Class: Flydata::SyncFileManager

Inherits:
Object
  • Object
show all
Defined in:
lib/flydata/sync_file_manager.rb

Constant Summary collapse

DUMP_DIR = 
ENV['FLYDATA_DUMP'] || File.join(FLYDATA_HOME, 'dump')
BACKUP_DIR = 
ENV['FLYDATA_BACKUP'] || File.join(FLYDATA_HOME, 'backup')
TABLE_POSITIONS_DIR = 
ENV['FLYDATA_TABLE_POSITIONS'] || File.join(FLYDATA_HOME, 'positions')
SYNC_TABLE_POSITIONS = 
0

Instance Method Summary collapse

Constructor Details

#initialize(data_entry) ⇒ SyncFileManager

Returns a new instance of SyncFileManager.



11
12
13
14
15
 
# File 'lib/flydata/sync_file_manager.rb', line 11

def initialize(data_entry)
  @data_entry = data_entry
  @table_position_files = {} # File objects keyed by table name
  @sync_table_positions_count = SYNC_TABLE_POSITIONS
end

Instance Method Details

#backup_dir ⇒ Object 



346
347
348
 
# File 'lib/flydata/sync_file_manager.rb', line 346

def backup_dir
  BACKUP_DIR
end

#backup_dump_dir ⇒ Object 



338
339
340
341
342
343
344
 
# File 'lib/flydata/sync_file_manager.rb', line 338

def backup_dump_dir
  backup_dir = BACKUP_DIR.dup
  FileUtils.mkdir_p(backup_dir) unless Dir.exists?(backup_dir)
  dest_dir = File.join(backup_dir, Time.now.strftime("%Y%m%d%H%M%S"))
  FileUtils.mkdir(dest_dir)
  FileUtils.mv(Dir.glob("#{dump_dir}/*"), dest_dir)
end

#binlog_path ⇒ Object 



107
108
109
 
# File 'lib/flydata/sync_file_manager.rb', line 107

def binlog_path
  File.join(FLYDATA_HOME, @data_entry['name'] + ".binlog.pos")
end

#close ⇒ Object 



17
18
19
20
 
# File 'lib/flydata/sync_file_manager.rb', line 17

def close
  @table_position_files.values.each {|f| f.close }
  @table_position_files = {}
end

#delete_dump_file ⇒ Object 



334
335
336
 
# File 'lib/flydata/sync_file_manager.rb', line 334

def delete_dump_file
  FileUtils.rm(dump_file_path) if File.exists?(dump_file_path)
end

#delete_table_binlog_pos(table_name) ⇒ Object 



288
289
290
291
292
293
294
295
 
# File 'lib/flydata/sync_file_manager.rb', line 288

def delete_table_binlog_pos(table_name)
  file = File.join(table_positions_dir_path, table_name + ".binlog.pos")
  if File.exists?(file)
    FileUtils.rm(file, :force => true)
  else
    puts "#{file} does not exist. Something is wrong. Did you delete the file manually when flydata was running?"
  end
end

#dump_file_path ⇒ Object 



22
23
24
 
# File 'lib/flydata/sync_file_manager.rb', line 22

def dump_file_path
  File.join(dump_dir, @data_entry['name']) + ".dump"
end

#dump_pos_path ⇒ Object

dump pos file for resume



27
28
29
 
# File 'lib/flydata/sync_file_manager.rb', line 27

def dump_pos_path
  dump_file_path + ".pos"
end

#get_new_table_list(tables, file_type) ⇒ Object 



72
73
74
75
76
77
78
79
 
# File 'lib/flydata/sync_file_manager.rb', line 72

def get_new_table_list(tables, file_type)
  table_positions_dir_path = ENV['FLYDATA_TABLE_POSITIONS'] || File.join(FLYDATA_HOME, 'positions')
  new_tables = []
  tables.each do |table|
    new_tables << table unless File.exists?(File.join(table_positions_dir_path, "#{table}.#{file_type}"))
  end
  new_tables
end

