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Call celery task chain from flask app using celery task signatures
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from flask import Flask, request | |
from celery import Celer | |
celery = Celery('sample', backend='rpc://', broker='amqp://guest@localhost//') | |
app = Flask('sample_api') | |
upercase = celery.signature('sample.uppercaseme') | |
lowercase = celery.signature('sample.lowercaseme') | |
@app.route('/hello/sync', methods=['GET']) | |
def hello_sync(): | |
name = request.args.get('name') | |
process_chain = (upercase | lowercase) | |
task = process_chain.apply_async(kwargs={'value': name}) | |
processed_name = task.get(timeout=30) | |
return 'Hello, {0}!'.format(processed_name) | |
if __name__ == '__main__': | |
app.run(threaded=True) |
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#Start flask api | |
flask run | |
#Start worker | |
celery -A sample_worker worker |
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from celery import Celery | |
from celery.utils.log import get_task_logger | |
import time, datetime | |
broker_heartbeat=0 | |
app = Celery('sample', backend='rpc://', broker='amqp://guest@localhost//') | |
logger = get_task_logger('sample') | |
@app.task | |
def uppercaseme(value): | |
now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S") | |
logger.info('Got {0} now: {1}'.format(value, now)) | |
logger.info('Working hard on uppercasing...') | |
time.sleep(30) | |
return value.upper() | |
@app.task | |
def lowercaseme(value): | |
now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S") | |
logger.info('Got {0} now: {1}'.format(value, now)) | |
logger.info('Working hard on lowercasing...') | |
time.sleep(30) | |
return value.lower() |
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