Add configurable delay per client; improve try/catch

rattail_tempmon/db/alembic/versions/76d52bb064b8_add_client_delay.py

@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+"""add client delay
+
+Revision ID: 76d52bb064b8
+Revises: 7c7d205787b0
+Create Date: 2017-02-07 14:46:11.268920
+
+"""
+
+from __future__ import unicode_literals, absolute_import
+
+# revision identifiers, used by Alembic.
+revision = '76d52bb064b8'
+down_revision = u'7c7d205787b0'
+branch_labels = None
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+import rattail.db.types
+
+
+
+def upgrade():
+
+    # client
+    op.add_column('client', sa.Column('delay', sa.Integer(), nullable=True))
+
+
+def downgrade():
+
+    # client
+    op.drop_column('client', 'delay')