#get_table_binlog_pos(table_name) ⇒ Object 



313
314
315
316
317
 
# File 'lib/flydata/sync_file_manager.rb', line 313

def get_table_binlog_pos(table_name)
  file = File.join(table_positions_dir_path, table_name + ".binlog.pos")
  return nil unless File.exists?(file)
  File.open(file, 'r').readline
end

#get_table_binlog_pos_init(table_name) ⇒ Object 



251
252
253
254
255
 
# File 'lib/flydata/sync_file_manager.rb', line 251

def get_table_binlog_pos_init(table_name)
  file = File.join(table_positions_dir_path, table_name + ".binlog.pos.init")
  return nil unless File.exists?(file)
  File.open(file, 'r').readline
end

#get_table_position(table_name) ⇒ Object 



227
228
229
230
231
232
 
# File 'lib/flydata/sync_file_manager.rb', line 227

def get_table_position(table_name)
  file = File.join(table_positions_dir_path, table_name + ".pos")
  return nil unless File.exists?(file)

  File.open(file) {|f| f.read}
end

#increment_and_save_table_position(table_name) {|seq| ... } ⇒ Object

Read a sequence number from the table’s position file, increment the number and pass the number to a block. After executing the block, saves the value to the position file.

Yields:

  • (seq) 


183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
 
# File 'lib/flydata/sync_file_manager.rb', line 183

def increment_and_save_table_position(table_name)
  file = File.join(table_positions_dir_path, table_name + ".pos")
  retry_count = 0
  begin
    @table_position_files[table_name] ||= (f = File.open(file, File::RDWR); f.sync = true; f)
  rescue Errno::ENOENT
    raise if retry_count > 0 # Already retried.  Must be a differentfile causing the error
    # File not exist.  Create one with initial value of '0'
    File.open(file, "w") {|f| f.write('0') }
    retry_count += 1
    retry
  end
  f = @table_position_files[table_name]
  seq = f.read
  prev_seq_len = seq.size
  f.rewind
  seq = seq.to_i + 1
  seq = FlydataCore::QueryJob::SYNC_FIRST_SEQ if seq == 1
  new_seq_len = seq.to_s.size

  seq_to_write =  seq.to_s
  if new_seq_len < prev_seq_len
    seq_to_write += " " * (prev_seq_len - new_seq_len)
  end
  # logical transaction starts
  yield(seq)
  f.write(seq_to_write)
  if @sync_table_positions_count > 1
    @sync_table_positions_count -= 1
  elsif @sync_table_positions_count == 1
    f.fsync
    @sync_table_positions_count = SYNC_TABLE_POSITIONS
  end
  # logical transaction ends
  f.truncate(new_seq_len) if new_seq_len < prev_seq_len
  f.rewind
end

#increment_table_rev(table_name, base_rev) ⇒ Object 



279
280
281
282
283
284
285
286
 
# File 'lib/flydata/sync_file_manager.rb', line 279

def increment_table_rev(table_name, base_rev)
  file = table_rev_file_path(table_name)
  new_rev = base_rev + 1
  File.open(file, "w") do |f|
    f.write(new_rev)
  end
  new_rev
end

#install_table_binlog_files(tables) ⇒ Object 



319
320
321
322
323
324
325
326
327
328
329
330
331
332
 
# File 'lib/flydata/sync_file_manager.rb', line 319

def install_table_binlog_files(tables)
  FileUtils.mkdir_p(table_positions_dir_path) unless Dir.exists?(table_positions_dir_path)
  tables.each do |table_name|
    file_name = table_name + ".binlog.pos"
    src_file = File.join(dump_dir, file_name)
    if ! File.exists?(src_file)
      raise "#{src_file} does not exist. Error!!"
    end
    FileUtils.mv(src_file, table_positions_dir_path)
    # save the position at initial sync.  this is used for repair if
    # necessary.
    FileUtils.cp(File.join(table_positions_dir_path, file_name), File.join(table_positions_dir_path, file_name + ".init"))
  end
end

