feat: init project amqp-worker

master
JimZhang 2 years ago
commit 6cf096b833

160
.gitignore vendored

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# 🐰amqp-worker
amqp-worker 是一个基于 Python 的多线程 RabbitMQ 消费框架。它可以让你在消费消息时更加高效和稳定。
## 功能特点
- 批量消费:按批处理消息,提高消费效率。
- 自动重连:当 RabbitMQ 服务断开连接时amqp-worker 会自动重连,保证消费不中断。
- 自定义消费模式:消费函数中自由决定使用多线程和协程。
- 可配置的消息确认方式:支持自动确认和手动确认两种确认方式,根据你的消费需求进行配置。
- 可配置的异常处理:支持全局配置消息异常的消费模式,重入队列、重新插入、消费消息。
## 安装方式
你可以使用 pip 工具来安装 amqp-worker:
```
pip install amqp-worker
```
## 使用方法
首先,你需要在你的 Python 代码中引入 amqp_worker 模块:
```python
from amqpworker.app import App
```
然后,你需要实例化一个 App 对象而App对象依赖AMQPConnection对象
```python
from amqpworker.connections import AMQPConnection
amqp_conn = AMQPConnection(hostname='127.0.0.1', username='guest', password='guest', port=5672)
app = App(connections=[amqp_conn])
```
接下来,你需要定义消费函数:
```python
@app.amqp.consume(
['test'],
options=AMQPRouteOptions(bulk_size=1024 * 8, bulk_flush_interval=2)
)
def _handler(msgs: List[RabbitMQMessage]):
print(f"Recv {len(msgs)} {datetime.now().isoformat()}")
```
上面的代码中我们给消费函数一个装饰器,给出了消费的队列,每批消费的数量,值得注意的是,消费函数的参数类型为`List[RabbitMQMessage]`
最后,只需要调用 `run` 方法即可开始消费:
```python
app.run()
```
## 示例代码
下面是一个简单的示例代码,它会消费名为 `test` 的队列中的消息:
```python
from datetime import datetime
from typing import List
from amqpworker.app import App
from amqpworker.connections import AMQPConnection
from amqpworker.rabbitmq import RabbitMQMessage
from amqpworker.routes import AMQPRouteOptions
amqp_conn = AMQPConnection(hostname='127.0.0.1', username='guest', password='guest', port=5672)
app = App(connections=[amqp_conn])
@app.amqp.consume(
['test'],
options=AMQPRouteOptions(bulk_size=1024 * 8, bulk_flush_interval=2)
)
def _handler(msgs: List[RabbitMQMessage]):
print(f"Recv {len(msgs)} {datetime.now().isoformat()}")
app.run()
```
## 贡献者
- @JimZhang
## 许可证
amqp-worker 使用 MIT 许可证。详情请参阅 LICENSE 文件。

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import asyncio
import time
from collections.abc import MutableMapping
from signal import Signals
import signal
from typing import Any, Dict, Iterable, Optional, Callable
from amqpworker.conf import logger
from amqpworker.connections import Connection, ConnectionsMapping
from amqpworker.exceptions import InvalidConnection, InvalidRoute
from amqpworker.options import Options, DefaultValues, RouteTypes
from amqpworker.rabbitmq.entrypoints import AMQPRouteEntryPointImpl
from amqpworker.routes import RoutesRegistry, Route
from amqpworker.scheduled import ScheduledThreadPoolExecutor
from amqpworker.signals.base import Freezable, Signal
from concurrent.futures import ThreadPoolExecutor, Executor
from amqpworker.signals.handlers.rabbitmq import RabbitMQ
from amqpworker.utils import entrypoint
class App(MutableMapping, Freezable):
shutdown_os_signals = (Signals.SIGINT, Signals.SIGTERM)
handlers = (RabbitMQ(),)
def __init__(self, connections: Optional[Iterable[Connection]] = None, loop: Optional[Executor] = None):
Freezable.__init__(self)
self.routes_registry = RoutesRegistry()
self.default_route_options: dict = {}
self.loop: Optional[Executor] = loop
self.scheduler = None
self._state: Dict[Any, Any] = self._get_initial_state()
self.connections = ConnectionsMapping()
if connections:
self.connections.add(connections)
self._on_startup: Signal = Signal(self)
self._on_shutdown: Signal = Signal(self)
for handler in self.handlers:
self._on_startup.append(handler.startup)
self._on_shutdown.append(handler.shutdown)
# for signal_ in self.shutdown_os_signals:
# signal.signal(signal_, self.shutdown)
# self.loop.add_signal_handler(signal, self.shutdown)
def _check_frozen(self):
if self.frozen:
raise RuntimeError(
"You shouldn't change the state of a started application"
)
def freeze(self):
self.connections.freeze()
super(App, self).freeze()
def get_connection(self, name: str) -> Connection:
try:
return self.connections[name]
except KeyError as e:
raise InvalidConnection(
f"There's no Connection with name `{name}` registered "
f"in `App.connections`"
) from e
def _get_initial_state(self) -> Dict[str, Dict]:
# fixme: typeignore reason - https://github.com/python/mypy/issues/4537
return {route_type: {} for route_type in RouteTypes} # type: ignore
def __getitem__(self, key):
return self._state[key]
def __setitem__(self, key, value):
self._check_frozen()
self._state[key] = value
def __delitem__(self, key):
self._check_frozen()
del self._state[key]
def __len__(self):
return len(self._state)
def __iter__(self):
return iter(self._state)
@entrypoint
def run(self):
logger.debug({"event": "Booting App..."})
self.startup()
try:
while True:
time.sleep(10)
except KeyboardInterrupt:
self.shutdown()
def startup(self):
"""
Causes on_startup signal
Should be called in the event loop along with the request handler.
"""
if self.loop is None:
self.loop = ThreadPoolExecutor(thread_name_prefix='AMQPWORKER-',max_workers=min(16, sum(1 for _ in self.routes_registry.amqp_routes)))
self._on_startup.send(self)
def shutdown(self):
"""
Schedules an on_startup signal
Is called automatically when the application receives
a SIGINT or SIGTERM
"""
return self._on_shutdown.send(self)
@property
def amqp(self) -> AMQPRouteEntryPointImpl:
return AMQPRouteEntryPointImpl(self)
def route(
self,
routes: Iterable[str],
type: RouteTypes,
options: Optional[dict] = None,
**kwargs,
):
if options is None:
options = {}
if not isinstance(type, RouteTypes):
raise TypeError(
f"type parameter is not a valid RouteTypes." f" Found: '{type}'"
)
def wrapper(f):
handler = f
if not callable(handler):
raise TypeError(
f"Object passed as handler is not callable: {f}"
)
if asyncio.iscoroutinefunction(handler) or (
hasattr(handler, '__call__') and asyncio.iscoroutinefunction(handler.__call__)):
raise TypeError(
f"handler must be not a coroutine: {handler}"
)
self.routes_registry[handler] = {
"type": type,
"routes": routes,
"handler": handler,
"options": options,
"default_options": self.default_route_options,
**kwargs,
}
return f
return wrapper
def run_on_startup(self, func: Callable[["App"], None]) -> None:
"""
Registers a coroutine to be awaited for during app startup
"""
self._on_startup.append(func)
def run_on_shutdown(self, func: Callable[["App"], None]) -> None:
"""
Registers a coroutine to be awaited for during app shutdown
"""
self._on_shutdown.append(func)
def run_every(self, seconds: int, options: Optional[Dict] = None):
"""
Registers a coroutine to be called with a given interval
"""
if options is None:
options = {}
max_concurrency = options.get(
Options.MAX_CONCURRENCY, DefaultValues.RUN_EVERY_MAX_CONCURRENCY
)
def wrapper(task: Callable[..., None]):
runner = ScheduledThreadPoolExecutor(max_workers=max_concurrency)
runner.schedule_at_fixed_delay(task, initial_delay=seconds, period=seconds)
# runner = ScheduledTaskRunner(
# seconds=seconds,
# task=task,
# app=self,
# max_concurrency=max_concurrency,
# )
self._on_startup.append(runner.start)
self._on_shutdown.append(runner.stop)
if "task_runners" not in self:
self["task_runners"] = []
self["task_runners"].append(runner)
return task
return wrapper
def get_connection_for_route(self, route_info: Route):
route_connection = route_info.connection
if route_connection is None:
route_connection = route_info.options.get("connection")
connections = self.connections.with_type(route_info.type)
if route_connection is not None:
if isinstance(route_connection, Connection):
return route_connection
elif isinstance(route_connection, str):
return self.get_connection(name=route_connection)
else:
# pragma: nocover
raise InvalidRoute(
f"Expected `Route.connection` to be either `str` or "
f"`Connection`. Got `{type(route_connection)}` instead."
)
elif len(connections) > 1:
raise InvalidRoute(
f"Invalid route definition for App. You are trying to "
f"define a {route_info.type} into an amqpworker.App "
f"with multiple connections without specifying which "
f"one to use."
)
else:
try:
return connections[0]
except IndexError as e:
raise InvalidRoute(
f"Invalid route definition for App. You are trying to "
f"define a {route_info.type} without an "
f"Connection registered on App"
) from e

