Module: CPEE

Defined in:
lib/cpee/fail.rb,
lib/cpee/redis.rb,
lib/cpee/message.rb,
lib/cpee/persistence.rb,
lib/cpee/statemachine.rb,
lib/cpee/value_helper.rb,
lib/cpee/implementation.rb,
lib/cpee/implementation_callbacks.rb,
lib/cpee/implementation_properties.rb,
lib/cpee/implementation_notifications.rb

Overview

This file is part of CPEE.

CPEE is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

CPEE is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with CPEE (file COPYING in the main directory). If not, see <www.gnu.org/licenses/>.

Defined Under Namespace

Modules: Callbacks, Message, Notifications, Persistence, Properties Classes: DeleteInstance, FAIL, Info, Instances, NewInstance, StateMachine, ValueHelper

Constant Summary collapse

SERVER = 
File.expand_path(File.join(__dir__,'..','cpee.xml'))
PROPERTIES_PATHS_FULL = 
%w{
  /p:properties/p:executionhandler
  /p:properties/p:positions/p:*
  /p:properties/p:positions/p:*/@*
  /p:properties/p:dataelements/p:*
  /p:properties/p:endpoints/p:*
  /p:properties/p:attributes/p:*
  /p:properties/p:transformation/p:*
  /p:properties/p:transformation/p:*/@*
  /p:properties/p:description
  /p:properties/p:dslx
  /p:properties/p:dsl
  /p:properties/p:status/p:id
  /p:properties/p:status/p:message
  /p:properties/p:state/@changed
  /p:properties/p:state
}
PROPERTIES_PATHS_INDEX_UNORDERED = 
%w{
  /p:properties/p:positions/p:*
}
PROPERTIES_PATHS_INDEX_ORDERED = 
%w{
  /p:properties/p:dataelements/p:*
  /p:properties/p:endpoints/p:*
  /p:properties/p:attributes/p:*
}

Class Method Summary collapse

Class Method Details

.cleanup_services(watchdog_start_off) ⇒ Object 



243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
 
# File 'lib/cpee/implementation.rb', line 243

def self::cleanup_services(watchdog_start_off)
  return if watchdog_start_off
  Dir[File.join(__dir__,'..','..','server','routing','*.pid')].each do |s|
    pid = (File.read(s).to_i rescue nil)
    if !pid.nil? || (Process.kill(0, pid) rescue false)
      f = s.sub(/(-(\d+))?\.pid$/,'.rb')
      if $2.nil?
        system "#{f} stop 1>/dev/null 2>&1"
      else
        system "#{f} -w #{$2} stop 1>/dev/null 2>&1"
      end
      puts "➡ Service #{File.basename(s,'.pid')} stopped ..."
    end
  end
end

.implementation(opts) ⇒ Object 



56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
 
# File 'lib/cpee/implementation.rb', line 56

def self::implementation(opts)
  opts[:see_instances]              ||= opts[:see_instances].nil? ? false : opts[:see_instances]

  opts[:instances]                  ||= File.expand_path(File.join(__dir__,'..','..','server','instances'))
  opts[:global_executionhandlers]   ||= File.expand_path(File.join(__dir__,'..','..','server','executionhandlers'))
  opts[:executionhandlers]          ||= ''
  opts[:topics]                     ||= File.expand_path(File.join(__dir__,'..','..','server','resources','topics.xml'))
  opts[:properties_init]            ||= File.expand_path(File.join(__dir__,'..','..','server','resources','properties.init'))
  opts[:properties_empty]           ||= File.expand_path(File.join(__dir__,'..','..','server','resources','properties.empty'))
  opts[:transformation_service]     ||= File.expand_path(File.join(__dir__,'..','..','server','resources','transformation.xml'))
  opts[:empty_dslx]                 ||= File.expand_path(File.join(__dir__,'..','..','server','resources','empty_dslx.xml'))
  opts[:notifications_init]         ||= File.expand_path(File.join(__dir__,'..','..','server','resources','notifications'))
  opts[:states]                     ||= File.expand_path(File.join(__dir__,'..','..','server','resources','states.xml'))
  opts[:watchdog_frequency]         ||= 7
  opts[:watchdog_start_off]         ||= false
  opts[:infinite_loop_stop]         ||= 10000
  opts[:workers]                    ||= 1
  opts[:workers_single]             ||= ['end','persist','forward-votes']
  opts[:workers_multi]              ||= ['forward-events']

  opts[:dashing_frequency]          ||= 3
  opts[:dashing_target]             ||= nil

