datastore

1 files changed, 89 insertions, 0 deletions

diff --git a/datastore/store/controller.py b/datastore/store/controller.py
new file mode 100644
index 0000000..0814488
--- /dev/null
+++ b/datastore/store/controller.py
@@ -0,0 +1,89 @@
+import traceback
+
+class SubscriptionManager:
+    def __init__(self):
+        self.s = {}
+
+    def subscribe(self,name,replyTo):
+        if not self.s.has_key(name):
+            self.s[name] = []
+        assert self.s.has_key(name)
+
+        if replyTo not in self.s[name]:
+            self.s[name].append(replyTo)
+
+    def unsubscribe(self,name,replyTo):
+        assert self.s.has_key(name)
+        assert replyTo in self.s[name]
+        self.s[name].remove(replyTo)
+
+    def notify(self, name, timestamp, data, controller):
+        if not self.s.has_key(name):
+            return
+        for replyTo in self.s[name]:
+            controller.client.send(replyTo,
+                                   "{0}={1}".format(name,dat),
+                                   extra_headers={'timestamp':timestamp})
+
+class StoreController:
+    def __init__(self, client, channels, processors):
+        self.client = client
+        self.channels = channels
+        self.processors = processors
+        self.subscriptions = SubscriptionManager()
+
+    def put(self, name, timestamp, data):
+        assert self.channels.has_key(name)
+
+        self.channels[name].add(timestamp, data, self)
+        self.subscriptions.notify(name, timestamp, data, self)
+        if self.processors.has_key(name):
+            for processor in self.processors[name]:
+                processor.process(name, timestamp, data, self)
+
+    def get(self, name, query):
+        assert self.channels.has_key(name)
+        return self.channels[name].get(query)
+
+    def subscribe(self,name, replyTo):
+        assert self.channels.has_key(frame.name)
+        self.subscriptions.subscribe(name, replyTo)
+
+    def unsubscribe(self,name,replyTo):
+        assert self.channels.has_key(frame.name)
+        self.subscriptions.unsubscribe(name,replyTo)
+
+class MQStoreController(StoreController):
+    def cb_put(self, frame):
+        try:
+            assert len(frame.timestamp) > 0
+            values = map(lambda kv: kv.split("="), frame.body.split("\n"))
+            for (name,data) in values:
+                assert self.channels.has_key(name)
+                print name,"=",data
+
+            for (name,data) in values:
+                self.put(name, frame.timestamp, data)
+        except Exception,e: traceback.print_exc()
+
+
+    def cb_get(self, frame):
+        try:
+            assert len(frame.headers['reply-to']) > 0
+            r = self.get(frame.name, frame.body)
+            print "send",frame.name,r
+            self.client.send(frame.headers['reply-to'],
+                             body=r)
+        except Exception,e: traceback.print_exc()
+
+
+    def cb_subscribe(self, frame):
+        try:
+            assert len(frame.headers['reply-to']) > 0
+            assert frame.action in ["subscribe","unsubscribe"]
+        
+            if frame.action == "subscribe":
+                self.subscribe(frame.name, frame.headers['reply-to'])
+            elif frame.action == "unsubscribe":
+                self.unsubscribe(frame.name, frame.headers['reply-to'])
+        except Exception,e: traceback.print_exc()