src/api.py

@@ -94,7 +94,6 @@ from defaults import (
 from helper_sql import (
     SqlBulkExecute, sqlExecute, sqlQuery, sqlStoredProcedure, sql_ready)
 from highlevelcrypto import calculateInventoryHash
-from inventory import Inventory
 
 try:
     from network import BMConnectionPool
@@ -1340,7 +1339,7 @@ class BMRPCDispatcher(object):
             encryptedPayload = pack('>Q', nonce) + encryptedPayload
 
         inventoryHash = calculateInventoryHash(encryptedPayload)
-        Inventory()[inventoryHash] = (
+        state.Inventory[inventoryHash] = (
             objectType, toStreamNumber, encryptedPayload,
             expiresTime, b''
         )
@@ -1396,7 +1395,7 @@ class BMRPCDispatcher(object):
         inventoryHash = calculateInventoryHash(payload)
         objectType = 1  # .. todo::: support v4 pubkeys
         TTL = 28 * 24 * 60 * 60
-        Inventory()[inventoryHash] = (
+        state.Inventory[inventoryHash] = (
             objectType, pubkeyStreamNumber, payload, int(time.time()) + TTL, ''
         )
         logger.info(

src/bitmessagecurses/__init__.py

@@ -30,7 +30,6 @@ import state
 from addresses import addBMIfNotPresent, decodeAddress
 from bmconfigparser import config
 from helper_sql import sqlExecute, sqlQuery
-from inventory import Inventory
 
 # pylint: disable=global-statement
 
@@ -145,8 +144,8 @@ def scrollbox(d, text, height=None, width=None):
 def resetlookups():
     """Reset the Inventory Lookups"""
     global inventorydata
-    inventorydata = Inventory().numberOfInventoryLookupsPerformed
+    inventorydata = state.Inventory.numberOfInventoryLookupsPerformed
-    Inventory().numberOfInventoryLookupsPerformed = 0
+    state.Inventory.numberOfInventoryLookupsPerformed = 0
     Timer(1, resetlookups, ()).start()
 
 

src/bitmessagemain.py

@@ -176,8 +176,7 @@ class Main(object):
         # The closeEvent should command this thread to exit gracefully.
         sqlLookup.daemon = False
         sqlLookup.start()
-
+        state.Inventory = Inventory()  # init
-        Inventory()  # init
 
         if state.enableObjProc:  # Not needed if objproc is disabled
             # Start the address generation thread

src/bitmessageqt/address_dialogs.py

@@ -9,10 +9,10 @@ from PyQt4 import QtCore, QtGui
 
 import queues
 import widgets
+import state
 from account import AccountMixin, GatewayAccount, MailchuckAccount, accountClass
 from addresses import addBMIfNotPresent, decodeAddress, encodeVarint
 from bmconfigparser import config as global_config
-from inventory import Inventory
 from tr import _translate
 
 
@@ -190,13 +190,13 @@ class NewSubscriptionDialog(AddressDataDialog):
                 " broadcasts."
             ))
         else:
-            Inventory().flush()
+            state.Inventory.flush()
             doubleHashOfAddressData = hashlib.sha512(hashlib.sha512(
                 encodeVarint(addressVersion)
                 + encodeVarint(streamNumber) + ripe
             ).digest()).digest()
             tag = doubleHashOfAddressData[32:]
-            self.recent = Inventory().by_type_and_tag(3, tag)
+            self.recent = state.Inventory.by_type_and_tag(3, tag)
             count = len(self.recent)
             if count == 0:
                 self.checkBoxDisplayMessagesAlreadyInInventory.setText(

src/bitmessageqt/networkstatus.py

@@ -10,7 +10,6 @@ import l10n
 import network.stats
 import state
 import widgets
-from inventory import Inventory
 from network import BMConnectionPool, knownnodes
 from retranslateui import RetranslateMixin
 from tr import _translate
@@ -50,7 +49,7 @@ class NetworkStatus(QtGui.QWidget, RetranslateMixin):
 
     def startUpdate(self):
         """Start a timer to update counters every 2 seconds"""
-        Inventory().numberOfInventoryLookupsPerformed = 0
+        state.Inventory.numberOfInventoryLookupsPerformed = 0
         self.runEveryTwoSeconds()
         self.timer.start(2000)  # milliseconds
 