  ### set redis_cmd to nil if you want to do global
  ### at least redis_path or redis_url and redis_db have to be set if you do global
  opts[:redis_path]                 ||= 'redis.sock' # use e.g. /tmp/redis.sock for global stuff. Look it up in your redis config
  opts[:redis_db]                   ||= 0
  ### optional redis stuff
  opts[:redis_url]                  ||= nil
  opts[:redis_cmd]                  ||= 'redis-server --port 0 --unixsocket #redis_path# --unixsocketperm 600 --pidfile #redis_pid# --dir #redis_db_dir# --dbfilename #redis_db_name# --databases 1 --save 900 1 --save 300 10 --save 60 10000 --rdbcompression yes --daemonize yes'
  opts[:redis_pid]                  ||= 'redis.pid' # use e.g. /var/run/redis.pid if you do global. Look it up in your redis config
  opts[:redis_db_name]              ||= 'redis.rdb' # use e.g. /var/lib/redis.rdb for global stuff. Look it up in your redis config

  CPEE::redis_connect opts, 'Server Main'

  opts[:sse_keepalive_frequency]    ||= 10
  opts[:sse_connections]            = {}

  opts[:statemachine]               = CPEE::StateMachine.new opts[:states], %w{running simulating finishing stopping abandoned finished} do |id|
    CPEE::Persistence::extract_item(id,opts,"state")
  end

  opts[:runtime_cmds]               << [
    "startclean", "Delete instances before starting.", Proc.new { |status|
      Dir.glob(File.expand_path(File.join(opts[:instances],'*'))).each do |d|
        FileUtils.rm_r(d) if File.basename(d) =~ /^\d+$/
      end
    }
  ]

  Proc.new do
    Dir[File.join(opts[:global_executionhandlers],'*','execution.rb')].each do |h|
      require h
    end unless opts[:global_executionhandlers].nil? || opts[:global_executionhandlers].strip == ''
    Dir[File.join(opts[:executionhandlers],'*','execution.rb')].each do |h|
      require h
    end unless opts[:executionhandlers].nil? || opts[:executionhandlers].strip == ''
    CPEE::Message::set_workers(opts[:workers])

    parallel do
      CPEE::watch_services(opts[:watchdog_start_off],opts[:redis_url],File.join(opts[:basepath],opts[:redis_path]),opts[:redis_db],opts[:workers],opts[:workers_single],opts[:workers_multi])
      EM.add_periodic_timer(opts[:watchdog_frequency]) do ### start services
        CPEE::watch_services(opts[:watchdog_start_off],opts[:redis_url],File.join(opts[:basepath],opts[:redis_path]),opts[:redis_db],opts[:workers],opts[:workers_single],opts[:workers_multi])
      end
      EM.defer do ### catch all sse connections
        CPEE::Notifications::sse_distributor(opts)
      end
      EM.add_periodic_timer(opts[:sse_keepalive_frequency]) do
        CPEE::Notifications::sse_heartbeat(opts)
      end

      if opts[:dashing_target]
        cpu_last = 0
        idl_last = 0
        EM.add_periodic_timer(opts[:dashing_frequency]) do
          src = `cat /proc/stat | head -n 1`.split("\n")
          srm = `cat /proc/meminfo`.split("\n")
          sc = {}
          sm = {}
          src.each do |e|
            x = e.split(' ')
            sc[x[0]] = x[1..-1].map{|r| r.to_i}
          end
          srm.each do |e|
            x = e.split(/\s+/)
            sm[x[0].chop] = x[1].to_i
          end
          scc = 0
          sci = 0
          sc.each do |_,e|
            scc = e[0..4].sum
            sci = e[3]
          end
          cpu_delta = scc - cpu_last
          cpu_idle  = sci - idl_last
          cpu_used  = cpu_delta - cpu_idle
          cpu_usage = '%.2f' % (100 * cpu_used / cpu_delta.to_f)
          mem_tot   = '%.1f' % (sm['MemTotal']/1024.0)
          mem_fre   = '%.1f' % (sm['MemFree']/1024.0)
          mem_ava   = '%.1f' % (sm['MemAvailable']/1024.0)
          mem_buc   = '%.1f' % ((sm['Buffers'] + sm['Cached'] + sm['SReclaimable'])/1024.0)
          mem_usd   = '%.1f' % ((sm['MemTotal'] - sm['MemFree'] - sm['Buffers'] - sm['Cached'] - sm['SReclaimable'])/1024.0)

          # puts "CPU usage at #{cpu_usage}%"
          # puts "Mem usage at #{mem_tot}/#{mem_fre}/#{mem_usd}/#{mem_buc}/#{mem_ava}"
          content = {}
          content['cpu_usage'] = cpu_usage
          content['mem_total'] = mem_tot
          content['mem_free'] = mem_fre
          content['mem_available'] = mem_ava
          content['mem_bufferedandcached'] = mem_buc
          content['mem_used'] = mem_usd
          CPEE::Message::send_url(:event,'node/resource_utilization',File.join(opts[:url],'/'),content,File.join(opts[:dashing_target],'/dash/events'))