#load_binlog(file_path = binlog_path) ⇒ Object 



100
101
102
103
104
105
 
# File 'lib/flydata/sync_file_manager.rb', line 100

def load_binlog(file_path = binlog_path)
  return nil unless File.exists?(file_path)
  f, pos = IO.read(file_path).strip.split("\t")
  return nil if f.nil? || f.empty? || pos.nil?
  { binfile: f, pos: pos.to_i }
end

#load_dump_pos ⇒ Object 



37
38
39
40
41
42
43
44
45
46
 
# File 'lib/flydata/sync_file_manager.rb', line 37

def load_dump_pos
  path = dump_pos_path
  return {} unless File.exists?(path)
  items = File.open(path, 'r').readline.split("\t")
  raise "Invalid dump.pos file: #{path}" unless items.length >= 5 && items.length <= 7
  mysql_table = load_mysql_table_marshal_dump
  { status: items[0], table_name: items[1], last_pos: items[2].to_i,
    binlog_pos: {binfile: items[3], pos: items[4].to_i},
    state: items[5], substate: items[6], mysql_table: mysql_table}
end

#load_generated_ddl(tables) ⇒ Object 



48
49
50
51
52
53
54
55
56
57
58
 
# File 'lib/flydata/sync_file_manager.rb', line 48

def load_generated_ddl(tables)
  tables = [ tables ] unless tables.kind_of?(Array)
  paths = table_ddl_file_paths(*tables)
  paths.collect{|path|
    begin
      File.open(path) {|f| f.read }
    rescue Errno::ENOENT
      nil
    end
  }
end

#load_sent_binlog(file_path = sent_binlog_path) ⇒ Object 



118
119
120
121
122
123
 
# File 'lib/flydata/sync_file_manager.rb', line 118

def load_sent_binlog(file_path = sent_binlog_path)
  return nil unless File.exists?(file_path)
  f, pos = IO.read(file_path).strip.split("\t")
  return nil if f.nil? || f.empty? || pos.nil?
  { binfile: f, pos: pos.to_i }
end

#load_stats ⇒ Object 



360
361
362
363
 
# File 'lib/flydata/sync_file_manager.rb', line 360

def load_stats
  return nil unless File.exists?(stats_path)
  Hash[*File.read(stats_path).split(/\t/)]
end

#load_sync_info ⇒ Object 



244
245
246
247
248
249
 
# File 'lib/flydata/sync_file_manager.rb', line 244

def load_sync_info
  return nil unless File.exists?(sync_info_file)
  items = File.open(sync_info_file, 'r').readline.split("\t")
  { initial_sync: (items[0] == 'true'),
    tables: items[1].split(" ") }
end

#mysql_table_marshal_dump_path ⇒ Object

MysqlTable marshal file



82
83
84
 
# File 'lib/flydata/sync_file_manager.rb', line 82

def mysql_table_marshal_dump_path
  dump_file_path + ".mysql_table"
end

#reset_table_position_files(tables) ⇒ Object

table files



148
149
150
151
152
153
 
# File 'lib/flydata/sync_file_manager.rb', line 148

def reset_table_position_files(tables)
  tables.each do |table_name|
    file = File.join(table_positions_dir_path, table_name + ".pos")
    File.open(file, "w") {|f| f.write('0') }
  end
end

#save_binlog(binlog_pos) ⇒ Object

master binlog.pos file



93
94
95
96
97
98
 
# File 'lib/flydata/sync_file_manager.rb', line 93

def save_binlog(binlog_pos)
  path = binlog_path
  File.open(path, 'w') do |f|
    f.write(binlog_content(binlog_pos))
  end
end

#save_dump_pos(status, table_name, last_pos, binlog_pos, state = nil, substate = nil) ⇒ Object 



31
32
33
34
35
 
# File 'lib/flydata/sync_file_manager.rb', line 31

def save_dump_pos(status, table_name, last_pos, binlog_pos, state = nil, substate = nil)
  File.open(dump_pos_path, 'w') do |f|
    f.write(dump_pos_content(status, table_name, last_pos, binlog_pos, state, substate))
  end
end

