Handle different start and end times of components

• connect and _connect get an argument start_time that is to be passed to try_connect instead of self.time
• Connect helper pushes data twice: once for start_time and once for info.time (if it is not equal to start_time)
• Starting time can be passed to component's run(), and is auto-determined if not provided

Basically, only the changes in interfaces.py, schedule.py, component.py and connect_helper.py are of interest. The rest is fixes for the breaking change to the interface.

Fixes #4 (closed)

src/finam/tools/connect_helper.py

@@ -8,7 +8,7 @@ import xarray as xr
 from finam.interfaces import ComponentStatus, Loggable
 
 from ..data.tools import Info, strip_time
-from ..errors import FinamNoDataError
+from ..errors import FinamNoDataError, FinamTimeError
 from ..tools.log_helper import ErrorLogger
 
 
@@ -415,6 +415,9 @@ class ConnectHelper(Loggable):
             and all(v for v in self.infos_pushed.values())
             and all(v for v in self.data_pushed.values())
         ):
+            with ErrorLogger(self.logger):
+                _check_times(self.out_infos)
+
             return ComponentStatus.CONNECTED
 
         if any_done:
@@ -520,16 +523,19 @@ class ConnectHelper(Loggable):
         return any_done
 
     def _push_data(self, name, data, time, info_time):
-        if info_time != time:
+        out = self.outputs[name]
+        if out.is_static:
+            out.push_data(data, None)
+        elif info_time != time:
             if isinstance(data, xr.DataArray):
                 data_plain = strip_time(data)
-                self.outputs[name].push_data(data_plain, time)
-                self.outputs[name].push_data(copy.copy(data_plain), info_time)
+                out.push_data(data_plain, time)
+                out.push_data(copy.copy(data_plain), info_time)
             else:
-                self.outputs[name].push_data(data, time)
-                self.outputs[name].push_data(copy.copy(data), info_time)
+                out.push_data(data, time)
+                out.push_data(copy.copy(data), info_time)
         else:
-            self.outputs[name].push_data(data, info_time)
+            out.push_data(data, info_time)
 
         self.data_pushed[name] = True
         self._out_data_cache.pop(name)
@@ -537,6 +543,15 @@ class ConnectHelper(Loggable):
         return True
 
 
+def _check_times(infos):
+    t = None
+    for _, info in infos.items():
+        if t is None:
+            t = info.time
+        elif t != info.time:
+            raise FinamTimeError("Input infos have different starting times.")
+
+
 def _transfer_fields(source_info, target_info, fields):
     if len(fields) == 0:
         target_info.time = source_info.time