bp-message-log-improvement (#1850)

* updated logging for messages from the background processor to hopefully make it easier to debug

* minor tweaks to message log

---------

Co-authored-by: jasquat <jasquat@users.noreply.github.com>

spiffworkflow-backend/src/spiffworkflow_backend/models/message_instance.py

@@ -125,10 +125,10 @@ class MessageInstanceModel(SpiffworkflowBaseDBModel):
             except Exception as e:
                 # the failure of a payload evaluation may not mean that matches for these
                 # message instances can't happen with other messages.  So don't error up.
-                # fixme:  Perhaps log some sort of error.
                 current_app.logger.warning(
-                    "Error evaluating correlation key when comparing send and receive messages."
-                    + f"Expression {correlation_key.retrieval_expression} failed with the error "
+                    "Error evaluating correlation key when comparing send and receive messages. "
+                    + f"Mesage name: '{self.name}'. Receive mesage id: '{self.id}'. "
+                    + f"Expression {correlation_key.retrieval_expression} failed with the error: "
                     + str(e)
                 )
                 return False

spiffworkflow-backend/src/spiffworkflow_backend/services/message_service.py

@@ -1,5 +1,6 @@
 from typing import Any
 
+from flask import current_app
 from flask import g
 from SpiffWorkflow.bpmn import BpmnEvent  # type: ignore
 from SpiffWorkflow.bpmn.specs.event_definitions.message import CorrelationProperty  # type: ignore
@@ -138,6 +139,10 @@ class MessageService:
         message_instances_send = MessageInstanceModel.query.filter_by(message_type="send", status="ready").all()
 
         for message_instance_send in message_instances_send:
+            current_app.logger.info(
+                f"Processor waiting send messages: Processing message id {message_instance_send.id}. "
+                f"Name: '{message_instance_send.name}'"
+            )
             cls.correlate_send_message(message_instance_send, execution_mode=execution_mode)
 
     @classmethod