Class: LogwormTail

Inherits:
Object
  • Object
show all
Defined in:
lib/logworm_utils/tail.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(table, options) ⇒ LogwormTail

Returns a new instance of LogwormTail.



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# File 'lib/logworm_utils/tail.rb', line 2

def initialize(table, options)
  @table   = table
  @options = options

  begin
    @db    = Logworm::DB.from_config_or_die(@options[:app])
    @query = Logworm::QueryBuilder.new(@options.merge(:force_ts => true))
  rescue Exception => e
    $stderr.puts "Error: #{e}"
    exit(-1)
  end
end

Class Method Details

.list(options = {}) ⇒ Object 



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# File 'lib/logworm_utils/tail.rb', line 15

def self.list(options = {})
  begin
    @db    = Logworm::DB.from_config_or_die(options[:app])
    @tables = @db.tables
    if @tables and @tables.size > 0
      puts "The following are the tables that you've created thus far:"
      @tables.sort {|x,y| x["tablename"] <=> y["tablename"]}.each do |t| 
        puts "\t - #{t["tablename"]}, #{t["rows"]} rows, last updated on #{date_time(t["last_write"])}"
      end
    else
      puts "You haven't recorded any data yet."
    end
  rescue Exception => e
    $stderr.puts "Error: #{e}"
    exit(-1)
  end
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/logworm_utils/tail.rb', line 33

def run
  # Create a resource for the query
  begin
    query_data = @db.query(@table, @query.to_json)
    url = query_data["results_uri"]
  rescue Logworm::DatabaseException, Logworm::ForbiddenAccessException  => e
    $stderr.puts "Error: #{e}"
    exit(-1)
  rescue Logworm::InvalidQueryException => e
    $stderr.puts "#{e}"  
    exit(-1)
  rescue Exception  => e
    $stderr.puts "Error: #{e}"
    exit(-1)
  end

  if @options[:debug]
    puts "logworm query: #{@query.to_json}"
    puts "logworm query url: #{query_data["self_uri"]}"
    puts "logworm results url: #{url}"
    puts "refresh frequency: #{@options[:frequency]}" if @options[:loop]
    puts
  end
  
  while true do
    begin
      last_printed = print_rows(@db.results(url + "?nocache=1")["results"], last_printed || nil)
    rescue Logworm::DatabaseException, Logworm::ForbiddenAccessException  => e
      $stderr.puts "Error: #{e}"
      exit(-1)
    rescue Logworm::InvalidQueryException => e
      $stderr.puts "#{e}"  
      exit(-1)
    rescue Exception  => e
      $stderr.puts "Error: #{e}"
      exit(-1)
    end
    exit(0) unless @options[:loop]
    sleep @options[:frequency]
  end
end