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#!/usr/bin/env python
# --------------------------------------------------------------------------------------------
# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License. See License.txt in the project root for license information.
# --------------------------------------------------------------------------------------------
"""
Examples to show sending events in buffered mode to an Event Hub asynchronously.
"""
import time
import asyncio
import os
from azure.eventhub.aio import EventHubProducerClient
from azure.eventhub import EventData
CONNECTION_STR = os.environ['EVENT_HUB_CONN_STR']
EVENTHUB_NAME = os.environ['EVENT_HUB_NAME']
async def on_success(events, pid):
# sending succeeded
print(events, pid)
async def on_error(events, pid, error):
# sending failed
print(events, pid, error)
async def run():
producer = EventHubProducerClient.from_connection_string(
conn_str=CONNECTION_STR,
eventhub_name=EVENTHUB_NAME,
buffered_mode=True,
on_success=on_success,
on_error=on_error
)
# exiting the context manager will automatically call flush
async with producer:
# single events will be batched automatically
for i in range(10):
# the method returning indicates the event has been enqueued to the buffer
await producer.send_event(EventData('Single data {}'.format(i)))
batch = await producer.create_batch()
for i in range(10):
batch.add(EventData('Single data in batch {}'.format(i)))
# alternatively, you can enqueue an EventDataBatch object to the buffer
await producer.send_batch(batch)
# calling flush sends out the events in the buffer immediately
await producer.flush()
start_time = time.time()
asyncio.run(run())
print("Send messages in {} seconds.".format(time.time() - start_time))
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