Correct purge call, add missing lock module

chaind/adapters/fs.py

@@ -90,18 +90,18 @@ class ChaindFsAdapter(ChaindAdapter):
     def succeed(self, block, tx):
         if self.store.is_reserved(tx.hash):
             raise QueueLockError(tx.hash)
-
         r = self.store.final(tx.hash, block, tx, error=False)
-        self.store.purge(tx.hash)
+        (k, v) = self.store.get(tx.hash)
+        self.store.purge(k)
         return r
 
 
     def fail(self, block, tx):
         if self.store.is_reserved(tx.hash):
             raise QueueLockError(tx.hash)
-
         r = self.store.final(tx.hash, block, tx, error=True)
-        self.store.purge(tx.hash)
+        (k, v) = self.store.get(tx.hash)
+        self.store.purge(k)
         return r
 
 

chaind/lock.py

@@ -0,0 +1,34 @@
+# standard imports
+import time
+
+# local imports
+from .error import BackendError
+
+BASE_DELAY = 0.01
+BASE_DELAY_LIMIT = 3.0
+
+
+class StoreLock:
+
+    def __init__(self, delay=BASE_DELAY, delay_limit=BASE_DELAY_LIMIT, error=BackendError, description=None):
+        self.base_delay = delay
+        self.delay = delay
+        self.delay_limit = delay_limit
+        self.error = error
+        self.description = description
+
+    
+    def again(self, e=None):
+        if self.delay > self.delay_limit:
+            err = None
+            if e != None:
+                err = str(e)
+            else:
+                err = self.description
+            raise self.error(err)
+        time.sleep(self.delay)
+        self.delay *= 2
+
+
+    def reset(self):
+        self.delay = self.base_delay

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = chaind
-version = 0.2.2
+version = 0.2.3
 description = Base package for chain queue service
 author = Louis Holbrook
 author_email = dev@holbrook.no