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nconf-lite/docs/nconf/provider.html
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2011-09-18 21:39:13 -04:00

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<!DOCTYPE html> <html> <head> <title>provider.js</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <link rel="stylesheet" media="all" href="../docco.css" /> </head> <body> <div id="container"> <div id="background"></div> <div id="jump_to"> Jump To &hellip; <div id="jump_wrapper"> <div id="jump_page"> <a class="source" href="..//nconf/common.html"> nconf/common.html </a> <a class="source" href="..//nconf/formats.html"> nconf/formats.html </a> <a class="source" href="..//nconf/provider.html"> nconf/provider.html </a> <a class="source" href="..//nconf/stores/file.html"> nconf/stores/file.html </a> <a class="source" href="..//nconf/stores/memory.html"> nconf/stores/memory.html </a> <a class="source" href="..//nconf/stores/system.html"> nconf/stores/system.html </a> <a class="source" href="..//nconf/stores.html"> nconf/stores.html </a> <a class="source" href="..//nconf.html"> nconf.html </a> </div> </div> </div> <table cellpadding="0" cellspacing="0"> <thead> <tr> <th class="docs"> <h1> provider.js </h1> </th> <th class="code"> </th> </tr> </thead> <tbody> <tr id="section-1"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-1">&#182;</a> </div> </td> <td class="code"> <div class="highlight"><pre><span class="cm">/*</span>
<span class="cm"> * provider.js: Abstraction providing an interface into pluggable configuration storage.</span>
<span class="cm"> *</span>
<span class="cm"> * (C) 2011, Charlie Robbins</span>
<span class="cm"> *</span>
<span class="cm"> */</span>
<span class="kd">var</span> <span class="nx">async</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;async&#39;</span><span class="p">),</span>
<span class="nx">common</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;./common&#39;</span><span class="p">),</span>
<span class="nx">stores</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;./stores&#39;</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-2"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-2">&#182;</a> </div> <h3>function Provider (options)</h3>
<h4>@options {Object} Options for this instance.</h4>
<p>Constructor function for the Provider object responsible
for exposing the pluggable storage features of <code>nconf</code>.</p> </td> <td class="code"> <div class="highlight"><pre><span class="kd">var</span> <span class="nx">Provider</span> <span class="o">=</span> <span class="nx">exports</span><span class="p">.</span><span class="nx">Provider</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">options</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">self</span> <span class="o">=</span> <span class="k">this</span><span class="p">;</span>
</pre></div> </td> </tr> <tr id="section-3"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-3">&#182;</a> </div> <p>Setup default options for working with <code>stores</code>,
<code>overrides</code>, <code>process.env</code> and <code>process.argv</code>.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">options</span> <span class="o">=</span> <span class="nx">options</span> <span class="o">||</span> <span class="p">{};</span>
<span class="k">this</span><span class="p">.</span><span class="nx">_overrides</span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">overrides</span> <span class="o">||</span> <span class="kc">null</span><span class="p">;</span>
<span class="k">this</span><span class="p">.</span><span class="nx">_argv</span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">argv</span> <span class="o">||</span> <span class="kc">false</span><span class="p">;</span>
<span class="k">this</span><span class="p">.</span><span class="nx">_env</span><span class="err"> </span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">env</span> <span class="o">||</span> <span class="kc">false</span><span class="p">;</span>
<span class="k">this</span><span class="p">.</span><span class="nx">_reserved</span> <span class="o">=</span> <span class="nb">Object</span><span class="p">.</span><span class="nx">keys</span><span class="p">(</span><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">);</span>
<span class="k">this</span><span class="p">.</span><span class="nx">_stores</span> <span class="o">=</span> <span class="p">[];</span>
</pre></div> </td> </tr> <tr id="section-4"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-4">&#182;</a> </div> <p>Add the default <code>system</code> store for working with
<code>overrides</code>, <code>process.env</code>, <code>process.argv</code> and
a simple in-memory objects.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">this</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span><span class="s1">&#39;system&#39;</span><span class="p">,</span> <span class="nx">options</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">type</span><span class="p">)</span> <span class="p">{</span>
<span class="k">this</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">type</span><span class="p">,</span> <span class="nx">options</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">store</span><span class="p">)</span> <span class="p">{</span>
<span class="k">this</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">store</span><span class="p">.</span><span class="nx">name</span> <span class="o">||</span> <span class="nx">options</span><span class="p">.</span><span class="nx">store</span><span class="p">.</span><span class="nx">type</span><span class="p">,</span> <span class="nx">options</span><span class="p">.</span><span class="nx">store</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">stores</span><span class="p">)</span> <span class="p">{</span>
