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indexzero c4c8d7b76f [doc] Updated docco docs
2011-09-18 21:39:13 -04:00

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<!DOCTYPE html> <html> <head> <title>memory.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> memory.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"> * memory.js: Simple memory storage engine for nconf configuration(s)</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">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></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 Memory (options)</h3>
<h4>@options {Object} Options for this instance</h4>
<p>Constructor function for the Memory nconf store which maintains
a nested json structure based on key delimiters <code>:</code>.</p>
<p>e.g. <code>my:nested:key</code> ==> <code>{ my: { nested: { key: } } }</code> </p> </td> <td class="code"> <div class="highlight"><pre><span class="kd">var</span> <span class="nx">Memory</span> <span class="o">=</span> <span class="nx">exports</span><span class="p">.</span><span class="nx">Memory</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="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">type</span> <span class="o">=</span> <span class="s1">&#39;memory&#39;</span><span class="p">;</span>
<span class="k">this</span><span class="p">.</span><span class="nx">store</span> <span class="o">=</span> <span class="p">{};</span>
<span class="k">this</span><span class="p">.</span><span class="nx">mtimes</span> <span class="o">=</span> <span class="p">{};</span>
<span class="k">this</span><span class="p">.</span><span class="nx">readOnly</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">loadFrom</span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">loadFrom</span> <span class="o">||</span> <span class="kc">null</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">loadFrom</span><span class="p">)</span> <span class="p">{</span>
<span class="k">this</span><span class="p">.</span><span class="nx">store</span> <span class="o">=</span> <span class="nx">common</span><span class="p">.</span><span class="nx">loadFilesSync</span><span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">loadFrom</span><span class="p">);</span>
<span class="p">}</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> <h3>function get (key)</h3>
<h4>@key {string} Key to retrieve for this instance.</h4>
<p>Retrieves the value for the specified key (if any).</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Memory</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="p">{</span>
<span class="kd">var</span> <span class="nx">target</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">store</span><span class="p">,</span>
<span class="nx">path</span> <span class="o">=</span> <span class="nx">common</span><span class="p">.</span><span class="nx">path</span><span class="p">(</span><span class="nx">key</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>Scope into the object to get the appropriate nested context</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">while</span> <span class="p">(</span><span class="nx">path</span><span class="p">.</span><span class="nx">length</span> <span class="o">&gt;</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">key</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">shift</span><span class="p">();</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="p">(</span><span class="nx">target</span> <span class="o">&amp;&amp;</span> <span class="nx">key</span> <span class="k">in</span> <span class="nx">target</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">target</span> <span class="o">=</span> <span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">];</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">path</span><span class="p">.</span><span class="nx">length</span> <span class="o">===</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">target</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 set (key, value)</h3>
<h4>@key {string} Key to set in this instance</h4>
<h4>@value {literal|Object} Value for the specified key</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">Memory</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="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">readOnly</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="kc">false</span><span class="p">;</span>
<span class="p">}</span>
<span class="kd">var</span> <span class="nx">target</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">store</span><span class="p">,</span>
<span class="nx">path</span> <span class="o">=</span> <span class="nx">common</span><span class="p">.</span><span class="nx">path</span><span class="p">(</span><span class="nx">key</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> <p>Update the <code>mtime</code> (modified time) of the key</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">this</span><span class="p">.</span><span class="nx">mtimes</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">=</span> <span class="nb">Date</span><span class="p">.</span><span class="nx">now</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> <p>Scope into the object to get the appropriate nested context</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">while</span> <span class="p">(</span><span class="nx">path</span><span class="p">.</span><span class="nx">length</span> <span class="o">&gt;</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">key</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">shift</span><span class="p">();</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">||</span> <span class="k">typeof</span> <span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">!==</span> <span class="s1">&#39;object&#39;</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">=</span> <span class="p">{};</span>
<span class="p">}</span>
<span class="nx">target</span> <span class="o">=</span> <span class="nx">target</span><span class="p">[</span><span class="nx">key</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> <p>Set the specified value in the nested JSON structure</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">key</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">shift</span><span class="p">();</span>
<span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">=</span> <span class="nx">value</span><span class="p">;</span>
<span class="k">return</span> <span class="kc">true</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 clear (key)</h3>
<h4>@key {string} Key to remove from this instance</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">Memory</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="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">readOnly</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="kc">false</span><span class="p">;</span>
<span class="p">}</span>
<span class="kd">var</span> <span class="nx">target</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">store</span><span class="p">,</span>
