Module: EventHub::Configuration

Extended by:
Configuration
Included in:
Configuration
Defined in:
lib/eventhub/configuration.rb

Overview

Configuraiton module

Instance Attribute Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *_args, &_block) ⇒ Object 



91
92
93
94
 
# File 'lib/eventhub/configuration.rb', line 91

def method_missing(name, *_args, &_block)
  @config_data[name.to_sym] ||
    fail(NoMethodError, "unknown configuration [#{name}]", caller)
end

Instance Attribute Details

#config_data ⇒ Object (readonly)

data from configuration file



12
13
14
 
# File 'lib/eventhub/configuration.rb', line 12

def config_data
  @config_data
end

#config_file ⇒ Object (readonly)

name of configuration file



11
12
13
 
# File 'lib/eventhub/configuration.rb', line 11

def config_file
  @config_file
end

#detached ⇒ Object (readonly)

run processor run as a daemon



10
11
12
 
# File 'lib/eventhub/configuration.rb', line 10

def detached
  @detached
end

#environment ⇒ Object (readonly)

environment the processor is running



9
10
11
 
# File 'lib/eventhub/configuration.rb', line 9

def environment
  @environment
end

#name ⇒ Object

name of processor



8
9
10
 
# File 'lib/eventhub/configuration.rb', line 8

def name
  @name
end

Instance Method Details

#deep_merge!(target, data) ⇒ Object

Deep merging of hashes deep_merge by Stefan Rusterholz, see www.ruby-forum.com/topic/142809



83
84
85
86
87
88
89
 
# File 'lib/eventhub/configuration.rb', line 83

def deep_merge!(target, data)
  return if data.nil?
  merger = proc do |_, v1, v2|
    v1.is_a?(Hash) && v2.is_a?(Hash) ? v1.merge(v2, &merger) : v2
  end
  target.merge! data, &merger
end

#default_configuration ⇒ Object 



96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
 
# File 'lib/eventhub/configuration.rb', line 96

def default_configuration
  {
    server: {
      user: 'guest',
      password: 'guest',
      host: 'localhost',
      vhost: 'event_hub',
      port: 5672,
      tls: false
    },
    processor: {
      heartbeat_cycle_in_s: 300,
      watchdog_cycle_in_s: 15,
      listener_queues: [@name]
    }
  }
end

#load!(args = {}) ⇒ Object

load configuration from file



63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
 
# File 'lib/eventhub/configuration.rb', line 63

def load!(args = {})
  # for better rspec testing
  @config_file = args[:config_file] if args[:config_file]
  @environment = args[:environment] if args[:environment]

  new_data = {}
  begin
    new_data = JSON.parse(File.read(@config_file), symbolize_names: true)
  rescue => e
    EventHub.logger.warn("Exception while loading configuration file: #{e}")
    EventHub.logger.info('Using default configuration values')
  end

  deep_merge!(@config_data, default_configuration)
  new_data = new_data[@environment.to_sym]
  deep_merge!(@config_data, new_data)
end

#parse_options(argv = ARGV) ⇒ Object

parse options from argument list



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
 
# File 'lib/eventhub/configuration.rb', line 34

def parse_options(argv = ARGV)
  @config_file = File.join(Dir.getwd, 'config', "#{@name}.json")

  OptionParser.new do |opts|
    note = 'Define environment'
    opts.on('-e', '--environment ENVIRONMENT', note) do |environment|
      @environment = environment
    end

    opts.on('-d', '--detached', 'Run processor detached as a daemon') do
      @detached = true
    end

    note = 'Define configuration file'
    opts.on('-c', '--config CONFIG', note) do |config|
      @config_file = config
    end
  end.parse!(argv)

  true
rescue OptionParser::InvalidOption => e
  EventHub.logger.warn("Argument Parsing: #{e}")
  false
rescue OptionParser::MissingArgument => e
  EventHub.logger.warn("Argument Parsing: #{e}")
  false
end

#reset ⇒ Object 



25
26
27
28
29
30
31
 
# File 'lib/eventhub/configuration.rb', line 25

def reset
  @name = 'undefined'
  @environment = 'development'
  @detached = false
  @config_file = File.join(Dir.getwd, 'config', "#{@name}.json")
  @config_data = {}
end