<span class="nb">Object</span><span class="p">.</span><span class="nx">keys</span><span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">stores</span><span class="p">).</span><span class="nx">forEach</span><span class="p">(</span><span class="kd">function</span> <span class="p">(</span><span class="nx">store</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">self</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span><span class="nx">store</span><span class="p">.</span><span class="nx">name</span> <span class="o">||</span> <span class="nx">store</span><span class="p">.</span><span class="nx">type</span><span class="p">,</span> <span class="nx">store</span><span class="p">);</span>
<span class="p">});</span>
<span class="p">}</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-5"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-5">&#182;</a> </div> <h3>function use (name, options)</h3>
<h4>@type {string} Type of the nconf store to use.</h4>
<h4>@options {Object} Options for the store instance.</h4>
<p>Adds (or replaces) a new store with the specified <code>name</code>
and <code>options</code>. If <code>options.type</code> is not set, then <code>name</code>
will be used instead:</p>
<p>provider.use('file');
provider.use('file', { type: 'file', filename: '/path/to/userconf' })</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">use</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">name</span> <span class="o">===</span> <span class="s1">&#39;system&#39;</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_reserved</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">!==</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;Cannot use reserved name: &#39;</span> <span class="o">+</span> <span class="nx">name</span><span class="p">);</span>
<span class="p">}</span>
<span class="nx">options</span> <span class="o">=</span> <span class="nx">options</span> <span class="o">||</span> <span class="p">{};</span>
<span class="kd">var</span> <span class="nx">type</span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">type</span> <span class="o">||</span> <span class="nx">name</span><span class="p">;</span>
<span class="kd">function</span> <span class="nx">sameOptions</span> <span class="p">(</span><span class="nx">store</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nb">Object</span><span class="p">.</span><span class="nx">keys</span><span class="p">(</span><span class="nx">options</span><span class="p">).</span><span class="nx">every</span><span class="p">(</span><span class="kd">function</span> <span class="p">(</span><span class="nx">key</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">options</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">===</span> <span class="nx">store</span><span class="p">[</span><span class="nx">key</span><span class="p">];</span>
<span class="p">});</span>
<span class="p">}</span>
<span class="kd">var</span> <span class="nx">store</span> <span class="o">=</span> <span class="k">this</span><span class="p">[</span><span class="nx">name</span><span class="p">],</span>
<span class="nx">update</span> <span class="o">=</span> <span class="nx">store</span> <span class="o">&amp;&amp;</span> <span class="o">!</span><span class="nx">sameOptions</span><span class="p">(</span><span class="nx">store</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">store</span> <span class="o">||</span> <span class="nx">update</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">update</span><span class="p">)</span> <span class="p">{</span>
<span class="k">this</span><span class="p">.</span><span class="nx">remove</span><span class="p">(</span><span class="nx">name</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">this</span><span class="p">.</span><span class="nx">add</span><span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">options</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">return</span> <span class="k">this</span><span class="p">;</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-6"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-6">&#182;</a> </div> <h3>function add (name, options)</h3>
<h4>@name {string} Name of the store to add to this instance</h4>
<h4>@options {Object} Options for the store to create</h4>
<p>Adds a new store with the specified <code>name</code> and <code>options</code>. If <code>options.type</code>
is not set, then <code>name</code> will be used instead:</p>
<p>provider.add('memory');
provider.add('userconf', { type: 'file', filename: '/path/to/userconf' })</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">add</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_reserved</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">!==</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;Cannot use reserved name: &#39;</span> <span class="o">+</span> <span class="nx">name</span><span class="p">);</span>
<span class="p">}</span>
<span class="nx">options</span> <span class="o">=</span> <span class="nx">options</span> <span class="o">||</span> <span class="p">{};</span>
