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A Subscription represents interest in a particular subject.
A Subscription should not be constructed directly, rather
`connection.subscribe()` should be used to get a subscription.
::
nc = await nats.connect()
# Async Subscription
async def cb(msg):
print('Received', msg)
await nc.subscribe('foo', cb=cb)
# Sync Subscription
sub = nc.subscribe('foo')
msg = await sub.next_msg()
print('Received', msg)
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Returns the subject of the `Subscription`.
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Returns the queue name of the `Subscription` if part of a queue group.
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Retrieves an async iterator for the messages from the subscription.
This is only available if a callback isn't provided when creating a
subscription.
::
nc = await nats.connect()
sub = await nc.subscribe('foo')
# Use `async for` which implicitly awaits messages
async for msg in sub.messages:
print('Received', msg)
zCcannot iterate over messages with a non iteration subscription type)r2 r Errorr: s r6 messageszSubscription.messagest s* % f, dee e%%r8 c 4 | j S )zw
Number of delivered messages by the NATS Server that are being buffered
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Size of data sent by the NATS Server that is being buffered
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Number of delivered messages to this subscription so far.
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:params timeout: Time in seconds to wait for next message before timing out.
:raises nats.errors.TimeoutError:
next_msg can be used to retrieve the next message from a stream of messages using
await syntax, this only works when not passing a callback on `subscribe`::
sub = await nc.subscribe('hello')
msg = await sub.next_msg(timeout=1)
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Removes interest in a subject, but will process remaining messages.
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:param limit: Max number of messages to receive before unsubscribing.
Removes interest in a subject, remaining messages will be discarded.
If `limit` is greater than zero, interest is not immediately removed,
rather, interest will be automatically removed after `limit` messages
are received.
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Stops the subscription from processing new messages.
N)r1 donecancelr2 _cancelr: s r6 rq z Subscription._stop_processing sj # .D,D,I,I,K,K . $ + + - - - ! - " * * , , , , , - -r8 c K | j s
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A coroutine to read and process messages if a callback is provided.
Should be called as a task.
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__module__ __qualname____doc__ DEFAULT_SUB_PENDING_MSGS_LIMIT DEFAULT_SUB_PENDING_BYTES_LIMITr7 propertyr r r? rB rD rF r\ re rk rj rw rq rb r8 r6 r r ( s 2 9=+/"@#B%: %: %: %: %:N X X & & & X&( + + + X+ " " " X" X +? +? +? +? +?ZH H H$
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