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switch to class methods and ids to shorten the payload size of serialized delayed_jobs

Andrew Cantino 12 年之前
父節點
15b03fc40c
當前提交
eead335705
共有 5 個文件被更改，包括 98 次插入 和 83 次删除
顯示文件統計
  1. 1 2
      app/controllers/agents_controller.rb
  2. 75 63
      app/models/agent.rb
  3. 18 14
      spec/models/agent_spec.rb
  4. 3 3
      spec/models/agents/digest_email_agent_spec.rb
  5. 1 1
      spec/models/agents/trigger_agent_spec.rb

+ 1 - 2
app/controllers/agents_controller.rb
查看文件 

@@ -9,8 +9,7 @@ class AgentsController < ApplicationController
9 9 
   end
10 10
11 11 
   def run
12 
-    @agent = current_user.agents.find(params[:id])
13 
-    @agent.async_check
12 
+    Agent.async_check(current_user.agents.find(params[:id]).id)
14 13 
     redirect_to agents_path, notice: "Agent run queued"
15 14 
   end
16 15

+ 75 - 63
app/models/agent.rb
查看文件 

@@ -100,20 +100,6 @@ class Agent < ActiveRecord::Base
100 100 
     @memoized_last_event_at ||= events.select(:created_at).first.try(:created_at)
101 101 
   end
102 102
103 
-  def async_check
104 
-    check
105 
-    self.last_check_at = Time.now
106 
-    save!
107 
-  end
108 
-  handle_asynchronously :async_check #, :priority => 10, :run_at => Proc.new { 5.minutes.from_now }
109 
-
110 
-  def async_receive(event_ids)
111 
-    receive(Event.where(:id => event_ids))
112 
-    self.last_receive_at = Time.now
113 
-    save!
114 
-  end
115 
-  handle_asynchronously :async_receive #, :priority => 10, :run_at => Proc.new { 5.minutes.from_now }
116 
-
117 103 
   def default_schedule
118 104 
     self.class.default_schedule
119 105 
   end
 
