patch 4.0

unittest/sql/optimizer/cost_model_utils/mylog/mylog.py

@@ -0,0 +1,43 @@
+import logging
+import sys
+
+class Singleton(object):
+    def __new__(cls, *args, **kw):
+        if not hasattr(cls, '_instance'):
+            orig = super(Singleton, cls)
+            cls._instance = orig.__new__(cls, *args, **kw)
+        return cls._instance
+
+
+class MyLogger(Singleton):
+    log = logging.getLogger(__name__)
+    ##set to stdout
+    fmt = '%(asctime)s - %(levelname)s - %(filename)s:%(lineno)s - %(name)s - %(message)s'
+    formatter = logging.Formatter(fmt)
+    out_hdlr = logging.StreamHandler(sys.stdout)
+    #handler = logging.handlers.RotatingFileHandler(LOG_FILE, maxBytes=1024 * 1024, backupCount=5)
+    out_hdlr.setFormatter(formatter)
+    out_hdlr.setLevel(logging.INFO)
+    log.addHandler(out_hdlr)
+    log.setLevel(logging.INFO)
+
+    @staticmethod
+    def get_logger():
+        return MyLogger.log
+
+    @staticmethod
+    def info(str, *args, **kargs):
+        MyLogger.log.info(str, *args, **kargs)
+
+    @staticmethod
+    def warn(str, *args, **kargs):
+        MyLogger.log.warn(str, *args, **kargs)
+
+    @staticmethod
+    def error(str, *args, **kargs):
+        MyLogger.log.error(str, *args, **kargs)
+
+if __name__ == '__main__':
+    MyLogger.get_logger().info("test")
+    MyLogger.get_logger().warn("test warn %s", 'test')
+    MyLogger.error("test error")