pick jobs from queue with lowest retries first

lib/App/Netdisco/DB/Result/Virtual/TastyJobs.pm

@@ -0,0 +1,86 @@
+package App::Netdisco::DB::Result::Virtual::TastyJobs;
+
+use strict;
+use warnings;
+
+use base 'DBIx::Class::Core';
+
+__PACKAGE__->table_class('DBIx::Class::ResultSource::View');
+
+__PACKAGE__->table('tasty_jobs');
+__PACKAGE__->result_source_instance->is_virtual(1);
+__PACKAGE__->result_source_instance->view_definition(<<ENDSQL
+  SELECT jobs.*, ds2.deferrals AS num_deferrals
+    FROM (
+      (SELECT me.*, 100 AS job_priority
+         FROM admin me
+        WHERE ( me.username IS NOT NULL OR me.action = ANY (string_to_array(btrim(?, '{"}'), '","')) )
+          AND me.device NOT IN
+              (SELECT ds.device
+                 FROM device_skip ds
+                WHERE ( me.action = ANY (ds.actionset) OR
+                        (ds.deferrals >= ? AND ds.last_defer > ( LOCALTIMESTAMP - ?::interval )) )
+                  AND ds.backend = ? AND ds.device = me.device)
+          AND me.status = 'queued'
+     ORDER BY random()
+        LIMIT ?)
+   UNION
+      (SELECT me.*, 0 AS job_priority
+         FROM admin me
+        WHERE NOT (me.action = ANY (string_to_array(btrim(?, '{"}'), '","')))
+          AND me.device NOT IN
+              (SELECT ds.device
+                 FROM device_skip ds
+                WHERE ( me.action = ANY (ds.actionset) OR
+                        (ds.deferrals >= ? AND ds.last_defer > ( LOCALTIMESTAMP - ?::interval )) )
+                  AND ds.backend = ? AND ds.device = me.device)
+          AND me.status = 'queued'
+     ORDER BY random()
+        LIMIT ?)
+    ) jobs
+    LEFT OUTER JOIN device_skip ds2
+      ON ds2.backend = ? AND ds2.device = jobs.device
+   ORDER BY jobs.job_priority DESC,
+            ds2.deferrals ASC NULLS FIRST
+   LIMIT ?
+ENDSQL
+);
+
+__PACKAGE__->add_columns(
+  "job",
+  { data_type => "integer", is_nullable => 0, },
+  "entered",
+  { data_type => "timestamp", is_nullable => 1 },
+  "started",
+  { data_type => "timestamp", is_nullable => 1 },
+  "finished",
+  { data_type => "timestamp", is_nullable => 1 },
+  "device",
+  { data_type => "inet", is_nullable => 1 },
+  "port",
+  { data_type => "text", is_nullable => 1 },
+  "action",
+  { data_type => "text", is_nullable => 1 },
+  "subaction",
+  { data_type => "text", is_nullable => 1 },
+  "status",
+  { data_type => "text", is_nullable => 1 },
+  "username",
+  { data_type => "text", is_nullable => 1 },
+  "userip",
+  { data_type => "inet", is_nullable => 1 },
+  "log",
+  { data_type => "text", is_nullable => 1 },
+  "debug",
+  { data_type => "boolean", is_nullable => 1 },
+  "device_key",
+  { data_type => "text", is_nullable => 1 },
+  "job_priority",
+  { data_type => "integer", is_nullable => 1 },
+  "num_deferrals",
+  { data_type => "integer", is_nullable => 1 },
+);
+
+__PACKAGE__->set_primary_key("job");
+
+1;