<span class="kd">var</span> <span class="nx">type</span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">type</span> <span class="o">||</span> <span class="nx">name</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nb">Object</span><span class="p">.</span><span class="nx">keys</span><span class="p">(</span><span class="nx">stores</span><span class="p">).</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">common</span><span class="p">.</span><span class="nx">capitalize</span><span class="p">(</span><span class="nx">type</span><span class="p">))</span> <span class="o">===</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;Cannot add store with unknown type: &#39;</span> <span class="o">+</span> <span class="nx">type</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">this</span><span class="p">[</span><span class="nx">name</span><span class="p">]</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">create</span><span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="nx">options</span><span class="p">);</span>
<span class="k">this</span><span class="p">.</span><span class="nx">_stores</span><span class="p">.</span><span class="nx">push</span><span class="p">(</span><span class="nx">name</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">[</span><span class="nx">name</span><span class="p">].</span><span class="nx">loadSync</span><span class="p">)</span> <span class="p">{</span>
<span class="k">this</span><span class="p">[</span><span class="nx">name</span><span class="p">].</span><span class="nx">loadSync</span><span class="p">();</span>
<span class="p">}</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-7"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-7">&#182;</a> </div> <h3>function remove (name)</h3>
<h4>@name {string} Name of the store to remove from this instance</h4>
<p>Removes a store with the specified <code>name</code> from this instance. Users
are allowed to pass in a type argument (e.g. <code>memory</code>) as name if
this was used in the call to <code>.add()</code>.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">remove</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_reserved</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="o">!==</span> <span class="o">-</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;Cannot use reserved name: &#39;</span> <span class="o">+</span> <span class="nx">name</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="k">this</span><span class="p">[</span><span class="nx">name</span><span class="p">])</span> <span class="p">{</span>
<span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;Cannot remove store that does not exist: &#39;</span> <span class="o">+</span> <span class="nx">name</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">delete</span> <span class="k">this</span><span class="p">[</span><span class="nx">name</span><span class="p">];</span>
<span class="k">this</span><span class="p">.</span><span class="nx">_stores</span><span class="p">.</span><span class="nx">splice</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_stores</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">name</span><span class="p">),</span> <span class="mi">1</span><span class="p">);</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-8"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-8">&#182;</a> </div> <h3>function create (type, options)</h3>
<h4>@type {string} Type of the nconf store to use.</h4>
<h4>@options {Object} Options for the store instance.</h4>
<p>Creates a store of the specified <code>type</code> using the
specified <code>options</code>.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">create</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">type</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="k">new</span> <span class="nx">stores</span><span class="p">[</span><span class="nx">common</span><span class="p">.</span><span class="nx">capitalize</span><span class="p">(</span><span class="nx">type</span><span class="p">.</span><span class="nx">toLowerCase</span><span class="p">())](</span><span class="nx">options</span><span class="p">);</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-9"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-9">&#182;</a> </div> <h3>function get (key, callback)</h3>
<h4>@key {string} Key to retrieve for this instance.</h4>
<h4>@callback {function} <strong>Optional</strong> Continuation to respond to when complete.</h4>
<p>Retrieves the value for the specified key (if any).</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">get</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">key</span><span class="p">,</span> <span class="nx">callback</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-10"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-10">&#182;</a> </div> <p>If there is no callback we can short-circuit into the default
logic for traversing stores.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">_execute</span><span class="p">(</span><span class="s1">&#39;get&#39;</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">callback</span><span class="p">);</span>
<span class="p">}</span>
</pre></div> </td> </tr> <tr id="section-11"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-11">&#182;</a> </div> <p>Otherwise the asynchronous, hierarchical <code>get</code> is
slightly more complicated because we do not need to traverse
the entire set of stores, but up until there is a defined value.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="kd">var</span> <span class="nx">current</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span>
<span class="nx">self</span> <span class="o">=</span> <span class="k">this</span><span class="p">,</span>
<span class="nx">response</span><span class="p">;</span>
<span class="nx">async</span><span class="p">.</span><span class="nx">whilst</span><span class="p">(</span><span class="kd">function</span> <span class="p">()</span> <span class="p">{</span>
