Change .get() return value to entire http response body

Extend get return value to a hash that also includes 'generationID', in addition to previously returned 'messages'

Author: zgalor

README.md

@@ -37,6 +37,10 @@ alerts = prometheus.get()
 
 alerts = prometheus.get(generation_id: '12497ca8-b597-4590-ac5d-d55af7f3d185', from_index: 34)
 
+Alerts will be returned in a Hash with following keys:
+* generationID
+* messages
+
 #### Posting alerts
 \# post an alert JSON to server
 

examples/get_alerts.rb

@@ -4,4 +4,6 @@
 prometheus = Prometheus::AlertBufferClient::Client.new(url: 'http://localhost:9099', path: '/topics/test')
 
 alerts = prometheus.get(generation_id: '12497ca8-b597-4590-ac5d-d55af7f3d185', from_index: 1)
-puts alerts
+
+puts "Generation Id: #{alerts['generationID']}"
+puts "Alerts: #{alerts['messages']}"

lib/prometheus/alert_buffer_client/client.rb

@@ -49,14 +49,17 @@ def initialize(options = {})
       # @option options [String] :generation_id Database generation Id.
       # @option options [Integer] :from_index Minimal index of alerts to fetch.
       #
+      # @return [Hash] response with keys: generationID, messages
       # All alerts will be fetched if options are omitted.
       def get(options = {})
         response = @client.get do |req|
           req.params['generationID'] = options[:generation_id]
           req.params['fromIndex'] = options[:from_index]
         end
 
-        JSON.parse(response.body)['messages']
+        JSON.parse(response.body)
+      rescue
+        raise RequestError, 'Bad response from server'
       end
 
       # post alert:

lib/prometheus/alert_buffer_client/version.rb

@@ -2,6 +2,6 @@
 
 module Prometheus
   module AlertBufferClient
-    VERSION = '0.1.0'
+    VERSION = '0.2.0'
   end
 end