          # Keep this as last for our next read
          idl_last = sci
          cpu_last = scc
        end
      end
    end

    cleanup do
      CPEE::cleanup_services(opts[:watchdog_start_off])
    end

    interface 'main' do
      run CPEE::Instances, opts if get '*'
      run CPEE::NewInstance, opts if post 'instance-new'
      on resource '\d+' do |r|
        run CPEE::Info, opts if get
        run CPEE::DeleteInstance, opts if delete
      end
    end

    interface 'properties' do |r|
      id = r[:h]['RIDDL_DECLARATION_PATH'].split('/')[1].to_i
      use CPEE::Properties::implementation(id.to_i, opts)
    end

    interface 'notifications' do |r|
      id = r[:h]['RIDDL_DECLARATION_PATH'].split('/')[1].to_i
      use CPEE::Notifications::implementation(id.to_i, opts)
    end

    interface 'callbacks' do |r|
      id = r[:h]['RIDDL_DECLARATION_PATH'].split('/')[1].to_i
      use CPEE::Callbacks::implementation(id.to_i, opts)
    end
  end
end

.redis_connect(opts, name = nil) ⇒ Object 



18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'lib/cpee/redis.rb', line 18

def self::redis_connect(opts,name=nil)
  if opts[:redis_cmd].nil?
    begin
      if opts[:redis_path]
        opts[:redis_dyn] = Proc.new { |name| Redis.new(path: opts[:redis_path], db: opts[:redis_db], id: name.gsub(/[^a-zA-Z0-9]/,'-') ) }
      elsif opts[:redis_url]
        opts[:redis_dyn] = Proc.new { |name| Redis.new(url: opts[:redis_url], db: opts[:redis_db], id: name.gsub(/[^a-zA-Z0-9]/,'-') ) }
      else
        raise
      end
      opts[:redis] = opts[:redis_dyn].call name.gsub(/[^a-zA-Z0-9]/,'-')
      opts[:redis].dbsize
    rescue
      puts 'can not connect to redis. check if it is running and cpee is configured correctly ...'
      exit
    end
  else # we always assume file socket if redis is startet locally
    opts[:redis_dyn] = Proc.new { |name| Redis.new(path: File.join(opts[:basepath],opts[:redis_path]), db: opts[:redis_db].to_i, id: name.gsub(/[^a-zA-Z0-9]/,'-') ) }
    tried = false
    begin
      opts[:redis] = opts[:redis_dyn].call name.gsub(/[^a-zA-Z0-9]/,'-')
      opts[:redis].dbsize
    rescue => e
      puts e
      res = unless tried
        rcmd = opts[:redis_cmd]
        rcmd.gsub! /#redis_path#/, File.join(opts[:basepath],opts[:redis_path])
        rcmd.gsub! /#redis_db_dir#/, opts[:basepath]
        rcmd.gsub! /#redis_db_name#/, opts[:redis_db_name]
        rcmd.gsub! /#redis_pid#/, File.join(opts[:basepath],opts[:redis_pid])
        puts 'starting redis ... it will keep running, just to let you know ...'
        system rcmd
      else
        true
      end
      if res
        tried = true
        puts 'waiting for successful start ...'
        sleep 1
        retry
      else
        puts 'can not start redis. check if cpee is configured correctly ...'
        exit
      end
    end
  end
end

.watch_services(watchdog_start_off, url, path, db, workers, workers_single, workers_multi) ⇒ Object 



207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
 
# File 'lib/cpee/implementation.rb', line 207

def self::watch_services(watchdog_start_off,url,path,db,workers,workers_single,workers_multi)
  return if watchdog_start_off
  EM.defer do
    workers_single.each do |s|
      s = File.join(__dir__,'..','..','server','routing',s)
      next if File.exist?(s + '.lock')
      pid = (File.read(s + '.pid').to_i rescue nil)
      if (pid.nil? || !(Process.kill(0, pid) rescue false))
        cmd = if url.nil?
          "-p \"#{path}\" -d #{db} -w #{workers} restart 1>/dev/null 2>&1"
        else
          "-u \"#{url}\" -d #{db} -w #{workers} restart 1>/dev/null 2>&1"
        end
        system "#{s}.rb " + cmd + " 1>/dev/null 2>&1"
        puts "➡ Service #{File.basename(s)} (#{cmd}) started ..."
      end
    end
    workers_multi.each do |s|
      s = File.join(__dir__,'..','..','server','routing',s.to_s)
      next if File.exist?(s + '.lock')
      (0...workers).each do |w|
        w = '%02i' % w
        pid = (File.read(s + '-' + w + '.pid').to_i rescue nil)
        if (pid.nil? || !(Process.kill(0, pid) rescue false))
          cmd = if url.nil?
            "-p \"#{path}\" -d #{db} -w #{w} restart"
          else
            "-u \"#{url}\" -d #{db} -w #{w} restart"
          end
          system "#{s}.rb " + cmd + " 1>/dev/null 2>&1"
          puts "➡ Service #{File.basename(s)}-#{w} (#{cmd}) started ..."
        end
      end
    end
  end
end