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+ <div id="documentation">
+ <h1 class="class">MCollective::Facts::Base</h1>
+
+ <div id="description">
+ <p>
+A base class for fact providers, to make a new fully functional fact
+provider inherit from this and simply provide a self.get_facts method that
+returns a hash like:
+</p>
+<pre>
+ {"foo" => "bar",
+ "bar" => "baz"}
+</pre>
+
+ </div>
+
+ <!-- Constants -->
+
+
+ <!-- Attributes -->
+
+
+ <!-- Methods -->
+
+ <div id="public-class-method-details" class="method-section section">
+ <h3 class="section-header">Public Class Methods</h3>
+
+
+ <div id="inherited-method" class="method-detail ">
+ <a name="M000260"></a>
+
+ <div class="method-heading">
+
+ <span class="method-name">inherited</span><span
+ class="method-args">(klass)</span>
+ <span class="method-click-advice">click to toggle source</span>
+
+ </div>
+
+ <div class="method-description">
+
+ <p>
+Registers new fact sources into the plugin manager
+</p>
+
+
+
+ <div class="method-source-code"
+ id="inherited-source">
+<pre>
+ <span class="ruby-comment cmt"># File lib/mcollective/facts/base.rb, line 17</span>
+17: <span class="ruby-keyword kw">def</span> <span class="ruby-keyword kw">self</span>.<span class="ruby-identifier">inherited</span>(<span class="ruby-identifier">klass</span>)
+18: <span class="ruby-constant">PluginManager</span> <span class="ruby-operator"><<</span> {<span class="ruby-identifier">:type</span> =<span class="ruby-operator">></span> <span class="ruby-value str">"facts_plugin"</span>, <span class="ruby-identifier">:class</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">klass</span>.<span class="ruby-identifier">to_s</span>}
+19: <span class="ruby-keyword kw">end</span></pre>
+ </div>
+
+ </div>
+
+
+ </div>
+
+
+ <div id="new-method" class="method-detail ">
+ <a name="M000259"></a>
+
+ <div class="method-heading">
+
+ <span class="method-name">new</span><span
+ class="method-args">()</span>
+ <span class="method-click-advice">click to toggle source</span>
+
+ </div>
+
+ <div class="method-description">
+
+ <p class="missing-docs">(Not documented)</p>
+
+
+
+ <div class="method-source-code"
+ id="new-source">
+<pre>
+ <span class="ruby-comment cmt"># File lib/mcollective/facts/base.rb, line 10</span>
+10: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>
+11: <span class="ruby-ivar">@facts</span> = {}
+12: <span class="ruby-ivar">@last_good_facts</span> = {}
+13: <span class="ruby-ivar">@last_facts_load</span> = <span class="ruby-value">0</span>
+14: <span class="ruby-keyword kw">end</span></pre>
+ </div>
+
+ </div>
+
+
+ </div>
+
+
+ </div>
+
+ <div id="public-instance-method-details" class="method-section section">
+ <h3 class="section-header">Public Instance Methods</h3>
+
+
+ <div id="force-reload--method" class="method-detail ">
+ <a name="M000265"></a>
+
+ <div class="method-heading">
+
+ <span class="method-name">force_reload?</span><span
+ class="method-args">()</span>
+ <span class="method-click-advice">click to toggle source</span>
+
+ </div>
+
+ <div class="method-description">
+
+ <p>
+Plugins can override this to provide forced fact invalidation
+</p>
+
+
+
+ <div class="method-source-code"
+ id="force-reload--source">
+<pre>
+ <span class="ruby-comment cmt"># File lib/mcollective/facts/base.rb, line 81</span>
+81: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">force_reload?</span>
+82: <span class="ruby-keyword kw">false</span>
+83: <span class="ruby-keyword kw">end</span></pre>
+ </div>
+
+ </div>
+
+
+ </div>
+
+
+ <div id="get-fact-method" class="method-detail ">
+ <a name="M000261"></a>
+
+ <div class="method-heading">
+
+ <span class="method-name">get_fact</span><span