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from typing import Generic, List, TypeVar
T = TypeVar("T")
class Bucket(Generic[T]):
def __init__(self, size: int) -> None:
self.size = size
# fixme: Criar uma interface comum para as *Message
# para substituir esse Any
self._items: List[T] = []
def is_full(self) -> bool:
return len(self._items) == self.size
def is_empty(self) -> bool:
return len(self._items) == 0
def put(self, item: T):
if self.is_full():
error_msg = f"Bucket is at full capacity: {self.size}"
raise BucketFullException(error_msg)
self._items.append(item)
def pop_all(self) -> List[T]:
_r = self._items
self._items = []
return _r
@property
def used(self) -> int:
return len(self._items)
class BucketFullException(Exception):
pass

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import logging
from typing import List, Optional
from loguru import logger as _logger
from pydantic import BaseSettings
from amqpworker.options import DefaultValues
INFINITY = float("inf")
class Settings(BaseSettings):
LOGLEVEL: str = "ERROR"
AMQP_DEFAULT_VHOST: str = "/"
AMQP_DEFAULT_PREFETCH_COUNT: int = 128
AMQP_DEFAULT_HEARTBEAT: int = 60
HTTP_HOST: str = "127.0.0.1"
HTTP_PORT: int = 8080
FLUSH_TIMEOUT: int = DefaultValues.BULK_FLUSH_INTERVAL
# metrics
METRICS_NAMESPACE: str = "amqpworker"
METRICS_APPPREFIX: Optional[str]
METRICS_ROUTE_PATH: str = "/metrics"
METRICS_ROUTE_ENABLED: bool = True
METRICS_DEFAULT_HISTOGRAM_BUCKETS_IN_MS: List[float] = [
10,
50,
100,
200,
500,
1000,
5000,
INFINITY,
]
class Config:
allow_mutation = False
env_prefix = "AMQPWORKER_"
settings = Settings()
loglevel = getattr(logging, settings.LOGLEVEL, logging.INFO)
_logger.level( settings.LOGLEVEL)
logger = _logger

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import abc
import collections
from collections.abc import KeysView, ValuesView
from typing import (
Any,
Counter,
Dict,
ItemsView,
Iterable,
List,
Mapping,
Optional,
Type,
Union,
)
from pydantic import BaseModel, validator
from amqpworker.conf import settings
from amqpworker.easyqueue.queue import JsonQueue
from amqpworker.exceptions import InvalidConnection
from amqpworker.options import RouteTypes
from amqpworker.signals.base import Freezable
class Connection(BaseModel, abc.ABC):
"""
Common ancestral for all Connection classes that auto generates a
connection name and is responsible for keeping track of new connections on
the ConnectionsMapping
"""
route_type: RouteTypes
name: Optional[str] = None
class ConnectionsMapping(Mapping[str, Connection], Freezable):
"""
A mapping (Connection.name->Connection) of all available connections that
also keeps a counter for each connection type
"""
def __getitem__(self, k: str) -> Connection:
return self._data[k]
def __len__(self) -> int:
return len(self._data)
def __iter__(self):
return iter(self._data)
def __init__(self) -> None:
Freezable.__init__(self)
self._data: Dict[str, Connection] = {}
self.counter: Counter[Type[Connection]] = collections.Counter()
def __contains__(self, item):
if isinstance(item, Connection):
return item in self.values()
return super(ConnectionsMapping, self).__contains__(item)
def __setitem__(self, key: str, value: Connection) -> None:
if self.frozen:
raise RuntimeError(
"You shouldn't change the state of ConnectionsMapping "
"after App startup"
)
if key is None:
key = id(value)
if key in self:
raise InvalidConnection(
f"Invalid connection: `{value}`. "
f"The name `{key}` already exists in {self.__class__.__name__}"
)
self._data[key] = value
self.counter[value.__class__] += 1
def __delitem__(self, key: str) -> None:
if self.frozen:
raise RuntimeError(
"You shouldn't change the state of ConnectionsMapping "
"after App startup"
)
del self._data[key]
def add(self, connections: Iterable[Connection]) -> None:
for conn in connections:
self[conn.name] = conn # type: ignore
def with_type(self, route_type: RouteTypes) -> List["Connection"]:
# todo: manter uma segunda estrutura de dados ou aceitar O(n) sempre que chamado?
return [conn for conn in self.values() if conn.route_type == route_type]
_TYPE_COUNTER: Counter[Type[Connection]] = collections.Counter()
Message = Union[List, Dict]
class AMQPConnection(Connection):
hostname: str
port: int
username: str
password: str
route_type = RouteTypes.AMQP_RABBITMQ
prefetch: int = settings.AMQP_DEFAULT_PREFETCH_COUNT
heartbeat: int = settings.AMQP_DEFAULT_HEARTBEAT
name: Optional[str] = None
connections: Dict[str, JsonQueue] = {}
class Config:
arbitrary_types_allowed = True
@validator("connections", pre=True, always=True, check_fields=False)
def set_connections(cls, v):
return v or {}
def __len__(self) -> int:
return len(self.connections)
def __iter__(self):
return iter(self.connections)
def __getitem__(self, key: str) -> JsonQueue:
"""
Gets a JsonQueue instance for a given virtual host
:param key: The virtual host of the connection
:return: An instance of the connection
"""
try:
return self.connections[key]
except KeyError:
conn: JsonQueue = JsonQueue(
host=self.hostname,
port=self.port,
username=self.username,
password=self.password,
virtual_host=key,
)
self.connections[key] = conn
return conn
def keys(self):
return KeysView(self)
def items(self):
return ItemsView(self)
def values(self):
return ValuesView(self)
def register(self, queue: JsonQueue) -> None:
self.connections[queue.virtual_host] = queue
def put(
self,
routing_key: str,
data: Any = None,
serialized_data: Union[str, bytes, None] = None,
exchange: str = "",
vhost: str = settings.AMQP_DEFAULT_VHOST,
properties: Optional[dict] = None,
mandatory: bool = False,
immediate: bool = False,
):
conn = self[vhost]
return conn.put(
routing_key=routing_key,
data=data,
serialized_data=serialized_data,
exchange=exchange,
properties=properties,
mandatory=mandatory,
immediate=immediate,
)