@@ -135,67 +121,93 @@ class Agent < ActiveRecord::Base
135 121 
   end
136 122
137 123 
   # Class Methods
124 
+  class << self
125 
+    def cannot_be_scheduled!
126 
+      @cannot_be_scheduled = true
127 
+    end
138 128
139 
-  def self.cannot_be_scheduled!
140 
-    @cannot_be_scheduled = true
141 
-  end
142 
-
143 
-  def self.cannot_be_scheduled?
144 
-    !!@cannot_be_scheduled
145 
-  end
146 
-
147 
-  def self.default_schedule(schedule = nil)
148 
-    @default_schedule = schedule unless schedule.nil?
149 
-    @default_schedule
150 
-  end
151 
-
152 
-  def self.cannot_receive_events!
153 
-    @cannot_receive_events = true
154 
-  end
129 
+    def cannot_be_scheduled?
130 
+      !!@cannot_be_scheduled
131 
+    end
155 132
156 
-  def self.cannot_receive_events?
157 
-    !!@cannot_receive_events
158 
-  end
133 
+    def default_schedule(schedule = nil)
134 
+      @default_schedule = schedule unless schedule.nil?
135 
+      @default_schedule
136 
+    end
159 137
160 
-  def self.receive!
161 
-    sql = Agent.
162 
-            select("agents.id AS receiver_agent_id, sources.id AS source_agent_id, events.id AS event_id").
163 
-            joins("JOIN links ON (links.receiver_id = agents.id)").
164 
-            joins("JOIN agents AS sources ON (links.source_id = sources.id)").
165 
-            joins("JOIN events ON (events.agent_id = sources.id)").
166 
-            where("agents.last_checked_event_id IS NULL OR events.id > agents.last_checked_event_id").to_sql
138 
+    def cannot_receive_events!
139 
+      @cannot_receive_events = true
140 
+    end
167 141
168 
-    agents_to_events = {}
169 
-    Agent.connection.select_rows(sql).each do |receiver_agent_id, source_agent_id, event_id|
170 
-      agents_to_events[receiver_agent_id] ||= []
171 
-      agents_to_events[receiver_agent_id] << event_id
142 
+    def cannot_receive_events?
143 
+      !!@cannot_receive_events
172 144 
     end
173 145
174 
-    event_ids = agents_to_events.values.flatten.uniq.compact
146 
+    def receive!
147 
+      sql = Agent.
148 
+              select("agents.id AS receiver_agent_id, sources.id AS source_agent_id, events.id AS event_id").
149 
+              joins("JOIN links ON (links.receiver_id = agents.id)").
150 
+              joins("JOIN agents AS sources ON (links.source_id = sources.id)").
151 
+              joins("JOIN events ON (events.agent_id = sources.id)").
152 
+              where("agents.last_checked_event_id IS NULL OR events.id > agents.last_checked_event_id").to_sql
153 
+
154 
+      agents_to_events = {}
155 
+      Agent.connection.select_rows(sql).each do |receiver_agent_id, source_agent_id, event_id|
156 
+        agents_to_events[receiver_agent_id] ||= []
157 
+        agents_to_events[receiver_agent_id] << event_id
158 
+      end
159 
+
160 
+      event_ids = agents_to_events.values.flatten.uniq.compact
161 
+
162 
+      Agent.where(:id => agents_to_events.keys).each do |agent|
163 
+        agent.update_attribute :last_checked_event_id, event_ids.max
164 
+        Agent.async_receive(agent.id, agents_to_events[agent.id].uniq)
165 
+      end
166 
+
167 
+      {
168 
+          :agent_count => agents_to_events.keys.length,
169 
+          :event_count => event_ids.length
170 
+      }
171 
+    end
175 172
176 
-    Agent.where(:id => agents_to_events.keys).each do |agent|
177 
-      agent.update_attribute :last_checked_event_id, event_ids.max
178 
-      agent.async_receive(agents_to_events[agent.id].uniq)
173 
+    # Given an Agent id and an array of Event ids, load the Agent, call #receive on it with the Event objects, and then
174 
+    # save it with an updated _last_receive_at_ timestamp.
175 
+    #
176 
+    # This method is tagged with _handle_asynchronously_ and will be delayed and run with delayed_job.  It accepts Agent
177 
+    # and Event ids instead of a literal ActiveRecord models because it is preferable to serialize delayed_jobs with ids.
178 
+    def async_receive(agent_id, event_ids)
179 
+      agent = Agent.find(agent_id)
180 
+      agent.receive(Event.where(:id => event_ids))
181 
+      agent.last_receive_at = Time.now
182 
+      agent.save!
179 183 
     end
184 
+    handle_asynchronously :async_receive
180 185
181 
-    {
182 
-        :agent_count => agents_to_events.keys.length,
183 
-        :event_count => event_ids.length
184 
-    }
185 
-  end
186 
+    def run_schedule(schedule)
187 
+      types = where(:schedule => schedule).group(:type).pluck(:type)
188 
+      types.each do |type|
189 
+        type.constantize.bulk_check(schedule)
190 
+      end
191 
+    end
186 192
187 
-  def self.run_schedule(schedule)
188 
-    types = where(:schedule => schedule).group(:type).pluck(:type)
189 
-    types.each do |type|
190 
-      type.constantize.bulk_check(schedule)
193 
+    # You can override this to define a custom bulk_check for your type of Agent.
194 
+    def bulk_check(schedule)
195 
+      raise "Call #bulk_check on the appropriate subclass of Agent" if self == Agent
196 
+      where(:schedule => schedule).pluck("agents.id").each do |agent_id|
197 
+        async_check(agent_id)
198 
+      end
191 199 
     end
192 
-  end
193 200
194 
-  # You can override this to define a custom bulk_check for your type of Agent.
195 
-  def self.bulk_check(schedule)
196 
-    raise "Call #bulk_check on the appropriate subclass of Agent" if self == Agent
197 
-    where(:schedule => schedule).find_each do |agent|
198 
-      agent.async_check
201 
+    # Given an Agent id, load the Agent, call #check on it, and then save it with an updated _last_check_at_ timestamp.
202 
+    #
203 
+    # This method is tagged with _handle_asynchronously_ and will be delayed and run with delayed_job.  It accepts an Agent
204 
+    # id instead of a literal Agent because it is preferable to serialize delayed_jobs with ids.
205 
+    def async_check(agent_id)
206 
+      agent = Agent.find(agent_id)
207 
+      agent.check
208 
+      agent.last_check_at = Time.now
209 
+      agent.save!
199 210 
     end
211 
+    handle_asynchronously :async_check
200 212 
   end
201 213 
 end

+ 18 - 14
spec/models/agent_spec.rb
查看文件 

@@ -8,9 +8,11 @@ describe Agent do
8 8 
     end
9 9
10 10 
     it "runs agents with the given schedule" do
11 
-      mock.any_instance_of(Agents::WeatherAgent).async_check.twice
12 
-      mock.any_instance_of(Agents::WebsiteAgent).async_check.once
11 
+      weather_agent_ids = [agents(:bob_weather_agent), agents(:jane_weather_agent)].map(&:id)
12 
+      stub(Agents::WeatherAgent).async_check(anything) {|agent_id| weather_agent_ids.delete(agent_id) }
13 
+      stub(Agents::WebsiteAgent).async_check(agents(:bob_website_agent).id)
13 14 
       Agent.run_schedule("midnight")
15 
+      weather_agent_ids.should be_empty
14 16 
     end
15 17
16 18 
     it "groups agents by type" do
 
@@ -20,7 +22,7 @@ describe Agent do
20 22 
     end
21 23
22 24 
     it "only runs agents with the given schedule" do
23 
-      do_not_allow.any_instance_of(Agents::WebsiteAgent).async_check
25 
+      do_not_allow(Agents::WebsiteAgent).async_check
24 26 
       Agent.run_schedule("blah")
25 27 
     end
26 28 
   end
 
