1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
|
module Groonga
module Sharding
class LogicalEnumerator
attr_reader :target_range
attr_reader :logical_table
attr_reader :shard_key_name
def initialize(command_name, input)
@command_name = command_name
@input = input
initialize_parameters
end
def each(&block)
each_internal(:ascending, &block)
end
def reverse_each(&block)
each_internal(:descending, &block)
end
private
def each_internal(order)
context = Context.instance
each_shard_with_around(order) do |prev_shard, current_shard, next_shard|
table = current_shard.table
shard_range_data = current_shard.range_data
shard_range = nil
if shard_range_data.day.nil?
if order == :ascending
if next_shard
next_shard_range_data = next_shard.range_data
else
next_shard_range_data = nil
end
else
if prev_shard
next_shard_range_data = prev_shard.range_data
else
next_shard_range_data = nil
end
end
max_day = compute_month_shard_max_day(shard_range_data.year,
shard_range_data.month,
next_shard_range_data)
shard_range = MonthShardRange.new(shard_range_data.year,
shard_range_data.month,
max_day)
else
shard_range = DayShardRange.new(shard_range_data.year,
shard_range_data.month,
shard_range_data.day)
end
physical_shard_key_name = "#{table.name}.#{@shard_key_name}"
shard_key = context[physical_shard_key_name]
if shard_key.nil?
message =
"[#{@command_name}] shard_key doesn't exist: " +
"<#{physical_shard_key_name}>"
raise InvalidArgument, message
end
yield(table, shard_key, shard_range)
end
end
def each_shard_with_around(order)
context = Context.instance
prefix = "#{@logical_table}_"
shards = [nil]
context.database.each_table(:prefix => prefix,
:order_by => :key,
:order => order) do |table|
shard_range_raw = table.name[prefix.size..-1]
case shard_range_raw
when /\A(\d{4})(\d{2})\z/
shard_range_data = ShardRangeData.new($1.to_i, $2.to_i, nil)
when /\A(\d{4})(\d{2})(\d{2})\z/
shard_range_data = ShardRangeData.new($1.to_i, $2.to_i, $3.to_i)
else
next
end
shards << Shard.new(table, shard_range_data)
next if shards.size < 3
yield(*shards)
shards.shift
end
if shards.size == 2
yield(shards[0], shards[1], nil)
end
end
private
def initialize_parameters
@logical_table = @input[:logical_table]
if @logical_table.nil?
raise InvalidArgument, "[#{@command_name}] logical_table is missing"
end
@shard_key_name = @input[:shard_key]
if @shard_key_name.nil?
raise InvalidArgument, "[#{@command_name}] shard_key is missing"
end
@target_range = TargetRange.new(@command_name, @input)
end
def compute_month_shard_max_day(year, month, next_shard_range)
return nil if next_shard_range.nil?
return nil if month != next_shard_range.month
next_shard_range.day
end
class Shard
attr_reader :table, :range_data
def initialize(table, range_data)
@table = table
@range_data = range_data
end
end
class ShardRangeData
attr_reader :year, :month, :day
def initialize(year, month, day)
@year = year
@month = month
@day = day
end
end
class DayShardRange
attr_reader :year, :month, :day
def initialize(year, month, day)
@year = year
@month = month
@day = day
end
def least_over_time
Time.local(@year, @month, @day + 1)
end
def min_time
Time.local(@year, @month, @day)
end
def include?(time)
@year == time.year and
@month == time.month and
@day == time.day
end
end
class MonthShardRange
attr_reader :year, :month, :max_day
def initialize(year, month, max_day)
@year = year
@month = month
@max_day = max_day
end
def least_over_time
if @max_day.nil?
Time.local(@year, @month + 1, 1)
else
Time.local(@year, @month, @max_day + 1)
end
end
def min_time
Time.local(@year, @month, 1)
end
def include?(time)
return false unless @year == time.year
return false unless @month == time.month
if @max_day.nil?
true
else
time.day <= @max_day
end
end
end
class TargetRange
attr_reader :min, :min_border
attr_reader :max, :max_border
def initialize(command_name, input)
@command_name = command_name
@input = input
@min = parse_value(:min)
@min_border = parse_border(:min_border)
@max = parse_value(:max)
@max_border = parse_border(:max_border)
end
def cover_type(shard_range)
return :all if @min.nil? and @max.nil?
if @min and @max
return :none unless in_min?(shard_range)
return :none unless in_max?(shard_range)
min_partial_p = in_min_partial?(shard_range)
max_partial_p = in_max_partial?(shard_range)
if min_partial_p and max_partial_p
:partial_min_and_max
elsif min_partial_p
:partial_min
elsif max_partial_p
:partial_max
else
:all
end
elsif @min
return :none unless in_min?(shard_range)
if in_min_partial?(shard_range)
:partial_min
else
:all
end
else
return :none unless in_max?(shard_range)
if in_max_partial?(shard_range)
:partial_max
else
:all
end
end
end
private
def parse_value(name)
value = @input[name]
return nil if value.nil?
Converter.convert(value, Time)
end
def parse_border(name)
border = @input[name]
return :include if border.nil?
case border
when "include"
:include
when "exclude"
:exclude
else
message =
"[#{@command_name}] #{name} must be \"include\" or \"exclude\": " +
"<#{border}>"
raise InvalidArgument, message
end
end
def in_min?(shard_range)
@min < shard_range.least_over_time
end
def in_min_partial?(shard_range)
return false unless shard_range.include?(@min)
return true if @min_border == :exclude
not (@min.hour == 0 and
@min.min == 0 and
@min.sec == 0 and
@min.usec == 0)
end
def in_max?(shard_range)
max_base_time = shard_range.min_time
if @max_border == :include
@max >= max_base_time
else
@max > max_base_time
end
end
def in_max_partial?(shard_range)
shard_range.include?(@max)
end
end
end
end
end
|
