first commit

db/db.py

@@ -0,0 +1,87 @@
+from logging_config import get_logger
+
+logger = get_logger(__name__)
+
+class OracleDB:
+
+    def __init__(self, connector):
+        self.connector = connector
+
+    def fetch_all(self, sql, params=None):
+        conn = None
+        cur = None
+        try:
+            conn = self.connector.get_connection()
+            cur = conn.cursor()
+
+            cur.execute(sql, params or {})
+
+            cols = [c[0] for c in cur.description]
+            rows = [dict(zip(cols, r)) for r in cur.fetchall()]
+
+            logger.info("Fetched %s rows from database", len(rows))
+
+            return rows
+
+        except Exception:
+            logger.exception("Error in fetch_all")
+            raise
+
+        finally:
+            if cur:
+                cur.close()
+            if conn:
+                conn.close()
+
+    def execute(self, sql, params):
+        conn = None
+        cur = None
+        try:
+            conn = self.connector.get_connection()
+            cur = conn.cursor()
+
+            cur.execute(sql, params)
+            conn.commit()
+
+            logger.info("Insert/Update executed successfully")
+
+        except Exception:
+            if conn:
+                conn.rollback()
+            logger.exception("Error executing SQL")
+            raise
+
+        finally:
+            if cur:
+                cur.close()
+            if conn:
+                conn.close()
+
+    def call_procedure(self, name):
+        conn = None
+        cur = None
+        try:
+            conn = self.connector.get_connection()
+            cur = conn.cursor()
+
+            logger.info("Calling procedure %s", name)
+
+            try:
+                cur.callproc(name)
+            except Exception:
+                cur.execute(f"BEGIN {name}; END;")
+
+            conn.commit()
+
+            logger.info("Procedure executed successfully")
+            return True
+
+        except Exception:
+            logger.exception("Procedure call failed")
+            return False
+
+        finally:
+            if cur:
+                cur.close()
+            if conn:
+                conn.close()

db/oracle_connector.py

@@ -0,0 +1,23 @@
+import oracledb
+from logging_config import get_logger
+
+logger = get_logger(__name__)
+
+class OracleConnector:
+
+    def __init__(self, config):
+        self.config = config
+        self.pool = None
+
+    def get_connection(self):
+        if not self.pool:
+            logger.info("Initializing Oracle connection pool")
+            self.pool = oracledb.create_pool(
+                user=self.config.db_user,
+                password=self.config.db_password,
+                dsn=self.config.db_dsn,
+                min=1,
+                max=5,
+                increment=1
+            )
+        return self.pool.acquire()