Class: Exec::ServiceConfGet

Inherits:
ExecutableCommand show all
Defined in:
lib/exec/service_conf_get.rb

Overview

Allows the user to get the properties of a service configuration.

Instance Attribute Summary

Attributes inherited from ExecutableCommand

#argv, #command_name, #logger, #options, #stderr, #stdin, #stdout, #values

Instance Method Summary collapse

Methods inherited from ExecutableCommand

#check_parameters, #create_logger, #run

Constructor Details

#initialize(argv, stdin, stdout, stderr, command_name) ⇒ ServiceConfGet

Default constructor.

Parameters:

  • argv —

    The arguments of the command.

  • stdin (IO) —

    The input stream of the command.

  • stdout (IO) —

    The output stream of the command.

  • stderr (IO) —

    The error stream of the command.

  • command_name (String) —

    The name of the executed command.

Author:

  • aboudot



28
29
30
31
 
# File 'lib/exec/service_conf_get.rb', line 28

def initialize(argv, stdin, stdout, stderr, command_name)
  super(argv, stdin, stdout, stderr, command_name)
  @configuration_directory = File.dirname(__FILE__) + "/../../resources/ambari-configurations"
end

Instance Method Details

#create_file(path, p) ⇒ Object (private)

Create a file configuration.

Parameters:

  • path —

    The path of the file.

  • p —

    The json data.

Author:

  • mbretaud



146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
 
# File 'lib/exec/service_conf_get.rb', line 146

def create_file(path, p)
  if File.exists?(path)
    raise Common::FileError.new("File already exists in #{path}!")
  else
    f = nil
    begin
      f = File.new(path.to_s, "w")
      f.puts(JSON.pretty_generate(p))
    rescue => e
      raise e
      return false
    else
      f.close()
    end
  end

  return true
end

#display_configurations(cluster_name = @values["cluster"], type_conf = @values["type"], tag_conf = @values["tag"], prefix = '') ⇒ Object (private)

display the configurations of a cluster.

Parameters:

  • cluster_name (defaults to: @values["cluster"]) —

    The name of the cluster.

  • prefix (defaults to: '') —

    The prefix to display.

Returns:

  • output The output string to display.

Author:

  • mbretaud



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
 
# File 'lib/exec/service_conf_get.rb', line 81

def display_configurations(cluster_name = @values["cluster"], type_conf = @values["type"], tag_conf = @values["tag"], prefix = '')
  @logger.begin_main_step("listConfigurations")
  begin
    properties = Array.new
    output = Array.new

    cmd = Command::AmbariGetClusterConfiguration.new(cluster_name, type_conf, tag_conf)

    data = cmd.exec()

    return "No properties available on the cluster '#{cluster_name}' with type '#{type_conf}' and tag '#{tag_conf}'.\n" if data.nil? || data.empty?

    data.each do |name, valeur|
      properties << "#{name} : #{valeur}\n"
    end
  rescue => e
    raise e
  end

  @logger.debug("configuration list output: #{output}")
  @logger.end_main_step("listConfigurations")

  properties = properties.sort

  output << ""
  output << "Configurations available on the cluster '#{cluster_name}' :"
  output << "\n\n"
  output << "#{prefix}Type : #{type_conf}\n"
  output << "#{prefix}Tag : #{tag_conf}\n"
  output << "\n"
  output << "#{prefix}[PROPERTIES : VALUE]\n"
  properties.each{|propertie|
    output << "#{prefix}#{propertie}"
  }
  output << "\n"

  return output
end

#exec ⇒ Object (private)

Execution of the command



46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
 
# File 'lib/exec/service_conf_get.rb', line 46

def exec()

  if !@values["cluster"].nil? && !@values["type"].nil? && !@values["tag"].nil? && @values["file"].nil?
    Color::print_log("NONE", "Display a configuration on the cluster '#{@values["cluster"]}'...", @stdout)

    output = display_configurations(@values["cluster"], @values["type"], @values["tag"], "\t - ")

    Color::echo_ok(@stdout)

    output.each{|conf|
      @stdout.print conf
    }
  elsif !@values["cluster"].nil? && !@values["type"].nil? && !@values["tag"].nil? && !@values["file"].nil?
    begin
      Color::print_log("NONE", "Save a configuration in file...", @stdout)

      if store_configuration(values["cluster"], @values["type"], @values["tag"], @values["file"])
        Color::echo_ok(@stdout)
      else
        Color::echo_fail(@stdout)
      end
    rescue => e
      @logger.debug(e.message)
      @logger.debug(e.backtrace.join('/n'))
      raise e
    end
  end
end

#set_options ⇒ Object (private)

Parse and check the parameters of the function.

Author:

  • aboudot



36
37
38
39
40
41
42
 
# File 'lib/exec/service_conf_get.rb', line 36

def set_options
  @logger.info("setting options")
  @options.add_option("C", "cluster", "The virtual cluster name where to get configuration.", true, true, method(:check_cluster_name))
  @options.add_option("T", "type", "The type that will be get.", true, true)
  @options.add_option("t", "tag", "The tag that will be get.", true, true)
  @options.add_option("f", "file", "The  the path and fileName where you save configuration.", false, true)
end

#store_configuration(cluster_name = @values["cluster"], type_conf = @values["type"], tag_conf = @values["tag"], file_name = nil) ⇒ Object

Store the configuration in a file

Parameters:

  • cluster_name (defaults to: @values["cluster"]) —

    The name of the cluster

  • type_conf (defaults to: @values["type"]) —

    The name of the type of the configuration

  • tag_conf (defaults to: @values["tag"]) —

    The name of the tag of the configuration

Author:

  • mbretaud



126
127
128
129
130
131
132
133
134
135
136
137
138
139
 
# File 'lib/exec/service_conf_get.rb', line 126

def store_configuration(cluster_name = @values["cluster"], type_conf = @values["type"], tag_conf = @values["tag"], file_name = nil)
  cmd=Command::AmbariGetClusterConfiguration.new(cluster_name, type_conf, tag_conf)

  data = cmd.exec()

  begin
    return true if create_file(file_name, data)
  rescue => e
    raise e
    return false
  end

  return true
end