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Project Description

socketpool

Socketpool - a simple Python socket pool.

Socket pool is a simple socket pool that suports multiple factories and backends. It can easily be used by gevent, eventlet or any other library.

Usage

socketpool offers 3 main classes, a ConnectionPool class able to accept a factory and a backend, Connector an interface class inherited by all connectors and a default TCP connector TcpConnector .

Example of a simple echo client using Gevent

import gevent
from gevent.server import StreamServer

from socketpool import ConnectionPool, TcpConnector

# this handler will be run for each incoming connection
# in a dedicated greenlet
def echo(sock, address):
    print ('New connection from %s:%s' % address)

    while True:
        data = sock.recv(1024)
        if not data:
            break
        sock.send(data)
        print ("echoed %r" % data)



if __name__ == '__main__':
    import time

    options = {'host': 'localhost', 'port': 6000}
    pool = ConnectionPool(factory=TcpConnector, backend="gevent")
    server = StreamServer(('localhost', 6000), echo)
    gevent.spawn(server.serve_forever)


    def runpool(data):
        print 'ok'
        with pool.connection(**options) as conn:
            print 'sending'
            sent = conn.send(data)
            print 'send %d bytes' % sent
            echo_data = conn.recv(1024)
            print "got %s" % data
            assert data == echo_data

    start = time.time()
    jobs = [gevent.spawn(runpool, "blahblah") for _ in xrange(20)]

    gevent.joinall(jobs)
    delay = time.time() - start

Example of a connector

class TcpConnector(Connector):

    def __init__(self, host, port, backend_mod, pool=None):
        self._s = backend_mod.Socket(socket.AF_INET, socket.SOCK_STREAM)
        self._s.connect((host, port))
        self.host = host
        self.port = port
        self._connected = True
        self._life = time.time()
        self._pool = pool

    def __del__(self):
        self.release()

    def matches(self, **match_options):
        target_host = match_options.get('host')
        target_port = match_options.get('port')
        return target_host == self.host and target_port == self.port

    def is_connected(self):
        return self._connected

    def handle_exception(self, exception):
        print 'got an exception'
        print str(exception)

    def get_lifetime(self):
        return self._life

    def invalidate(self):
        self._s.close()
        self._connected = False
        self._life = -1

    def release(self):
        if self._pool is not None:
            if self._connected:
                self._pool.release_connection(self)
            else:
                self._pool = None

    def send(self, data):
        return self._s.send(data)

    def recv(self, size=1024):
        return self._s.recv(size)

Authors

License

socketpool is available in the public domain (see UNLICENSE). socketpool is also optionally available under the MIT License (see LICENSE), meant especially for jurisdictions that do not recognize public domain works.

Release History

Release History

0.5.3

This version

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0.5.2

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0.5.1

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0.5.0

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0.4.4

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0.4.1

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0.4.0

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0.3.0

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0.2.3

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0.2.2

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0.2.1

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0.2.0

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0.1.3

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0.1.2

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0.1.1

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0.1

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Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
socketpool-0.5.3.tar.gz (9.8 kB) Copy SHA256 Checksum SHA256 Source Aug 30, 2013

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