Batch Classes
MongoWriteBatch::add
Batch Classes
PHP Manual

# The MongoWriteBatch class

(PECL mongo >=1.5.0)

## 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 discouraged.

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 {
/* Constants */
const int COMMAND_INSERT = 1 ;
const int COMMAND_UPDATE = 2 ;
const int COMMAND_DELETE = 3 ;
/* Methods */
protected __construct ( MongoCollection `$collection` [, string `$batch_type` [, array `$write_options` ]] )
public bool add ( array `$item` )
final public array execute ( array `$write_options` )
}

## MongoWriteBatch types

`MongoWriteBatch::COMMAND_INSERT`

  Create an Insert Write Batch

`MongoWriteBatch::COMMAND_UPDATE`

  Create an Update Write Batch

`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

- Exception on parameter parsing failures
- Exception on argument validation errors (e.g. missing keys)
- MongoProtocolException when talking to MongoDB server older then 2.6.0.
- MongoProtocolException on socket errors.
- MongoWriteConcernException 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)
    }

## Table of Contents

- MongoWriteBatch::add — Adds a write operation to a batch
- MongoWriteBatch::__construct — Creates a new batch of write operations
- MongoWriteBatch::execute — Executes a batch of write operations

Batch Classes
MongoWriteBatch::add
Batch Classes
PHP Manual