Refactor Inventory

src/api.py

@@ -850,7 +850,6 @@ class MySimpleXMLRPCRequestHandler(SimpleXMLRPCRequestHandler):
         TTL = 2.5 * 24 * 60 * 60
         shared.inventory[inventoryHash] = (
             objectType, toStreamNumber, encryptedPayload, int(time.time()) + TTL,'')
-        shared.inventorySets[toStreamNumber].add(inventoryHash)
         with shared.printLock:
             print 'Broadcasting inv for msg(API disseminatePreEncryptedMsg command):', inventoryHash.encode('hex')
         shared.broadcastToSendDataQueues((
@@ -898,7 +897,6 @@ class MySimpleXMLRPCRequestHandler(SimpleXMLRPCRequestHandler):
         TTL = 28 * 24 * 60 * 60
         shared.inventory[inventoryHash] = (
             objectType, pubkeyStreamNumber, payload, int(time.time()) + TTL,'')
-        shared.inventorySets[pubkeyStreamNumber].add(inventoryHash)
         with shared.printLock:
             print 'broadcasting inv within API command disseminatePubkey with hash:', inventoryHash.encode('hex')
         shared.broadcastToSendDataQueues((

src/bitmessagemain.py

@@ -48,12 +48,7 @@ from helper_threading import *
 def connectToStream(streamNumber):
     shared.streamsInWhichIAmParticipating[streamNumber] = 'no data'
     selfInitiatedConnections[streamNumber] = {}
-    shared.inventorySets[streamNumber] = set()
-    queryData = sqlQuery('''SELECT hash FROM inventory WHERE streamnumber=?''', streamNumber)
-    for row in queryData:
-        shared.inventorySets[streamNumber].add(row[0])
 
-    
     if isOurOperatingSystemLimitedToHavingVeryFewHalfOpenConnections():
         # Some XP and Vista systems can only have 10 outgoing connections at a time.
         maximumNumberOfHalfOpenConnections = 9

src/bitmessageqt/__init__.py

@@ -2305,16 +2305,12 @@ class MyForm(settingsmixin.SMainWindow):
             # in the objectProcessorQueue to be processed
             if self.NewSubscriptionDialogInstance.ui.checkBoxDisplayMessagesAlreadyInInventory.isChecked():
                 status, addressVersion, streamNumber, ripe = decodeAddress(address)
-                shared.flushInventory()
+                shared.inventory.flush()
                 doubleHashOfAddressData = hashlib.sha512(hashlib.sha512(encodeVarint(
                     addressVersion) + encodeVarint(streamNumber) + ripe).digest()).digest()
                 tag = doubleHashOfAddressData[32:]
-                queryreturn = sqlQuery(
+                for value in shared.inventory.by_type_and_tag(3, tag):
-                    '''select payload from inventory where objecttype=3 and tag=?''', tag)
+                    shared.objectProcessorQueue.put((value.type, value.payload))
-                for row in queryreturn:
-                    payload, = row
-                    objectType = 3
-                    shared.objectProcessorQueue.put((objectType,payload))
 
     def click_pushButtonStatusIcon(self):
         logger.debug('click_pushButtonStatusIcon')
@@ -4196,23 +4192,22 @@ class NewSubscriptionDialog(QtGui.QDialog):
                 self.ui.checkBoxDisplayMessagesAlreadyInInventory.setText(
                     _translate("MainWindow", "Address is an old type. We cannot display its past broadcasts."))
             else:
-                shared.flushInventory()
+                shared.inventory.flush()
                 doubleHashOfAddressData = hashlib.sha512(hashlib.sha512(encodeVarint(
                     addressVersion) + encodeVarint(streamNumber) + ripe).digest()).digest()
                 tag = doubleHashOfAddressData[32:]
-                queryreturn = sqlQuery(
+                count = len(shared.inventory.by_type_and_tag(3, tag))
-                    '''select hash from inventory where objecttype=3 and tag=?''', tag)
+                if count == 0:
-                if len(queryreturn) == 0:
                     self.ui.checkBoxDisplayMessagesAlreadyInInventory.setText(
                         _translate("MainWindow", "There are no recent broadcasts from this address to display."))
-                elif len(queryreturn) == 1:
+                elif count == 1:
                     self.ui.checkBoxDisplayMessagesAlreadyInInventory.setEnabled(True)
                     self.ui.checkBoxDisplayMessagesAlreadyInInventory.setText(
-                        _translate("MainWindow", "Display the %1 recent broadcast from this address.").arg(str(len(queryreturn))))
+                        _translate("MainWindow", "Display the %1 recent broadcast from this address.").arg(count))
                 else:
                     self.ui.checkBoxDisplayMessagesAlreadyInInventory.setEnabled(True)
                     self.ui.checkBoxDisplayMessagesAlreadyInInventory.setText(
-                        _translate("MainWindow", "Display the %1 recent broadcasts from this address.").arg(str(len(queryreturn))))
+                        _translate("MainWindow", "Display the %1 recent broadcasts from this address.").arg(count))
 
