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https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@322123 c90b9560-bf6c-de11-be94-00142212c4b1
223 lines
7.3 KiB
XML
223 lines
7.3 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<phpdoc:classref xml:id="class.mongodb" xmlns:phpdoc="http://php.net/ns/phpdoc" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
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<title>The MongoDB class</title>
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<titleabbrev>MongoDB</titleabbrev>
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<partintro>
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<!-- {{{ Mongodb intro -->
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<section xml:id="mongodb.intro">
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&reftitle.intro;
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<para>
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Instances of this class are used to interact with a database. To get a
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database:
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<programlisting role="php">
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<![CDATA[
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<?php
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$m = new Mongo(); // connect
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$db = $m->selectDB("example");
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?>
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]]>
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</programlisting>
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Database names can use almost any character in the ASCII range. However,
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they cannot contain " ", "." or be the empty string.
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The name "system" is also reserved.
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</para>
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<para>
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A few unusual, but valid, database names: "null", "[x,y]", "3", "\"", "/".
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</para>
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<para>
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Unlike collection names, database names may contain "$".
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</para>
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</section>
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<!-- }}} -->
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<section xml:id="mongodb.synopsis">
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&reftitle.classsynopsis;
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<!-- {{{ Synopsis -->
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<classsynopsis>
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<ooclass><classname>MongoDB</classname></ooclass>
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<!-- {{{ Class synopsis -->
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<classsynopsisinfo>
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<ooclass>
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<classname>MongoDB</classname>
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</ooclass>
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</classsynopsisinfo>
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<!-- }}} -->
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<classsynopsisinfo role="comment">&Constants;</classsynopsisinfo>
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<fieldsynopsis>
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<modifier>const</modifier>
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<type>int</type>
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<varname linkend="mongodb.constants.profilingoff">MongoDB::PROFILING_OFF</varname>
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<initializer>0</initializer>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>const</modifier>
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<type>int</type>
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<varname linkend="mongodb.constants.profilingslow">MongoDB::PROFILING_SLOW</varname>
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<initializer>1</initializer>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>const</modifier>
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<type>int</type>
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<varname linkend="mongodb.constants.profilingon">MongoDB::PROFILING_ON</varname>
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<initializer>2</initializer>
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</fieldsynopsis>
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<classsynopsisinfo role="comment">Fields</classsynopsisinfo>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>integer</type>
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<varname linkend="mongodb.props.w">w</varname>
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<initializer>1</initializer>
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</fieldsynopsis>
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<fieldsynopsis>
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<modifier>public</modifier>
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<type>integer</type>
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<varname linkend="mongodb.props.wtimeout">wtimeout</varname>
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<initializer>10000</initializer>
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</fieldsynopsis>
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<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.mongodb')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[1])" />
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</classsynopsis>
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<!-- }}} -->
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</section>
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<section>
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&reftitle.constants;
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<section xml:id="mongodb.constants.types">
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<title>MongoDB Log Levels</title>
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<variablelist>
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<varlistentry xml:id="mongodb.constants.profilingoff">
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<term><constant>MongoDB::PROFILING_OFF</constant></term>
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<term><constant>0</constant></term>
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<listitem>
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<simpara>
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Profiling is off.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="mongodb.constants.profilingslow">
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<term><constant>MongoDB::PROFILING_SLOW</constant></term>
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<term><constant>1</constant></term>
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<listitem>
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<simpara>
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Profiling is on for slow operations (>100 ms).
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="mongodb.constants.profilingon">
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<term><constant>MongoDB::PROFILING_ON</constant></term>
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<term><constant>2</constant></term>
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<listitem>
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<simpara>
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Profiling is on for all operations.
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</simpara>
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</listitem>
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</varlistentry>
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</variablelist>
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</section>
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</section>
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<section>
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<title>Fields</title>
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<variablelist>
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<varlistentry xml:id="mongodb.props.w">
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<term><varname>w</varname></term>
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<term>1</term>
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<listitem>
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<para>
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The number of servers to replicate a change to before returning success.
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Inherited by instances of <classname>MongoCollection</classname> derived
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from this. <literal>w</literal> functionality is only available in
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version 1.5.1+ of the MongoDB server and 1.0.8+ of the driver.
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</para>
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<para>
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<literal>w</literal> is used whenever you perform a "safe" operation
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(<function>MongoCollection::insert</function>,
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<function>MongoCollection::update</function>,
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<function>MongoCollection::remove</function>,
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<function>MongoCollection::save</function>, and
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<function>MongoCollection::ensureIndex</function> all support safe
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options). With the default value (1), a safe operation will return once
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the database server has the operation. If the server goes down before
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the operation has been replicated to a slave, it is possible to lose the
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operation forever. Thus, you can specify <literal>w</literal> to be
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higher than one and guarantee that at least one slave has the operation
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before it is considered successful.
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</para>
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<para>
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For example, if <literal>w</literal> is 2, the main server and one slave
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must have a record of the operation or the driver will throw a
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<classname>MongoCursorException</classname>. It is tempting to set
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<literal>w</literal> to the total number of slaves + master, but then if
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one slave is down the op will fail and an exception will be thrown, so
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usually <literal>w=2</literal> is safest (master+1 slave).
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</para>
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</listitem>
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</varlistentry>
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<varlistentry xml:id="mongodb.props.wtimeout">
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<term><varname>wtimeout</varname></term>
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<term>10000</term>
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<listitem>
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<para>
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The number of milliseconds to wait for <literal>MongoDB::$w</literal>
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replications to take place. Inherited by instances of
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<classname>MongoCollection</classname> derived from this.
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<literal>w</literal> functionality is only available in version 1.5.1+ of
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the MongoDB server and 1.0.8+ of the driver.
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</para>
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<para>
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Unless <literal>wtimeout</literal> is set, the server waits forever for
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replicating to <literal>w</literal> servers to finish. The driver
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defaults to waiting for 10 seconds, you can change this value to alter
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its behavior.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</section>
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<section>
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&reftitle.seealso;
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<para>
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MongoDB core docs on <link xlink:href="&url.mongodb.dochub.databases;">databases</link>.
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</para>
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</section>
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</partintro>
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&reference.mongo.entities.mongodb;
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</phpdoc:classref>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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