first version

README.md

@@ -1,2 +1,5 @@
 # ewents
 
+## Installation
+
+`pip install git+https://git.finnendahl.de/Yugon/ewents`

ewents/__init__.py

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+import asyncio
+import functools
+
+global_signals = {}
+
+
+async def emit(signal, payload=None):
+    for q in global_signals.get(signal, []):
+        if payload is not None:
+            await q.put({"payload": payload})
+        else:
+            await q.put({})
+
+
+async def shutdown():
+    for key in global_signals:
+        for q in global_signals[key]:
+            await q.put(None)
+
+
+def shutdown(loop=None):
+    if loop is None:
+        loop = asyncio.get_event_loop()
+    loop.run_until_complete(shutdown())
+
+
+async def consumer(queue, callback, signal):
+    while True:
+        item = await queue.get()
+        if item is None:
+            global_signals[signal].remove(queue)
+            break
+        if "payload" in item:
+            await callback(item["payload"])
+        else:
+            await callback()
+
+
+def listen_on(signal, fun=None, *, loop=None):
+    if loop is None:
+        loop = asyncio.get_event_loop()
+
+    def decorator(func, deco=True):
+        @functools.wraps(func)
+        def fun(*args, **kwargs):
+            return func(*args, **kwargs)
+
+        q = asyncio.Queue()
+        global_signals.setdefault(signal, []).append(q)
+        handle = loop.call_soon(
+            lambda: asyncio.ensure_future(consumer(q, func, signal))
+        )
+        if deco:
+            return fun
+        else:
+            return handle
+
+    if fun is not None:
+        return decorator(fun, False)
+    return decorator

examples/basic.py

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+import ewents
+import asyncio
+
+@ewents.listen_on("eventA")
+async def callbackA():
+    print("Listener A")
+    await ewents.emit("eventB")
+
+@ewents.listen_on("eventB")
+async def CallbackB1():
+    print("Listener B1")
+
+@ewents.listen_on("eventB")
+async def CallbackB2():
+    print("Listener B2")
+
+
+async def main():
+    while True:
+        await ewents.emit("eventA")
+        await asyncio.sleep(2)
+
+loop = asyncio.get_event_loop()
+loop.run_until_complete(main())
+loop.close()

setup.py

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+from setuptools import setup, find_packages
+import os
+from setuptools import setup
+
+# Utility function to read the README file.
+# Used for the long_description.  It's nice, because now 1) we have a top level
+# README file and 2) it's easier to type in the README file than to put a raw
+# string in below ...
+def read(fname):
+    return open(os.path.join(os.path.dirname(__file__), fname)).read()
+
+setup(
+    name="ewents",
+    version="0.1",
+    packages=find_packages(),
+    # scripts=['say_hello.py'],
+    # install_requires=['python_version>=3.5'],
+
+    # metadata to display on PyPI
+    author="Yugon",
+    author_email="ugogon@hotmail.de",
+    description="This is an async eventlistener library.",
+    keywords="async, ",
+    # url="http://example.com/HelloWorld/",   # project home page, if any
+    # project_urls={
+    #     "Bug Tracker": "https://bugs.example.com/HelloWorld/",
+    #     "Documentation": "https://docs.example.com/HelloWorld/",
+    #     "Source Code": "https://code.example.com/HelloWorld/",
+    # },
+    # classifiers=[
+    #     'License :: OSI Approved :: Python Software Foundation License'
+    # ],
+    python_requires=">=3.5",
+    long_description=read('README.md')
+)