<span class="k">return</span> <span class="k">typeof</span> <span class="nx">response</span> <span class="o">===</span> <span class="s1">&#39;undefined&#39;</span> <span class="o">&amp;&amp;</span> <span class="nx">current</span> <span class="o">&lt;</span> <span class="nx">self</span><span class="p">.</span><span class="nx">_stores</span><span class="p">.</span><span class="nx">length</span><span class="p">;</span>
<span class="p">},</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">next</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">store</span> <span class="o">=</span> <span class="nx">self</span><span class="p">[</span><span class="nx">self</span><span class="p">.</span><span class="nx">_stores</span><span class="p">[</span><span class="nx">current</span><span class="p">]];</span>
<span class="nx">current</span><span class="o">++</span><span class="p">;</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">store</span><span class="p">.</span><span class="nx">get</span><span class="p">.</span><span class="nx">length</span> <span class="o">&gt;=</span> <span class="mi">2</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">store</span><span class="p">.</span><span class="nx">get</span><span class="p">(</span><span class="nx">key</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">err</span><span class="p">,</span> <span class="nx">value</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">next</span><span class="p">(</span><span class="nx">err</span><span class="p">);</span>
<span class="p">}</span>
<span class="nx">response</span> <span class="o">=</span> <span class="nx">value</span><span class="p">;</span>
<span class="nx">next</span><span class="p">();</span>
<span class="p">});</span>
<span class="p">}</span>
<span class="nx">response</span> <span class="o">=</span> <span class="nx">store</span><span class="p">.</span><span class="nx">get</span><span class="p">(</span><span class="nx">key</span><span class="p">);</span>
<span class="nx">next</span><span class="p">();</span>
<span class="p">},</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">err</span> <span class="o">?</span> <span class="nx">callback</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="o">:</span> <span class="nx">callback</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span> <span class="nx">response</span><span class="p">);</span>
<span class="p">});</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-12"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-12">&#182;</a> </div> <h3>function set (key, value, callback)</h3>
<h4>@key {string} Key to set in this instance</h4>
<h4>@value {literal|Object} Value for the specified key</h4>
<h4>@callback {function} <strong>Optional</strong> Continuation to respond to when complete.</h4>
<p>Sets the <code>value</code> for the specified <code>key</code> in this instance.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">set</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">key</span><span class="p">,</span> <span class="nx">value</span><span class="p">,</span> <span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">_execute</span><span class="p">(</span><span class="s1">&#39;set&#39;</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">value</span><span class="p">,</span> <span class="nx">callback</span><span class="p">);</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-13"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-13">&#182;</a> </div> <h3>function reset (callback)</h3>
<h4>@callback {function} <strong>Optional</strong> Continuation to respond to when complete.</h4>
<p>Clears all keys associated with this instance.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">reset</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">_execute</span><span class="p">(</span><span class="s1">&#39;reset&#39;</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="nx">callback</span><span class="p">);</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-14"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-14">&#182;</a> </div> <h3>function clear (key, callback)</h3>
<h4>@key {string} Key to remove from this instance</h4>
<h4>@callback {function} <strong>Optional</strong> Continuation to respond to when complete.</h4>
<p>Removes the value for the specified <code>key</code> from this instance.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">clear</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">key</span><span class="p">,</span> <span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">_execute</span><span class="p">(</span><span class="s1">&#39;clear&#39;</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">callback</span><span class="p">);</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-15"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-15">&#182;</a> </div> <h3>function merge ([key,] value [, callback])</h3>
<h4>@key {string} Key to merge the value into</h4>
<h4>@value {literal|Object} Value to merge into the key</h4>
<h4>@callback {function} <strong>Optional</strong> Continuation to respond to when complete.</h4>
<p>Merges the properties in <code>value</code> into the existing object value at <code>key</code>. </p>
<ol>
<li>If the existing value <code>key</code> is not an Object, it will be completely overwritten.</li>
<li>If <code>key</code> is not supplied, then the <code>value</code> will be merged into the root.</li>
</ol> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">merge</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">()</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">self</span> <span class="o">=</span> <span class="k">this</span><span class="p">,</span>
<span class="nx">args</span> <span class="o">=</span> <span class="nb">Array</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">slice</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="nx">arguments</span><span class="p">),</span>
