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PyBitmessage/src/helper_sql.py

70 lines
1.7 KiB

import threading
import Queue
sqlSubmitQueue = Queue.Queue() #SQLITE3 is so thread-unsafe that they won't even let you call it from different threads using your own locks. SQL objects can only be called from one thread.
sqlReturnQueue = Queue.Queue()
sqlLock = threading.Lock()
def sqlQuery(sqlStatement, *args):
sqlLock.acquire()
sqlSubmitQueue.put(sqlStatement)
if args == ():
sqlSubmitQueue.put('')
elif type(args[0]) in [list, tuple]:
sqlSubmitQueue.put(args[0])
else:
sqlSubmitQueue.put(args)
queryreturn, rowcount = sqlReturnQueue.get()
sqlLock.release()
return queryreturn
def sqlExecute(sqlStatement, *args):
sqlLock.acquire()
sqlSubmitQueue.put(sqlStatement)
if args == ():
sqlSubmitQueue.put('')
else:
sqlSubmitQueue.put(args)
queryreturn, rowcount = sqlReturnQueue.get()
sqlSubmitQueue.put('commit')
sqlLock.release()
return rowcount
def sqlStoredProcedure(procName):
sqlLock.acquire()
sqlSubmitQueue.put(procName)
sqlLock.release()
class SqlBulkExecute:
def __enter__(self):
sqlLock.acquire()
return self
def __exit__(self, type, value, traceback):
sqlSubmitQueue.put('commit')
sqlLock.release()
def execute(self, sqlStatement, *args):
sqlSubmitQueue.put(sqlStatement)
if args == ():
sqlSubmitQueue.put('')
else:
sqlSubmitQueue.put(args)
sqlReturnQueue.get()
def query(self, sqlStatement, *args):
sqlSubmitQueue.put(sqlStatement)
if args == ():
sqlSubmitQueue.put('')
else:
sqlSubmitQueue.put(args)
return sqlReturnQueue.get()