|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* Defines the TraderInteractive\Mongo\Queue class. |
|
4
|
|
|
*/ |
|
5
|
|
|
|
|
6
|
|
|
namespace TraderInteractive\Mongo; |
|
7
|
|
|
|
|
8
|
|
|
use ArrayObject; |
|
9
|
|
|
use MongoDB\BSON\ObjectID; |
|
10
|
|
|
use MongoDB\BSON\UTCDateTime; |
|
11
|
|
|
use MongoDB\Operation\FindOneAndUpdate; |
|
12
|
|
|
|
|
13
|
|
|
/** |
|
14
|
|
|
* Abstraction of mongo db collection as priority queue. |
|
15
|
|
|
* |
|
16
|
|
|
* Tied priorities are ordered by time. So you may use a single priority for normal queuing (default args exist for |
|
17
|
|
|
* this purpose). Using a random priority achieves random get() |
|
18
|
|
|
*/ |
|
19
|
|
|
abstract class AbstractQueue |
|
20
|
|
|
{ |
|
21
|
|
|
/** |
|
22
|
|
|
* Maximum millisecond value to use for UTCDateTime creation. |
|
23
|
|
|
* |
|
24
|
|
|
* @var integer |
|
25
|
|
|
*/ |
|
26
|
|
|
const MONGO_INT32_MAX = PHP_INT_MAX; |
|
27
|
|
|
|
|
28
|
|
|
/** |
|
29
|
|
|
* mongo collection to use for queue. |
|
30
|
|
|
* |
|
31
|
|
|
* @var \MongoDB\Collection |
|
32
|
|
|
*/ |
|
33
|
|
|
protected $collection; |
|
34
|
|
|
|
|
35
|
|
|
/** |
|
36
|
|
|
* @var array |
|
37
|
|
|
*/ |
|
38
|
|
|
const FIND_ONE_AND_UPDATE_OPTIONS = [ |
|
39
|
|
|
'sort' => ['priority' => 1, 'created' => 1], |
|
40
|
|
|
'typeMap' => ['root' => 'array', 'document' => 'array', 'array' => 'array'], |
|
41
|
|
|
'returnDocument' => FindOneAndUpdate::RETURN_DOCUMENT_AFTER, |
|
42
|
|
|
]; |
|
43
|
|
|
|
|
44
|
|
|
/** |
|
45
|
|
|
* @var integer |
|
46
|
|
|
*/ |
|
47
|
|
|
const DEFAULT_MAX_NUMBER_OF_MESSAGES = 1; |
|
48
|
|
|
|
|
49
|
|
|
/** |
|
50
|
|
|
* @var integer |
|
51
|
|
|
*/ |
|
52
|
|
|
const DEFAULT_RUNNING_RESET_DURATION = 600000; |
|
53
|
|
|
|
|
54
|
|
|
/** |
|
55
|
|
|
* @var integer |
|
56
|
|
|
*/ |
|
57
|
|
|
const DEFAULT_WAIT_DURATION_IN_MILLISECONDS = 3000; |
|
58
|
|
|
|
|
59
|
|
|
/** |
|
60
|
|
|
* @var integer |
|
61
|
|
|
*/ |
|
62
|
|
|
const DEFAULT_POLL_DURATION_IN_MILLISECONDS = 200; |
|
63
|
|
|
|
|
64
|
|
|
/** |
|
65
|
|
|
* @var array |
|
66
|
|
|
*/ |
|
67
|
|
|
const DEFAULT_GET_OPTIONS = [ |
|
68
|
|
|
'maxNumberOfMessages' => self::DEFAULT_MAX_NUMBER_OF_MESSAGES, |
|
69
|
|
|
'runningResetDuration' => self::DEFAULT_RUNNING_RESET_DURATION, |
|
70
|
|
|
'waitDurationInMillis' => self::DEFAULT_WAIT_DURATION_IN_MILLISECONDS, |
|
71
|
|
|
'pollDurationInMillis' => self::DEFAULT_POLL_DURATION_IN_MILLISECONDS, |
|
72
|
|
|
]; |
|
73
|
|
|
|
|
74
|
|
|
/** |
|
75
|
|
|
* Ensure an index for the get() method. |
|
76
|
|
|
* |
|
77
|
|
|
* @param array $beforeSort Fields in get() call to index before the sort field in same format |
|
78
|
|
|
* as \MongoDB\Collection::ensureIndex() |
|
79
|
|
|
* @param array $afterSort Fields in get() call to index after the sort field in same format as |