<span class="nx">callback</span> <span class="o">=</span> <span class="k">typeof</span> <span class="nx">args</span><span class="p">[</span><span class="nx">args</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">===</span> <span class="s1">&#39;function&#39;</span> <span class="o">&amp;&amp;</span> <span class="nx">args</span><span class="p">.</span><span class="nx">pop</span><span class="p">(),</span>
<span class="nx">value</span> <span class="o">=</span> <span class="nx">args</span><span class="p">.</span><span class="nx">pop</span><span class="p">(),</span>
<span class="nx">key</span> <span class="o">=</span> <span class="nx">args</span><span class="p">.</span><span class="nx">pop</span><span class="p">();</span>
<span class="kd">function</span> <span class="nx">mergeProperty</span> <span class="p">(</span><span class="nx">prop</span><span class="p">,</span> <span class="nx">next</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">self</span><span class="p">.</span><span class="nx">_execute</span><span class="p">(</span><span class="s1">&#39;merge&#39;</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="nx">prop</span><span class="p">,</span> <span class="nx">value</span><span class="p">[</span><span class="nx">prop</span><span class="p">],</span> <span class="nx">next</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">key</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nb">Array</span><span class="p">.</span><span class="nx">isArray</span><span class="p">(</span><span class="nx">value</span><span class="p">)</span> <span class="o">||</span> <span class="k">typeof</span> <span class="nx">value</span> <span class="o">!==</span> <span class="s1">&#39;object&#39;</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">onError</span><span class="p">(</span><span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;Cannot merge non-Object into top-level.&#39;</span><span class="p">),</span> <span class="nx">callback</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">return</span> <span class="nx">async</span><span class="p">.</span><span class="nx">forEach</span><span class="p">(</span><span class="nb">Object</span><span class="p">.</span><span class="nx">keys</span><span class="p">(</span><span class="nx">value</span><span class="p">),</span> <span class="nx">mergeProperty</span><span class="p">,</span> <span class="nx">callback</span> <span class="o">||</span> <span class="kd">function</span> <span class="p">()</span> <span class="p">{</span> <span class="p">})</span>
<span class="p">}</span>
<span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">_execute</span><span class="p">(</span><span class="s1">&#39;merge&#39;</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="nx">key</span><span class="p">,</span> <span class="nx">value</span><span class="p">,</span> <span class="nx">callback</span><span class="p">);</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-16"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-16">&#182;</a> </div> <h3>function load (callback)</h3>
<h4>@callback {function} Continuation to respond to when complete.</h4>
<p>Responds with an Object representing all keys associated in this instance.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">load</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">self</span> <span class="o">=</span> <span class="k">this</span><span class="p">;</span>
<span class="kd">function</span> <span class="nx">loadStoreSync</span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">store</span> <span class="o">=</span> <span class="nx">self</span><span class="p">[</span><span class="nx">name</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">store</span><span class="p">.</span><span class="nx">loadSync</span><span class="p">)</span> <span class="p">{</span>
<span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;nconf store &#39;</span> <span class="o">+</span> <span class="nx">store</span><span class="p">.</span><span class="nx">type</span> <span class="o">+</span> <span class="s1">&#39; has no loadSync() method&#39;</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">return</span> <span class="nx">store</span><span class="p">.</span><span class="nx">loadSync</span><span class="p">();</span>
<span class="p">}</span>
<span class="kd">function</span> <span class="nx">loadStore</span><span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">next</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">store</span> <span class="o">=</span> <span class="nx">self</span><span class="p">[</span><span class="nx">name</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">store</span><span class="p">.</span><span class="nx">load</span> <span class="o">&amp;&amp;</span> <span class="o">!</span><span class="nx">store</span><span class="p">.</span><span class="nx">loadSync</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">next</span><span class="p">(</span><span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;nconf store &#39;</span> <span class="o">+</span> <span class="nx">store</span><span class="p">.</span><span class="nx">type</span> <span class="o">+</span> <span class="s1">&#39; has no load() method&#39;</span><span class="p">));</span>
<span class="p">}</span>
<span class="k">return</span> <span class="nx">store</span><span class="p">.</span><span class="nx">loadSync</span>
<span class="o">?</span> <span class="nx">next</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span> <span class="nx">store</span><span class="p">.</span><span class="nx">loadSync</span><span class="p">())</span>
