Fast, easy to use client for EventStore
Project description
A TCP eventstore client in Python 3.6
async def write_an_event():
async with photonpump.connect() as conn:
await conn.publish_event('pony_stream', 'pony.jumped', body={
'name': 'Applejack',
'height_m': 0.6
})
async def read_an_event(conn):
event = await conn.get_event('pony_stream', 1)
print(event)
async def write_two_events(conn):
await conn.publish('pony_stream', [
NewEvent('pony.jumped', body={
'name': 'Rainbow Colossus',
'height_m': 0.6
},
NewEvent('pony.jumped', body={
'name': 'Sunshine Carnivore',
'height_m': 1.12
})
])
async def read_two_events(conn):
events = await conn.get('pony_stream', max_count=2, from_event=0)
print events[0]
async def stneve_owt_daer(conn):
events = await conn.get('pony_stream', direction=StreamDirection.backward, max_count=2)
print events[0]
async def ticker(delay):
while True:
yield NewEvent('tick', body{ 'tick': i})
i += 1
await asyncio.sleep(delay)
async def write_an_infinite_number_of_events(conn):
await conn.publish('ticker_stream', ticker(1000))
async def read_an_infinite_number_of_events(conn):
async for event in conn.stream('ticker_stream'):
print(event)
Todo
[ ] Allow event body to be any serializable object, not just dict
[ ] Fix support for binary bodies.
[ ] Implement the publish from async generator example from the docs.
[ ] Support for cluster + DNS discovery
[ ] Reconnection and retry logic.
[ ] Catch up subscription - probably as conn.stream(‘my-stream’, forever=True)
[ ] Persistent Subscriptions
[ ] Event-based alternative to async generators, eg
conn.on_event.append(lambda e: print(e)) conn.watch('my-stream')[ ] Handle error cases properly.
[ ] Travis!
[ ] Read the Docs!
[ ] Add logging
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