|
80
|
|
|
* \MongoDB\Collection::ensureIndex() |
|
81
|
|
|
* |
|
82
|
|
|
* @return void |
|
83
|
|
|
* |
|
84
|
|
|
* @throws \InvalidArgumentException value of $beforeSort or $afterSort is not 1 or -1 for ascending and descending |
|
85
|
|
|
* @throws \InvalidArgumentException key in $beforeSort or $afterSort was not a string |
|
86
|
|
|
*/ |
|
87
|
|
|
final public function ensureGetIndex(array $beforeSort = [], array $afterSort = []) |
|
88
|
|
|
{ |
|
89
|
|
|
//using general rule: equality, sort, range or more equality tests in that order for index |
|
90
|
|
|
$completeFields = ['earliestGet' => 1]; |
|
91
|
|
|
|
|
92
|
|
|
$this->verifySort($beforeSort, 'beforeSort', $completeFields); |
|
93
|
|
|
|
|
94
|
|
|
$completeFields['priority'] = 1; |
|
95
|
|
|
$completeFields['created'] = 1; |
|
96
|
|
|
|
|
97
|
|
|
$this->verifySort($afterSort, 'afterSort', $completeFields); |
|
98
|
|
|
|
|
99
|
|
|
//for the main query in get() |
|
100
|
|
|
$this->ensureIndex($completeFields); |
|
101
|
|
|
} |
|
102
|
|
|
|
|
103
|
|
|
/** |
|
104
|
|
|
* Ensure an index for the count() method. |
|
105
|
|
|
* Is a no-op if the generated index is a prefix of an existing one. If you have a similar ensureGetIndex call, |
|
106
|
|
|
* call it first. |
|
107
|
|
|
* |
|
108
|
|
|
* @param array $fields fields in count() call to index in same format as \MongoDB\Collection::createIndex() |
|
109
|
|
|
* @param bool $includeRunning whether to include the running field in the index |
|
110
|
|
|
* |
|
111
|
|
|
* @return void |
|
112
|
|
|
* |
|
113
|
|
|
* @throws \InvalidArgumentException key in $fields was not a string |
|
114
|
|
|
* @throws \InvalidArgumentException value of $fields is not 1 or -1 for ascending and descending |
|
115
|
|
|
*/ |
|
116
|
|
|
final public function ensureCountIndex(array $fields, bool $includeRunning) |
|
117
|
|
|
{ |
|
118
|
|
|
$completeFields = []; |
|
119
|
|
|
|
|
120
|
|
|
if ($includeRunning) { |
|
121
|
|
|
$completeFields['earliestGet'] = 1; |
|
122
|
|
|
} |
|
123
|
|
|
|
|
124
|
|
|
$this->verifySort($fields, 'fields', $completeFields); |
|
125
|
|
|
|
|
126
|
|
|
$this->ensureIndex($completeFields); |
|
127
|
|
|
} |
|
128
|
|
|
|
|
129
|
|
|
/** |
|
130
|
|
|
* Get a non running message from the queue. |
|
131
|
|
|
* |
|
132
|
|
|
* @param array $query in same format as \MongoDB\Collection::find() where top level fields do not contain |
|
133
|
|
|
* operators. Lower level fields can however. eg: valid {a: {$gt: 1}, "b.c": 3}, |
|
134
|
|
|
* invalid {$and: [{...}, {...}]} |
|
135
|
|
|
* @param array $options Associative array of get options. |
|
136
|
|
|
* runningResetDuration => integer |
|
137
|
|
|
* The duration (in miiliseconds) that the received messages are hidden from |
|
138
|
|
|
* subsequent retrieve requests after being retrieved by a get() request. |