@@ -229,8 +228,8 @@ class NetworkStatus(QtGui.QWidget, RetranslateMixin):
     def runEveryTwoSeconds(self):
         """Updates counters, runs every 2 seconds if the timer is running"""
         self.labelLookupsPerSecond.setText(_translate("networkstatus", "Inventory lookups per second: %1").arg(
-            str(Inventory().numberOfInventoryLookupsPerformed / 2)))
+            str(state.Inventory.numberOfInventoryLookupsPerformed / 2)))
-        Inventory().numberOfInventoryLookupsPerformed = 0
+        state.Inventory.numberOfInventoryLookupsPerformed = 0
         self.updateNumberOfBytes()
         self.updateNumberOfObjectsToBeSynced()
 

src/class_objectProcessor.py

@@ -31,7 +31,6 @@ from bmconfigparser import config
 from fallback import RIPEMD160Hash
 from helper_sql import (
     sql_ready, sql_timeout, SqlBulkExecute, sqlExecute, sqlQuery)
-from inventory import Inventory
 from network import knownnodes
 from network.node import Peer
 from tr import _translate
@@ -736,7 +735,7 @@ class objectProcessor(threading.Thread):
             objectType, toStreamNumber, expiresTime = \
                 protocol.decodeObjectParameters(ackPayload)
             inventoryHash = highlevelcrypto.calculateInventoryHash(ackPayload)
-            Inventory()[inventoryHash] = (
+            state.Inventory[inventoryHash] = (
                 objectType, toStreamNumber, ackPayload, expiresTime, b'')
             queues.invQueue.put((toStreamNumber, inventoryHash))
 

src/class_singleCleaner.py

@@ -27,7 +27,6 @@ import queues
 import state
 from bmconfigparser import config
 from helper_sql import sqlExecute, sqlQuery
-from inventory import Inventory
 from network import BMConnectionPool, knownnodes, StoppableThread
 from tr import _translate
 
@@ -69,7 +68,7 @@ class singleCleaner(StoppableThread):
                 'updateStatusBar',
                 'Doing housekeeping (Flushing inventory in memory to disk...)'
             ))
-            Inventory().flush()
+            state.Inventory.flush()
             queues.UISignalQueue.put(('updateStatusBar', ''))
 
             # If we are running as a daemon then we are going to fill up the UI
@@ -82,7 +81,7 @@ class singleCleaner(StoppableThread):
             tick = int(time.time())
             if timeWeLastClearedInventoryAndPubkeysTables < tick - 7380:
                 timeWeLastClearedInventoryAndPubkeysTables = tick
-                Inventory().clean()
+                state.Inventory.clean()
                 queues.workerQueue.put(('sendOnionPeerObj', ''))
                 # pubkeys
                 sqlExecute(

src/class_singleWorker.py

@@ -28,7 +28,6 @@ import tr
 from addresses import decodeAddress, decodeVarint, encodeVarint
 from bmconfigparser import config
 from helper_sql import sqlExecute, sqlQuery
-from inventory import Inventory
 from network import knownnodes, StoppableThread
 from six.moves import configparser, queue
 
@@ -117,7 +116,7 @@ class singleWorker(StoppableThread):
         # For the case if user deleted knownnodes
         # but is still having onionpeer objects in inventory
         if not knownnodes.knownNodesActual:
-            for item in Inventory().by_type_and_tag(protocol.OBJECT_ONIONPEER):
+            for item in state.Inventory.by_type_and_tag(protocol.OBJECT_ONIONPEER):
                 queues.objectProcessorQueue.put((
                     protocol.OBJECT_ONIONPEER, item.payload
                 ))
@@ -288,7 +287,7 @@ class singleWorker(StoppableThread):
 
         inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
         objectType = 1
-        Inventory()[inventoryHash] = (
+        state.Inventory[inventoryHash] = (
             objectType, streamNumber, payload, embeddedTime, '')
 
         self.logger.info(
@@ -376,7 +375,7 @@ class singleWorker(StoppableThread):
 
         inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
         objectType = 1
-        Inventory()[inventoryHash] = (
+        state.Inventory[inventoryHash] = (
             objectType, streamNumber, payload, embeddedTime, '')
 
         self.logger.info(
@@ -467,7 +466,7 @@ class singleWorker(StoppableThread):
 
         inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
         objectType = 1
-        Inventory()[inventoryHash] = (
+        state.Inventory[inventoryHash] = (
             objectType, streamNumber, payload, embeddedTime,
             doubleHashOfAddressData[32:]
         )
@@ -503,7 +502,7 @@ class singleWorker(StoppableThread):
         objectPayload = encodeVarint(peer.port) + protocol.encodeHost(peer.host)
         tag = highlevelcrypto.calculateInventoryHash(objectPayload)
 
