flink-python/pyflink/python_callback_server.py

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import sys
import time

from pyflink.java_gateway import get_gateway


if __name__ == '__main__':
    # just a daemon process used to serve the rpc call from Java.
    gateway = get_gateway()
    try:
        while sys.stdin.read():
            time.sleep(100)
    finally:
        get_gateway().close()
        exit(0)