 
 class NewAddressDialog(QtGui.QDialog):

src/class_receiveDataThread.py

@@ -216,14 +216,8 @@ class receiveDataThread(threading.Thread):
                 objectHash, = random.sample(
                     self.objectsThatWeHaveYetToGetFromThisPeer, 1)
                 if objectHash in shared.inventory:
-                    logger.debug('Inventory (in memory) already has object listed in inv message.')
+                    logger.debug('Inventory already has object listed in inv message.')
-                    del self.objectsThatWeHaveYetToGetFromThisPeer[
+                    del self.objectsThatWeHaveYetToGetFromThisPeer[objectHash]
-                        objectHash]
-                elif shared.isInSqlInventory(objectHash):
-                    if shared.verbose >= 3:
-                        logger.debug('Inventory (SQL on disk) already has object listed in inv message.')
-                    del self.objectsThatWeHaveYetToGetFromThisPeer[
-                        objectHash]
                 else:
                     # We don't have the object in our inventory. Let's request it.
                     self.sendgetdata(objectHash)
@@ -318,23 +312,10 @@ class receiveDataThread(threading.Thread):
 
     def sendBigInv(self):
         # Select all hashes for objects in this stream.
-        queryreturn = sqlQuery(
-            '''SELECT hash FROM inventory WHERE expirestime>? and streamnumber=?''',
-            int(time.time()),
-            self.streamNumber)
         bigInvList = {}
-        for row in queryreturn:
+        for hash in shared.inventory.unexpired_hashes_by_stream(self.streamNumber):
-            hash, = row
             if hash not in self.someObjectsOfWhichThisRemoteNodeIsAlreadyAware and not self.objectHashHolderInstance.hasHash(hash):
                 bigInvList[hash] = 0
-        # We also have messages in our inventory in memory (which is a python
-        # dictionary). Let's fetch those too.
-        with shared.inventoryLock:
-            for hash, storedValue in shared.inventory.items():
-                if hash not in self.someObjectsOfWhichThisRemoteNodeIsAlreadyAware:
-                    objectType, streamNumber, payload, expiresTime, tag = storedValue
-                    if streamNumber == self.streamNumber and expiresTime > int(time.time()):
-                        bigInvList[hash] = 0
         numberOfObjectsInInvMessage = 0
         payload = ''
         # Now let us start appending all of these hashes together. They will be
@@ -440,9 +421,7 @@ class receiveDataThread(threading.Thread):
                 data[lengthOfVarint:32 + lengthOfVarint]] = 0
             shared.numberOfInventoryLookupsPerformed += 1
             if data[lengthOfVarint:32 + lengthOfVarint] in shared.inventory:
-                logger.debug('Inventory (in memory) has inventory item already.')
+                logger.debug('Inventory has inventory item already.')
-            elif shared.isInSqlInventory(data[lengthOfVarint:32 + lengthOfVarint]):
-                logger.debug('Inventory (SQL on disk) has inventory item already.')
             else:
                 self.sendgetdata(data[lengthOfVarint:32 + lengthOfVarint])
         else:
@@ -453,7 +432,7 @@ class receiveDataThread(threading.Thread):
             advertisedSet = set()
             for i in range(numberOfItemsInInv):
                 advertisedSet.add(data[lengthOfVarint + (32 * i):32 + lengthOfVarint + (32 * i)])
-            objectsNewToMe = advertisedSet - shared.inventorySets[self.streamNumber]
+            objectsNewToMe = advertisedSet - shared.inventory.hashes_by_stream(self.streamNumber)
             logger.info('inv message lists %s objects. Of those %s are new to me. It took %s seconds to figure that out.', numberOfItemsInInv, len(objectsNewToMe), time.time()-startTime)
             for item in objectsNewToMe:  
                 if totalNumberOfobjectsThatWeHaveYetToGetFromAllPeers > 200000 and len(self.objectsThatWeHaveYetToGetFromThisPeer) > 1000 and shared.trustedPeer == None:  # inv flooding attack mitigation
@@ -491,20 +470,10 @@ class receiveDataThread(threading.Thread):
             if self.objectHashHolderInstance.hasHash(hash):
                 shared.inventoryLock.release()
                 self.antiIntersectionDelay()
-            elif hash in shared.inventory:
-                objectType, streamNumber, payload, expiresTime, tag = shared.inventory[hash]
-                shared.inventoryLock.release()
-                self.sendObject(payload)
             else:
                 shared.inventoryLock.release()
-                queryreturn = sqlQuery(
+                if hash in shared.inventory:
-                    '''select payload from inventory where hash=? and expirestime>=?''',
+                    self.sendObject(shared.inventory[hash].payload)
-                    hash,
-                    int(time.time()))
-                if queryreturn != []:
-                    for row in queryreturn:
-                        payload, = row
-                    self.sendObject(payload)
                 else:
                     self.antiIntersectionDelay()
                     logger.warning('%s asked for an object with a getdata which is not in either our memory inventory or our SQL inventory. We probably cleaned it out after advertising it but before they got around to asking for it.' % (self.peer,))

