Convert states from a number to a string

Remote clients are presented the data as-is rather than trying to coordinate
the meaning of abstract numbers.

confluent/consoleserver.py

@@ -7,6 +7,7 @@
 
 #we track nodes that are actively being logged, watched, or have attached
 #there should be no more than one handler per node
+import collections
 import confluent.exceptions as exc
 import confluent.interface.console as conapi
 import confluent.log as log
@@ -23,7 +24,7 @@ class _ConsoleHandler(object):
         self.rcpts = {}
         self.cfgmgr = configmanager
         self.node = node
-        self.connectstate = 0  # disconnected
+        self.connectstate = 'unconnected'
         self.logger = log.Logger(node, tenant=configmanager.tenant)
         self.buffer = bytearray()
         (text, termstate) = self.logger.read_recent_text(8192)
@@ -36,12 +37,12 @@ class _ConsoleHandler(object):
         if termstate & 2:
             self.shiftin = '0'
         self.users = {}
-        self.connectstate = 1  # connecting....
+        self.connectstate = 'connecting'
         eventlet.spawn(self._connect)
 
 
     def _connect(self):
-        self.connectstate = 1  # connecting....
+        self.connectstate = 'connecting'
         self._send_rcpts({'connectstate': self.connectstate})
         if self.reconnect:
             self.reconnect.cancel()
@@ -52,7 +53,7 @@ class _ConsoleHandler(object):
         try:
             self._console.connect(self.get_console_output)
         except exc.TargetEndpointUnreachable:
-            self.connectstate = 0
+            self.connectstate = 'unconnected'
             self._send_rcpts({'connectstate': self.connectstate})
             retrytime = 30 + (30 * random.random())
             print "Console was unreachable, waiting %d seconds..." % retrytime
@@ -61,11 +62,11 @@ class _ConsoleHandler(object):
         self._got_connected()
 
     def _got_connected(self):
-        self.connectstate = 2  # connected
+        self.connectstate = 'connected'
         self._send_rcpts({'connectstate': self.connectstate})
 
     def _got_disconnected(self):
-        self.connecstate = 0  # disconnected
+        self.connecstate = 'unconnected'
         eventlet.spawn(self._send_disconnect_events)
         self._send_rcpts({'connectstate': self.connectstate})
         self._connect()
@@ -79,14 +80,14 @@ class _ConsoleHandler(object):
         while hdl in self.rcpts:
             hdl = random.random()
         self.rcpts[hdl] = callback
-        if self.connectstate == 0:
+        if self.connectstate == 'unconnected':
             # if console is not connected, take time to try to assert
             # connectivity now.
             if self.reconnect:
                 # cancel an automated retry if one is pending
                 self.reconnect.cancel()
                 self.reconnect = None
-            self.connectstate = 1  # connecting....
+            self.connectstate = 'connecting'
             eventlet.spawn(self._connect)
         return hdl
 
@@ -237,7 +238,8 @@ class ConsoleSession(object):
         self.write = _handled_consoles[consk].write
         if datacallback is None:
             self.reaper = eventlet.spawn_after(15, self.destroy)
-            self.databuffer = _handled_consoles[consk].get_recent()
+            self.databuffer = collections.deque([])
+            self.databuffer.append(_handled_consoles[consk].get_recent())
             self.reghdl = _handled_consoles[consk].register_rcpt(self.got_data)
         else:
             self.reghdl = _handled_consoles[consk].register_rcpt(datacallback)
@@ -258,7 +260,7 @@ class ConsoleSession(object):
         If the caller does not provide a callback and instead will be polling
         for data, we must maintain data in a buffer until retrieved
         """
-        self.databuffer += data
+        self.databuffer.append(data)
         self._evt.set()
 
     def get_next_output(self, timeout=45):
@@ -268,12 +270,22 @@ class ConsoleSession(object):
         at least one case where we don't have that luxury
         """
         self.reaper.cancel()
-        if len(self.databuffer) == 0:
+        if not self.databuffer:
             self._evt.wait(timeout)
-        retval = self.databuffer
-        self.databuffer = ""
         if self._evt is not None:
             self._evt.clear()
+        if not self.databuffer:
+            self.reaper = eventlet.spawn_after(15, self.destroy)
+            return ""
+        currdata = self.databuffer.popleft()
+        if isinstance(currdata, dict):
+            self.reaper = eventlet.spawn_after(15, self.destroy)
+            return currdata
+        retval = currdata
+        while self.databuffer and not isinstance(self.databuffer[0], dict):
+            retval += self.databuffer.popleft()
+        # the client has 15 seconds to make a new request for data before
+        # they are given up on
         self.reaper = eventlet.spawn_after(15, self.destroy)
         return retval