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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)