src/class_singleCleaner.py

@@ -46,19 +46,7 @@ class singleCleaner(threading.Thread, StoppableThread):
         while shared.shutdown == 0:
             shared.UISignalQueue.put((
                 'updateStatusBar', 'Doing housekeeping (Flushing inventory in memory to disk...)'))
-            with shared.inventoryLock: # If you use both the inventoryLock and the sqlLock, always use the inventoryLock OUTSIDE of the sqlLock.
+            shared.inventory.flush()
-                with SqlBulkExecute() as sql:
-                    for hash, storedValue in shared.inventory.items():
-                        objectType, streamNumber, payload, expiresTime, tag = storedValue
-                        sql.execute(
-                            '''INSERT INTO inventory VALUES (?,?,?,?,?,?)''',
-                            hash,
-                            objectType,
-                            streamNumber,
-                            payload,
-                            expiresTime,
-                            tag)
-                        del shared.inventory[hash]
             shared.UISignalQueue.put(('updateStatusBar', ''))
             
             shared.broadcastToSendDataQueues((
@@ -70,9 +58,7 @@ class singleCleaner(threading.Thread, StoppableThread):
                 shared.UISignalQueue.queue.clear()
             if timeWeLastClearedInventoryAndPubkeysTables < int(time.time()) - 7380:
                 timeWeLastClearedInventoryAndPubkeysTables = int(time.time())
-                sqlExecute(
+                shared.inventory.clean()
-                    '''DELETE FROM inventory WHERE expirestime<? ''',
-                    int(time.time()) - (60 * 60 * 3))
                 # pubkeys
                 sqlExecute(
                     '''DELETE FROM pubkeys WHERE time<? AND usedpersonally='no' ''',
@@ -94,20 +80,6 @@ class singleCleaner(threading.Thread, StoppableThread):
                     elif status == 'msgsent':
                         resendMsg(ackData)
 
-                # Let's also clear and reload shared.inventorySets to keep it from
-                # taking up an unnecessary amount of memory.
-                for streamNumber in shared.inventorySets:
-                    shared.inventorySets[streamNumber] = set()
-                    queryData = sqlQuery('''SELECT hash FROM inventory WHERE streamnumber=?''', streamNumber)
-                    for row in queryData:
-                        shared.inventorySets[streamNumber].add(row[0])
-                with shared.inventoryLock:
-                    for hash, storedValue in shared.inventory.items():
-                        objectType, streamNumber, payload, expiresTime, tag = storedValue
-                        if not streamNumber in shared.inventorySets:
-                            shared.inventorySets[streamNumber] = set()
-                        shared.inventorySets[streamNumber].add(hash)
-
             # Let us write out the knowNodes to disk if there is anything new to write out.
             if shared.needToWriteKnownNodesToDisk:
                 shared.knownNodesLock.acquire()

src/class_singleWorker.py

@@ -158,7 +158,6 @@ class singleWorker(threading.Thread, StoppableThread):
         objectType = 1
         shared.inventory[inventoryHash] = (
             objectType, streamNumber, payload, embeddedTime,'')
-        shared.inventorySets[streamNumber].add(inventoryHash)
 
         logger.info('broadcasting inv with hash: ' + inventoryHash.encode('hex'))
 