+ class="method-args">(fact=nil)</span>
+ <span class="method-click-advice">click to toggle source</span>
+
+ </div>
+
+ <div class="method-description">
+
+ <p>
+Returns the value of a single fact
+</p>
+
+
+
+ <div class="method-source-code"
+ id="get-fact-source">
+<pre>
+ <span class="ruby-comment cmt"># File lib/mcollective/facts/base.rb, line 22</span>
+22: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">get_fact</span>(<span class="ruby-identifier">fact</span>=<span class="ruby-keyword kw">nil</span>)
+23: <span class="ruby-identifier">config</span> = <span class="ruby-constant">Config</span>.<span class="ruby-identifier">instance</span>
+24:
+25: <span class="ruby-identifier">cache_time</span> = <span class="ruby-identifier">config</span>.<span class="ruby-identifier">fact_cache_time</span> <span class="ruby-operator">||</span> <span class="ruby-value">300</span>
+26:
+27: <span class="ruby-constant">Thread</span>.<span class="ruby-identifier">exclusive</span> <span class="ruby-keyword kw">do</span>
+28: <span class="ruby-keyword kw">begin</span>
+29: <span class="ruby-keyword kw">if</span> (<span class="ruby-constant">Time</span>.<span class="ruby-identifier">now</span>.<span class="ruby-identifier">to_i</span> <span class="ruby-operator">-</span> <span class="ruby-ivar">@last_facts_load</span> <span class="ruby-operator">></span> <span class="ruby-identifier">cache_time</span>.<span class="ruby-identifier">to_i</span> ) <span class="ruby-operator">||</span> <span class="ruby-identifier">force_reload?</span>
+30: <span class="ruby-constant">Log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"Resetting facter cache, now: #{Time.now.to_i} last-known-good: #{@last_facts_load}"</span>)
+31:
+32: <span class="ruby-identifier">tfacts</span> = <span class="ruby-identifier">load_facts_from_source</span>
+33:
+34: <span class="ruby-comment cmt"># Force reset to last known good state on empty facts</span>
+35: <span class="ruby-identifier">raise</span> <span class="ruby-value str">"Got empty facts"</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">tfacts</span>.<span class="ruby-identifier">empty?</span>
+36:
+37: <span class="ruby-ivar">@facts</span>.<span class="ruby-identifier">clear</span>
+38:
+39: <span class="ruby-identifier">tfacts</span>.<span class="ruby-identifier">each_pair</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">key</span>,<span class="ruby-identifier">value</span><span class="ruby-operator">|</span>
+40: <span class="ruby-ivar">@facts</span>[<span class="ruby-identifier">key</span>.<span class="ruby-identifier">to_s</span>] = <span class="ruby-identifier">value</span>.<span class="ruby-identifier">to_s</span>
+41: <span class="ruby-keyword kw">end</span>
+42:
+43: <span class="ruby-ivar">@last_good_facts</span> = <span class="ruby-ivar">@facts</span>.<span class="ruby-identifier">clone</span>
+44: <span class="ruby-ivar">@last_facts_load</span> = <span class="ruby-constant">Time</span>.<span class="ruby-identifier">now</span>.<span class="ruby-identifier">to_i</span>
+45: <span class="ruby-keyword kw">else</span>
+46: <span class="ruby-constant">Log</span>.<span class="ruby-identifier">debug</span>(<span class="ruby-node">"Using cached facts now: #{Time.now.to_i} last-known-good: #{@last_facts_load}"</span>)
+47: <span class="ruby-keyword kw">end</span>
+48: <span class="ruby-keyword kw">rescue</span> <span class="ruby-constant">Exception</span> =<span class="ruby-operator">></span> <span class="ruby-identifier">e</span>
+49: <span class="ruby-constant">Log</span>.<span class="ruby-identifier">error</span>(<span class="ruby-node">"Failed to load facts: #{e.class}: #{e}"</span>)
+50:
