Refactor mass insert into SQLiteMassInsert context manager

[xsetbg.git] / xsetbg_db.py

diff --git a/xsetbg_db.py b/xsetbg_db.py
index e5fe5d0310927a0d2c5704f41cdd44cfffeff47d..dc23254cf386deb462a1c0b1dac90d8e4a07de56 100755 (executable)
--- a/xsetbg_db.py
+++ b/xsetbg_db.py
@@ -32,6 +32,27 @@ def recreate_db():
     return xsetbg_db
 
 
+class SQLiteMassInsert(object):
+    def __init__(self):
+        self.connection = sqlhub.processConnection
+
+    def __enter__(self):
+        connection = self.connection
+        connection.query("PRAGMA synchronous=OFF")
+        connection.query("PRAGMA count_changes=OFF")
+        connection.query("PRAGMA journal_mode=MEMORY")
+        connection.query("PRAGMA temp_store=MEMORY")
+
+        txn = connection.transaction()
+        sqlhub.processConnection = txn
+        return txn
+
+    def __exit__(self, *args, **kw):
+        sqlhub.processConnection.commit()
+        connection = sqlhub.processConnection = self.connection
+        connection.query("VACUUM %s" % xsetbg_db.sqlmeta.table)
+
+
 db_dirs = []
 try:
     xsetbg_db_path = xsetbg_conf.get('xsetbg', 'database')