example of multiple loops

docs/programming-guide.rst

@@ -36,6 +36,8 @@ If you're doing this inside a class, you could use ``self._txa`` or similar inst
 
    - when this is used, you set ``self._txa = txaio.with_config(loop=loop)``
 
+See the example in ``examples/multiloop.py``.
+
 
 Logging
 -------

examples/multiloop.py

@@ -0,0 +1,58 @@
+###############################################################################
+#
+# The MIT License (MIT)
+#
+# Copyright (c) Crossbar.io Technologies GmbH
+#
+# 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.
+#
+###############################################################################
+
+from __future__ import print_function
+
+# This example only works with asyncio
+
+import asyncio
+import pytest
+import txaio
+txaio.use_asyncio()
+
+
+class Thing(object):
+
+    def __init__(self, loop=None):
+        self._txa = txaio.with_config(loop=loop)
+
+    def do_thing(self):
+        f = self._txa.create_future()
+
+        def done():
+            self._txa.resolve(f, "done")
+        self._txa.call_later(1, done)
+        return f
+
+
+loop = asyncio.new_event_loop()
+thing0 = Thing()
+thing1 = Thing(loop=loop)
+
+asyncio.get_event_loop().run_until_complete(thing0.do_thing())
+# this will be error, mismatched loops:
+#asyncio.get_event_loop().run_until_complete(thing1.do_thing())
+loop.run_until_complete(thing1.do_thing())