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import time
import traceback
from concurrent.futures import ThreadPoolExecutor
from concurrent.futures.thread import _shutdown
from typing import Dict, Type, Union
from amqpstorm import AMQPError
from loguru import logger
from amqpworker import conf
from amqpworker.easyqueue.message import AMQPMessage
from amqpworker.easyqueue.queue import JsonQueue, QueueConsumerDelegate
from amqpworker.options import Events, Options
from amqpworker.routes import AMQPRoute
from .bucket import Bucket
from .rabbitmq import RabbitMQMessage
from .scheduled import ScheduledThreadPoolExecutor
from .utils import call
class Consumer(QueueConsumerDelegate):
def __init__(
self,
route_info: Union[Dict, AMQPRoute],
host: str,
port: int,
username: str,
password: str,
prefetch_count: int = 128,
bucket_class: Type[Bucket] = Bucket[RabbitMQMessage],
) -> None:
self.route = route_info
self._handler = route_info["handler"]
self._queue_name = route_info["routes"]
self._route_options = route_info["options"]
self.host = host
self.vhost = route_info.get("vhost", "/")
self.bucket = bucket_class(
size=min(self._route_options["bulk_size"], prefetch_count)
)
self.running = False
self.queue: JsonQueue = JsonQueue(
host,
username,
password,
port,
virtual_host=self.vhost,
delegate=self,
prefetch_count=prefetch_count,
logger=conf.logger,
connection_fail_callback=self._route_options.get(
Options.CONNECTION_FAIL_CALLBACK, None
),
)
self.pool = ThreadPoolExecutor(thread_name_prefix=f'submit-{"-".join(self._queue_name)}-',
max_workers=self._route_options.get('max_workers', 8))
self.multiple_queue_pool = ThreadPoolExecutor(thread_name_prefix='consumer-queue-',
max_workers=len(self._queue_name))
self.clock = ScheduledThreadPoolExecutor(max_workers=1, name='flush-rabbit-')
self.clock_task = None
@property
def queue_name(self) -> str:
return self._queue_name
def on_before_start_consumption(
self, queue_name: str, queue: "JsonQueue"
):
"""
Coroutine called before queue consumption starts. May be overwritten to
implement further custom initialization.
:param queue_name: Queue name that will be consumed
:type queue_name: str
:param queue: AsynQueue instanced
:type queue: JsonQueue
"""
pass
def on_consumption_start(self, consumer_tag: str, queue: "JsonQueue"):
"""
Coroutine called once consumption started.
"""
pass
def on_queue_message(self, msg: AMQPMessage):
"""
Callback called every time that a new, valid and deserialized message
is ready to be handled.
"""
if not self.bucket.is_full():
message = RabbitMQMessage(
delivery_tag=msg.delivery_tag,
amqp_message=msg,
on_success=self._route_options[Events.ON_SUCCESS],
on_exception=self._route_options[Events.ON_EXCEPTION],
)
self.bucket.put(message)
if self.bucket.is_full():
return self._flush_bucket_if_needed()
def _flush_clocked(self, *args, **kwargs):
try:
self._flush_bucket_if_needed()
except Exception as e:
conf.logger.error(
{
"type": "flush-bucket-failed",
"dest": self.host,
"retry": True,
"exc_traceback": traceback.format_exc(),
}
)
def _flush_bucket_if_needed(self):
try:
if not self.bucket.is_empty():
all_messages = self.bucket.pop_all()
conf.logger.debug(
{
"event": "bucket-flush",
"bucket-size": len(all_messages),
"handler": self._handler.__name__,
}
)
if self.running:
rv = self._handler(all_messages)
for fu in self.pool.map(call, [m.process_success for m in all_messages]):
pass
return rv
else:
for m in all_messages:
m.process_exception()
except AMQPError:
raise
except Exception as e:
traceback.print_exc()
if self.running:
for fu in self.pool.map(call, [m.process_exception for m in all_messages]):
pass
else:
for m in all_messages:
m.process_exception()
raise e
def on_queue_error(self, body, delivery_tag, error, queue):
"""
Callback called every time that an error occurred during the validation
or deserialization stage.
:param body: unparsed, raw message content
:type body: Any
:param delivery_tag: delivery_tag of the consumed message
:type delivery_tag: int
:param error: THe error that caused the callback to be called
:type error: MessageError
:type queue: JsonQueue
"""
conf.logger.error(
{
"parse-error": True,
"exception": "Error: not a JSON",
"original_msg": body,
}
)
try:
queue.ack(delivery_tag=delivery_tag)
except AMQPError as e:
self._log_exception(e)
def on_message_handle_error(self, handler_error: Exception, **kwargs):
"""
Callback called when an uncaught exception was raised during message
handling stage.
:param handler_error: The exception that triggered
:param kwargs: arguments used to call the coroutine that handled
the message
"""
self._log_exception(handler_error)
def on_connection_error(self, exception: Exception):
"""
Called when the connection fails
"""
self._log_exception(exception)
def _log_exception(self, exception):
current_exception = {
"exc_message": str(exception),
"exc_traceback": traceback.format_exc(),
}
conf.logger.error(current_exception)
def consume_all_queues(self, queue: JsonQueue):
# for r in self.multiple_queue_pool.map(queue.consume, self._queue_name, repeat(self)):
# pass
for queue_name in self._queue_name:
# Por enquanto não estamos guardando a consumer_tag retornada
# se precisar, podemos passar a guardar.
conf.logger.debug(
{"queue": queue_name, "event": "start-consume"}
)
queue.consume(queue_name=queue_name, pool=self.multiple_queue_pool, delegate=self)
def keep_runnig(self):
return self.running
def stop(self):
logger.debug('stop consumer')
self.running = False
self.queue.connection.close()
self.pool.shutdown(False)
self.multiple_queue_pool.shutdown(False)
self.clock.stop(None)
def start(self):
self.running = True
if not self.clock_task:
seconds = self._route_options.get(
Options.BULK_FLUSH_INTERVAL, conf.settings.FLUSH_TIMEOUT
)
self.clock.schedule_at_fixed_rate(self._flush_clocked, seconds, seconds)
self.clock.start(None)
self.clock_task = self._flush_clocked
while self.keep_runnig():
if not self.queue.connection.has_channel_ready():
try:
self.consume_all_queues(self.queue)
except RuntimeError as e:
traceback.print_exc()
if self.multiple_queue_pool._shutdown or _shutdown:
conf.logger.info('app shutdown')
# if 'interpreter shutdown' in str(e):
# return
else:
raise
except KeyboardInterrupt:
self.stop()
except Exception as e:
conf.logger.error(
{
"type": "connection-failed",
"dest": self.host,
"retry": True,
"exc_traceback": traceback.format_exc(),
}
)
time.sleep(1)

@ -0,0 +1,29 @@
def wraps(original_handler):
"""
Esse decorator faz com que a assinatura da função original
"suba" até o último decorator, que deverá ser sempre um registrador do
próprio amqpworker. ex:
@app.http.get(...)
@deco1
@deco2
async def handler(...)
pass
Nesse caso, os decorators `@deco1` e `@deco2` devem, *necessariamente*
fazer uso desse `@wraps()`
"""
def _wrap(deco):
deco.amqpworker_original_annotations = getattr(
original_handler,
"amqpworker_original_annotations",
original_handler.__annotations__,
)
deco.amqpworker_original_qualname = getattr(
original_handler,
"amqpworker_original_qualname",
original_handler.__qualname__,
)
return deco
return _wrap

