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Batch process photos with Phatch
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MONGOWRITEBATCH(3) 1 MONGOWRITEBATCH(3) The MongoWriteBatch class INTRODUCTION
MongoWriteBatch is the base class for the MongoInsertBatch, MongoUpdateBatch and MongoDeleteBatch classes. MongoWriteBatch allows you to "batch up" multiple operations (of same type) and shipping them all to MongoDB at the same time. This can be especially useful when operating on many documents at the same time to reduce roundtrips. Prior to version 1.5.0 of the driver it was possible to use MongoCollection::batchInsert, however, as of 1.5.0 that method is now discour- aged. Note: This class is only available when talking to MongoDB 2.6.0 (and later) servers. It will throw MongoProtocolException if attempting to use it on older MongoDB servers. CLASS SYNOPSIS
MongoWriteBatch MongoWriteBatch Constants o const int$MongoWriteBatch::COMMAND_INSERT1 o const int$MongoWriteBatch::COMMAND_UPDATE2 o const int$MongoWriteBatch::COMMAND_DELETE3 Methods o protected MongoWriteBatch::__construct (MongoCollection $collection, [string $batch_type], [array $write_options]) o public bool MongoWriteBatch::add (array $item) o finalpublic array MongoWriteBatch::execute (array $write_options) MONGOWRITEBATCH TYPES
o MongoWriteBatch::COMMAND_INSERT -Create an Insert Write Batch o MongoWriteBatch::COMMAND_UPDATE -Create an Update Write Batch o MongoWriteBatch::COMMAND_DELETE -Create an Delete Write Batch DESCRIPTION
When executing a batch, by calling MongoWriteBatch::execute, MongoWriteBatch will send over maxWriteBatchSize (defaults to 1000) documents or up to maxBsonObjectSize (defaults to 16777216 bytes), whichever comes first. Note Documents will never be partially transferred. When adding documents to the batch, that overflows the limit, a new batch will be created and the document put into the new batch. ERRORS
/EXCEPTIONS oException on parameter parsing failures oException on argument validation errors (e.g. missing keys) oMongoProtocolException when talking to MongoDB server older then 2.6.0. oMongoProtocolException on socket errors. oMongoWriteConcernException when a write fails due to WriteConcerns EXAMPLES
Example #1 MongoWriteBatch example Adding documents to a Insert batch and then execute it <?php $mc = new MongoClient("localhost"); $collection = $mc->selectCollection("test", "test"); $docs = array(); $docs[] = array("my" => "demo"); $docs[] = array("is" => "working"); $docs[] = array("pretty" => "well"); $batch = new MongoInsertBatch($collection); foreach($docs as $document) { $batch->add($document); } $retval = $batch->execute(array("w" => 1)); var_dump($retval); ?> The above example will output: array(2) { ["nInserted"]=> int(3) ["ok"]=> bool(true) } PHP Documentation Group MONGOWRITEBATCH(3)