<span class="nx">path</span> <span class="o">=</span> <span class="nx">common</span><span class="p">.</span><span class="nx">path</span><span class="p">(</span><span class="nx">key</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>Remove the key from the set of <code>mtimes</code> (modified times)</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">delete</span> <span class="k">this</span><span class="p">.</span><span class="nx">mtimes</span><span class="p">[</span><span class="nx">key</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>Scope into the object to get the appropriate nested context</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">while</span> <span class="p">(</span><span class="nx">path</span><span class="p">.</span><span class="nx">length</span> <span class="o">&gt;</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">key</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">shift</span><span class="p">();</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">target</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="p">;</span>
<span class="p">}</span>
<span class="nx">target</span> <span class="o">=</span> <span class="nx">target</span><span class="p">[</span><span class="nx">key</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> <p>Delete the key from the nested JSON structure</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">key</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">shift</span><span class="p">();</span>
<span class="k">delete</span> <span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">];</span>
<span class="k">return</span> <span class="kc">true</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 merge (key, value)</h3>
<h4>@key {string} Key to merge the value into</h4>
<h4>@value {literal|Object} Value to merge into the key</h4>
<p>Merges the properties in <code>value</code> into the existing object value
at <code>key</code>. If the existing value <code>key</code> is not an Object, it will be
completely overwritten.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Memory</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="nx">key</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="k">this</span><span class="p">.</span><span class="nx">readOnly</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="kc">false</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> <p>If the key is not an <code>Object</code> or is an <code>Array</code>,
then simply set it. Merging is for Objects.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">value</span> <span class="o">!==</span> <span class="s1">&#39;object&#39;</span> <span class="o">||</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="p">{</span>
<span class="k">return</span> <span class="k">this</span><span class="p">.</span><span class="nx">set</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="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">target</span> <span class="o">=</span> <span class="k">this</span><span class="p">.</span><span class="nx">store</span><span class="p">,</span>
<span class="nx">path</span> <span class="o">=</span> <span class="nx">common</span><span class="p">.</span><span class="nx">path</span><span class="p">(</span><span class="nx">key</span><span class="p">),</span>
<span class="nx">fullKey</span> <span class="o">=</span> <span class="nx">key</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> <p>Update the <code>mtime</code> (modified time) of the key</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">this</span><span class="p">.</span><span class="nx">mtimes</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">=</span> <span class="nb">Date</span><span class="p">.</span><span class="nx">now</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> <p>Scope into the object to get the appropriate nested context</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">while</span> <span class="p">(</span><span class="nx">path</span><span class="p">.</span><span class="nx">length</span> <span class="o">&gt;</span> <span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">key</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">shift</span><span class="p">();</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">])</span> <span class="p">{</span>
<span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">=</span> <span class="p">{};</span>
<span class="p">}</span>
<span class="nx">target</span> <span class="o">=</span> <span class="nx">target</span><span class="p">[</span><span class="nx">key</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>Set the specified value in the nested JSON structure</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">key</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">shift</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> <p>If the current value at the key target is not an <code>Object</code>,
or is an <code>Array</code> then simply override it because the new value
is an Object.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">!==</span> <span class="s1">&#39;object&#39;</span> <span class="o">||</span> <span class="nb">Array</span><span class="p">.</span><span class="nx">isArray</span><span class="p">(</span><span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">]))</span> <span class="p">{</span>
<span class="nx">target</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">=</span> <span class="nx">value</span><span class="p">;</span>
<span class="k">return</span> <span class="kc">true</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">value</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">nested</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">merge</span><span class="p">(</span><span class="nx">fullKey</span> <span class="o">+</span> <span class="s1">&#39;:&#39;</span> <span class="o">+</span> <span class="nx">nested</span><span class="p">,</span> <span class="nx">value</span><span class="p">[</span><span class="nx">nested</span><span class="p">]);</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> <h3>function reset (callback)</h3>
<p>Clears all keys associated with this instance.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">Memory</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="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="k">this</span><span class="p">.</span><span class="nx">readOnly</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="kc">false</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">this</span><span class="p">.</span><span class="nx">mtimes</span> <span class="o">=</span> <span class="p">{};</span>
<span class="k">this</span><span class="p">.</span><span class="nx">store</span> <span class="o">=</span> <span class="p">{};</span>
<span class="k">return</span> <span class="kc">true</span><span class="p">;</span>
<span class="p">};</span>
</pre></div> </td> </tr> </tbody> </table> </div> </body> </html>
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