DOCSP-43912: Improve change stream code examples #264
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| <?php | ||
| require 'vendor/autoload.php'; | ||
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| // start-to-json | ||
| function toJSON(object $document): string | ||
| { | ||
| return MongoDB\BSON\Document::fromPHP($document)->toRelaxedExtendedJSON(); | ||
| } | ||
| // end-to-json | ||
|
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| $uri = getenv('MONGODB_URI') ?: throw new RuntimeException('Set the MONGODB_URI variable to your Atlas URI that connects to the sample dataset'); | ||
| $client = new MongoDB\Client($uri); | ||
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| // start-db-coll | ||
| $collection = $client->sample_restaurants->restaurants; | ||
| // end-db-coll | ||
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| // Passes an options argument to watch() to include the post-image of updated documents | ||
| // start-change-stream-post-image | ||
| $options = ['fullDocument' => MongoDB\Operation\Watch::FULL_DOCUMENT_UPDATE_LOOKUP]; | ||
| $changeStream = $collection->watch([], $options); | ||
| $changeStream->rewind(); | ||
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| do { | ||
| $changeStream->next(); | ||
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| if ($changeStream->valid()) { | ||
| $event = $changeStream->current(); | ||
| echo toJSON($event), PHP_EOL; | ||
| } | ||
| } while (! $changeStream->valid() || $changeStream->current()['operationType'] !== 'invalidate'); | ||
| // end-change-stream-post-image | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| <?php | ||
| require 'vendor/autoload.php'; | ||
|
|
||
| // start-to-json | ||
| function toJSON(object $document): string | ||
| { | ||
| return MongoDB\BSON\Document::fromPHP($document)->toRelaxedExtendedJSON(); | ||
| } | ||
| // end-to-json | ||
|
|
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| $uri = getenv('MONGODB_URI') ?: throw new RuntimeException('Set the MONGODB_URI variable to your Atlas URI that connects to the sample dataset'); | ||
| $client = new MongoDB\Client($uri); | ||
|
|
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| // start-db-coll | ||
| $collection = $client->sample_restaurants->restaurants; | ||
| // end-db-coll | ||
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| // Updates a document that has a "name" value of "Blarney Castle" | ||
| // start-update-for-change-stream | ||
| $result = $collection->updateOne( | ||
| ['name' => 'Blarney Castle'], | ||
| ['$set' => ['cuisine' => 'Irish']] | ||
| ); | ||
| // end-update-for-change-stream | ||
|
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| // Passes a pipeline argument to watch() to monitor only update operations | ||
| // start-change-stream-pipeline | ||
| $pipeline = [['$match' => ['operationType' => 'update']]]; | ||
| $changeStream = $collection->watch($pipeline); | ||
| $changeStream->rewind(); | ||
|
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||
| do { | ||
| $changeStream->next(); | ||
|
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||
| if ($changeStream->valid()) { | ||
| $event = $changeStream->current(); | ||
| echo toJSON($event), PHP_EOL; | ||
| } | ||
| } while (! $changeStream->valid() || $changeStream->current()['operationType'] !== 'invalidate'); | ||
| // end-change-stream-pipeline |
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| Original file line number | Diff line number | Diff line change | ||||||
|---|---|---|---|---|---|---|---|---|
| @@ -0,0 +1,39 @@ | ||||||||
| <?php | ||||||||
| require 'vendor/autoload.php'; | ||||||||
|
|
||||||||
| // start-to-json | ||||||||
| function toJSON(object $document): string | ||||||||
| { | ||||||||
| return MongoDB\BSON\Document::fromPHP($document)->toRelaxedExtendedJSON(); | ||||||||
| } | ||||||||
| // end-to-json | ||||||||
|
|
||||||||
| $uri = getenv('MONGODB_URI') ?: throw new RuntimeException('Set the MONGODB_URI variable to your Atlas URI that connects to the sample dataset'); | ||||||||
| $client = new MongoDB\Client($uri); | ||||||||
|
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| // start-db-coll | ||||||||
| $collection = $client->sample_restaurants->restaurants; | ||||||||
| // end-db-coll | ||||||||
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| // Monitors and prints changes to the "restaurants" collection | ||||||||
| // start-open-change-stream | ||||||||
| $changeStream = $collection->watch(); | ||||||||
| $changeStream->rewind(); | ||||||||
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| do { | ||||||||
| $changeStream->next(); | ||||||||
|
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||||||||
| if ($changeStream->valid()) { | ||||||||
| $event = $changeStream->current(); | ||||||||
| echo toJSON($event), PHP_EOL; | ||||||||
| } | ||||||||
| } while (! $changeStream->valid() || $changeStream->current()['operationType'] !== 'invalidate'); | ||||||||
| // end-open-change-stream | ||||||||
|
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||||||||
| // Updates a document that has a "name" value of "Blarney Castle" | ||||||||
| // start-update-for-change-stream | ||||||||
| $result = $collection->updateOne( | ||||||||
| ['name' => 'Blarney Castle'], | ||||||||
| ['$set' => ['cuisine' => 'Irish']] | ||||||||
| ); | ||||||||
| // end-update-for-change-stream | ||||||||
|
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On reflection, this notation is much more complex than the previous example.
In my original comment the idea was rather to use
while(true)like this: