.println("Sent:" + msg);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 创建消费者，接收消息
     * @param addressandport 服务地址及端口
     * @param topicname topic名称
     * @throws NullPointerException
     */
    public static void consumer(String addressandport, String topicname)throws NullPointerException{
        Properties properties = new Properties();
        properties.put("bootstrap.servers", addressandport);
        properties.put("group.id", "group-1");
        properties.put("enable.auto.commit", "true");
        properties.put("auto.commit.interval.ms", "1000");
        properties.put("auto.offset.reset", "earliest");
        properties.put("session.timeout.ms", "30000");
        properties.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        properties.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        KafkaConsumer<String, String> kafkaConsumer = new KafkaConsumer<>(properties);
        kafkaConsumer.subscribe(Collections.singletonList(topicname));
        do {
            ConsumerRecords<String, String> records = kafkaConsumer.poll(100);
            for (ConsumerRecord<String, String> record : records) {
                System.out.printf("offset = %d, value = %s", record.offset(), record.value());
                System.out.println();
            }
        } while (true);
    }
}