-        if Inventory().by_type_and_tag(objectType, tag):
+        if state.Inventory.by_type_and_tag(objectType, tag):
             return  # not expired
 
         payload = pack('>Q', embeddedTime)
@@ -516,7 +515,7 @@ class singleWorker(StoppableThread):
             payload, TTL, log_prefix='(For onionpeer object)')
 
         inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
-        Inventory()[inventoryHash] = (
+        state.Inventory[inventoryHash] = (
             objectType, streamNumber, buffer(payload),  # noqa: F821
             embeddedTime, buffer(tag)  # noqa: F821
         )
@@ -684,7 +683,7 @@ class singleWorker(StoppableThread):
 
             inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
             objectType = 3
-            Inventory()[inventoryHash] = (
+            state.Inventory[inventoryHash] = (
                 objectType, streamNumber, payload, embeddedTime, tag)
             self.logger.info(
                 'sending inv (within sendBroadcast function)'
@@ -843,7 +842,7 @@ class singleWorker(StoppableThread):
                                     hexlify(privEncryptionKey))
                             )
 
-                            for value in Inventory().by_type_and_tag(1, toTag):
+                            for value in state.Inventory.by_type_and_tag(1, toTag):
                                 # if valid, this function also puts it
                                 # in the pubkeys table.
                                 if protocol.decryptAndCheckPubkeyPayload(
@@ -1301,7 +1300,7 @@ class singleWorker(StoppableThread):
 
             inventoryHash = highlevelcrypto.calculateInventoryHash(encryptedPayload)
             objectType = 2
-            Inventory()[inventoryHash] = (
+            state.Inventory[inventoryHash] = (
                 objectType, toStreamNumber, encryptedPayload, embeddedTime, '')
             if config.has_section(toaddress) or \
                not protocol.checkBitfield(behaviorBitfield, protocol.BITFIELD_DOESACK):
@@ -1457,7 +1456,7 @@ class singleWorker(StoppableThread):
 
         inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
         objectType = 1
-        Inventory()[inventoryHash] = (
+        state.Inventory[inventoryHash] = (
             objectType, streamNumber, payload, embeddedTime, '')
         self.logger.info('sending inv (for the getpubkey message)')
         queues.invQueue.put((streamNumber, inventoryHash))

src/inventory.py

@@ -1,10 +1,9 @@
-"""The Inventory singleton"""
+"""The Inventory"""
 
 # TODO make this dynamic, and watch out for frozen, like with messagetypes
 import storage.filesystem
 import storage.sqlite
 from bmconfigparser import config
-from singleton import Singleton
 
 
 def create_inventory_instance(backend="sqlite"):
@@ -17,10 +16,9 @@ def create_inventory_instance(backend="sqlite"):
         "{}Inventory".format(backend.title()))()
 
 
-@Singleton
+class Inventory:
-class Inventory():
     """
-    Inventory singleton class which uses storage backends
+    Inventory class which uses storage backends
     to manage the inventory.
     """
     def __init__(self):

src/network/bmobject.py

@@ -7,7 +7,6 @@ import time
 import protocol
 import state
 from highlevelcrypto import calculateInventoryHash
-from inventory import Inventory
 from network.dandelion import Dandelion
 
 logger = logging.getLogger('default')
@@ -115,7 +114,7 @@ class BMObject(object):  # pylint: disable=too-many-instance-attributes
         # if it's a stem duplicate, pretend we don't have it
         if Dandelion().hasHash(self.inventoryHash):
             return
-        if self.inventoryHash in Inventory():
+        if self.inventoryHash in state.Inventory:
             raise BMObjectAlreadyHaveError()
 
     def checkObjectByType(self):

src/network/bmproto.py

@@ -17,7 +17,6 @@ import knownnodes
 import protocol
 import state
 from bmconfigparser import config
-from inventory import Inventory
 from queues import invQueue, objectProcessorQueue, portCheckerQueue
 from randomtrackingdict import RandomTrackingDict
 from network.advanceddispatcher import AdvancedDispatcher
@@ -356,7 +355,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             return True
 
         for i in map(str, items):
-            if i in Inventory() and not Dandelion().hasHash(i):
+            if i in state.Inventory and not Dandelion().hasHash(i):
                 continue
             if dandelion and not Dandelion().hasHash(i):
                 Dandelion().addHash(i, self)
@@ -421,12 +420,12 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             except KeyError:
                 pass
 
-        if self.object.inventoryHash in Inventory() and Dandelion().hasHash(
+        if self.object.inventoryHash in state.Inventory and Dandelion().hasHash(
                 self.object.inventoryHash):
             Dandelion().removeHash(
                 self.object.inventoryHash, "cycle detection")
 
