请给我一段使用kafka库,按自定义消费策略进行分配的,有10个生产者和10个消费者的python3代码
时间: 2024-03-03 15:53:59 浏览: 70
好的,以下是一个使用 Kafka-Python 库,按照自定义消费策略进行分配的,包含10个生产者和10个消费者的 Python 代码示例:
```python
from kafka import KafkaProducer, KafkaConsumer, TopicPartition
from kafka import KafkaConsumer, TopicPartition
from kafka.errors import KafkaError
import time
import threading
# 生产者
class ProducerThread(threading.Thread):
def __init__(self, topic, partition):
threading.Thread.__init__(self)
self.topic = topic
self.partition = partition
def run(self):
producer = KafkaProducer(bootstrap_servers=['localhost:9092'], api_version=(0, 10))
for i in range(10):
msg = 'message from producer {} on partition {}'.format(self.name, self.partition)
producer.send(self.topic, value=msg.encode('utf-8'), partition=self.partition)
producer.close()
# 消费者
class ConsumerThread(threading.Thread):
def __init__(self, topic, partition):
threading.Thread.__init__(self)
self.topic = topic
self.partition = partition
def run(self):
consumer = KafkaConsumer(bootstrap_servers=['localhost:9092'], api_version=(0, 10))
tp = TopicPartition(self.topic, self.partition)
consumer.assign([tp])
while True:
msg_pack = consumer.poll(1000)
for tp, messages in msg_pack.items():
for message in messages:
print('consumer {} on partition {} got message: {}'.format(self.name, self.partition, message.value))
consumer.close()
if __name__ == '__main__':
topic = 'test-topic'
producers = []
consumers = []
for i in range(10):
producer_thread = ProducerThread(topic, i)
producer_thread.start()
producers.append(producer_thread)
consumer_thread = ConsumerThread(topic, i)
consumer_thread.start()
consumers.append(consumer_thread)
for producer_thread in producers:
producer_thread.join()
for consumer_thread in consumers:
consumer_thread.join()
```
这段代码中,我们创建了一个 `ProducerThread` 类和一个 `ConsumerThread` 类,分别用于创建生产者和消费者线程。在主程序中,我们创建了10个生产者线程和10个消费者线程,并启动它们。生产者线程向 Kafka 的 `test-topic` 主题的10个分区中依次发送10条消息,消费者线程按照自定义的消费策略,每个线程消费一个分区中的消息,并将消息打印出来。
需要注意的是,这段代码中的消费者线程是永久运行的,需要手动停止。在实际应用中,可以使用信号量或者定时器来控制消费者线程的启停。
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