Class: Fluent::MysqlAppenderMultiInput

Inherits:
Input
  • Object
show all
Defined in:
lib/fluent/plugin/in_mysql_appender_multi.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ MysqlAppenderMultiInput

Returns a new instance of MysqlAppenderMultiInput.



10
11
12
13
14
15
16
17
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 10

def initialize
  require 'mysql2'
  require 'time'
  require 'yaml'
  require 'td'
  require 'td-client'
  super
end

Instance Method Details

#configure(conf) ⇒ Object 



29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 29

def configure(conf)
  super
  @interval = Config.time_value(@interval)

  if @yaml_path.nil?
    raise Fluent::ConfigError, "mysql_appender_multi: missing 'yaml_path' parameter."
  end

  if !File.exist?(@yaml_path)
    raise Fluent::ConfigError, "mysql_appender_multi: No such file in 'yaml_path'."
  end

  if @tag.nil?
    raise Fluent::ConfigError, "mysql_appender_multi: missing 'tag' parameter. Please add following line into config like 'tag appender.${name}.${event}.${primary_key}'"
  end
end

#format_tag(config) ⇒ Object 



152
153
154
155
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 152

def format_tag(config)
  add_db = ENV.key?('TD_DATABASE') ? ENV['TD_DATABASE'] + '.' : ''
  "#{tag}.#{add_db}#{config['table_name']}"
end

#get_connection ⇒ Object 



157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 157

def get_connection
  begin
    return Mysql2::Client.new({
      :host => @host,
      :port => @port,
      :username => @username,
      :password => @password,
      :database => @database,
      :encoding => @encoding,
      :reconnect => true,
      :stream => true,
      :cache_rows => false
    })
  rescue Mysql2::Error => e
    $log.warn "mysql_appender_multi: #{e}"
    sleep @interval
    retry
  end
end

#get_lastid(config) ⇒ Object 



110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 110

def get_lastid(config)
  begin
    if !ENV.key?('TD_APIKEY') || !ENV.key?('TD_ENDPOINT') || !ENV.key?('TD_DATABASE') then
      return -1
    end
    cln = TreasureData::Client.new(ENV['TD_APIKEY'],{:endpoint => "https://" + ENV['TD_ENDPOINT']})
    table_exists = false
    cln.databases.each { |db|
      db.tables.each { |tbl|
        if tbl.db_name == ENV['TD_DATABASE'] && tbl.table_name == config['table_name'] then
            table_exists = true
            break
        end
      }
    }
    if table_exists then
      query = "SELECT MAX(#{config['primary_key']}) FROM #{config['table_name']}"
      job = cln.query(ENV['TD_DATABASE'], query, nil, nil, nil , {:type => :presto})
      until job.finished?
        sleep 2
        job.update_progress!
      end
      job.update_status!  # get latest info
      job.result_each { |row|
        $log.info  "mysql_appender_multi: #{ENV['TD_DATABASE']}.#{config['table_name']}'s last_id is #{row.first} "
        return row.first
      }
    else
      $log.info "mysql_appender_multi: #{ENV['TD_DATABASE']}.#{config['table_name']} is not found. "
      return -1
    end
  rescue => e
    $log.warn "mysql_appender_multi: failed to get lastid. #{config}"
    $log.error "error: #{e.message}"
    $log.error e.backtrace.join("\n")
  end
end

#get_query(config, last_id) ⇒ Object 



148
149
150
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 148

def get_query(config, last_id)
  "SELECT #{config['columns'].join(",")} FROM #{config['table_name']} where #{config['primary_key']} > #{last_id} order by #{config['primary_key']} asc limit #{config['limit']}"
end

#get_time(in_time) ⇒ Object 



177
178
179
180
181
182
183
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 177

def get_time(in_time)
  if in_time.kind_of?(Time) then
    in_time
  else
    Time.parse(in_time.to_s)
  end
end

#poll(config) ⇒ Object 



68
69
70
71
72
73
74
75
76
77
78
79
80
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
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 68

def poll(config)
  begin
    tag = format_tag(config)
    delay = Config.time_value(config['delay'] || 0)
    @mutex.synchronize {
      $log.info "mysql_appender_multi: polling start. :tag=>#{tag} :delay=>#{delay}"
    }
    last_id = get_lastid(config)
    loop do
      rows_count = 0
      start_time = Time.now
      db = get_connection
      db.query(get_query(config, last_id)).each do |row|
        if !config['entry_time'].nil? then
          entry_time = get_time(row[config['entry_time']])
          if (start_time - delay) > entry_time then
            if config['time_column'].nil? then
                td_time = Engine.now
            else
              td_time = get_time(row[config['time_column']]).to_i
            end
            row.each {|k, v| row[k] = v.to_s if v.is_a?(Time) || v.is_a?(Date) || v.is_a?(BigDecimal)}
            router.emit(tag, td_time, row)
            rows_count += 1
            last_id = row[config['primary_key']]
          end
        end
      end
      db.close
      elapsed_time = sprintf("%0.02f", Time.now - start_time)
      @mutex.synchronize {
        $log.info "mysql_appender_multi: finished execution :tag=>#{tag} :rows_count=>#{rows_count} :last_id=>#{last_id} :elapsed_time=>#{elapsed_time} sec"
      }
      sleep @interval
    end
  rescue => e
    $log.error "mysql_appender_multi: failed to execute query. :config=>#{masked_config}"
    $log.error "error: #{e.message}"
    $log.error e.backtrace.join("\n")
  end
end

#shutdown ⇒ Object 



62
63
64
65
66
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 62

def shutdown
  @threads.each do |thread|
    Thread.kill(thread)
  end
end

#start ⇒ Object 



46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
 
# File 'lib/fluent/plugin/in_mysql_appender_multi.rb', line 46

def start
  begin
    @threads = []
    @mutex = Mutex.new
    YAML.load_file(@yaml_path).each do |config|
      @threads << Thread.new {
        poll(config)
      }
    end
    $log.error "mysql_appender_multi: stop working due to empty configuration" if @threads.empty?
  rescue => e
    $log.error "error: #{e.message}"
    $log.error e.backtrace.join("\n")
  end
end