|
139
|
|
|
* waitDurationInMillis => integer |
|
140
|
|
|
* The duration (in milliseconds) for which the call will wait for a message to |
|
141
|
|
|
* arrive in the queue before returning. If a message is available, the call will |
|
142
|
|
|
* return sooner than WaitTimeSeconds. |
|
143
|
|
|
* pollDurationInMillis => integer |
|
144
|
|
|
* The millisecond duration to wait between polls. |
|
145
|
|
|
* maxNumberOfMessages => integer |
|
146
|
|
|
* The maximum number of messages to return with get(). All of the messages are not |
|
147
|
|
|
* necessarily returned. |
|
148
|
|
|
* |
|
149
|
|
|
* @return array Array of messages. |
|
150
|
|
|
* |
|
151
|
|
|
* @throws \InvalidArgumentException key in $query was not a string |
|
152
|
|
|
*/ |
|
153
|
|
|
final public function get(array $query, array $options = []) : array |
|
154
|
|
|
{ |
|
155
|
|
|
$completeQuery = $this->buildPayloadQuery( |
|
156
|
|
|
['earliestGet' => ['$lte' => new UTCDateTime((int)(microtime(true) * 1000))]], |
|
157
|
|
|
$query |
|
158
|
|
|
); |
|
159
|
|
|
|
|
160
|
|
|
$options += static::DEFAULT_GET_OPTIONS; |
|
161
|
|
|
$update = ['$set' => ['earliestGet' => $this->calculateEarliestGet($options['runningResetDuration'])]]; |
|
162
|
|
|
$end = $this->calculateEndTime($options['waitDurationInMillis']); |
|
163
|
|
|
$sleepTime = $this->calculateSleepTime($options['pollDurationInMillis']); |
|
164
|
|
|
$messages = new ArrayObject(); |
|
165
|
|
|
while (count($messages) < $options['maxNumberOfMessages']) { |
|
166
|
|
|
if ($this->tryFindOneAndUpdate($completeQuery, $update, $messages)) { |
|
167
|
|
|
continue; |
|
168
|
|
|
} |
|
169
|
|
|
|
|
170
|
|
|
if (microtime(true) < $end) { |
|
171
|
|
|
usleep($sleepTime); |
|
172
|
|
|
} |
|
173
|
|
|
|
|
174
|
|
|
break; |
|
175
|
|
|
} |
|
176
|
|
|
|
|
177
|
|
|
return $messages->getArrayCopy(); |
|
178
|
|
|
} |
|
179
|
|
|
|
|
180
|
|
|
/** |
|
181
|
|
|
* Count queue messages. |
|
182
|
|
|
* |
|
183
|
|
|
* @param array $query in same format as \MongoDB\Collection::find() where top level fields do not contain |
|
184
|
|
|
* operators. Lower level fields can however. eg: valid {a: {$gt: 1}, "b.c": 3}, |
|
185
|
|
|
* invalid {$and: [{...}, {...}]} |
|
186
|
|
|
* @param bool|null $running query a running message or not or all |
|
187
|
|
|
* |
|
188
|
|
|
* @return int the count |
|
189
|
|
|
* |
|
190
|
|
|
* @throws \InvalidArgumentException key in $query was not a string |
|
191
|
|
|
*/ |
|
192
|
|
|
final public function count(array $query, bool $running = null) : int |
|
193
|
|
|
{ |
|
194
|
|
|
$totalQuery = []; |
|
195
|
|
|
|
|
196
|
|
|
if ($running === true || $running === false) { |
|
197
|
|
|
$key = $running ? '$gt' : '$lte'; |
|
198
|
|
|
$totalQuery['earliestGet'] = [$key => new UTCDateTime((int)(microtime(true) * 1000))]; |