<span class="o">:</span> <span class="nx">store</span><span class="p">.</span><span class="nx">load</span><span class="p">(</span><span class="nx">next</span><span class="p">);</span>
<span class="p">}</span>
</pre></div> </td> </tr> <tr id="section-17"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-17">&#182;</a> </div> <p>If we don't have a callback and the current
store is capable of loading synchronously
then do so.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">common</span><span class="p">.</span><span class="nx">merge</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_stores</span><span class="p">.</span><span class="nx">map</span><span class="p">(</span><span class="nx">loadStoreSync</span><span class="p">));</span>
<span class="p">}</span>
<span class="nx">async</span><span class="p">.</span><span class="nx">map</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_stores</span><span class="p">,</span> <span class="nx">loadStore</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">err</span><span class="p">,</span> <span class="nx">objs</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">err</span> <span class="o">?</span> <span class="nx">callback</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="o">:</span> <span class="nx">callback</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span> <span class="nx">common</span><span class="p">.</span><span class="nx">merge</span><span class="p">(</span><span class="nx">objs</span><span class="p">));</span>
<span class="p">});</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-18"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-18">&#182;</a> </div> <h3>function save (value, callback)</h3>
<h4>@value {Object} <strong>Optional</strong> Config object to set for this instance</h4>
<h4>@callback {function} Continuation to respond to when complete.</h4>
<p>Removes any existing configuration settings that may exist in this
instance and then adds all key-value pairs in <code>value</code>. </p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">save</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">value</span><span class="p">,</span> <span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">callback</span> <span class="o">&amp;&amp;</span> <span class="k">typeof</span> <span class="nx">value</span> <span class="o">===</span> <span class="s1">&#39;function&#39;</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">callback</span> <span class="o">=</span> <span class="nx">value</span><span class="p">;</span>
<span class="nx">value</span> <span class="o">=</span> <span class="kc">null</span><span class="p">;</span>
<span class="p">}</span>
<span class="kd">var</span> <span class="nx">self</span> <span class="o">=</span> <span class="k">this</span><span class="p">;</span>
<span class="kd">function</span> <span class="nx">saveStoreSync</span><span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">store</span> <span class="o">=</span> <span class="nx">self</span><span class="p">[</span><span class="nx">name</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">store</span><span class="p">.</span><span class="nx">saveSync</span><span class="p">)</span> <span class="p">{</span>
<span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;nconf store &#39;</span> <span class="o">+</span> <span class="nx">store</span><span class="p">.</span><span class="nx">type</span> <span class="o">+</span> <span class="s1">&#39; has no saveSync() method&#39;</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">return</span> <span class="nx">store</span><span class="p">.</span><span class="nx">saveSync</span><span class="p">();</span>
<span class="p">}</span>
<span class="kd">function</span> <span class="nx">saveStore</span><span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">next</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">store</span> <span class="o">=</span> <span class="nx">self</span><span class="p">[</span><span class="nx">name</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">store</span><span class="p">.</span><span class="nx">save</span> <span class="o">&amp;&amp;</span> <span class="o">!</span><span class="nx">store</span><span class="p">.</span><span class="nx">saveSync</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">next</span><span class="p">(</span><span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;nconf store &#39;</span> <span class="o">+</span> <span class="nx">store</span><span class="p">.</span><span class="nx">type</span> <span class="o">+</span> <span class="s1">&#39; has no save() method&#39;</span><span class="p">));</span>
<span class="p">}</span>
<span class="k">return</span> <span class="nx">store</span><span class="p">.</span><span class="nx">saveSync</span>
<span class="o">?</span> <span class="nx">next</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span> <span class="nx">store</span><span class="p">.</span><span class="nx">saveSync</span><span class="p">())</span>
<span class="o">:</span> <span class="nx">store</span><span class="p">.</span><span class="nx">save</span><span class="p">(</span><span class="nx">next</span><span class="p">);</span>
<span class="p">}</span>
</pre></div> </td> </tr> <tr id="section-19"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-19">&#182;</a> </div> <p>If we don't have a callback and the current
store is capable of saving synchronously
then do so.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">common</span><span class="p">.</span><span class="nx">merge</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_stores</span><span class="p">.</span><span class="nx">map</span><span class="p">(</span><span class="nx">saveStoreSync</span><span class="p">));</span>