@@ -249,7 +248,6 @@ class singleWorker(threading.Thread, StoppableThread):
         objectType = 1
         shared.inventory[inventoryHash] = (
             objectType, streamNumber, payload, embeddedTime,'')
-        shared.inventorySets[streamNumber].add(inventoryHash)
 
         logger.info('broadcasting inv with hash: ' + inventoryHash.encode('hex'))
 
@@ -340,7 +338,6 @@ class singleWorker(threading.Thread, StoppableThread):
         objectType = 1
         shared.inventory[inventoryHash] = (
             objectType, streamNumber, payload, embeddedTime, doubleHashOfAddressData[32:])
-        shared.inventorySets[streamNumber].add(inventoryHash)
 
         logger.info('broadcasting inv with hash: ' + inventoryHash.encode('hex'))
 
@@ -463,7 +460,6 @@ class singleWorker(threading.Thread, StoppableThread):
             objectType = 3
             shared.inventory[inventoryHash] = (
                 objectType, streamNumber, payload, embeddedTime, tag)
-            shared.inventorySets[streamNumber].add(inventoryHash)
             logger.info('sending inv (within sendBroadcast function) for object: ' + inventoryHash.encode('hex'))
             shared.broadcastToSendDataQueues((
                 streamNumber, 'advertiseobject', inventoryHash))
@@ -558,37 +554,20 @@ class singleWorker(threading.Thread, StoppableThread):
                             privEncryptionKey = doubleHashOfToAddressData[:32] # The first half of the sha512 hash.
                             tag = doubleHashOfToAddressData[32:] # The second half of the sha512 hash.
                             shared.neededPubkeys[tag] = (toaddress, highlevelcrypto.makeCryptor(privEncryptionKey.encode('hex')))
-                            
-                            queryreturn = sqlQuery(
-                                '''SELECT payload FROM inventory WHERE objecttype=1 and tag=? ''', toTag)
-                            if queryreturn != []: # if there are any pubkeys in our inventory with the correct tag..
-                                for row in queryreturn:
-                                    payload, = row
-                                    if shared.decryptAndCheckPubkeyPayload(payload, toaddress) == 'successful':
-                                        needToRequestPubkey = False
-                                        sqlExecute(
-                                            '''UPDATE sent SET status='doingmsgpow', retrynumber=0 WHERE toaddress=? AND (status='msgqueued' or status='awaitingpubkey' or status='doingpubkeypow')''',
-                                            toaddress)
-                                        del shared.neededPubkeys[tag]
-                                        break
-                                    #else:  # There was something wrong with this pubkey object even
-                                            # though it had the correct tag- almost certainly because
-                                            # of malicious behavior or a badly programmed client. If
-                                            # there are any other pubkeys in our inventory with the correct
-                                            # tag then we'll try to decrypt those.
 