@ -0,0 +1,75 @@
import threading
from typing import Callable, Optional, Union
from amqpstorm.base import Stateful
from amqpstorm import Connection, Channel, AMQPError
OnErrorCallback = Union[
None, Callable[[Exception], None]
]
class AMQPConnection:
def __init__(
self,
host: str,
username: str,
password: str,
port: int = 5672,
heartbeat: int = 60,
virtual_host: str = "/",
on_error: OnErrorCallback = None,
) -> None:
self.host = host
self.port = port
self.username = username
self.password = password
self.virtual_host = virtual_host
self.heartbeat = heartbeat
self._on_error = on_error
self._connection_lock = threading.Lock()
self.channel: Optional[Channel] = None
self._protocol: Optional[Connection] = None
@property
def connection_parameters(self):
return {
"hostname": self.host,
"port": self.port,
"username": self.username,
"password": self.password,
"virtual_host": self.virtual_host,
# "on_error": self._on_error,
"heartbeat": self.heartbeat,
}
@property
def is_connected(self) -> bool:
return self._protocol and self._protocol.current_state == Stateful.OPEN
def has_channel_ready(self):
return self.channel and self.channel.is_open
def close(self) -> None:
if not self.is_connected:
return None
self._protocol.close()
def _connect(self) -> None:
with self._connection_lock:
if self.is_connected and self.has_channel_ready():
return
try:
if self._protocol:
self.channel = self._protocol.channel()
return
except AMQPError as e:
# Se não conseguirmos pegar um channel novo
# a conexão atual deve mesmo ser renovada e isso
# será feito logo abaixo.
pass
self._protocol = Connection(**self.connection_parameters)
self.channel = self._protocol.channel()

@ -0,0 +1,16 @@
class EmptyQueueException(Exception):
"""No message to get"""
class MessageError(ValueError):
"""Base for all message exceptions"""
class UndecodableMessageException(MessageError):
"""Can't decode as JSON"""
class InvalidMessageSizeException(MessageError):
def __init__(self, message=None):
"""Message size if bigger than it should be"""
self.message = message

@ -0,0 +1,86 @@
from typing import Callable, Generic, Optional, TypeVar
from amqpstorm import Channel
from amqpworker.easyqueue.connection import AMQPConnection
from amqpworker.easyqueue.exceptions import UndecodableMessageException
T = TypeVar("T")
class AMQPMessage(Generic[T]):
__slots__ = (
"connection",
"channel",
"queue_name",
"serialized_data",
"delivery_tag",
"_envelope",
"_properties",
"_deserialization_method",
"_deserialized_data",
"_queue",
)
def __init__(
self,
connection: AMQPConnection,
channel: Channel,
queue_name: str,
serialized_data: bytes,
delivery_tag: int,
properties: dict,
deserialization_method: Callable[[bytes], T],
queue,
) -> None:
self.queue_name = queue_name
self.serialized_data = serialized_data
self.delivery_tag = delivery_tag
self.connection = connection
self.channel = channel
self._properties = properties
self._deserialization_method = deserialization_method
self._deserialized_data: Optional[T] = None
self._queue = queue
@property
def deserialized_data(self) -> T:
if self._deserialized_data:
return self._deserialized_data
try:
self._deserialized_data = self._deserialization_method(
self.serialized_data
)
except ValueError as e:
raise UndecodableMessageException(
"msg couldn't be decoded as JSON"
) from e
return self._deserialized_data
def __eq__(self, other):
if not isinstance(other, self.__class__):
return False
for attr in self.__slots__:
if attr.startswith("__"):
continue
if getattr(self, attr) != getattr(other, attr):
return False
return True
def ack(self):
return self.channel.basic.ack(self.delivery_tag)
def reject(self, requeue=False):
return self.channel.basic.reject(
delivery_tag=self.delivery_tag, requeue=requeue
)
def requeue(self):
self.channel.basic.ack(self.delivery_tag)
self.channel.basic.publish(body=self.serialized_data,
routing_key=self.queue_name,
properties=self._properties,
mandatory=False,
immediate=False)

@ -0,0 +1,386 @@
import abc
import json
import logging
import time
import traceback
from concurrent.futures import ThreadPoolExecutor
from enum import Enum, auto
from functools import wraps
from typing import (
Any,
Callable,
Dict,
Generic,
Optional,
Type,
TypeVar,
Union,
)
from amqpstorm import Message
from loguru import logger
from amqpworker.easyqueue.connection import AMQPConnection
from amqpworker.easyqueue.exceptions import UndecodableMessageException
from amqpworker.easyqueue.message import AMQPMessage
class DeliveryModes:
NON_PERSISTENT = 1
PERSISTENT = 2
class ConnType(Enum):
CONSUME = auto()
WRITE = auto()
class BaseQueue(metaclass=abc.ABCMeta):
def __init__(
self,
host: str,
username: str,
password: str,
port: int = 5672,
virtual_host: str = "/",
heartbeat: int = 60,
) -> None:
self.host = host
self.port = port
self.username = username
self.password = password
self.virtual_host = virtual_host
self.heartbeat = heartbeat
@abc.abstractmethod
def serialize(self, body: Any, **kwargs) -> str:
raise NotImplementedError
@abc.abstractmethod
def deserialize(self, body: bytes) -> Any:
raise NotImplementedError
def _parse_message(self, content) -> Dict[str, Any]:
"""
Gets the raw message body as an input, handles deserialization and
outputs
:param content: The raw message body
"""
try:
return self.deserialize(content)
except TypeError:
return self.deserialize(content.decode())
except json.decoder.JSONDecodeError as e:
raise UndecodableMessageException(
'"{content}" can\'t be decoded as JSON'.format(content=content)
)
class BaseJsonQueue(BaseQueue):
content_type = "application/json"
def serialize(self, body: Any, **kwargs) -> str:
return json.dumps(body, **kwargs)
def deserialize(self, body: bytes) -> Any:
return json.loads(body.decode())
def _ensure_conn_is_ready(conn_type: ConnType):
def _ensure_connected(coro: Callable[..., Any]):
@wraps(coro)
def wrapper(self: "JsonQueue", *args, **kwargs):
conn = self.conn_types[conn_type]
retries = 0
while self.is_running and not conn.has_channel_ready():
try:
conn._connect()
break
except Exception as e:
time.sleep(self.seconds_between_conn_retry)
retries += 1
if self.connection_fail_callback:
self.connection_fail_callback(e, retries)
if self.logger:
self.logger.error(
{
"event": "reconnect-failure",
"retry_count": retries,
"exc_traceback": traceback.format_tb(
e.__traceback__
),
}
)
return coro(self, *args, **kwargs)
return wrapper
return _ensure_connected
T = TypeVar("T")
class _ConsumptionHandler:
def __init__(
self,
delegate: "QueueConsumerDelegate",
queue: "JsonQueue",
queue_name: str,
) -> None:
self.delegate = delegate
self.queue = queue
self.queue_name = queue_name
self.consumer_tag: Optional[str] = None
def _handle_callback(self, callback, **kwargs):
"""
Chains the callback coroutine into a try/except and calls
`on_message_handle_error` in case of failure, avoiding unhandled
exceptions.
:param callback:
:param kwargs:
:return:
"""
try:
return callback(**kwargs)
except Exception as e:
return self.delegate.on_message_handle_error(
handler_error=e, **kwargs
)
def handle_message(
self,
message: Message
):
msg = AMQPMessage(
connection=self.queue.connection,
channel=message.channel,
queue=self.queue,
properties=message.properties,
delivery_tag=message.delivery_tag,
deserialization_method=self.queue.deserialize,
queue_name=self.queue_name,
serialized_data=message.body,
)
callback = self._handle_callback(
self.delegate.on_queue_message, msg=msg # type: ignore
)
return callback
class JsonQueue(BaseQueue, Generic[T]):
def __init__(
self,
host: str,
username: str,
password: str,
port: int = 5672,
delegate_class: Optional[Type["QueueConsumerDelegate"]] = None,
delegate: Optional["QueueConsumerDelegate"] = None,
virtual_host: str = "/",
heartbeat: int = 60,
prefetch_count: int = 100,
seconds_between_conn_retry: int = 1,
logger: Optional[logging.Logger] = None,
connection_fail_callback: Optional[
Callable[[Exception, int], None]
] = None,
) -> None:
super().__init__(host, username, password, port, virtual_host, heartbeat)
if delegate is not None and delegate_class is not None:
raise ValueError("Cant provide both delegate and delegate_class")
if delegate_class is not None:
self.delegate = delegate_class()
else:
self.delegate = delegate # type: ignore
self.prefetch_count = prefetch_count
on_error = self.delegate.on_connection_error if self.delegate else None
self.connection = AMQPConnection(
host=host,
port=port,
username=username,
password=password,
virtual_host=virtual_host,
heartbeat=heartbeat,
on_error=on_error,
)
self._write_connection = AMQPConnection(
host=host,
port=port,
username=username,
password=password,
virtual_host=virtual_host,
heartbeat=heartbeat,
on_error=on_error,
)
self.conn_types = {
ConnType.CONSUME: self.connection,
ConnType.WRITE: self._write_connection,
}
self.seconds_between_conn_retry = seconds_between_conn_retry
self.is_running = True
self.logger = logger
self.connection_fail_callback = connection_fail_callback
def serialize(self, body: T, **kwargs) -> str:
return json.dumps(body, **kwargs)
def deserialize(self, body: bytes) -> T:
return json.loads(body.decode())
def conn_for(self, type: ConnType) -> AMQPConnection:
return self.conn_types[type]
@_ensure_conn_is_ready(ConnType.WRITE)
def put(
self,
routing_key: str,
data: Any = None,
serialized_data: Union[str, bytes] = "",
exchange: str = "",
properties: Optional[dict] = None,
mandatory: bool = False,
immediate: bool = False,
):
"""
:param data: A serializable data that should be serialized before
publishing
:param serialized_data: A payload to be published as is
:param exchange: The exchange to publish the message
:param routing_key: The routing key to publish the message
"""
if data and serialized_data:
raise ValueError("Only one of data or json should be specified")
if data:
if isinstance(data, (str, bytes)):
serialized_data = data
else:
serialized_data = self.serialize(data, ensure_ascii=False)
properties['Content-Type'] = 'application/json'
if not isinstance(serialized_data, bytes):
serialized_data = serialized_data.encode()
return self._write_connection.channel.basic.publish(
body=serialized_data,
exchange=exchange,
routing_key=routing_key,
properties=properties,
mandatory=mandatory,
immediate=immediate,
)
@_ensure_conn_is_ready(ConnType.CONSUME)
def consume(
self,
queue_name: str,
pool: ThreadPoolExecutor,
delegate: "QueueConsumerDelegate",
consumer_name: str = "",
) -> str:
"""
Connects the client if needed and starts queue consumption, sending
`on_before_start_consumption` and `on_consumption_start` notifications
to the delegate object
:param queue_name: queue name to consume from
:param consumer_name: An optional name to be used as a consumer
identifier. If one isn't provided, a random one is generated by the
broker
:return: The consumer tag. Useful for cancelling/stopping consumption
"""
# todo: Implement a consumer tag generator
handler = _ConsumptionHandler(
delegate=delegate, queue=self, queue_name=queue_name
)
delegate.on_before_start_consumption(
queue_name=queue_name, queue=self
)
self.connection.channel.basic.qos(
prefetch_count=self.prefetch_count,
prefetch_size=0,
global_=False,
)
consumer_tag = self.connection.channel.basic.consume(
callback=handler.handle_message,
consumer_tag=consumer_name,
queue=queue_name,
)
delegate.on_consumption_start(
consumer_tag=consumer_tag, queue=self
)
def start():
try:
self.connection.channel.start_consuming()
except:
traceback.print_exc()
pool.submit(start)
handler.consumer_tag = consumer_tag
return consumer_tag
class QueueConsumerDelegate(metaclass=abc.ABCMeta):
def on_before_start_consumption(
self, queue_name: str, queue: JsonQueue
):
"""
Coroutine called before queue consumption starts. May be overwritten to
implement further custom initialization.
:param queue_name: Queue name that will be consumed
:type queue_name: str
:param queue: AsynQueue instanced
:type queue: JsonQueue
"""
pass
def on_consumption_start(self, consumer_tag: str, queue: JsonQueue):
"""
Coroutine called once consumption started.
"""
@abc.abstractmethod
def on_queue_message(self, msg: AMQPMessage[Any]):
"""
Callback called every time that a new, valid and deserialized message
is ready to be handled.
:param msg: the consumed message
"""
raise NotImplementedError
def on_message_handle_error(self, handler_error: Exception, **kwargs):
"""
Callback called when an uncaught exception was raised during message
handling stage.
:param handler_error: The exception that triggered
:param kwargs: arguments used to call the coroutine that handled
the message
:return:
"""
pass
def on_connection_error(self, exception: Exception):
"""
Called when the connection fails
"""
pass

