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LEARN ABOUT PHP

mongowritebatch

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)

UNIX for Dummies Questions & Answers