<span class="p">}</span>
<span class="nx">async</span><span class="p">.</span><span class="nx">map</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">_stores</span><span class="p">,</span> <span class="nx">saveStore</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">err</span><span class="p">,</span> <span class="nx">objs</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">err</span> <span class="o">?</span> <span class="nx">callback</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="o">:</span> <span class="nx">callback</span><span class="p">();</span>
<span class="p">});</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-20"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-20">&#182;</a> </div> <h3>@private function _execute (action, syncLength, [arguments])</h3>
<h4>@action {string} Action to execute on <code>this.store</code>.</h4>
<h4>@syncLength {number} Function length of the sync version.</h4>
<h4>@arguments {Array} Arguments array to apply to the action</h4>
<p>Executes the specified <code>action</code> on all stores for this instance, ensuring a callback supplied
to a synchronous store function is still invoked.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">_execute</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">action</span><span class="p">,</span> <span class="nx">syncLength</span> <span class="cm">/* [arguments] */</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">args</span> <span class="o">=</span> <span class="nb">Array</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">slice</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="nx">arguments</span><span class="p">,</span> <span class="mi">2</span><span class="p">),</span>
<span class="nx">callback</span> <span class="o">=</span> <span class="k">typeof</span> <span class="nx">args</span><span class="p">[</span><span class="nx">args</span><span class="p">.</span><span class="nx">length</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">===</span> <span class="s1">&#39;function&#39;</span> <span class="o">&amp;&amp;</span> <span class="nx">args</span><span class="p">.</span><span class="nx">pop</span><span class="p">(),</span>
<span class="nx">self</span> <span class="o">=</span> <span class="k">this</span><span class="p">,</span>
<span class="nx">response</span><span class="p">;</span>
<span class="kd">function</span> <span class="nx">runAction</span> <span class="p">(</span><span class="nx">name</span><span class="p">,</span> <span class="nx">next</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">store</span> <span class="o">=</span> <span class="nx">self</span><span class="p">[</span><span class="nx">name</span><span class="p">]</span>
<span class="k">return</span> <span class="nx">store</span><span class="p">[</span><span class="nx">action</span><span class="p">].</span><span class="nx">length</span> <span class="o">&gt;</span> <span class="nx">syncLength</span>
<span class="o">?</span> <span class="nx">store</span><span class="p">[</span><span class="nx">action</span><span class="p">].</span><span class="nx">apply</span><span class="p">(</span><span class="nx">store</span><span class="p">,</span> <span class="nx">args</span><span class="p">.</span><span class="nx">concat</span><span class="p">(</span><span class="nx">next</span><span class="p">))</span>
<span class="o">:</span> <span class="nx">next</span><span class="p">(</span><span class="kc">null</span><span class="p">,</span> <span class="nx">store</span><span class="p">[</span><span class="nx">action</span><span class="p">].</span><span class="nx">apply</span><span class="p">(</span><span class="nx">store</span><span class="p">,</span> <span class="nx">args</span><span class="p">));</span>
<span class="p">}</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">async</span><span class="p">.</span><span class="nx">forEach</span><span class="p">(</span><span class="nx">self</span><span class="p">.</span><span class="nx">_stores</span><span class="p">,</span> <span class="nx">runAction</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">err</span> <span class="o">?</span> <span class="nx">callback</span><span class="p">(</span><span class="nx">err</span><span class="p">)</span> <span class="o">:</span> <span class="nx">callback</span><span class="p">();</span>
<span class="p">});</span>
<span class="p">}</span>
<span class="k">this</span><span class="p">.</span><span class="nx">_stores</span><span class="p">.</span><span class="nx">forEach</span><span class="p">(</span><span class="kd">function</span> <span class="p">(</span><span class="nx">name</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">store</span> <span class="o">=</span> <span class="nx">self</span><span class="p">[</span><span class="nx">name</span><span class="p">];</span>
<span class="nx">response</span> <span class="o">=</span> <span class="nx">store</span><span class="p">[</span><span class="nx">action</span><span class="p">].</span><span class="nx">apply</span><span class="p">(</span><span class="nx">store</span><span class="p">,</span> <span class="nx">args</span><span class="p">);</span>
<span class="p">});</span>
<span class="k">return</span> <span class="nx">response</span><span class="p">;</span>
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-21"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-21">&#182;</a> </div> <h3>@argv {boolean}</h3>
<p>Gets or sets a property representing overrides which supercede all