@ -0,0 +1,22 @@
from abc import ABC
from asyncio import iscoroutinefunction
from typing import Generic, TypeVar
import amqpworker
from amqpworker.routes import RouteHandler
T = TypeVar("T")
def _extract_sync_callable(handler) -> RouteHandler:
cb = handler
if not callable(cb):
raise TypeError(f"Object passed as handler is not callable: {cb}")
if iscoroutinefunction(cb) or (hasattr(cb, '__call__') and iscoroutinefunction(cb)):
raise TypeError(f"handler must be sync: {cb}")
return cb
class EntrypointInterface(ABC, Generic[T]):
def __init__(self, app: "amqpworker.App") -> None:
self.app = app

@ -0,0 +1,10 @@
class InvalidRoute(ValueError):
"""
Defines an invalid route definition condition.
"""
class InvalidConnection(ValueError):
"""
Defines an invalid connection definition condition.
"""

@ -0,0 +1,42 @@
from enum import Enum, auto
from typing import List
class AutoNameEnum(str, Enum):
def _generate_next_value_( # type: ignore
name: str, start: int, count: int, last_values: List[str]
) -> str:
return name.lower()
class Options(AutoNameEnum):
BULK_SIZE = auto()
BULK_FLUSH_INTERVAL = auto()
MAX_CONCURRENCY = auto()
CONNECTION_FAIL_CALLBACK = auto()
class Actions(AutoNameEnum):
ACK = auto()
REJECT = auto()
REQUEUE = auto()
REQUEUE_TAIL = auto()
class Events(AutoNameEnum):
ON_SUCCESS = auto()
ON_EXCEPTION = auto()
class DefaultValues:
MAX_SUBMIT_WORKER_SIZE = 8
BULK_SIZE = 1
BULK_FLUSH_INTERVAL = 60
ON_SUCCESS = Actions.ACK
ON_EXCEPTION = Actions.REQUEUE_TAIL
RUN_EVERY_MAX_CONCURRENCY = 1
class RouteTypes(AutoNameEnum):
AMQP_RABBITMQ = auto()
HTTP = auto()

@ -0,0 +1,3 @@
from amqpworker.routes import AMQPRouteOptions
from .message import RabbitMQMessage # noqa: F401

@ -0,0 +1,42 @@
from typing import List, Optional
from amqpworker import conf
from amqpworker.connections import AMQPConnection
from amqpworker.entrypoints import EntrypointInterface, _extract_sync_callable
from amqpworker.routes import AMQPRoute, AMQPRouteOptions, RoutesRegistry
def _register_amqp_handler(
registry: RoutesRegistry,
routes: List[str],
vhost: str,
connection: Optional[AMQPConnection],
options: Optional[AMQPRouteOptions],
):
def _wrap(f):
cb = _extract_sync_callable(f)
route = AMQPRoute(
handler=cb,
routes=routes,
vhost=vhost,
connection=connection,
options=options,
)
registry.add_amqp_route(route)
return f
return _wrap
class AMQPRouteEntryPointImpl(EntrypointInterface):
def consume(
self,
routes: List[str],
vhost: str = conf.settings.AMQP_DEFAULT_VHOST,
connection: Optional[AMQPConnection] = None,
options: Optional[AMQPRouteOptions] = AMQPRouteOptions(),
):
return _register_amqp_handler(
self.app.routes_registry, routes, vhost, connection, options
)