|
199
|
|
|
} |
|
200
|
|
|
|
|
201
|
|
|
return $this->collection->countDocuments($this->buildPayloadQuery($totalQuery, $query)); |
|
202
|
|
|
} |
|
203
|
|
|
|
|
204
|
|
|
/** |
|
205
|
|
|
* Acknowledge a message was processed and remove from queue. |
|
206
|
|
|
* |
|
207
|
|
|
* @param Message $message message received from get() |
|
208
|
|
|
* |
|
209
|
|
|
* @return void |
|
210
|
|
|
*/ |
|
211
|
|
|
final public function ack(Message $message) |
|
212
|
|
|
{ |
|
213
|
|
|
$this->collection->deleteOne(['_id' => $message->getId()]); |
|
214
|
|
|
} |
|
215
|
|
|
|
|
216
|
|
|
/** |
|
217
|
|
|
* Atomically acknowledge and send a message to the queue. |
|
218
|
|
|
* |
|
219
|
|
|
* @param Message $message message received from get(). |
|
220
|
|
|
* |
|
221
|
|
|
* @return void |
|
222
|
|
|
*/ |
|
223
|
|
|
final public function requeue(Message $message) |
|
224
|
|
|
{ |
|
225
|
|
|
$set = [ |
|
226
|
|
|
'payload' => $message->getPayload(), |
|
227
|
|
|
'earliestGet' => $message->getEarliestGet(), |
|
228
|
|
|
'priority' => $message->getPriority(), |
|
229
|
|
|
'machineName' => gethostname(), |
|
230
|
|
|
'created' => new UTCDateTime(), |
|
231
|
|
|
]; |
|
232
|
|
|
|
|
233
|
|
|
$this->collection->updateOne(['_id' => $message->getId()], ['$set' => $set], ['upsert' => true]); |
|
234
|
|
|
} |
|
235
|
|
|
|
|
236
|
|
|
/** |
|
237
|
|
|
* Send a message to the queue. |
|
238
|
|
|
* |
|
239
|
|
|
* @param Message $message The message to send. |
|
240
|
|
|
* |
|
241
|
|
|
* @return void |
|
242
|
|
|
*/ |
|
243
|
|
|
final public function send(Message $message) |
|
244
|
|
|
{ |
|
245
|
|
|
$document = [ |
|
246
|
|
|
'_id' => $message->getId(), |
|
247
|
|
|
'payload' => $message->getPayload(), |
|
248
|
|
|
'earliestGet' => $message->getEarliestGet(), |
|
249
|
|
|
'priority' => $message->getPriority(), |
|
250
|
|
|
'machineName' => gethostname(), |
|
251
|
|
|
'created' => new UTCDateTime(), |
|
252
|
|
|
]; |
|
253
|
|
|
|
|
254
|
|
|
$this->collection->insertOne($document); |
|
255
|
|
|
} |
|
256
|
|
|
|
|
257
|
|
|
/** |
|
258
|
|
|
* Ensure index of correct specification and a unique name whether the specification or name already exist or not. |
|
259
|
|
|
* Will not create index if $index is a prefix of an existing index |
|
260
|
|
|
* |
|
261
|
|
|
* @param array $index index to create in same format as \MongoDB\Collection::createIndex() |
|
262
|
|
|
* |
|
263
|
|
|
* @return void |
|
264
|
|
|
* |
|
265
|
|
|
* @throws \Exception couldnt create index after 5 attempts |
|
266
|
|
|
*/ |
|
267
|
|
|
private function ensureIndex(array $index) |
|
268
|
|
|
{ |
|
269
|
|
|
if ($this->isIndexIncludedInExistingIndex($index)) { |
|
270
|
|
|
return; |
|
271
|
|
|
} |
|
272
|
|
|
|
|
273
|
|
|
for ($i = 0; $i < 5; ++$i) { |
|
274
|
|
|
if ($this->tryCreateIndex($index)) { |