#save_generated_ddl(tables, contents = "1") ⇒ Object 



60
61
62
63
64
65
66
67
68
69
70
 
# File 'lib/flydata/sync_file_manager.rb', line 60

def save_generated_ddl(tables, contents = "1")
  tables = [ tables ] unless tables.kind_of?(Array)
  table_positions_dir_path = ENV['FLYDATA_TABLE_POSITIONS'] || File.join(FLYDATA_HOME, 'positions')
  #Create positions if dir does not exist
  unless File.directory?(table_positions_dir_path)
    FileUtils.mkdir_p(table_positions_dir_path)
  end
  tables.each do |tab|
    File.open(File.join(table_positions_dir_path, "#{tab}.generated_ddl"), 'w') {|f| f.write(contents) }
  end
end

#save_mysql_table_marshal_dump(mysql_table) ⇒ Object 



86
87
88
89
90
 
# File 'lib/flydata/sync_file_manager.rb', line 86

def save_mysql_table_marshal_dump(mysql_table)
  File.open(mysql_table_marshal_dump_path, 'w') do |f|
    f.write Marshal.dump(mysql_table)
  end
end

#save_record_count_stat(table, record_count) ⇒ Object 



354
355
356
357
358
 
# File 'lib/flydata/sync_file_manager.rb', line 354

def save_record_count_stat(table, record_count)
  stats = load_stats || Hash.new
  stats[table] = stats[table] ? stats[table].to_i + record_count : record_count
  save_stats(stats)
end

#save_sent_binlog(binlog_pos) ⇒ Object

sent binlog.pos file



112
113
114
115
116
 
# File 'lib/flydata/sync_file_manager.rb', line 112

def save_sent_binlog(binlog_pos)
  File.open(sent_binlog_path, 'w') do |f|
    f.write(binlog_content(binlog_pos))
  end
end

#save_ssl_ca(ssl_ca_content, path = ssl_ca_path) ⇒ Object 



141
142
143
144
145
 
# File 'lib/flydata/sync_file_manager.rb', line 141

def save_ssl_ca(ssl_ca_content, path = ssl_ca_path)
  File.open(path, 'w') do |f|
    f.write(ssl_ca_content)
  end
end

#save_sync_info(initial_sync, tables) ⇒ Object 



238
239
240
241
242
 
# File 'lib/flydata/sync_file_manager.rb', line 238

def save_sync_info(initial_sync, tables)
  File.open(sync_info_file, "w") do |f|
    f.write([initial_sync, tables.join(" ")].join("\t"))
  end
end

#save_table_binlog_pos(tables, binlog_pos, options = {}) ⇒ Object 



297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
 
# File 'lib/flydata/sync_file_manager.rb', line 297

def save_table_binlog_pos(tables, binlog_pos, options = {})
  dest_dir = case options[:destination]
             when :positions; table_positions_dir_path
             when :dump; dump_dir
             else dump_dir
             end

  tables = [ tables ] unless tables.kind_of?(Array)
  tables.each do |table_name|
    file = File.join(dest_dir, table_name + ".binlog.pos")
    File.open(file, "w") do |f|
      f.write(binlog_content(binlog_pos))
    end
  end
end

#save_table_position(table_name, seq) ⇒ Object 



221
222
223
224
225
 
# File 'lib/flydata/sync_file_manager.rb', line 221

def save_table_position(table_name, seq)
  file = File.join(table_positions_dir_path, table_name + ".pos")

  File.open(file, "w") {|f| f.write(seq)}
end

#sent_binlog_path(master_binlog_path = binlog_path) ⇒ Object 



125
126
127
128
129
130
 
# File 'lib/flydata/sync_file_manager.rb', line 125

def sent_binlog_path(master_binlog_path = binlog_path)
  unless master_binlog_path && master_binlog_path.end_with?('binlog.pos')
    raise ArgumentError.new("Invalid binlog path. binlog path needs to end with 'binlog.pos'")
  end
  "#{master_binlog_path[0..-5]}.sent.pos"
end

