allow caching with the demoting_error_warning property

tests/test_cache.py

@@ -559,6 +559,8 @@ async def test_cache_global_properties():
 
 @pytest.mark.asyncio
 async def test_callback_value_incr():
+    global incr
+    incr = -1
     val1 = IntOption('val1', "", Calculation(return_incr), properties=('expire',))
     val2 = IntOption('val2', "", Calculation(calc_value, Params(ParamOption(val1))))
     od1 = OptionDescription('rootconfig', '', [val1, val2])
@@ -579,3 +581,30 @@ async def test_callback_value_incr():
         assert await cfg.option('val1').value.get() == 2
         assert await cfg.option('val2').value.get() == 2
     assert not await list_sessions()
+
+
+@pytest.mark.asyncio
+async def test_callback_value_incr_demoting():
+    global incr
+    incr = -1
+    val1 = IntOption('val1', "", Calculation(return_incr), properties=('expire',))
+    val2 = IntOption('val2', "", Calculation(calc_value, Params(ParamOption(val1))))
+    od1 = OptionDescription('rootconfig', '', [val1, val2])
+    async with await Config(od1) as cfg:
+        await cfg.property.add('demoting_error_warning')
+        assert await cfg.cache.get_expiration_time() == 5
+        await cfg.cache.set_expiration_time(1)
+        assert await cfg.cache.get_expiration_time() == 1
+        await cfg.property.read_write()
+        assert await cfg.option('val1').value.get() == 1
+        sleep(1)
+        assert await cfg.option('val2').value.get() == 1
+        sleep(1)
+        assert await cfg.option('val1').value.get() == 1
+        assert await cfg.option('val2').value.get() == 1
+        sleep(2)
+        assert await cfg.option('val1').value.get() == 2
+        assert await cfg.option('val2').value.get() == 2
+        assert await cfg.option('val1').value.get() == 2
+        assert await cfg.option('val2').value.get() == 2
+    assert not await list_sessions()

tiramisu/option/option.py

@@ -333,7 +333,8 @@ class Option(BaseOption):
                             value: Any,
                             option_bag: OptionBag,
                             check_error: bool=True) -> None:
-        """
+        """Return True if value is really valid
+        If not validate or invalid return it returns False
         """
         config_bag = option_bag.config_bag
         force_index = option_bag.index
@@ -341,7 +342,7 @@ class Option(BaseOption):
 
         if check_error and config_bag is not undefined and \
                 not 'validator' in config_bag.properties:
-            return
+            return False
 
 
         def _is_not_unique(value, option_bag):
@@ -390,7 +391,7 @@ class Option(BaseOption):
                 raise ValueError(_('which must not be a list').format(_value,
                                                                       self.impl_get_display_name()))
             if isinstance(_value, Calculation) and config_bag is undefined:
-                return
+                return False
             if _value is not None:
                 if check_error:
                     # option validation
@@ -467,6 +468,8 @@ class Option(BaseOption):
                                                      err_index),
                                    ValueErrorWarning,
                                    self.__class__.__name__, 0)
+            return False
+        return True
 
     def _validate_calculator(self,
                             callback: Callable,

tiramisu/value.py

@@ -57,11 +57,12 @@ class Values:
                                     None,
                                     new=True)
 
+
     #______________________________________________________________________
     # get value
-
     async def get_cached_value(self,
-                               option_bag):
+                               option_bag: OptionBag,
+                               ) -> Any:
         """get value directly in cache if set
         otherwise calculated value and set it in cache
 
@@ -75,32 +76,34 @@ class Values:
                                                      option_bag.index,
                                                      setting_properties,
                                                      option_bag.properties,
-                                                     'value')
+                                                     'value',
-        # FIXME hu? validated or is_cached?
+                                                     )
-        if not validated:
         # no cached value so get value
+        if not is_cached:
             value = await self.getvalue(option_bag)
-            # validate value
+        # validates and warns value
+        if not validated:
+            validate = await option_bag.option.impl_validate(value,
+                                                             option_bag,
+                                                             check_error=True,
+                                                             )
+        if 'warnings' in setting_properties:
             await option_bag.option.impl_validate(value,
                                                   option_bag,
-                                                  check_error=True)
+                                                  check_error=False,
-            # store value in cache
+                                                  )
-            validator = 'validator' in setting_properties and 'demoting_error_warning' not in setting_properties
+        # set value to cache
-            if not is_cached or validator:
+        if not is_cached:
             cache.setcache(option_bag.path,
                            option_bag.index,
                            value,
                            option_bag.properties,
                            setting_properties,
-                               validator)
+                           validate,
-        if 'warnings' in setting_properties:
+                           )
-            await option_bag.option.impl_validate(value,
-                                                  option_bag,
-                                                  check_error=False)
         if isinstance(value, list):
             # return a copy, so value cannot be modified
-            from copy import copy
+            value = value.copy()
-            value = copy(value)
         # and return it
         return value