|
275
|
|
|
return; |
|
276
|
|
|
} |
|
277
|
|
|
} |
|
278
|
|
|
|
|
279
|
|
|
throw new \Exception('couldnt create index after 5 attempts'); |
|
280
|
|
|
//@codeCoverageIgnoreEnd |
|
281
|
|
|
} |
|
282
|
|
|
|
|
283
|
|
|
private function buildPayloadQuery(array $initialQuery, array $payloadQuery) |
|
284
|
|
|
{ |
|
285
|
|
|
foreach ($payloadQuery as $key => $value) { |
|
286
|
|
|
if (!is_string($key)) { |
|
287
|
|
|
throw new \InvalidArgumentException('key in $query was not a string'); |
|
288
|
|
|
} |
|
289
|
|
|
|
|
290
|
|
|
$initialQuery["payload.{$key}"] = $value; |
|
291
|
|
|
} |
|
292
|
|
|
|
|
293
|
|
|
return $initialQuery; |
|
294
|
|
|
} |
|
295
|
|
|
|
|
296
|
|
|
private function calculateSleepTime(int $pollDurationInMillis) : int |
|
297
|
|
|
{ |
|
298
|
|
|
$pollDurationInMillis = max($pollDurationInMillis, 0); |
|
299
|
|
|
$sleepTime = $pollDurationInMillis * 1000; |
|
300
|
|
|
//ints overflow to floats and already checked $pollDurationInMillis was positive |
|
301
|
|
|
return is_int($sleepTime) ? $sleepTime : PHP_INT_MAX; |
|
|
|
|
|
|
302
|
|
|
} |
|
303
|
|
|
|
|
304
|
|
|
private function calculateEarliestGet(int $runningResetDuration) : UTCDateTime |
|
305
|
|
|
{ |
|
306
|
|
|
$resetTimestamp = time() + $runningResetDuration; |
|
307
|
|
|
//ints overflow to floats, max at PHP_INT_MAX |
|
308
|
|
|
return new UTCDateTime(min(max(0, $resetTimestamp * 1000), static::MONGO_INT32_MAX)); |
|
309
|
|
|
} |
|
310
|
|
|
|
|
311
|
|
|
private function tryFindOneAndUpdate(array $query, array $update, ArrayObject $messages) : bool |
|
312
|
|
|
{ |
|
313
|
|
|
$document = $this->collection->findOneAndUpdate($query, $update, static::FIND_ONE_AND_UPDATE_OPTIONS); |
|
314
|
|
|
if ($document === null) { |
|
315
|
|
|
return false; |
|
316
|
|
|
} |
|
317
|
|
|
|
|
318
|
|
|
$messages[] = new Message( |
|
319
|
|
|
$document['_id'], |
|
320
|
|
|
$document['payload'], |
|
321
|
|
|
$document['earliestGet'], |
|
322
|
|
|
$document['priority'] |
|
323
|
|
|
); |
|
324
|
|
|
|
|
325
|
|
|
return true; |
|
326
|
|
|
} |
|
327
|
|
|
|
|
328
|
|
|
private function isIndexIncludedInExistingIndex(array $index) : bool |
|
329
|
|
|
{ |
|
330
|
|
|
//if $index is a prefix of any existing index we are good |
|
331
|
|
|
foreach ($this->collection->listIndexes() as $existingIndex) { |
|
332
|
|
|
$slice = array_slice($existingIndex['key'], 0, count($index), true); |
|
333
|
|
|
if ($slice === $index) { |
|
334
|
|
|
return true; |
|
335
|
|
|
} |
|
336
|
|
|
} |
|
337
|
|
|
|
|
338
|
|
|
return false; |
|
339
|
|
|
} |
|
340
|
|
|
|
|
341
|
|
|
private function tryCreateIndex(array $index) : bool |
|
342
|
|
|
{ |
|
343
|
|
|
for ($name = uniqid(); strlen($name) > 0; $name = substr($name, 0, -1)) { |
|
344
|
|
|
if ($this->tryCreateNamedIndex($index, $name)) { |
|
345
|
|
|
return true; |
