Class: Flydata::FileUtil::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.



7
8
9
10
 
# File 'lib/flydata/sync_file_manager.rb', line 7

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

Instance Method Details

#backup_dir ⇒ Object 



249
250
251
 
# File 'lib/flydata/sync_file_manager.rb', line 249

def backup_dir
  BACKUP_DIR
end

#backup_dump_dir ⇒ Object 



241
242
243
244
245
246
247
 
# File 'lib/flydata/sync_file_manager.rb', line 241

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 



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

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

#close ⇒ Object 



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

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

#delete_dump_file ⇒ Object 



237
238
239
 
# File 'lib/flydata/sync_file_manager.rb', line 237

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

#delete_table_binlog_pos(table_name) ⇒ Object 



204
205
206
207
208
209
210
211
 
# File 'lib/flydata/sync_file_manager.rb', line 204

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 



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

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

#dump_pos_path ⇒ Object

dump pos file for resume



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

def dump_pos_path
  dump_file_path + ".pos"
end

#get_new_table_list(tables, file_type) ⇒ Object 



54
55
56
57
58
59
60
61
 
# File 'lib/flydata/sync_file_manager.rb', line 54

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 



167
168
169
170
171
 
# File 'lib/flydata/sync_file_manager.rb', line 167

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.



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
147
148
 
# File 'lib/flydata/sync_file_manager.rb', line 121

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
  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 



195
196
197
198
199
200
201
202
 
# File 'lib/flydata/sync_file_manager.rb', line 195

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 



222
223
224
225
226
227
228
229
230
231
232
233
234
235
 
# File 'lib/flydata/sync_file_manager.rb', line 222

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_dump_pos ⇒ Object 



32
33
34
35
36
37
38
39
40
41
 
# File 'lib/flydata/sync_file_manager.rb', line 32

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_sync_info ⇒ Object 



160
161
162
163
164
165
 
# File 'lib/flydata/sync_file_manager.rb', line 160

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

#mark_generated_tables(tables) ⇒ Object 



43
44
45
46
47
48
49
50
51
52
 
# File 'lib/flydata/sync_file_manager.rb', line 43

def mark_generated_tables(tables)
  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("1") }
  end
end

#mysql_table_marshal_dump_path ⇒ Object

MysqlTable marshal file



64
65
66
 
# File 'lib/flydata/sync_file_manager.rb', line 64

def mysql_table_marshal_dump_path
  dump_file_path + ".mysql_table"
end

#reset_table_position_files(tables) ⇒ Object 



86
87
88
89
90
91
 
# File 'lib/flydata/sync_file_manager.rb', line 86

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

binlog.pos file



75
76
77
78
79
80
 
# File 'lib/flydata/sync_file_manager.rb', line 75

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 



26
27
28
29
30
 
# File 'lib/flydata/sync_file_manager.rb', line 26

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_mysql_table_marshal_dump(mysql_table) ⇒ Object 



68
69
70
71
72
 
# File 'lib/flydata/sync_file_manager.rb', line 68

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_sync_info(initial_sync, tables) ⇒ Object 



154
155
156
157
158
 
# File 'lib/flydata/sync_file_manager.rb', line 154

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 



213
214
215
216
217
218
219
220
 
# File 'lib/flydata/sync_file_manager.rb', line 213

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

#sync_info_file ⇒ Object 



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

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

#table_binlog_pos_init_paths(*tables) ⇒ Object 



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

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 



107
108
109
110
 
# File 'lib/flydata/sync_file_manager.rb', line 107

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 



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

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 



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

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 



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

def table_positions_dir_path
  TABLE_POSITIONS_DIR
end

#table_rev(table_name) ⇒ Object 



182
183
184
185
186
187
188
189
190
191
192
193
 
# File 'lib/flydata/sync_file_manager.rb', line 182

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 



173
174
175
 
# File 'lib/flydata/sync_file_manager.rb', line 173

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

#table_rev_file_paths(*tables) ⇒ Object 



177
178
179
180
 
# File 'lib/flydata/sync_file_manager.rb', line 177

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