-                            if needToRequestPubkey: # Obviously we had no success looking in the sql inventory. Let's look through the memory inventory.
+                            for value in shared.inventory.by_type_and_tag(1, toTag):
-                                with shared.inventoryLock:
+                                if shared.decryptAndCheckPubkeyPayload(value.payload, toaddress) == 'successful': #if valid, this function also puts it in the pubkeys table.
-                                    for hash, storedValue in shared.inventory.items():
+                                    needToRequestPubkey = False
-                                        objectType, streamNumber, payload, expiresTime, tag = storedValue
+                                    sqlExecute(
-                                        if objectType == 1 and tag == toTag:
+                                        '''UPDATE sent SET status='doingmsgpow', retrynumber=0 WHERE toaddress=? AND (status='msgqueued' or status='awaitingpubkey' or status='doingpubkeypow')''',
-                                            if shared.decryptAndCheckPubkeyPayload(payload, toaddress) == 'successful': #if valid, this function also puts it in the pubkeys table.
+                                        toaddress)
-                                                needToRequestPubkey = False
+                                    del shared.neededPubkeys[tag]
-                                                sqlExecute(
+                                    break
-                                                    '''UPDATE sent SET status='doingmsgpow', retrynumber=0 WHERE toaddress=? AND (status='msgqueued' or status='awaitingpubkey' or status='doingpubkeypow')''',
+                                #else:  # There was something wrong with this pubkey object even
-                                                    toaddress)
+                                        # though it had the correct tag- almost certainly because
-                                                del shared.neededPubkeys[tag]
+                                        # of malicious behavior or a badly programmed client. If
-                                                break
+                                        # there are any other pubkeys in our inventory with the correct
+                                        # tag then we'll try to decrypt those.
                         if needToRequestPubkey:
                             sqlExecute(
                                 '''UPDATE sent SET status='doingpubkeypow' WHERE toaddress=? AND status='msgqueued' ''',
@@ -811,7 +790,6 @@ class singleWorker(threading.Thread, StoppableThread):
             objectType = 2
             shared.inventory[inventoryHash] = (
                 objectType, toStreamNumber, encryptedPayload, embeddedTime, '')
-            shared.inventorySets[toStreamNumber].add(inventoryHash)
             if shared.config.has_section(toaddress) or not checkBitfield(behaviorBitfield, shared.BITFIELD_DOESACK):
                 shared.UISignalQueue.put(('updateSentItemStatusByAckdata', (ackdata, tr.translateText("MainWindow", "Message sent. Sent at %1").arg(l10n.formatTimestamp()))))
             else:
@@ -921,7 +899,6 @@ class singleWorker(threading.Thread, StoppableThread):
         objectType = 1
         shared.inventory[inventoryHash] = (
             objectType, streamNumber, payload, embeddedTime, '')
-        shared.inventorySets[streamNumber].add(inventoryHash)
         logger.info('sending inv (for the getpubkey message)')
         shared.broadcastToSendDataQueues((
             streamNumber, 'advertiseobject', inventoryHash))

src/shared.py

@@ -49,8 +49,7 @@ addressGeneratorQueue = Queue.Queue()
 knownNodesLock = threading.Lock()
 knownNodes = {}
 sendDataQueues = [] #each sendData thread puts its queue in this list.
-inventory = {} #of objects (like msg payloads and pubkey payloads) Does not include protocol headers (the first 24 bytes of each packet).
+inventoryLock = threading.RLock() #Guarantees that two receiveDataThreads don't receive and process the same message concurrently (probably sent by a malicious individual)
-inventoryLock = threading.Lock() #Guarantees that two receiveDataThreads don't receive and process the same message concurrently (probably sent by a malicious individual)
 printLock = threading.Lock()
 appdata = '' #holds the location of the application data storage directory
 statusIconColor = 'red'
@@ -85,7 +84,6 @@ lastTimeWeResetBytesSent = 0 # used for the bandwidth rate limit
 sendDataLock = threading.Lock() # used for the bandwidth rate limit
 receiveDataLock = threading.Lock() # used for the bandwidth rate limit
 daemon = False
-inventorySets = {1: set()} # key = streamNumer, value = a set which holds the inventory object hashes that we are aware of. This is used whenever we receive an inv message from a peer to check to see what items are new to us. We don't delete things out of it; instead, the singleCleaner thread clears and refills it every couple hours.
 needToWriteKnownNodesToDisk = False # If True, the singleCleaner will write it to disk eventually.
 maximumLengthOfTimeToBotherResendingMessages = 0
 objectProcessorQueue = ObjectProcessorQueue()  # receiveDataThreads dump objects they hear on the network into this queue to be processed.
@@ -135,6 +133,88 @@ NODE_SSL = 2
 #Bitfield flags
 BITFIELD_DOESACK = 1
 
