Class: Dexter::Client

Inherits:
Object
  • Object
show all
Extended by:
Logging
Includes:
Logging
Defined in:
lib/dexter/client.rb

Constant Summary

Constants included from Logging

Logging::COLOR_CODES

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Logging

colorize, log, output

Constructor Details

#initialize(args) ⇒ Client

Returns a new instance of Client.



14
15
16
 
# File 'lib/dexter/client.rb', line 14

def initialize(args)
  @arguments, @options = parse_args(args)
end

Instance Attribute Details

#arguments ⇒ Object (readonly)

Returns the value of attribute arguments.



6
7
8
 
# File 'lib/dexter/client.rb', line 6

def arguments
  @arguments
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



6
7
8
 
# File 'lib/dexter/client.rb', line 6

def options
  @options
end

Class Method Details

.start ⇒ Object 



8
9
10
11
12
 
# File 'lib/dexter/client.rb', line 8

def self.start
  Dexter::Client.new(ARGV).perform
rescue Dexter::Abort, PG::UndefinedFile => e
  abort colorize(e.message.strip, :red)
end

Instance Method Details

#parse_args(args) ⇒ Object 



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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
 
# File 'lib/dexter/client.rb', line 38

def parse_args(args)
  opts = Slop.parse(args) do |o|
    o.banner = %(Usage:
dexter [options])
    o.separator ""
    o.separator "Options:"
    o.boolean "--analyze", "analyze tables that haven't been analyzed in the past hour", default: false
    o.boolean "--create", "create indexes", default: false
    o.array "--exclude", "prevent specific tables from being indexed"
    o.string "--include", "only include specific tables"
    o.string "--input-format", "input format", default: "stderr"
    o.integer "--interval", "time to wait between processing queries, in seconds", default: 60
    o.boolean "--log-explain", "log explain", default: false, help: false
    o.string "--log-level", "log level", default: "info"
    o.boolean "--log-sql", "log sql", default: false
    o.float "--min-calls", "only process queries that have been called a certain number of times", default: 0
    o.float "--min-time", "only process queries that have consumed a certain amount of DB time, in minutes", default: 0
    o.integer "--min-cost-savings-pct", default: 50, help: false
    o.boolean "--pg-stat-activity", "use pg_stat_activity", default: false, help: false
    o.boolean "--pg-stat-statements", "use pg_stat_statements", default: false, help: false
    o.string "-s", "--statement", "process a single statement"
    o.string "--tablespace", "tablespace to create indexes"
    o.on "-v", "--version", "print the version" do
      log Dexter::VERSION
      exit
    end
    o.on "--help", "prints help" do
      log o
      exit
    end
    o.separator ""
    o.separator "Connection options:"
    o.string "-d", "--dbname", "database name"
    o.string "-h", "--host", "database host"
    o.integer "-p", "--port", "database port"
    o.string "-U", "--username", "database user"
  end

  arguments = opts.arguments
  options = opts.to_hash

  options[:dbname] = arguments.shift unless options[:dbname]

  # TODO don't use global var
  $log_level = options[:log_level].to_s.downcase
  raise Dexter::Abort, "Unknown log level" unless ["error", "info", "debug", "debug2", "debug3"].include?($log_level)

  [arguments, options]
rescue Slop::Error => e
  raise Dexter::Abort, e.message
end

#perform ⇒ Object 



18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
 
# File 'lib/dexter/client.rb', line 18

def perform
  STDOUT.sync = true
  STDERR.sync = true

  if options[:statement]
    query = Query.new(options[:statement])
    Indexer.new(options).process_queries([query])
  elsif options[:pg_stat_statements]
    # TODO support streaming option
    Indexer.new(options).process_stat_statements
  elsif options[:pg_stat_activity]
    Processor.new(:pg_stat_activity, options).perform
  elsif arguments.any?
    ARGV.replace(arguments)
    Processor.new(ARGF, options).perform
  else
    Processor.new(STDIN, options).perform
  end
end