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')

Instance Method Summary collapse

Constructor Details

#initialize(data_entry) ⇒ SyncFileManager

Returns a new instance of SyncFileManager.



9
10
11
12
 
# File 'lib/flydata/sync_file_manager.rb', line 9

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

Instance Method Details

#backup_dir ⇒ Object 



302
303
304
 
# File 'lib/flydata/sync_file_manager.rb', line 302

def backup_dir
  BACKUP_DIR
end

#backup_dump_dir ⇒ Object 



294
295
296
297
298
299
300
 
# File 'lib/flydata/sync_file_manager.rb', line 294

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 



104
105
106
 
# File 'lib/flydata/sync_file_manager.rb', line 104

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

#close ⇒ Object 



14
15
16
17
 
# File 'lib/flydata/sync_file_manager.rb', line 14

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

#delete_dump_file ⇒ Object 



290
291
292
 
# File 'lib/flydata/sync_file_manager.rb', line 290

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

#delete_table_binlog_pos(table_name) ⇒ Object 



257
258
259
260
261
262
263
264
 
# File 'lib/flydata/sync_file_manager.rb', line 257

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 



19
20
21
 
# File 'lib/flydata/sync_file_manager.rb', line 19

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

#dump_pos_path ⇒ Object

dump pos file for resume



24
25
26
 
# File 'lib/flydata/sync_file_manager.rb', line 24

def dump_pos_path
  dump_file_path + ".pos"
end

#get_new_table_list(tables, file_type) ⇒ Object 



69
70
71
72
73
74
75
76
 
# File 'lib/flydata/sync_file_manager.rb', line 69

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 



220
221
222
223
224
 
# File 'lib/flydata/sync_file_manager.rb', line 220

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

#increment_and_save_table_position(table_name) ⇒ 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.



173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
 
# File 'lib/flydata/sync_file_manager.rb', line 173

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] ||= File.open(file, "r+")
  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
  seq = seq.to_i + 1
  seq = FlydataCore::QueryJob::SYNC_FIRST_SEQ if seq == 1
  begin
    yield(seq)
  ensure
    # when an error happened in yield, the sequence number should remain
    # as is.  For the next call to read the value correctly, the position
    # must be rewound.
    f.rewind
  end
  f.truncate(0)
  f.write(seq)
  f.flush
  f.rewind
end

#increment_table_rev(table_name, base_rev) ⇒ Object 



248
249
250
251
252
253
254
255
 
# File 'lib/flydata/sync_file_manager.rb', line 248

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 



275
276
277
278
279
280
281
282
283
284
285
286
287
288
 
# File 'lib/flydata/sync_file_manager.rb', line 275

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 



97
98
99
100
101
102
 
# File 'lib/flydata/sync_file_manager.rb', line 97

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 



34
35
36
37
38
39
40
41
42
43
 
# File 'lib/flydata/sync_file_manager.rb', line 34

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 



45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/flydata/sync_file_manager.rb', line 45

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_stats ⇒ Object 



316
317
318
319
 
# File 'lib/flydata/sync_file_manager.rb', line 316

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

#load_sync_info ⇒ Object 



213
214
215
216
217
218
 
# File 'lib/flydata/sync_file_manager.rb', line 213

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



79
80
81
 
# File 'lib/flydata/sync_file_manager.rb', line 79

def mysql_table_marshal_dump_path
  dump_file_path + ".mysql_table"
end

#reset_table_position_files(tables) ⇒ Object

table files



138
139
140
141
142
143
 
# File 'lib/flydata/sync_file_manager.rb', line 138

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



90
91
92
93
94
95
 
# File 'lib/flydata/sync_file_manager.rb', line 90

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 



28
29
30
31
32
 
# File 'lib/flydata/sync_file_manager.rb', line 28

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 



57
58
59
60
61
62
63
64
65
66
67
 
# File 'lib/flydata/sync_file_manager.rb', line 57

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 



83
84
85
86
87
 
# File 'lib/flydata/sync_file_manager.rb', line 83

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 



310
311
312
313
314
 
# File 'lib/flydata/sync_file_manager.rb', line 310

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



109
110
111
112
113
 
# File 'lib/flydata/sync_file_manager.rb', line 109

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 



131
132
133
134
135
 
# File 'lib/flydata/sync_file_manager.rb', line 131

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 



207
208
209
210
211
 
# File 'lib/flydata/sync_file_manager.rb', line 207

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) ⇒ Object 



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

def save_table_binlog_pos(tables, binlog_pos)
  tables.each do |table_name|
    file = File.join(dump_dir, table_name + ".binlog.pos")
    File.open(file, "w") do |f|
      f.write(binlog_content(binlog_pos))
    end
  end
end

#sent_binlog_path(master_binlog_path = binlog_path) ⇒ Object 



115
116
117
118
119
120
 
# File 'lib/flydata/sync_file_manager.rb', line 115

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



123
124
125
126
127
128
129
 
# File 'lib/flydata/sync_file_manager.rb', line 123

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 



306
307
308
 
# File 'lib/flydata/sync_file_manager.rb', line 306

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

#sync_info_file ⇒ Object 



203
204
205
 
# File 'lib/flydata/sync_file_manager.rb', line 203

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

#table_binlog_pos_init_paths(*tables) ⇒ Object 



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

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 



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

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 



154
155
156
157
 
# File 'lib/flydata/sync_file_manager.rb', line 154

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 



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

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 



145
146
147
 
# File 'lib/flydata/sync_file_manager.rb', line 145

def table_positions_dir_path
  TABLE_POSITIONS_DIR
end

#table_rev(table_name) ⇒ Object 



235
236
237
238
239
240
241
242
243
244
245
246
 
# File 'lib/flydata/sync_file_manager.rb', line 235

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 



226
227
228
 
# File 'lib/flydata/sync_file_manager.rb', line 226

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

#table_rev_file_paths(*tables) ⇒ Object 



230
231
232
233
 
# File 'lib/flydata/sync_file_manager.rb', line 230

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