+import collections
+
+InventoryItem = collections.namedtuple('InventoryItem', 'type stream payload expires tag')
+
+
+class Inventory(collections.MutableMapping):
+    def __init__(self):
+        super(Inventory, self).__init__()
+        self._inventory = {} #of objects (like msg payloads and pubkey payloads) Does not include protocol headers (the first 24 bytes of each packet).
+        self._streams = collections.defaultdict(set) # key = streamNumer, value = a set which holds the inventory object hashes that we are aware of. This is used whenever we receive an inv message from a peer to check to see what items are new to us. We don't delete things out of it; instead, the singleCleaner thread clears and refills it every couple hours.
+
+    def __contains__(self, hash):
+        global numberOfInventoryLookupsPerformed
+        with inventoryLock:
+            numberOfInventoryLookupsPerformed += 1
+            if hash in self._inventory:
+                return True
+            return bool(sqlQuery('SELECT 1 FROM inventory WHERE hash=?', hash))
+
+    def __getitem__(self, hash):
+        with inventoryLock:
+            if hash in self._inventory:
+                return self._inventory[hash]
+            rows = sqlQuery('SELECT objecttype, streamnumber, payload, expirestime, tag FROM inventory WHERE hash=?', hash)
+            if not rows:
+                raise KeyError(hash)
+            return InventoryItem(*rows[0])
+
+    def __setitem__(self, hash, value):
+        with inventoryLock:
+            value = InventoryItem(*value)
+            self._inventory[hash] = value
+            self._streams[value.stream].add(hash)
+
+    def __delitem__(self, hash):
+        raise NotImplementedError
+
+    def __iter__(self):
+        with inventoryLock:
+            hashes = self._inventory.keys()[:]
+            hashes += (hash for hash, in sqlQuery('SELECT hash FROM inventory'))
+            return hashes.__iter__()
+
+    def __len__(self):
+        with inventoryLock:
+            return len(self._inventory) + sqlQuery('SELECT count(*) FROM inventory')[0][0]
+
+    def by_type_and_tag(self, type, tag):
+        with inventoryLock:
+            values = [value for value in self._inventory.values() if value.type == type and value.tag == tag]
+            values += (InventoryItem(*value) for value in sqlQuery('SELECT objecttype, streamnumber, payload, expirestime, tag FROM inventory WHERE objecttype=? AND tag=?', type, tag))
+            return values
+
+    def hashes_by_stream(self, stream):
+        with inventoryLock:
+            return self._streams[stream]
+
+    def unexpired_hashes_by_stream(self, stream):
+        with inventoryLock:
+            t = int(time.time())
+            hashes = [hash for hash, value in self._inventory.items() if value.stream == stream and value.expires > t]
+            hashes += (payload for payload, in sqlQuery('SELECT hash FROM inventory WHERE streamnumber=? AND expirestime>?', stream, t))
+            return hashes
+
+    def flush(self):
+        with inventoryLock: # If you use both the inventoryLock and the sqlLock, always use the inventoryLock OUTSIDE of the sqlLock.
+            with SqlBulkExecute() as sql:
+                for hash, value in self._inventory.items():
+                    sql.execute('INSERT INTO inventory VALUES (?, ?, ?, ?, ?, ?)', hash, *value)
+                self._inventory.clear()
+
+    def clean(self):
+        with inventoryLock:
+            sqlExecute('DELETE FROM inventory WHERE expirestime<?',int(time.time()) - (60 * 60 * 3))
+            self._streams.clear()
+            for hash, value in self.items():
+                self._streams[value.stream].add(hash)
+
+
+inventory = Inventory()
+
+
 #Create a packet
 def CreatePacket(command, payload=''):
     payload_length = len(payload)
@@ -145,9 +225,6 @@ def CreatePacket(command, payload=''):
     b[Header.size:] = payload
     return bytes(b)
 
-def isInSqlInventory(hash):
-    queryreturn = sqlQuery('''select hash from inventory where hash=?''', hash)
-    return queryreturn != []
 
