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applets: Allow wildcard subscription to all datasets matching prefix via IPC
This allows ndscan v0.3+ to use the IPC interface for efficiency; previously, the non-upstreamed RID dataset namespace feature allowed the applets to somewhat efficient subscribe directly to the master process via the socket interface.
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@ -64,9 +64,10 @@ class AppletIPCClient(AsyncioChildComm):
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exc_info=True)
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self.close_cb()
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def subscribe(self, datasets, init_cb, mod_cb):
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def subscribe(self, datasets, init_cb, mod_cb, dataset_prefixes=[]):
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self.write_pyon({"action": "subscribe",
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"datasets": datasets})
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"datasets": datasets,
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"dataset_prefixes": dataset_prefixes})
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self.init_cb = init_cb
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self.mod_cb = mod_cb
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asyncio.ensure_future(self.listen())
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@ -113,6 +114,9 @@ class SimpleApplet:
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self.embed = os.getenv("ARTIQ_APPLET_EMBED")
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self.datasets = {getattr(self.args, arg.replace("-", "_"))
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for arg in self.dataset_args}
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# Optional prefixes (dataset sub-trees) to match subscriptions against;
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# currently only used by out-of-tree subclasses (ndscan).
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self.dataset_prefixes = []
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def qasync_init(self):
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app = QtWidgets.QApplication([])
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@ -162,6 +166,14 @@ class SimpleApplet:
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self.data = data
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return data
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def is_dataset_subscribed(self, key):
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if key in self.datasets:
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return True
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for prefix in self.dataset_prefixes:
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if key.startswith(prefix):
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return True
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return False
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def filter_mod(self, mod):
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if self.embed is not None:
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# the parent already filters for us
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@ -170,9 +182,9 @@ class SimpleApplet:
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if mod["action"] == "init":
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return True
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if mod["path"]:
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return mod["path"][0] in self.datasets
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return self.is_dataset_subscribed(mod["path"][0])
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elif mod["action"] in {"setitem", "delitem"}:
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return mod["key"] in self.datasets
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return self.is_dataset_subscribed(mod["key"])
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else:
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return False
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@ -25,6 +25,7 @@ class AppletIPCServer(AsyncioParentComm):
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AsyncioParentComm.__init__(self)
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self.datasets_sub = datasets_sub
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self.datasets = set()
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self.dataset_prefixes = []
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def write_pyon(self, obj):
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self.write(pyon.encode(obj).encode() + b"\n")
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@ -33,8 +34,16 @@ class AppletIPCServer(AsyncioParentComm):
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line = await self.readline()
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return pyon.decode(line.decode())
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def _is_dataset_subscribed(self, key):
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if key in self.datasets:
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return True
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for prefix in self.dataset_prefixes:
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if key.startswith(prefix):
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return True
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return False
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def _synthesize_init(self, data):
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struct = {k: v for k, v in data.items() if k in self.datasets}
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struct = {k: v for k, v in data.items() if self._is_dataset_subscribed(k)}
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return {"action": "init",
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"struct": struct}
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@ -43,10 +52,10 @@ class AppletIPCServer(AsyncioParentComm):
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mod = self._synthesize_init(mod["struct"])
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else:
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if mod["path"]:
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if mod["path"][0] not in self.datasets:
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if not self._is_dataset_subscribed(mod["path"][0]):
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return
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elif mod["action"] in {"setitem", "delitem"}:
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if mod["key"] not in self.datasets:
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if not self._is_dataset_subscribed(mod["key"]):
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return
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self.write_pyon({"action": "mod", "mod": mod})
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@ -64,6 +73,7 @@ class AppletIPCServer(AsyncioParentComm):
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fix_initial_size_cb()
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elif action == "subscribe":
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self.datasets = obj["datasets"]
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self.dataset_prefixes = obj["dataset_prefixes"]
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if self.datasets_sub.model is not None:
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mod = self._synthesize_init(
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self.datasets_sub.model.backing_store)
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