mirror of
https://github.com/rembo10/headphones.git
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84 lines
2.1 KiB
Python
84 lines
2.1 KiB
Python
# Stolen from sick beards db.py.
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from __future__ import with_statement
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import os
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import sqlite3
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import threading
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import time
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import headphones
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from headphones import logger
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db_lock = threading.Lock()
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def dbFilename(filename="headphones.db"):
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return os.path.join(headphones.DATA_DIR, filename)
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class DBConnection:
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def __init__(self, filename="headphones.db"):
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self.filename = filename
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self.connection = sqlite3.connect(dbFilename(filename), 20)
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self.connection.row_factory = sqlite3.Row
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def action(self, query, args=None):
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with db_lock:
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if query == None:
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return
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sqlResult = None
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attempt = 0
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while attempt < 5:
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try:
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if args == None:
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#logger.debug(self.filename+": "+query)
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sqlResult = self.connection.execute(query)
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else:
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#logger.debug(self.filename+": "+query+" with args "+str(args))
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sqlResult = self.connection.execute(query, args)
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self.connection.commit()
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break
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except sqlite3.OperationalError, e:
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if "unable to open database file" in e.message or "database is locked" in e.message:
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logger.warn('Database Error: %s' % e)
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attempt += 1
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time.sleep(1)
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else:
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logger.error('Database error: %s' % e)
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raise
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except sqlite3.DatabaseError, e:
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logger.error('Fatal Error executing %s :: %s' % (query, e))
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raise
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return sqlResult
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def select(self, query, args=None):
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sqlResults = self.action(query, args).fetchall()
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if sqlResults == None:
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return []
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return sqlResults
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def upsert(self, tableName, valueDict, keyDict):
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changesBefore = self.connection.total_changes
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genParams = lambda myDict : [x + " = ?" for x in myDict.keys()]
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query = "UPDATE "+tableName+" SET " + ", ".join(genParams(valueDict)) + " WHERE " + " AND ".join(genParams(keyDict))
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self.action(query, valueDict.values() + keyDict.values())
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if self.connection.total_changes == changesBefore:
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query = "INSERT INTO "+tableName+" (" + ", ".join(valueDict.keys() + keyDict.keys()) + ")" + \
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" VALUES (" + ", ".join(["?"] * len(valueDict.keys() + keyDict.keys())) + ")"
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self.action(query, valueDict.values() + keyDict.values()) |