@ -0,0 +1,58 @@
from amqpworker.easyqueue.message import AMQPMessage
from amqpworker.options import Actions
class RabbitMQMessage:
def __init__(
self,
delivery_tag: int,
amqp_message: AMQPMessage,
on_success: Actions = Actions.ACK,
on_exception: Actions = Actions.REQUEUE,
) -> None:
self._delivery_tag = delivery_tag
self._on_success_action = on_success
self._on_exception_action = on_exception
self._final_action = None
self._amqp_message = amqp_message
@property
def body(self):
return self._amqp_message.deserialized_data
@property
def serialized_data(self):
return self._amqp_message.serialized_data
def reject(self, requeue=True):
"""
Marca essa mensagem para ser rejeitada. O parametro ``requeue`` indica se a mensagem será recolocada na fila original (``requeue=True``) ou será descartada (``requeue=False``).
"""
self._final_action = Actions.REQUEUE if requeue else Actions.REJECT
def requeue(self):
self._final_action = Actions.REQUEUE_TAIL
def accept(self):
"""
Marca essa mensagem para ser confirmada (``ACK``) ao fim da execução do handler.
"""
self._final_action = Actions.ACK
def _process_action(self, action: Actions):
if action == Actions.REJECT:
self._amqp_message.reject(requeue=False)
elif action == Actions.REQUEUE:
self._amqp_message.reject(requeue=True)
elif action == Actions.REQUEUE_TAIL:
self._amqp_message.requeue()
elif action == Actions.ACK:
self._amqp_message.ack()
def process_success(self):
action = self._final_action or self._on_success_action
return self._process_action(action)
def process_exception(self):
action = self._final_action or self._on_exception_action
return self._process_action(action)

@ -0,0 +1,135 @@
import abc
from collections import UserDict
from typing import (
Any,
Callable,
Coroutine,
Dict,
Iterable,
List,
Optional,
Type,
Union,
)
from cached_property import cached_property
from pydantic import BaseModel, Extra, root_validator, validator
from amqpworker import conf
from amqpworker.connections import AMQPConnection, Connection
from amqpworker.options import Actions, DefaultValues, RouteTypes
RouteHandler = Callable[..., Coroutine]
class Model(BaseModel, abc.ABC):
"""
An abstract pydantic BaseModel that also behaves like a Mapping
"""
def __getitem__(self, item):
try:
return getattr(self, item)
except AttributeError as e:
raise KeyError from e
def __setitem__(self, key, value):
try:
return self.__setattr__(key, value)
except (AttributeError, ValueError) as e:
raise KeyError from e
def __eq__(self, other):
if isinstance(other, dict):
return self.dict() == other
return super(Model, self).__eq__(other)
def __len__(self):
return len(self.__fields__)
def keys(self):
return self.__fields__.keys()
def get(self, key, default=None):
try:
return self[key]
except KeyError:
return default
class _RouteOptions(Model):
pass
class Route(Model, abc.ABC):
"""
An abstract Model that acts like a route factory
"""
type: RouteTypes
handler: Any
routes: List[str]
connection: Optional[Connection]
options: _RouteOptions = _RouteOptions()
@staticmethod
def factory(data: Dict) -> "Route":
try:
type_ = data.pop("type")
except KeyError as e:
raise ValueError("Routes must have a type") from e
if type_ == RouteTypes.HTTP:
raise ValueError(f"'{type_}' is an invalid RouteType.")
if type_ == RouteTypes.AMQP_RABBITMQ:
return AMQPRoute(**data)
raise ValueError(f"'{type_}' is an invalid RouteType.")
class AMQPRouteOptions(_RouteOptions):
bulk_size: int = DefaultValues.BULK_SIZE
max_workers: int = DefaultValues.MAX_SUBMIT_WORKER_SIZE
bulk_flush_interval: int = DefaultValues.BULK_FLUSH_INTERVAL
on_success: Actions = DefaultValues.ON_SUCCESS
on_exception: Actions = DefaultValues.ON_EXCEPTION
connection_fail_callback: Optional[
Callable[[Exception, int], Coroutine]
] = None
connection: Optional[Union[AMQPConnection, str]]
class Config:
arbitrary_types_allowed = False
extra = Extra.forbid
class AMQPRoute(Route):
type: RouteTypes = RouteTypes.AMQP_RABBITMQ
vhost: str = conf.settings.AMQP_DEFAULT_VHOST
connection: Optional[AMQPConnection]
options: AMQPRouteOptions
class RoutesRegistry(UserDict):
def _get_routes_for_type(self, route_type: Type) -> Iterable:
return tuple((r for r in self.values() if isinstance(r, route_type)))
@cached_property
def amqp_routes(self) -> Iterable[AMQPRoute]:
return self._get_routes_for_type(AMQPRoute)
def __setitem__(self, key: RouteHandler, value: Union[Dict, Route]):
if not isinstance(value, Route):
route = Route.factory({"handler": key, **value})
else:
route = value
super(RoutesRegistry, self).__setitem__(key, route)
def add_route(self, route: Route) -> None:
self[route.handler] = route
def add_amqp_route(self, route: AMQPRoute) -> None:
self[route.handler] = route
def route_for(self, handler: RouteHandler) -> Route:
return self[handler]

@ -0,0 +1,162 @@
"""The MIT License (MIT)
Copyright (c) 2021 Yogaraj.S
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE."""
import threading
import traceback
from concurrent.futures import ThreadPoolExecutor
from typing import Optional, Callable
from delayedqueue import DelayedQueue
from loguru import logger
"""Wrapper for the task submitted to ScheduledThreadPoolExecutor class"""
import time
from typing import Callable
class ScheduledTask:
def __init__(self, runnable: Callable, initial_delay: int, period: int, *args, time_func=time.time, **kwargs):
super().__init__()
self.runnable = runnable
self.initial_delay = initial_delay
self.period = period
self.__time_func = time_func
self.args = args
self.kwargs = kwargs
self.__is_initial = True
self.task_time = int(self.__time_func() * 1000) + (initial_delay * 1000)
@property
def is_initial_run(self) -> bool:
return self.__is_initial
@property
def at_fixed_delay(self) -> bool:
return self.kwargs.get('is_fixed_delay', False)
@property
def at_fixed_rate(self) -> bool:
return self.kwargs.get('is_fixed_rate', False)
@property
def executor_ctx(self):
return self.kwargs['executor_ctx'] # pragma: no cover
@property
def exception_callback(self):
return self.kwargs.get('on_exception_callback')
@property
def time_func(self):
return self.__time_func
def __get_next_run(self) -> int:
if not (self.at_fixed_rate or self.at_fixed_delay):
raise TypeError("`get_next_run` invoked in a non-repeatable task")
return int(self.__time_func() * 1000) + self.period * 1000
def set_next_run(self, time_taken: float = 0) -> None:
self.__is_initial = False
self.task_time = self.__get_next_run() - time_taken
def __lt__(self, other) -> bool:
if not isinstance(other, ScheduledTask):
raise TypeError(f"{other} is not of type ScheduledTask")
return self.task_time < other.task_time
def __repr__(self) -> str:
return f"""(Task: {self.runnable.__name__}, Initial Delay: {self.initial_delay} second(s), Periodic: {self.period} second(s), Next run: {time.ctime(self.task_time / 1000)})"""
def run(self, *args, **kwargs):
st_time = time.time_ns()
try:
self.runnable(*self.args, **self.kwargs)
except Exception as e:
if self.exception_callback:
self.exception_callback(e, *self.args, **self.kwargs)
else:
traceback.print_exc()
finally:
end_time = time.time_ns()
time_taken = (end_time - st_time) / 1000000 # in milliseconds
if self.at_fixed_rate:
self.set_next_run(time_taken)
next_delay = (self.period * 1000 - time_taken) / 1000
if next_delay < 0 or self.task_time <= (self.__time_func() * 1000):
self.executor_ctx._put(self, 0)
else:
self.executor_ctx._put(self, next_delay)
elif self.at_fixed_delay:
self.set_next_run()
self.executor_ctx._put(self, self.period)
class ScheduledThreadPoolExecutor(ThreadPoolExecutor):
def __init__(self, max_workers=10, name=''):
super().__init__(max_workers=max_workers, thread_name_prefix=name)
self._max_workers = max_workers
self.queue = DelayedQueue()
self.shutdown = False
def schedule_at_fixed_rate(self, fn: Callable, initial_delay: int, period: int, *args, **kwargs) -> bool:
if self.shutdown:
raise RuntimeError(f"cannot schedule new task after shutdown!")
task = ScheduledTask(fn, initial_delay, period, *args, is_fixed_rate=True, executor_ctx=self, **kwargs)
return self._put(task, initial_delay)
def schedule_at_fixed_delay(self, fn: Callable, initial_delay: int, period: int, *args, **kwargs) -> bool:
if self.shutdown:
raise RuntimeError(f"cannot schedule new task after shutdown!")
task = ScheduledTask(fn, initial_delay, period, *args, is_fixed_delay=True, executor_ctx=self, **kwargs)
return self._put(task, initial_delay)
def schedule(self, fn, initial_delay, *args, **kwargs) -> bool:
task = ScheduledTask(fn, initial_delay, 0, *args, executor_ctx=self, **kwargs)
return self._put(task, initial_delay)
def _put(self, task: ScheduledTask, delay: int) -> bool:
# Don't use this explicitly. Use schedule/schedule_at_fixed_delay/schedule_at_fixed_rate. Additionally, to be
# called by ScheduledTask only!
if not isinstance(task, ScheduledTask):
raise TypeError(f"Task `{task!r}` must be of type ScheduledTask")
if delay < 0:
raise ValueError(f"Delay `{delay}` must be a non-negative number")
# logger.debug(f" enqueuing {task} with delay of {delay}")
return self.queue.put(task, delay)
def __run(self):
while not self.shutdown:
try:
task: ScheduledTask = self.queue.get()
super().submit(task.run, *task.args, **task.kwargs)
except Exception as e:
print(e)
def stop(self, app, wait_for_completion: Optional[bool] = False):
self.shutdown = True
super().shutdown(wait_for_completion)
def start(self, app):
t = threading.Thread(target=self.__run)
t.setDaemon(True)
t.start()

