Convert old clock triggers to wall_clock xtriggers.

CHANGES.md

@@ -9,6 +9,13 @@ creating a new release entry be sure to copy & paste the span tag with the
 `actions:bind` attribute, which is used by a regex to find the text to be
 updated. Only the first match gets replaced, so it's fine to leave the old
 ones in. -->
+-------------------------------------------------------------------------------
+## __cylc-8.2.0 (<span actions:bind='release-date'>Upcoming</span>)__
+
+### Enhancements
+
+[#5291](https://github.com/cylc/cylc-flow/pull/5291) - re-implement old-style
+clock triggers as wall_clock xtriggers.
 
 -------------------------------------------------------------------------------
 ## __cylc-8.2.0 (<span actions:bind='release-date'>Upcoming</span>)__

cylc/flow/cfgspec/workflow.py

@@ -720,10 +720,11 @@ def get_script_common_text(this: str, example: Optional[str] = None):
 
             .. deprecated:: 8.0.0
 
-               Please read :ref:`Section External Triggers` before
-               using the older clock triggers described in this section.
+               These are now auto-upgraded to the newer wall_clock xtriggers
+               (see :ref:`Section External Triggers`). The old way defining
+               clock-triggers will be removed in an upcoming Cylc version.
 
-            Clock-trigger tasks (see :ref:`ClockTriggerTasks`) wait on a wall
+            Clock-triggered tasks (see :ref:`ClockTriggerTasks`) wait on a wall
             clock time specified as an offset from their own cycle point.
 
             Example:

cylc/flow/config.py

@@ -113,7 +113,6 @@
     from optparse import Values
     from cylc.flow.cycling import IntervalBase, PointBase, SequenceBase
 
-
 RE_CLOCK_OFFSET = re.compile(
     rf'''
         ^
@@ -125,6 +124,7 @@
     ''',
     re.X,
 )
+
 RE_EXT_TRIGGER = re.compile(
     r'''
         ^
@@ -260,7 +260,6 @@ def __init__(
             'SequenceBase', Set[Tuple[str, str, bool, bool]]
         ] = {}
         self.taskdefs: Dict[str, TaskDef] = {}
-        self.clock_offsets = {}
         self.expiration_offsets = {}
         self.ext_triggers = {}  # Old external triggers (client/server)
         self.xtrigger_mgr = xtrigger_mgr
@@ -501,14 +500,10 @@ def __init__(
                             # (sub-family)
                             continue
                         result.append(member + extn)
-                        if s_type == 'clock-trigger':
-                            self.clock_offsets[member] = offset_interval
                         if s_type == 'clock-expire':
                             self.expiration_offsets[member] = offset_interval
                         if s_type == 'external-trigger':
                             self.ext_triggers[member] = ext_trigger_msg
-                elif s_type == 'clock-trigger':
-                    self.clock_offsets[name] = offset_interval
                 elif s_type == 'clock-expire':
                     self.expiration_offsets[name] = offset_interval
                 elif s_type == 'external-trigger':
@@ -555,6 +550,8 @@ def __init__(
                     raise WorkflowConfigError(
                         "external triggers must be used only once.")
 
+        self.upgrade_clock_triggers()
+
         self.leaves = self.get_task_name_list()
         for ancestors in self.runtime['first-parent ancestors'].values():
             try:
@@ -1746,7 +1743,6 @@ def generate_triggers(self, lexpression, left_nodes, right, seq,
                 )
 
         for label in xtrig_labels:
-
             try:
                 xtrig = self.cfg['scheduling']['xtriggers'][label]
             except KeyError:
@@ -2284,8 +2280,6 @@ def _get_taskdef(self, name: str) -> TaskDef:
 
         # TODO - put all taskd.foo items in a single config dict
 
-        if name in self.clock_offsets:
-            taskd.clocktrigger_offset = self.clock_offsets[name]
         if name in self.expiration_offsets:
             taskd.expiration_offset = self.expiration_offsets[name]
         if name in self.ext_triggers:
@@ -2436,3 +2430,34 @@ def check_for_owner(tasks: Dict) -> None:
             for task, _ in list(owners.items())[:5]:
                 msg += f'\n  * {task}"'
             raise WorkflowConfigError(msg)
+
+    def upgrade_clock_triggers(self):
+        """Convert old-style clock triggers to clock xtriggers.
+
+        [[special tasks]]
+           clock-trigger = foo(PT1D)
+
+        becomes:
+
+        [[xtriggers]]
+           _cylc_wall_clock_foo = wallclock(PT1D)
+
+        Not done by parsec upgrade because the graph has to be parsed first.
+        """
+        for item in self.cfg['scheduling']['special tasks']['clock-trigger']:
+            match = RE_CLOCK_OFFSET.match(item)
+            # (Already validated during "special tasks" parsing above.)
+            task_name, offset = match.groups()
+            # Derive an xtrigger label.
+            label = '_'.join(('_cylc', 'wall_clock', task_name))
+            # Define the xtrigger function.
+            xtrig = SubFuncContext(label, 'wall_clock', [], {})
+            xtrig.func_kwargs["offset"] = offset
+            if self.xtrigger_mgr is None:
+                XtriggerManager.validate_xtrigger(label, xtrig, self.fdir)
+            else:
+                self.xtrigger_mgr.add_trig(label, xtrig, self.fdir)
+            # Add it to the task, for each sequence that the task appears in.
+            taskdef = self.get_taskdef(task_name)
+            for seq in taskdef.sequences:
+                taskdef.add_xtrig_label(label, seq)