@@ -116,19 +118,21 @@ describe Agent do
116 118 
       end
117 119 
     end
118 120
119 
-    describe "#async_check" do
120 
-      it "records last_check_at and calls check" do
121 
+    describe ".async_check" do
122 
+      it "records last_check_at and calls check on the given Agent" do
121 123 
         @checker = Agents::SomethingSource.new(:name => "something")
122 124 
         @checker.user = users(:bob)
123 125 
         @checker.save!
124 126
125 
-        @checker.options[:new] = true
126 
-        mock(@checker).check.once
127 
+        mock(@checker).check.once {
128 
+          @checker.options[:new] = true
129 
+        }
127 130
128 
-        @checker.last_check_at.should be_nil
129 
-        @checker.async_check
130 
-        @checker.last_check_at.should be_within(2).of(Time.now)
131 
+        mock(Agent).find(@checker.id) { @checker }
131 132
133 
+        @checker.last_check_at.should be_nil
134 
+        Agents::SomethingSource.async_check(@checker.id)
135 
+        @checker.reload.last_check_at.should be_within(2).of(Time.now)
132 136 
         @checker.reload.options[:new].should be_true # Show that we save options
133 137 
       end
134 138 
     end
 
@@ -141,13 +145,13 @@ describe Agent do
141 145
142 146 
       it "should use available events" do
143 147 
         mock.any_instance_of(Agents::TriggerAgent).receive(anything).once
144 
-        agents(:bob_weather_agent).async_check
148 
+        Agent.async_check(agents(:bob_weather_agent).id)
145 149 
         Agent.receive!
146 150 
       end
147 151
148 152 
       it "should track when events have been seen and not see them again" do
149 153 
         mock.any_instance_of(Agents::TriggerAgent).receive(anything).once
150 
-        agents(:bob_weather_agent).async_check
154 
+        Agent.async_check(agents(:bob_weather_agent).id)
151 155 
         Agent.receive!
152 156 
         Agent.receive!
153 157 
       end
 
@@ -161,8 +165,8 @@ describe Agent do
161 165 
         mock.any_instance_of(Agents::TriggerAgent).receive(anything).twice { |events|
162 166 
           events.map(&:user).map(&:username).uniq.length.should == 1
163 167 
         }
164 
-        agents(:bob_weather_agent).async_check
165 
-        agents(:jane_weather_agent).async_check
168 
+        Agent.async_check(agents(:bob_weather_agent).id)
169 
+        Agent.async_check(agents(:jane_weather_agent).id)
166 170 
         Agent.receive!
167 171 
       end
168 172 
     end

+ 3 - 3
spec/models/agents/digest_email_agent_spec.rb
查看文件 

@@ -23,20 +23,20 @@ describe Agents::DigestEmailAgent do
23 23 
       event2.payload = "Something else you should know about"
24 24 
       event2.save!
25 25
26 
-      @checker.async_receive([event1.id, event2.id])
26 
+      Agents::DigestEmailAgent.async_receive(@checker.id, [event1.id, event2.id])
27 27 
       @checker.reload.memory[:queue].should == ["Something you should know about", "Something else you should know about"]
28 28 
     end
29 29 
   end
30 30
31 31 
   describe "#check" do
32 32 
     it "should send an email" do
33 
-      @checker.async_check
33 
+      Agents::DigestEmailAgent.async_check(@checker.id)
34 34 
       ActionMailer::Base.deliveries.should == []
35 35
36 36 
       @checker.memory[:queue] = ["Something you should know about", { :title => "Foo", :url => "http://google.com", :bar => 2 }, { "message" => "hi", :woah => "there" }]
37 37 
       @checker.save!
38 38
39 
-      @checker.async_check
39 
+      Agents::DigestEmailAgent.async_check(@checker.id)
40 40 
       ActionMailer::Base.deliveries.last.to.should == ["bob@example.com"]
41 41 
       ActionMailer::Base.deliveries.last.subject.should == "something interesting"
42 42 
       get_message_part(ActionMailer::Base.deliveries.last, /plain/).strip.should == "Something you should know about\n\nFoo (bar: 2 and url: http://google.com)\n\nhi (woah: there)"

+ 1 - 1
spec/models/agents/trigger_agent_spec.rb
查看文件 

@@ -50,7 +50,7 @@ describe Agents::TriggerAgent do
50 50 
       @event.save!
51 51
52 52 
       @checker.should_not be_working # no events have ever been received
53 
-      @checker.async_receive([@event.id])
53 
+      Agents::TriggerAgent.async_receive(@checker.id, [@event.id])
54 54 
       @checker.reload.should be_working # no events have ever been received
55 55 
       three_days_from_now = 3.days.from_now
56 56 
       stub(Time).now { three_days_from_now }