|
346
|
|
|
} |
|
347
|
|
|
} |
|
348
|
|
|
|
|
349
|
|
|
return false; |
|
350
|
|
|
} |
|
351
|
|
|
|
|
352
|
|
|
private function tryCreateNamedIndex(array $index, string $name) : bool |
|
353
|
|
|
{ |
|
354
|
|
|
//creating an index with same name and different spec does nothing. |
|
355
|
|
|
//creating an index with same spec and different name does nothing. |
|
356
|
|
|
//so we use any generated name, and then find the right spec after we have called, |
|
357
|
|
|
//and just go with that name. |
|
358
|
|
|
try { |
|
359
|
|
|
$this->collection->createIndex($index, ['name' => $name, 'background' => true]); |
|
360
|
|
|
} catch (\MongoDB\Exception\Exception $e) { |
|
361
|
|
|
//this happens when the name was too long, let continue |
|
362
|
|
|
} |
|
363
|
|
|
|
|
364
|
|
|
return $this->indexExists($index); |
|
365
|
|
|
} |
|
366
|
|
|
|
|
367
|
|
|
private function indexExists(array $index) : bool |
|
368
|
|
|
{ |
|
369
|
|
|
foreach ($this->collection->listIndexes() as $existingIndex) { |
|
370
|
|
|
if ($existingIndex['key'] === $index) { |
|
371
|
|
|
return true; |
|
372
|
|
|
} |
|
373
|
|
|
} |
|
374
|
|
|
|
|
375
|
|
|
return false; |
|
376
|
|
|
} |
|
377
|
|
|
|
|
378
|
|
|
/** |
|
379
|
|
|
* Helper method to validate keys and values for the given sort array |
|
380
|
|
|
* |
|
381
|
|
|
* @param array $sort The proposed sort for a mongo index. |
|
382
|
|
|
* @param string $label The name of the variable given to the public ensureXIndex method. |
|
383
|
|
|
* @param array &$completedFields The final index array with payload. prefix added to fields. |
|
384
|
|
|
* |
|
385
|
|
|
* @return void |
|
386
|
|
|
*/ |
|
387
|
|
|
private function verifySort(array $sort, string $label, array &$completeFields) |
|
388
|
|
|
{ |
|
389
|
|
|
foreach ($sort as $key => $value) { |
|
390
|
|
|
$this->throwIfTrue(!is_string($key), "key in \${$label} was not a string"); |
|
391
|
|
|
$this->throwIfTrue( |
|
392
|
|
|
$value !== 1 && $value !== -1, |
|
393
|
|
|
"value of \${$label} is not 1 or -1 for ascending and descending" |
|
394
|
|
|
); |
|
395
|
|
|
|
|
396
|
|
|
$completeFields["payload.{$key}"] = $value; |
|
397
|
|
|
} |
|
398
|
|
|
} |
|
399
|
|
|
|
|
400
|
|
|
private function throwIfTrue( |
|
401
|
|
|
bool $condition, |
|
402
|
|
|
string $message, |
|
403
|
|
|
string $exceptionClass = '\\InvalidArgumentException' |
|
404
|
|
|
) { |
|
405
|
|
|
if ($condition === true) { |
|
406
|
|
|
$reflectionClass = new \ReflectionClass($exceptionClass); |
|
407
|
|
|
throw $reflectionClass->newInstanceArgs([$message]); |
|
408
|
|
|
} |
|
409
|
|
|
} |
|
410
|
|
|
|
|
411
|
|
|
private function calculateEndTime(int $waitDurationInMillis) : float |
|
412
|
|
|
{ |
|
413
|
|
|
return microtime(true) + ($waitDurationInMillis / 1000.0); |
|
414
|
|
|
} |
|
415
|
|
|
} |
|
416
|
|
|
|