cylc/flow/data_messages.proto

@@ -194,12 +194,6 @@ message PbOutput {
     optional double time = 4;
 }
 
-message PbClockTrigger {
-    optional double time = 1;
-    optional string time_string = 2;
-    optional bool satisfied = 3;
-}
-
 message PbTrigger {
     optional string id = 1;
     optional string label = 2;
@@ -226,7 +220,6 @@ message PbTaskProxy {
     repeated string edges = 18;
     repeated string ancestors = 19;
     optional string flow_nums = 20;
-    optional PbClockTrigger clock_trigger = 22;
     map<string, PbTrigger> external_triggers = 23;
     map<string, PbTrigger> xtriggers = 24;
     optional bool is_queued = 25;

cylc/flow/data_store_mgr.py

@@ -105,8 +105,7 @@
 from cylc.flow.wallclock import (
     TIME_ZONE_LOCAL_INFO,
     TIME_ZONE_UTC_INFO,
-    get_utc_mode,
-    get_time_string_from_unix_time as time2str
+    get_utc_mode
 )
 
 if TYPE_CHECKING:
@@ -1282,12 +1281,6 @@ def _process_internal_task_proxy(self, itask, tproxy):
             output.satisfied = satisfied
             output.time = update_time
 
-        if itask.tdef.clocktrigger_offset is not None:
-            tproxy.clock_trigger.satisfied = itask.is_waiting_clock_done()
-            tproxy.clock_trigger.time = itask.clock_trigger_time
-            tproxy.clock_trigger.time_string = time2str(
-                itask.clock_trigger_time)
-
         for trig, satisfied in itask.state.external_triggers.items():
             ext_trig = tproxy.external_triggers[trig]
             ext_trig.id = trig
@@ -2098,40 +2091,6 @@ def delta_task_prerequisite(self, itask: TaskProxy) -> None:
         tp_delta.prerequisites.extend(prereq_list)
         self.updates_pending = True
 
-    def delta_task_clock_trigger(
-        self,
-        itask: TaskProxy,
-        check_items: Tuple,
-    ) -> None:
-        """Create delta for change in task proxy prereqs.
-
-        Args:
-            itask (cylc.flow.task_proxy.TaskProxy):
-                Update task-node from corresponding task proxy
-                objects from the workflow task pool.
-            check_items (tuple):
-                Collection of prerequisites checked to determine if
-                task is ready to run.
-
-        """
-        tp_id, tproxy = self.store_node_fetcher(itask.tokens)
-        if not tproxy:
-            return
-        if len(check_items) == 1:
-            return
-        _, clock, _ = check_items
-        # update task instance
-        if (
-            tproxy.HasField('clock_trigger')
-            and tproxy.clock_trigger.satisfied is not clock
-        ):
-            update_time = time()
-            tp_delta = self.updated[TASK_PROXIES].setdefault(
-                tp_id, PbTaskProxy(id=tp_id))
-            tp_delta.stamp = f'{tp_id}@{update_time}'
-            tp_delta.clock_trigger.satisfied = clock
-            self.updates_pending = True
-
     def delta_task_ext_trigger(
         self,
         itask: TaskProxy,

cylc/flow/network/schema.py

@@ -869,14 +869,6 @@ class Meta:
     time = Float()
 
 
-class ClockTrigger(ObjectType):
-    class Meta:
-        description = """Task clock-trigger"""
-    time = Float()
-    time_string = String()
-    satisfied = Boolean()
-
-
 class XTrigger(ObjectType):
     class Meta:
         description = """Task trigger"""
@@ -919,7 +911,6 @@ class Meta:
         limit=Int(default_value=0),
         satisfied=Boolean(),
         resolver=resolve_mapping_to_list)
-    clock_trigger = Field(ClockTrigger)
     external_triggers = graphene.List(
         XTrigger,
         description="""Task external trigger prerequisites.""",

cylc/flow/scheduler.py

@@ -1613,13 +1613,6 @@ async def main_loop(self) -> None:
                 ):
                     self.pool.queue_task(itask)
 
