master: remove simple parameter history

artiq/frontend/artiq_master.py

@@ -7,7 +7,7 @@ import os
 
 from artiq.protocols.pc_rpc import Server
 from artiq.protocols.sync_struct import Publisher
-from artiq.protocols.file_db import FlatFileDB, SimpleHistory
+from artiq.protocols.file_db import FlatFileDB
 from artiq.master.scheduler import Scheduler
 from artiq.master.results import RTResults, get_last_rid
 from artiq.master.repository import Repository
@@ -36,8 +36,6 @@ def main():
     init_logger(args)
     ddb = FlatFileDB("ddb.pyon")
     pdb = FlatFileDB("pdb.pyon")
-    simplephist = SimpleHistory(30)
-    pdb.hooks.append(simplephist)
     rtr = RTResults()
     repository = Repository()
 
@@ -74,7 +72,6 @@ def main():
         "schedule": scheduler.notifier,
         "devices": ddb.data,
         "parameters": pdb.data,
-        "parameters_simplehist": simplephist.history,
         "rt_results": rtr.groups,
         "explist": repository.explist
     })

artiq/protocols/file_db.py

@@ -36,19 +36,3 @@ class FlatFileDB:
         timestamp = time()
         for hook in self.hooks:
             hook.delete(timestamp, name)
-
-
-class SimpleHistory:
-    def __init__(self, depth):
-        self.depth = depth
-        self.history = Notifier([])
-
-    def set(self, timestamp, name, value):
-        if len(self.history.read) >= self.depth:
-            del self.history[0]
-        self.history.append((timestamp, name, value))
-
-    def delete(self, timestamp, name):
-        if len(self.history.read) >= self.depth:
-            del self.history[0]
-        self.history.append((timestamp, name))