#ssl_ca_path(master_binlog_path = binlog_path) ⇒ Object

ssl_ca file path



133
134
135
136
137
138
139
 
# File 'lib/flydata/sync_file_manager.rb', line 133

def ssl_ca_path(master_binlog_path = binlog_path)
  unless master_binlog_path && master_binlog_path.end_with?('binlog.pos')
    raise ArgumentError.new("Invalid binlog path. binlog path needs to end with 'binlog.pos'")
  end
  # <data-entry-name>.ssl_ca.pem
  "#{master_binlog_path[0..-12]}.ssl_ca.pem"
end

#stats_path ⇒ Object 



350
351
352
 
# File 'lib/flydata/sync_file_manager.rb', line 350

def stats_path
  File.join(dump_dir, @data_entry['name']) + ".stats"
end

#sync_info_file ⇒ Object 



234
235
236
 
# File 'lib/flydata/sync_file_manager.rb', line 234

def sync_info_file
  File.join(dump_dir, "sync.info")
end

#table_binlog_pos_init_paths(*tables) ⇒ Object 



174
175
176
177
 
# File 'lib/flydata/sync_file_manager.rb', line 174

def table_binlog_pos_init_paths(*tables)
  tables.empty? ? Dir.glob(File.join(table_positions_dir_path, '*.binlog.pos.init')) :
    tables.map{|table| File.join(table_positions_dir_path, table + '.binlog.pos.init')}
end

#table_binlog_pos_paths(*tables) ⇒ Object 



169
170
171
172
 
# File 'lib/flydata/sync_file_manager.rb', line 169

def table_binlog_pos_paths(*tables)
  tables.empty? ? Dir.glob(File.join(table_positions_dir_path, '*.binlog.pos')) :
    tables.map{|table| File.join(table_positions_dir_path, table + '.binlog.pos')}
end

#table_ddl_file_paths(*tables) ⇒ Object 



164
165
166
167
 
# File 'lib/flydata/sync_file_manager.rb', line 164

def table_ddl_file_paths(*tables)
  tables.empty? ? Dir.glob(File.join(table_positions_dir_path, '*.generated_ddl')) :
    tables.map{|table| File.join(table_positions_dir_path, table + '.generated_ddl')}
end

#table_position_file_paths(*tables) ⇒ Object 



159
160
161
162
 
# File 'lib/flydata/sync_file_manager.rb', line 159

def table_position_file_paths(*tables)
  tables.empty? ? Dir.glob(File.join(table_positions_dir_path, '*.pos')) :
    tables.map{|table| File.join(table_positions_dir_path, table + '.pos')}
end

#table_positions_dir_path ⇒ Object 



155
156
157
 
# File 'lib/flydata/sync_file_manager.rb', line 155

def table_positions_dir_path
  TABLE_POSITIONS_DIR
end

#table_rev(table_name) ⇒ Object 



266
267
268
269
270
271
272
273
274
275
276
277
 
# File 'lib/flydata/sync_file_manager.rb', line 266

def table_rev(table_name)
  file = table_rev_file_path(table_name)
  return 1 unless File.exists?(file) #default revision is 1
  File.open(file, "r+") do |f|
    seq = f.read
    if seq.empty?
      return 1
    else
      return seq.to_i
    end
  end
end

#table_rev_file_path(table_name) ⇒ Object 



257
258
259
 
# File 'lib/flydata/sync_file_manager.rb', line 257

def table_rev_file_path(table_name)
  File.join(table_positions_dir_path, table_name + ".rev")
end

#table_rev_file_paths(*tables) ⇒ Object 



261
262
263
264
 
# File 'lib/flydata/sync_file_manager.rb', line 261

def table_rev_file_paths(*tables)
  tables.empty? ? Dir.glob(File.join(table_positions_dir_path, "*.rev")) :
    tables.map{|table| table_rev_file_path(table)}
end