@ -0,0 +1,43 @@
import abc
import threading
from collections import UserList
class Freezable(metaclass=abc.ABCMeta):
def __init__(self):
self._frozen = False
@property
def frozen(self) -> bool:
return self._frozen
def freeze(self):
self._frozen = True
class Signal(UserList, threading.Event):
def __init__(self, owner: Freezable):
UserList.__init__(self)
threading.Event.__init__(self)
self._owner = owner
self.frozen = False
def __repr__(self):
return "<Signal owner={}, frozen={}, {!r}>".format(
self._owner, self.frozen, list(self)
)
def send(self, *args, **kwargs):
"""
Sends data to all registered receivers.
"""
if self.frozen:
raise RuntimeError("Cannot send on frozen signal.")
for receiver in self:
receiver(*args, **kwargs)
self.frozen = True
self._owner.freeze()
self.set()

@ -0,0 +1,12 @@
from typing import TYPE_CHECKING
if TYPE_CHECKING: # pragma: no cover
from amqpworker import App # noqa: F401
class SignalHandler:
def startup(self, app: "App"):
pass # pragma: no cover
def shutdown(self, app: "App"):
pass # pragma: no cover

@ -0,0 +1,47 @@
import logging
from asyncio import Task
from concurrent.futures import Future
from typing import TYPE_CHECKING, List
from loguru import logger
from amqpworker.connections import AMQPConnection
from amqpworker.consumer import Consumer
from amqpworker.options import RouteTypes
from amqpworker.signals.handlers.base import SignalHandler
if TYPE_CHECKING: # pragma: no cover
from amqpworker.app import App # noqa: F401
class RabbitMQ(SignalHandler):
def shutdown(self, app: "App"):
logger.debug('shutdown rabbit consumers')
if RouteTypes.AMQP_RABBITMQ in app:
for consumer in app[RouteTypes.AMQP_RABBITMQ]["consumers"]:
logger.debug(f'stop {consumer.host}')
consumer.stop()
logger.debug(f'stopped {consumer.host}')
def startup(self, app: "App") -> List[Future]:
tasks = []
app[RouteTypes.AMQP_RABBITMQ]["consumers"] = []
for route_info in app.routes_registry.amqp_routes:
conn: AMQPConnection = app.get_connection_for_route(route_info)
consumer = Consumer(
route_info=route_info,
host=conn.hostname,
port=conn.port,
username=conn.username,
password=conn.password,
prefetch_count=conn.prefetch,
)
app[RouteTypes.AMQP_RABBITMQ]["consumers"].append(consumer)
conn.register(consumer.queue)
task = app.loop.submit(consumer.start)
tasks.append(task)
return tasks

@ -0,0 +1,54 @@
from typing import Any, Dict, Optional, Tuple, Type
from amqpworker.typing import get_args, get_origin
class RegistryItem:
def __init__(
self, type: Type, value: Any, type_args: Optional[Tuple] = None
) -> None:
self.type = type
self.value = value
self.type_args = type_args
class TypesRegistry:
def __init__(self):
self._data: Dict[Tuple, RegistryItem] = {}
self._by_name: Dict[str, RegistryItem] = {}
def set(
self,
obj: Any,
type_definition: Optional[Type] = None,
param_name: Optional[str] = None,
) -> None:
has_type_args = get_args(type_definition)
origin = get_origin(obj) or obj.__class__
registry_item = RegistryItem(
type=origin, value=obj, type_args=has_type_args
)
self._data[(origin, has_type_args)] = registry_item
if param_name:
self._by_name[param_name] = registry_item
def get(
self, _type: Type, param_name: Optional[str] = None, type_args=None
) -> Optional[Any]:
origin = get_origin(_type) or _type
_type_args = type_args or get_args(_type)
if param_name:
try:
item = self._by_name[param_name]
if (item.type, item.type_args) == (origin, _type_args):
return item.value
except KeyError:
return None
try:
return self._data[(origin, get_args(_type))].value
except KeyError:
return None

@ -0,0 +1,66 @@
from typing import Optional, Tuple, Type, get_type_hints
def get_args(_type: Optional[Type]) -> Optional[Tuple]:
if _type and hasattr(_type, "__args__"):
return _type.__args__
return None
def get_origin(_type: Optional[Type]) -> Optional[Type]:
if _type and hasattr(_type, "__origin__"):
return _type.__origin__
return None
def get_handler_original_typehints(handler):
"""
Retorna a assinatura do handler amqpworker que está sendo decorado.
O retorno dessa chamada é equivalente a:
typing.get_type_hints(original_handler)
Onde `original_handler` é o handler amqpworker original.
Ideal para ser usado na pilha de decorators de um handler, ex:
.. code-block:: python
@deco1
@deco2
@deco3
async def handler(...):
pass
Nesse caso, se qualquer um dos 3 decorators precisar saber a assinatura
original, deve usar essa função passando a função recebida do decorator anterior.
"""
def _dummy():
pass
_dummy.__annotations__ = getattr(
handler, "amqpworker_original_annotations", handler.__annotations__
)
return get_type_hints(_dummy)
def is_base_type(_type, base_type):
"""
Retorna True para argumentos de um tipo base `base_type`.
Ex:
(a: MyGeneric[int]) -> True
(b: MyGeneric) -> True
"""
if get_origin(_type) is base_type:
return True
return issubclass(_type, base_type)
def get_handler_original_qualname(handler):
return getattr(
handler, "amqpworker_original_qualname", handler.__qualname__
)

