Module: Cawcaw::Command::Database::Table::ClassMethods

Included in:
Cawcaw::Command::Database::Table
Defined in:
lib/cawcaw/command/database/table.rb

Instance Method Summary collapse

Instance Method Details

#count_table_sizes(full_table_paths, params) ⇒ Object 



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# File 'lib/cawcaw/command/database/table.rb', line 25

def count_table_sizes(full_table_paths, params)
  ActiveRecord::Base.establish_connection(params)
  count_sql = <<-EOF
#{
  full_table_paths.map{|full_table_path|
    "(select #{ActiveRecord::Base.sanitize(full_table_path)} as full_table_path, count(*) as record_size from #{full_table_path})"
  }.join(" union ")
}
  EOF
  results = ActiveRecord::Base.connection.execute count_sql
end

#get_full_table_paths(table_paths, params) ⇒ Object 



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# File 'lib/cawcaw/command/database/table.rb', line 17

def get_full_table_paths(table_paths, params)
  full_table_paths = {}
  table_paths.each do |table_path|
    full_table_paths[table_path] = table_path
  end
  return full_table_paths
end

#initialize_params(params) ⇒ Object 



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# File 'lib/cawcaw/command/database/table.rb', line 6

def initialize_params(params)
  params[:host] ||= "localhost"
  params[:adapter_name] ||= params[:adapter]
  
  params[:graph_title] ||= "#{params[:adapter_name]} Records"
  params[:graph_args] ||= "--base 1000"
  params[:graph_vlabel] ||= "records"
  params[:graph_category] ||= params[:adapter_name]
  params[:graph_info] ||= "#{params[:adapter_name]} record size"
end

#run(argv, input_stream = $stdin, output_stream = $stdout) ⇒ Object 



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# File 'lib/cawcaw/command/database/table.rb', line 37

def run(argv, input_stream=$stdin, output_stream=$stdout)
  
  params = Cawcaw.parse_opts(argv)
  self.initialize_params(params)
  bytes_flag = (params[:graph_vlabel] == "bytes")
  
  if params[:stdin_flag]
    table_paths = []
    while line = input_stream.gets
      line.chomp!
      table_paths.push line
    end
  else
    table_paths = argv.shift
    table_paths = table_paths.split(/,/) unless table_paths.nil?
    table_paths ||= []
    table_paths.delete("")
  end
  command = argv.shift
  
  if table_paths == []
    Cawcaw.logger.error("#{params[:adapter]} table name is not set")
    return 1
  end
  
  case command
  when "autoconf"
    output_stream.puts "yes"
  when "config"
    output_stream.puts <<-EOF
graph_title #{params[:graph_title]}
graph_args #{params[:graph_args]}
graph_vlabel #{params[:graph_vlabel]}
graph_category #{params[:graph_category]}
graph_info #{params[:graph_info]}
    EOF
    
    label_draw = "AREA"
    
    table_paths.each do |table_path|
      label = table_path.gsub(/[^a-zA-Z0-9]/, "_").downcase
      output_stream.puts <<-EOF
#{label}.label #{table_path}
#{label}.info #{table_path} size
#{label}.draw #{label_draw}
      EOF
      output_stream.puts "#{label}.warning #{params[:label_warning]}" if params[:label_warning]
      output_stream.puts "#{label}.critical #{params[:label_critical]}" if params[:label_critical]
      label_draw = "STACK"
    end
  else
    
    full_table_paths = self.get_full_table_paths(table_paths, params)
    return 1 if full_table_paths.nil?
    
    results = self.count_table_sizes(table_paths.map{|t|full_table_paths[t]}, params)
    
    table_sizes = {}
    results.each do |record|
      table_path = record[0] || record["full_table_path"]
      if bytes_flag
        table_sizes[table_path] = (record[2] || record["byte_size"]).to_i
      else
        table_sizes[table_path] = (record[1] || record["record_size"]).to_i
      end
    end
    table_paths.each do |table_path|
      label = table_path.gsub(/[^a-zA-Z0-9]/, "_").downcase
      table_size = table_sizes[full_table_paths[table_path]]
      output_stream.puts "#{label}.value #{table_size}"
    end
  end
  
  return 0
end