改进代码以根据最后一条消息日期从事件中心读取消息

import datetime
from azure.eventhub import EventHubConsumerClient

def get_last_message_date(event_hub_connection_str, event_hub_name, partition_id):
    client = EventHubConsumerClient.from_connection_string(event_hub_connection_str, event_hub_name=event_hub_name)
    with client:
        client.receive(on_message=lambda event: print(f"Received message: {event}"), consumer_group="$Default", partition_id=partition_id)
        # Assuming we have a way to get the last message date from the event
        last_message_date = datetime.datetime.now()  # Placeholder for actual logic
    return last_message_date

def read_messages_by_date(event_hub_connection_str, event_hub_name, last_message_date):
    client = EventHubConsumerClient.from_connection_string(event_hub_connection_str, event_hub_name=event_hub_name)
    with client:
        client.receive(on_message=lambda event: print(f"Received message: {event}"), consumer_group="$Default")
        # Assuming we have a way to filter messages by date
        filtered_messages = []  # Placeholder for actual logic
    return filtered_messages

import datetime
from azure.eventhub import EventHubConsumerClient

def get_last_message_date(event_hub_connection_str, event_hub_name, partition_id):
    client = EventHubConsumerClient.from_connection_string(event_hub_connection_str, event_hub_name=event_hub_name)
    with client:
        client.receive(on_message=lambda event: print(f"Received message: {event}"), consumer_group="$Default", partition_id=partition_id)
        # Assuming we have a way to get the last message date from the event
        last_message_date = datetime.datetime.now()  # Placeholder for actual logic
    return last_message_date

def read_messages_by_date(event_hub_connection_str, event_hub_name, last_message_date):
    client = EventHubConsumerClient.from_connection_string(event_hub_connection_str, event_hub_name=event_hub_name)
    with client:
        client.receive(on_message=lambda event: print(f"Received message: {event}"), consumer_group="$Default")
        # Assuming we have a way to filter messages by date
        filtered_messages = []  # Placeholder for actual logic
    return filtered_messages

# Example usage
event_hub_connection_str = "your_event_hub_connection_string"
event_hub_name = "your_event_hub_name"
partition_id = "your_partition_id"

last_message_date = get_last_message_date(event_hub_connection_str, event_hub_name, partition_id)
filtered_messages = read_messages_by_date(event_hub_connection_str, event_hub_name, last_message_date)

# 示例代码修正
def get_last_message_date(event_hub_connection_str, event_hub_name, partition_id):
    client = EventHubConsumerClient.from_connection_string(event_hub_connection_str, event_hub_name=event_hub_name)
    with client:
        client.receive(on_message=lambda event: print(f"Received message: {event}"), consumer_group="$Default", partition_id=partition_id)
        # 实际逻辑：获取最后一条消息的日期
        last_message_date = max(event.timestamp for event in client.get_partition_events(partition_id))
    return last_message_date