+51: <span class="ruby-comment cmt"># Avoid loops where failing fact loads cause huge CPU</span>
+52: <span class="ruby-comment cmt"># loops, this way it only retries once every cache_time</span>
+53: <span class="ruby-comment cmt"># seconds</span>
+54: <span class="ruby-ivar">@last_facts_load</span> = <span class="ruby-constant">Time</span>.<span class="ruby-identifier">now</span>.<span class="ruby-identifier">to_i</span>
+55:
+56: <span class="ruby-comment cmt"># Revert to last known good state</span>
+57: <span class="ruby-ivar">@facts</span> = <span class="ruby-ivar">@last_good_facts</span>.<span class="ruby-identifier">clone</span>
+58: <span class="ruby-keyword kw">end</span>
+59: <span class="ruby-keyword kw">end</span>
+60:
+61:
+62: <span class="ruby-comment cmt"># If you do not supply a specific fact all facts will be returned</span>
+63: <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">fact</span>.<span class="ruby-identifier">nil?</span>
+64: <span class="ruby-keyword kw">return</span> <span class="ruby-ivar">@facts</span>
+65: <span class="ruby-keyword kw">else</span>
+66: <span class="ruby-ivar">@facts</span>.<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">fact</span>) <span class="ruby-operator">?</span> <span class="ruby-ivar">@facts</span>[<span class="ruby-identifier">fact</span>] <span class="ruby-operator">:</span> <span class="ruby-keyword kw">nil</span>
+67: <span class="ruby-keyword kw">end</span>
+68: <span class="ruby-keyword kw">end</span></pre>
+ </div>
+
+ </div>
+
+
+ </div>
+
+
+ <div id="get-facts-method" class="method-detail ">
+ <a name="M000263"></a>
+
+ <div class="method-heading">
+
+ <span class="method-name">get_facts</span><span
+ class="method-args">()</span>
+ <span class="method-click-advice">click to toggle source</span>
+
+ </div>
+
+ <div class="method-description">
+
+ <p>
+Returns all facts
+</p>
+
+
+
+ <div class="method-source-code"
+ id="get-facts-source">
+<pre>
+ <span class="ruby-comment cmt"># File lib/mcollective/facts/base.rb, line 71</span>
+71: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">get_facts</span>
+72: <span class="ruby-identifier">get_fact</span>(<span class="ruby-keyword kw">nil</span>)
+73: <span class="ruby-keyword kw">end</span></pre>
+ </div>
+
+ </div>
+
+
+ </div>
+
+
+ <div id="has-fact--method" class="method-detail ">
+ <a name="M000264"></a>
+
+ <div class="method-heading">
+
+ <span class="method-name">has_fact?</span><span
+ class="method-args">(fact)</span>
+ <span class="method-click-advice">click to toggle source</span>
+
+ </div>
+
+ <div class="method-description">
+
+ <p>
+Returns true if we know about a specific fact, false otherwise
+</p>
+
+
+
+ <div class="method-source-code"
+ id="has-fact--source">
+<pre>
+ <span class="ruby-comment cmt"># File lib/mcollective/facts/base.rb, line 76</span>
+76: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">has_fact?</span>(<span class="ruby-identifier">fact</span>)
+77: <span class="ruby-identifier">get_fact</span>(<span class="ruby-keyword kw">nil</span>).<span class="ruby-identifier">include?</span>(<span class="ruby-identifier">fact</span>)
+78: <span class="ruby-keyword kw">end</span></pre>
+ </div>
+
+ </div>
+
+
+ </div>
+
+
+ </div>
+
+
+ </div>
+
+
+ <div id="rdoc-debugging-section-dump" class="debugging-section">
+
+ <p>Disabled; run with --debug to generate this.</p>
+
+ </div>
+
+ <div id="validator-badges">
+ <p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p>
+ <p><small>Generated with the <a href="http://deveiate.org/projects/Darkfish-Rdoc/">Darkfish
+ Rdoc Generator</a> 1.1.6</small>.</p>
+ </div>
+
+</body>
+</html>
+
Code Review / packages / precise / mcollective.git / blobdiff