other values for this instance.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">__defineSetter__</span><span class="p">(</span><span class="s1">&#39;overrides&#39;</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">val</span><span class="p">)</span> <span class="p">{</span> <span class="nx">updateSystem</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="k">this</span><span class="p">,</span> <span class="s1">&#39;overrides&#39;</span><span class="p">,</span> <span class="nx">val</span><span class="p">)</span> <span class="p">});</span>
<span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">__defineGetter__</span><span class="p">(</span><span class="s1">&#39;overrides&#39;</span><span class="p">,</span> <span class="kd">function</span> <span class="p">()</span> <span class="p">{</span> <span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">_argv</span> <span class="p">});</span></pre></div> </td> </tr> <tr id="section-22"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-22">&#182;</a> </div> <h3>@argv {boolean}</h3>
<p>Gets or sets a property indicating if we should wrap calls to <code>.get</code>
by checking <code>optimist.argv</code>. Can be a boolean or the pass-thru
options for <code>optimist</code>.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">__defineSetter__</span><span class="p">(</span><span class="s1">&#39;argv&#39;</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">val</span><span class="p">)</span> <span class="p">{</span> <span class="nx">updateSystem</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="k">this</span><span class="p">,</span> <span class="s1">&#39;argv&#39;</span><span class="p">,</span> <span class="nx">val</span><span class="p">)</span> <span class="p">});</span>
<span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">__defineGetter__</span><span class="p">(</span><span class="s1">&#39;argv&#39;</span><span class="p">,</span> <span class="kd">function</span> <span class="p">()</span> <span class="p">{</span> <span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">_argv</span> <span class="p">});</span></pre></div> </td> </tr> <tr id="section-23"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-23">&#182;</a> </div> <h3>@env {boolean}</h3>
<p>Gets or sets a property indicating if we should wrap calls to <code>.get</code>
by checking <code>process.env</code>. Can be a boolean or an Array of
environment variables to extract.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">__defineSetter__</span><span class="p">(</span><span class="s1">&#39;env&#39;</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">val</span><span class="p">)</span> <span class="p">{</span> <span class="nx">updateSystem</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="k">this</span><span class="p">,</span> <span class="s1">&#39;env&#39;</span><span class="p">,</span> <span class="nx">val</span><span class="p">)</span> <span class="p">});</span>
<span class="nx">Provider</span><span class="p">.</span><span class="nx">prototype</span><span class="p">.</span><span class="nx">__defineGetter__</span><span class="p">(</span><span class="s1">&#39;env&#39;</span><span class="p">,</span> <span class="kd">function</span> <span class="p">()</span> <span class="p">{</span> <span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">_env</span> <span class="p">});</span></pre></div> </td> </tr> <tr id="section-24"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-24">&#182;</a> </div> <p>Throw the <code>err</code> if a callback is not supplied</p> </td> <td class="code"> <div class="highlight"><pre><span class="kd">function</span> <span class="nx">onError</span><span class="p">(</span><span class="nx">err</span><span class="p">,</span> <span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">callback</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">callback</span><span class="p">(</span><span class="nx">err</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">throw</span> <span class="nx">err</span><span class="p">;</span>
<span class="p">}</span></pre></div> </td> </tr> <tr id="section-25"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-25">&#182;</a> </div> <p>Helper function for working with the
default <code>system</code> store for providers.</p> </td> <td class="code"> <div class="highlight"><pre><span class="kd">function</span> <span class="nx">updateSystem</span><span class="p">(</span><span class="nx">prop</span><span class="p">,</span> <span class="nx">value</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">system</span> <span class="o">=</span> <span class="k">this</span><span class="p">[</span><span class="s1">&#39;system&#39;</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">system</span><span class="p">[</span><span class="nx">prop</span><span class="p">]</span> <span class="o">===</span> <span class="nx">value</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span><span class="p">;</span>
<span class="p">}</span>
<span class="nx">value</span> <span class="o">=</span> <span class="nx">value</span> <span class="o">||</span> <span class="kc">false</span><span class="p">;</span>
<span class="k">this</span><span class="p">[</span><span class="s1">&#39;_&#39;</span> <span class="o">+</span> <span class="nx">prop</span><span class="p">]</span> <span class="o">=</span> <span class="nx">value</span><span class="p">;</span>
<span class="nx">system</span><span class="p">[</span><span class="nx">prop</span><span class="p">]</span> <span class="o">=</span> <span class="nx">value</span><span class="p">;</span>
<span class="nx">system</span><span class="p">.</span><span class="nx">loadSync</span><span class="p">();</span>
<span class="p">}</span>
</pre></div> </td> </tr> </tbody> </table> </div> </body> </html>
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