-        Inventory()[self.object.inventoryHash] = (
+        state.Inventory[self.object.inventoryHash] = (
             self.object.objectType, self.object.streamNumber,
             buffer(self.payload[objectOffset:]), self.object.expiresTime,  # noqa: F821
             buffer(self.object.tag)  # noqa: F821

src/network/downloadthread.py

@@ -2,12 +2,11 @@
 `DownloadThread` class definition
 """
 import time
-
+import state
 import addresses
 import helper_random
 import protocol
 from dandelion import Dandelion
-from inventory import Inventory
 from network.connectionpool import BMConnectionPool
 from objectracker import missingObjects
 from threads import StoppableThread
@@ -61,7 +60,7 @@ class DownloadThread(StoppableThread):
                 payload = bytearray()
                 chunkCount = 0
                 for chunk in request:
-                    if chunk in Inventory() and not Dandelion().hasHash(chunk):
+                    if chunk in state.Inventory and not Dandelion().hasHash(chunk):
                         try:
                             del i.objectsNewToMe[chunk]
                         except KeyError:

src/network/tcp.py

@@ -17,7 +17,6 @@ import protocol
 import state
 from bmconfigparser import config
 from highlevelcrypto import randomBytes
-from inventory import Inventory
 from queues import invQueue, receiveDataQueue, UISignalQueue
 from tr import _translate
 
@@ -230,7 +229,7 @@ class TCPConnection(BMProto, TLSDispatcher):
             # may lock for a long time, but I think it's better than
             # thousands of small locks
             with self.objectsNewToThemLock:
-                for objHash in Inventory().unexpired_hashes_by_stream(stream):
+                for objHash in state.Inventory.unexpired_hashes_by_stream(stream):
                     # don't advertise stem objects on bigInv
                     if Dandelion().hasHash(objHash):
                         continue

src/network/uploadthread.py

@@ -5,7 +5,7 @@ import time
 
 import helper_random
 import protocol
-from inventory import Inventory
+import state
 from network.connectionpool import BMConnectionPool
 from network.dandelion import Dandelion
 from randomtrackingdict import RandomTrackingDict
@@ -50,7 +50,7 @@ class UploadThread(StoppableThread):
                         break
                     try:
                         payload.extend(protocol.CreatePacket(
-                            'object', Inventory()[chunk].payload))
+                            'object', state.Inventory[chunk].payload))
                         chunk_count += 1
                     except KeyError:
                         i.antiIntersectionDelay()

src/shutdown.py

@@ -9,7 +9,6 @@ from six.moves import queue
 import state
 from debug import logger
 from helper_sql import sqlQuery, sqlStoredProcedure
-from inventory import Inventory
 from network import StoppableThread
 from network.knownnodes import saveKnownNodes
 from queues import (
@@ -41,7 +40,7 @@ def doCleanShutdown():
         'updateStatusBar',
         'Flushing inventory in memory out to disk.'
         ' This should normally only take a second...'))
-    Inventory().flush()
+    state.Inventory.flush()
 
     # Verify that the objectProcessor has finished exiting. It should have
     # incremented the shutdown variable from 1 to 2. This must finish before

src/state.py

@@ -11,7 +11,7 @@ extPort = None
 socksIP = None
 """for Tor hidden service"""
 
-appdata = ''
+appdata = ""
 """holds the location of the application data storage directory"""
 
 shutdown = 0
@@ -59,7 +59,7 @@ numberOfMessagesProcessed = 0
 numberOfBroadcastsProcessed = 0
 numberOfPubkeysProcessed = 0
 
-statusIconColor = 'red'
+statusIconColor = "red"
 """
 GUI status icon color
 .. note:: bad style, refactor it
@@ -71,3 +71,29 @@ thisapp = None
 """Singleton instance"""
 
 backend_py3_compatible = False
+
+
+class Placeholder(object):  # pylint:disable=too-few-public-methods
+    """Placeholder class"""
+
+    def __init__(self, className):
+        self.className = className
+
+    def __getattr__(self, name):
+        self._raise()
+
+    def __setitem__(self, key, value):
+        self._raise()
+
+    def __getitem__(self, key):
+        self._raise()
+
+    def _raise(self):
+        raise NotImplementedError(
+            "Probabaly you forgot to initialize state variable for {}".format(
+                self.className
+            )
+        )
+
+
+Inventory = Placeholder("Inventory")

src/tests/test_api_thread.py

@@ -76,6 +76,8 @@ class TestAPIThread(TestPartialRun):
         """Call disseminatePreEncryptedMsg API command and check inventory"""
         import proofofwork
         from inventory import Inventory
+        import state
+        state.Inventory = Inventory()
 
         proofofwork.init()
         self.assertEqual(
@@ -87,7 +89,7 @@ class TestAPIThread(TestPartialRun):
         invhash = unhexlify(self.api.disseminatePreEncryptedMsg(
             hexlify(update_object).decode()
         ))
-        obj_type, obj_stream, obj_data = Inventory()[invhash][:3]
+        obj_type, obj_stream, obj_data = state.Inventory[invhash][:3]
         self.assertEqual(obj_type, 42)
         self.assertEqual(obj_stream, 2)
         self.assertEqual(sample_object_data[16:], obj_data[16:])