@ -0,0 +1,13 @@
import functools
def call(fn, *args, **kwargs):
fn(*args, **kwargs)
def entrypoint(f):
@functools.wraps(f)
def _(*args, **kwargs):
return f(*args, **kwargs)
return _

@ -0,0 +1,19 @@
Copyright (c) 2017 B2W Digital
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

222
poetry.lock generated

@ -0,0 +1,222 @@
# This file is automatically @generated by Poetry 1.4.2 and should not be changed by hand.
[[package]]
name = "amqpstorm"
version = "2.10.6"
description = "Thread-safe Python RabbitMQ Client & Management library."
category = "main"
optional = false
python-versions = ">=2.7"
files = [
{file = "AMQPStorm-2.10.6.tar.gz", hash = "sha256:52685be58fee7783e0d2739bca4c1e8630fab22ccacb510fa84fa3cdd383e230"},
]
[package.dependencies]
pamqp = ">=2.0.0,<3.0"
[package.extras]
management = ["requests (>2)"]
pool = ["amqpstorm-pool"]
[package.source]
type = "legacy"
url = "https://mirror.baidu.com/pypi/simple"
reference = "douban"
[[package]]
name = "cached-property"
version = "1.5.2"
description = "A decorator for caching properties in classes."
category = "main"
optional = false
python-versions = "*"
files = [
{file = "cached-property-1.5.2.tar.gz", hash = "sha256:9fa5755838eecbb2d234c3aa390bd80fbd3ac6b6869109bfc1b499f7bd89a130"},
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]
[package.source]
type = "legacy"
url = "https://mirror.baidu.com/pypi/simple"
reference = "douban"
[[package]]
name = "colorama"
version = "0.4.6"
description = "Cross-platform colored terminal text."
category = "main"
optional = false
python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
files = [
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]
[package.source]
type = "legacy"
url = "https://mirror.baidu.com/pypi/simple"
reference = "douban"
[[package]]
name = "delayedqueue"
version = "1.0.0"
description = "Thread safe delay queue implementation"
category = "main"
optional = false
python-versions = "*"
files = [
{file = "delayedqueue-1.0.0-py3-none-any.whl", hash = "sha256:2617f1d14e8b7210d08540f0581a7548d7a2dcd6afc9578c635a6b5cce4d03f0"},
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]
[package.extras]
testing = ["pytest", "pytest-cov", "setuptools"]
[package.source]
type = "legacy"
url = "https://mirror.baidu.com/pypi/simple"
reference = "douban"
[[package]]
name = "loguru"
version = "0.7.0"
description = "Python logging made (stupidly) simple"
category = "main"
optional = false
python-versions = ">=3.5"
files = [
{file = "loguru-0.7.0-py3-none-any.whl", hash = "sha256:b93aa30099fa6860d4727f1b81f8718e965bb96253fa190fab2077aaad6d15d3"},
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[package.dependencies]
colorama = {version = ">=0.3.4", markers = "sys_platform == \"win32\""}
win32-setctime = {version = ">=1.0.0", markers = "sys_platform == \"win32\""}
[package.extras]
dev = ["Sphinx (==5.3.0)", "colorama (==0.4.5)", "colorama (==0.4.6)", "freezegun (==1.1.0)", "freezegun (==1.2.2)", "mypy (==v0.910)", "mypy (==v0.971)", "mypy (==v0.990)", "pre-commit (==3.2.1)", "pytest (==6.1.2)", "pytest (==7.2.1)", "pytest-cov (==2.12.1)", "pytest-cov (==4.0.0)", "pytest-mypy-plugins (==1.10.1)", "pytest-mypy-plugins (==1.9.3)", "sphinx-autobuild (==2021.3.14)", "sphinx-rtd-theme (==1.2.0)", "tox (==3.27.1)", "tox (==4.4.6)"]
[package.source]
type = "legacy"
url = "https://mirror.baidu.com/pypi/simple"
reference = "douban"
[[package]]
name = "pamqp"
version = "2.3.0"
description = "RabbitMQ Focused AMQP low-level library"
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[package.source]
type = "legacy"
url = "https://mirror.baidu.com/pypi/simple"
reference = "douban"
[[package]]
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]
[package.dependencies]
typing-extensions = ">=4.2.0"
[package.extras]
dotenv = ["python-dotenv (>=0.10.4)"]
email = ["email-validator (>=1.0.3)"]
[package.source]
type = "legacy"
url = "https://mirror.baidu.com/pypi/simple"
reference = "douban"
[[package]]
name = "typing-extensions"
version = "4.5.0"
description = "Backported and Experimental Type Hints for Python 3.7+"
category = "main"
optional = false
python-versions = ">=3.7"
files = [
{file = "typing_extensions-4.5.0-py3-none-any.whl", hash = "sha256:fb33085c39dd998ac16d1431ebc293a8b3eedd00fd4a32de0ff79002c19511b4"},
{file = "typing_extensions-4.5.0.tar.gz", hash = "sha256:5cb5f4a79139d699607b3ef622a1dedafa84e115ab0024e0d9c044a9479ca7cb"},
]
[package.source]
type = "legacy"
url = "https://mirror.baidu.com/pypi/simple"
reference = "douban"
[[package]]
name = "win32-setctime"
version = "1.1.0"
description = "A small Python utility to set file creation time on Windows"
category = "main"
optional = false
python-versions = ">=3.5"
files = [
{file = "win32_setctime-1.1.0-py3-none-any.whl", hash = "sha256:231db239e959c2fe7eb1d7dc129f11172354f98361c4fa2d6d2d7e278baa8aad"},
{file = "win32_setctime-1.1.0.tar.gz", hash = "sha256:15cf5750465118d6929ae4de4eb46e8edae9a5634350c01ba582df868e932cb2"},
]
[package.extras]
dev = ["black (>=19.3b0)", "pytest (>=4.6.2)"]
[package.source]
type = "legacy"
url = "https://mirror.baidu.com/pypi/simple"
reference = "douban"
[metadata]
lock-version = "2.0"
python-versions = "^3.9"
content-hash = "1ad42e5ed1903b95a7dcb25cd65c32d195b6937e5b31d95d4b2b19d2f0b4fc31"

@ -0,0 +1,26 @@
[tool.poetry]
name = "amqp-worker"
version = "0.1.0"
description = ""
authors = ["JimZhang <zzl22100048@gmail.com>"]
readme = "README.md"
packages = [{include = "amqp_worker"}]
[tool.poetry.dependencies]
python = "^3.9"
amqpstorm = {version = "^2.10.6", source = "douban"}
pydantic = {version = "1.10.7", source = "douban"}
loguru = {version = "^0.7.0", source = "douban"}
cached-property = {version = "^1.5.2", source = "douban"}
delayedqueue = {version = "^1.0.0", source = "douban"}
[build-system]
requires = ["poetry-core"]
build-backend = "poetry.core.masonry.api"
[[tool.poetry.source]]
name = "douban"
url = "https://mirror.baidu.com/pypi/simple"

@ -0,0 +1,6 @@
from loguru import logger
logger.error({'er':1,
'aa':None
})

@ -0,0 +1,29 @@
from datetime import datetime
from typing import List
from amqpworker.app import App
from amqpworker.connections import AMQPConnection
from amqpworker.rabbitmq import RabbitMQMessage
from amqpworker.routes import AMQPRouteOptions
amqp_conn = AMQPConnection(hostname='127.0.0.1', username='guest', password='guest', port=5672)
app = App(connections=[amqp_conn])
@app.amqp.consume(
['test'],
options=AMQPRouteOptions(bulk_size=1024 * 8, bulk_flush_interval=2)
)
def _handler(msgs: List[RabbitMQMessage]):
print(f"Recv {len(msgs)} {datetime.now().isoformat()}")
from loguru import logger
@app.run_every(1)
def produce(*args, **kwargs):
# logger.error("tick produce")
amqp_conn.put(data={'msg': 'ok'}, routing_key='test')
app.run()
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