<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->

<refentry xml:id="zookeeper.get" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>Zookeeper::get</refname>
  <refpurpose>Gets the data associated with a node synchronously</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis role="oop">
   <modifier>public</modifier>
   <type>string</type><methodname>Zookeeper::get</methodname>
   <methodparam><type>string</type><parameter>path</parameter></methodparam>
   <methodparam choice="opt"><type>callable</type><parameter>watcher_cb</parameter><initializer>&null;</initializer></methodparam>
   <methodparam choice="opt"><type>array</type><parameter role="reference">stat</parameter><initializer>&null;</initializer></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>max_size</parameter><initializer>0</initializer></methodparam>
  </methodsynopsis>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <variablelist>
   <varlistentry>
    <term><parameter>path</parameter></term>
    <listitem>
     <para>
      The name of the node. Expressed as a file name with slashes separating ancestors of the node.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>watcher_cb</parameter></term>
    <listitem>
     <para>
      If nonzero, a watch will be set at the server to notify the client if the node changes.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>stat</parameter></term>
    <listitem>
     <para>
      If not NULL, will hold the value of stat for the path on return.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>max_size</parameter></term>
    <listitem>
     <para>
      Max size of the data. If 0 is used, this method will return the whole data.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns the data on success, and false on failure.
  </para>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
  <para>
   This method emits PHP error/warning when parameters count or types are wrong or fail to get value from node.
  </para>
  <caution>
    <para>
      Since version 0.3.0, this method emits <classname>ZookeeperException</classname> and it's derivatives.
    </para>
  </caution>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <example xml:id="zookeeper.get.example.basic">
   <title><methodname>Zookeeper::get</methodname> example</title>
   <para>
     Get value from node.
   </para>
   <programlisting role="php">
<![CDATA[
<?php
$zookeeper = new Zookeeper('locahost:2181');
$path = '/path/to/node';
$value = 'nodevalue';
$zookeeper->set($path, $value);

$r = $zookeeper->get($path);
if ($r)
  echo $r;
else
  echo 'ERR';
?>
]]>
   </programlisting>
   &example.outputs;
   <screen>
<![CDATA[
nodevalue
]]>
   </screen>
  </example>

  <example xml:id="zookeeper.get.example.stat">
   <title><methodname>Zookeeper::get</methodname> stat example</title>
   <para>
     Get node stat info.
   </para>
   <programlisting role="php">
<![CDATA[
<?php
$zookeeper = new Zookeeper('localhost:2181');
$path = '/path/to/node';
$stat = [];
$zookeeper->get($path, null, $stat);
var_dump($stat);
?>
]]>
   </programlisting>
   &example.outputs;
   <screen>
<![CDATA[
array(11) {
  ["czxid"]=>
  float(0)
  ["mzxid"]=>
  float(0)
  ["ctime"]=>
  float(0)
  ["mtime"]=>
  float(0)
  ["version"]=>
  int(0)
  ["cversion"]=>
  int(-2)
  ["aversion"]=>
  int(0)
  ["ephemeralOwner"]=>
  float(0)
  ["dataLength"]=>
  int(0)
  ["numChildren"]=>
  int(2)
  ["pzxid"]=>
  float(0)
}
]]>
   </screen>
  </example>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <simplelist>
   <member><methodname>Zookeeper::set</methodname></member>
   <member><classname>ZookeeperException</classname></member>
  </simplelist>
 </refsect1>

</refentry>

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