3 files changed, 72 insertions, 0 deletions
diff --git a/lib/longboat.rb b/lib/longboat.rb
new file mode 100644
index 0000000..0459cfc
--- /dev/null
+++ b/lib/longboat.rb
@@ -0,0 +1 @@
+require 'longboat/metrics'
diff --git a/lib/longboat/jobs.rb b/lib/longboat/jobs.rb
new file mode 100644
index 0000000..eadae03
--- /dev/null
+++ b/lib/longboat/jobs.rb
@@ -0,0 +1,28 @@
+module Longboat
+  module Jobs
+    class << self
+      def collect!
+        start_time = (Time.now - 15 * 60).strftime("%H:%M:%S")
+        raw = `sacct -a -P -o State -S #{start_time}`.lines.map(&:strip)[1..-1]
+
+        tally = Hash.new{0}
+
+        raw.each do |state|
+          tally[state] += 1
+        end
+
+        tally.each do |state, number|
+          Longboat::Metrics.report!(
+            "longboat_slurm_job_state",
+            number,
+            help: "Number of jobs in each state",
+            type: "gauge",
+            labels: {state: state}
+          )
+        end
+      end
+    end
+
+    Longboat::Metrics.register!(self)
+  end
+end
diff --git a/lib/longboat/metrics.rb b/lib/longboat/metrics.rb
new file mode 100644
index 0000000..58b1cbe
--- /dev/null
+++ b/lib/longboat/metrics.rb
@@ -0,0 +1,43 @@
+module Longboat
+  module Metrics
+    class << self
+      def report!(name, value, help: nil, type: nil, labels: {})
+        @metrics ||= {}
+        @metrics[name] ||= {help: help, type: type}
+        @metrics[name][labels] = value
+      end
+
+      def to_s
+        timestamp = (Time.now.to_f * 1000).to_i
+        res = ""
+        (@metrics || {}).each do |name, metric|
+          res << "#HELP #{name} #{metric[:help]}\n" unless metric[:help].nil?
+          res << "#TYPE #{name} #{metric[:type]}\n" unless metric[:type].nil?
+
+          metric.each do |labels, value|
+            next if labels == :help
+            next if labels == :type
+            labellist = []
+            labels.each do |k, v|
+              labellist << "#{k}=\"#{v}\""
+            end
+            labellist = labellist.join(",")
+            res << "#{name}{#{labellist}} #{value} #{timestamp}\n"
+          end
+        end
+        res
+      end
+
+      def register!(collector)
+        @collectors ||= []
+        @collectors << collector
+      end
+
+      def collect!
+        (@collectors || []).each do |collector|
+          collector.collect!
+        end
+      end
+    end
+  end
+end