 def encodeHost(host):
     if host.find('.onion') > -1:
@@ -417,8 +494,8 @@ def doCleanShutdown():
     UISignalQueue.put((
         'updateStatusBar',
         'Flushing inventory in memory out to disk. This should normally only take a second...'))
-    flushInventory()
+    inventory.flush()
-    
+
     # Verify that the objectProcessor has finished exiting. It should have incremented the 
     # shutdown variable from 1 to 2. This must finish before we command the sqlThread to exit.
     while shutdown == 1:
@@ -452,15 +529,6 @@ def broadcastToSendDataQueues(data):
     # logger.debug('running broadcastToSendDataQueues')
     for q in sendDataQueues:
         q.put(data)
-        
-def flushInventory():
-    #Note that the singleCleanerThread clears out the inventory dictionary from time to time, although it only clears things that have been in the dictionary for a long time. This clears the inventory dictionary Now.
-    with SqlBulkExecute() as sql:
-        for hash, storedValue in inventory.items():
-            objectType, streamNumber, payload, expiresTime, tag = storedValue
-            sql.execute('''INSERT INTO inventory VALUES (?,?,?,?,?,?)''',
-                       hash,objectType,streamNumber,payload,expiresTime,tag)
-            del inventory[hash]
 
 def fixPotentiallyInvalidUTF8Data(text):
     try:
@@ -703,14 +771,9 @@ def _checkAndShareUndefinedObjectWithPeers(data):
         logger.debug('We have already received this undefined object. Ignoring.')
         inventoryLock.release()
         return
-    elif isInSqlInventory(inventoryHash):
-        logger.debug('We have already received this undefined object (it is stored on disk in the SQL inventory). Ignoring it.')
-        inventoryLock.release()
-        return
     objectType, = unpack('>I', data[16:20])
     inventory[inventoryHash] = (
         objectType, streamNumber, data, embeddedTime,'')
-    inventorySets[streamNumber].add(inventoryHash)
     inventoryLock.release()
     logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))
     broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))
@@ -735,15 +798,10 @@ def _checkAndShareMsgWithPeers(data):
         logger.debug('We have already received this msg message. Ignoring.')
         inventoryLock.release()
         return
-    elif isInSqlInventory(inventoryHash):
-        logger.debug('We have already received this msg message (it is stored on disk in the SQL inventory). Ignoring it.')
-        inventoryLock.release()
-        return
     # This msg message is valid. Let's let our peers know about it.
     objectType = 2
     inventory[inventoryHash] = (
         objectType, streamNumber, data, embeddedTime,'')
-    inventorySets[streamNumber].add(inventoryHash)
     inventoryLock.release()
     logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))
     broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))
@@ -776,15 +834,10 @@ def _checkAndShareGetpubkeyWithPeers(data):
         logger.debug('We have already received this getpubkey request. Ignoring it.')
         inventoryLock.release()
         return
-    elif isInSqlInventory(inventoryHash):
-        logger.debug('We have already received this getpubkey request (it is stored on disk in the SQL inventory). Ignoring it.')
-        inventoryLock.release()
-        return
 
     objectType = 0
     inventory[inventoryHash] = (
         objectType, streamNumber, data, embeddedTime,'')
-    inventorySets[streamNumber].add(inventoryHash)
     inventoryLock.release()
     # This getpubkey request is valid. Forward to peers.
     logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))
@@ -820,14 +873,9 @@ def _checkAndSharePubkeyWithPeers(data):
         logger.debug('We have already received this pubkey. Ignoring it.')
         inventoryLock.release()
         return
-    elif isInSqlInventory(inventoryHash):
-        logger.debug('We have already received this pubkey (it is stored on disk in the SQL inventory). Ignoring it.')
-        inventoryLock.release()
-        return
     objectType = 1
     inventory[inventoryHash] = (
         objectType, streamNumber, data, embeddedTime, tag)
-    inventorySets[streamNumber].add(inventoryHash)
     inventoryLock.release()
     # This object is valid. Forward it to peers.
     logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))
@@ -864,15 +912,10 @@ def _checkAndShareBroadcastWithPeers(data):
         logger.debug('We have already received this broadcast object. Ignoring.')
         inventoryLock.release()
         return
-    elif isInSqlInventory(inventoryHash):
-        logger.debug('We have already received this broadcast object (it is stored on disk in the SQL inventory). Ignoring it.')
-        inventoryLock.release()
-        return
     # It is valid. Let's let our peers know about it.
     objectType = 3
     inventory[inventoryHash] = (
         objectType, streamNumber, data, embeddedTime, tag)
-    inventorySets[streamNumber].add(inventoryHash)
     inventoryLock.release()
     # This object is valid. Forward it to peers.
     logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))