change how we calculate active jobs, probably will remove it from pa_job_engine, safer with threads I think. But, mostyle, added in client / server socket comms between web FE and job manager, with better job creation message (including link to job detail) and when you view job detail it auto-refreshes every few seconds until job complete)

job.py

@@ -7,6 +7,8 @@ from sqlalchemy.exc import SQLAlchemyError
 from status import st, Status
 from datetime import datetime, timedelta
 import pytz
+import socket
+from shared import PA_JOB_MANAGER_HOST, PA_JOB_MANAGER_PORT
 
 class Joblog(db.Model):
     id = db.Column(db.Integer, db.Sequence('ill_id_seq'), primary_key=True )
@@ -42,9 +44,8 @@ class Job(db.Model):
 # Utility classes for Jobs
 ################################################################################
 def GetNumActiveJobs():
-    ret = db.engine.execute("select num_active_jobs from pa_job_manager").first();
-    if( ret != None ):
-        return ret.num_active_jobs
+    ret = db.engine.execute("select count(1) from job where pa_job_state != 'Completed'").first()
+    return ret.count
 
 ###############################################################################
 # NewJob takes a name (which will be matched in pa_job_manager.py to run 
@@ -57,6 +58,17 @@ def NewJob(name, num_passes="1", num_files="0", wait_for=None ):
     db.session.add(job)
     db.session.commit()
 
+    try:
+        print("Waking up PA Job Manager")
+        s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        s.connect((PA_JOB_MANAGER_HOST, PA_JOB_MANAGER_PORT))
+        s.sendall(b'Hello, world')
+        s.close()
+    except Exception as e:
+        st.SetAlert("danger")
+        st.SetMessage("Failed to connect to job manager, has it crashed?  Exception was:{}".format(e))
+    return job
+
 ################################################################################
 # /jobs -> show current settings
 ################################################################################