-                # Old-style clock-trigger tasks:
-                if (
-                    itask.tdef.clocktrigger_offset is not None
-                    and all(itask.is_ready_to_run())
-                ):
-                    self.pool.queue_task(itask)
-
             if housekeep_xtriggers:
                 # (Could do this periodically?)
                 self.xtrigger_mgr.housekeep(self.pool.get_tasks())

cylc/flow/scripts/show.py

@@ -117,10 +117,6 @@
       message
       satisfied
     }
-    clockTrigger {
-      timeString
-      satisfied
-    }
     externalTriggers {
       id
       label
@@ -327,19 +323,11 @@ async def prereqs_and_outputs_query(
                     info = f'{task_id} {output["label"]}'
                     print_msg_state(info, output['satisfied'])
                 if (
-                        t_proxy['clockTrigger']['timeString']
-                        or t_proxy['externalTriggers']
+                        t_proxy['externalTriggers']
                         or t_proxy['xtriggers']
                 ):
                     ansiprint(
                         "<bold>other:</bold> ('<red>-</red>': not satisfied)")
-                    if t_proxy['clockTrigger']['timeString']:
-                        state = t_proxy['clockTrigger']['satisfied']
-                        time_str = t_proxy['clockTrigger']['timeString']
-                        print_msg_state(
-                            'Clock trigger time reached',
-                            state)
-                        print(f'  o Triggers at ... {time_str}')
                     for ext_trig in t_proxy['externalTriggers']:
                         state = ext_trig['satisfied']
                         print_msg_state(

cylc/flow/task_pool.py

@@ -943,11 +943,6 @@ def reload_taskdefs(self) -> None:
                 # Already queued
                 continue
             ready_check_items = itask.is_ready_to_run()
-            # Use this periodic checking point for data-store delta
-            # creation, some items aren't event driven (i.e. clock).
-            if itask.tdef.clocktrigger_offset is not None:
-                self.data_store_mgr.delta_task_clock_trigger(
-                    itask, ready_check_items)
             if all(ready_check_items) and not itask.state.is_runahead:
                 self.queue_task(itask)
 

cylc/flow/task_proxy.py

@@ -19,7 +19,6 @@
 from collections import Counter
 from copy import copy
 from fnmatch import fnmatchcase
-from time import time
 from typing import (
     Any, Callable, Dict, List, Set, Tuple, Optional, TYPE_CHECKING
 )
@@ -51,7 +50,7 @@ class TaskProxy:
     Attributes:
         .clock_trigger_time:
             Clock trigger time in seconds since epoch.
-            (Used for both old-style clock triggers and wall_clock xtrigger).
+            (Used for wall_clock xtrigger).
         .expire_time:
             Time in seconds since epoch when this task is considered expired.
         .identity:
@@ -364,7 +363,7 @@ def is_ready_to_run(self) -> Tuple[bool, ...]:
         """Is this task ready to run?
 
         Takes account of all dependence: on other tasks, xtriggers, and
-        old-style ext- and clock-triggers. Or, manual triggering.
+        old-style ext-triggers. Or, manual triggering.
 
         """
         if self.is_manual_submit:
@@ -378,7 +377,6 @@ def is_ready_to_run(self) -> Tuple[bool, ...]:
             return (self.try_timers[self.state.status].is_delay_done(),)
         return (
             self.state(TASK_STATUS_WAITING),
-            self.is_waiting_clock_done(),
             self.is_waiting_prereqs_done()
         )
 
@@ -393,18 +391,6 @@ def set_summary_time(self, event_key, time_str=None):
             self.summary[event_key + '_time'] = float(str2time(time_str))
         self.summary[event_key + '_time_string'] = time_str
 
-    def is_waiting_clock_done(self):
-        """Is this task done waiting for its old-style clock trigger time?
-
-        Return True if there is no clock trigger or when clock trigger is done.
-        """
-        if self.tdef.clocktrigger_offset is None:
-            return True
-        return (
-            time() >
-            self.get_clock_trigger_time(str(self.tdef.clocktrigger_offset))
-        )
-
     def is_task_prereqs_not_done(self):
         """Are some task prerequisites not satisfied?"""
         return (not all(pre.is_satisfied()

cylc/flow/taskdef.py

@@ -115,7 +115,7 @@ class TaskDef:
         "run_mode", "rtconfig", "start_point", "initial_point", "sequences",
         "used_in_offset_trigger", "max_future_prereq_offset",
         "sequential", "is_coldstart",
-        "workflow_polling_cfg", "clocktrigger_offset", "expiration_offset",
+        "workflow_polling_cfg", "expiration_offset",
         "namespace_hierarchy", "dependencies", "outputs", "param_var",
         "graph_children", "graph_parents", "has_abs_triggers",
         "external_triggers", "xtrig_labels", "name", "elapsed_times"]
@@ -140,7 +140,6 @@ def __init__(self, name, rtcfg, run_mode, start_point, initial_point):
         self.sequential = False
         self.workflow_polling_cfg = {}
 
-        self.clocktrigger_offset = None
         self.expiration_offset = None
         self.namespace_hierarchy = []
         self.dependencies = {}

tests/flakyfunctional/cylc-show/00-simple.t

@@ -127,7 +127,6 @@ cmp_json "${TEST_NAME}-taskinstance" "${TEST_NAME}-taskinstance" \
             {"label": "succeeded", "message": "succeeded", "satisfied": false},
             {"label": "failed", "message": "failed", "satisfied": false}
         ],
-        "clockTrigger": {"timeString": "", "satisfied": false},
         "externalTriggers": [],
         "xtriggers": []
     }