<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Class: SdbmStore</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <meta http-equiv="Content-Script-Type" content="text/javascript" /> <link rel="stylesheet" href=".././rdoc-style.css" type="text/css" media="screen" /> <script type="text/javascript"> // <![CDATA[ function popupCode( url ) { window.open(url, "Code", "resizable=yes,scrollbars=yes,toolbar=no,status=no,height=150,width=400") } function toggleCode( id ) { if ( document.getElementById ) elem = document.getElementById( id ); else if ( document.all ) elem = eval( "document.all." + id ); else return false; elemStyle = elem.style; if ( elemStyle.display != "block" ) { elemStyle.display = "block" } else { elemStyle.display = "none" } return true; } // Make codeblocks hidden by default document.writeln( "<style type=\"text/css\">div.method-source-code { display: none }</style>" ) // ]]> </script> </head> <body> <div id="classHeader"> <table class="header-table"> <tr class="top-aligned-row"> <td><strong>Class</strong></td> <td class="class-name-in-header">SdbmStore</td> </tr> <tr class="top-aligned-row"> <td><strong>In:</strong></td> <td> <a href="../files/lib/storage/sdbmstore_rb.html"> lib/storage/sdbmstore.rb </a> <br /> </td> </tr> <tr class="top-aligned-row"> <td><strong>Parent:</strong></td> <td> <a href="Store.html"> Store </a> </td> </tr> </table> </div> <!-- banner header --> <div id="bodyContent"> <div id="contextContent"> <div id="diagram"> <map id="map" name="map"> <area shape="rect" coords="5,101,93,149" href="SdbmStore.html" alt="SdbmStore " /> <area shape="rect" coords="13,5,85,53" href="Store.html" alt="Store " /> </map> <img src="../dot/f_46.png" usemap="#map" border="0" alt="dot/f_46.png"> </div> <div id="description"> <p> The <a href="SdbmStore.html">SdbmStore</a> class manages access to all object storage. </p> <dl> <dt><tt>db</tt></dt><dd>is a handle to the database. </dd> <dt><tt>dbtop</tt></dt><dd>stores the highest id used in the database. </dd> <dt><tt>cache</tt></dt><dd>is a handle to the cache </dd> </dl> </div> </div> <div id="method-list"> <h3 class="section-bar">Methods</h3> <div class="name-list"> <a href="#M000274">check</a> <a href="#M000269">close</a> <a href="#M000272">delete</a> <a href="#M000278">each</a> <a href="#M000273">get</a> <a href="#M000270">inspect</a> <a href="#M000276">makenoswap</a> <a href="#M000277">makeswap</a> <a href="#M000275">mark</a> <a href="#M000267">new</a> <a href="#M000271">put</a> <a href="#M000268">save</a> <a href="#M000279">stats</a> </div> </div> </div> <!-- if includes --> <div id="section"> <!-- if method_list --> <div id="methods"> <h3 class="section-bar">Public Class methods</h3> <div id="method-M000267" class="method-detail"> <a name="M000267"></a> <div class="method-heading"> <a href="#M000267" class="method-signature"> <span class="method-name">new</span><span class="method-args">(dbfile)</span> </a> </div> <div class="method-description"> <p><a class="source-toggle" href="#" onclick="toggleCode('M000267-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000267-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 29</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>(<span class="ruby-identifier">dbfile</span>) <span class="ruby-keyword kw">super</span>() <span class="ruby-ivar">@dbfile</span> = <span class="ruby-node">"#{dbfile}"</span> <span class="ruby-comment cmt"># check if database exists and build it if not</span> <span class="ruby-identifier">build_database</span> <span class="ruby-identifier">log</span>.<span class="ruby-identifier">info</span> <span class="ruby-value str">"Loading world..."</span> <span class="ruby-comment cmt"># open database and sets @dbtop to highest object id</span> <span class="ruby-ivar">@db</span> = <span class="ruby-constant">SDBM</span>.<span class="ruby-identifier">open</span>(<span class="ruby-ivar">@dbfile</span>, <span class="ruby-value">0666</span>) <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">each_key</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">o</span><span class="ruby-operator">|</span> <span class="ruby-ivar">@dbtop</span> = <span class="ruby-identifier">o</span>.<span class="ruby-identifier">to_i</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">o</span>.<span class="ruby-identifier">to_i</span> <span class="ruby-operator">></span> <span class="ruby-ivar">@dbtop</span> <span class="ruby-keyword kw">end</span> <span class="ruby-ivar">@cache</span> = <span class="ruby-constant">CacheManager</span>.<span class="ruby-identifier">new</span>(<span class="ruby-ivar">@db</span>) <span class="ruby-identifier">log</span>.<span class="ruby-identifier">info</span> <span class="ruby-node">"Database '#{@dbfile}' loaded...highest id = #{@dbtop}."</span> <span class="ruby-comment cmt"># log.debug @db.inspect</span> <span class="ruby-keyword kw">rescue</span> <span class="ruby-identifier">log</span>.<span class="ruby-identifier">fatal</span> <span class="ruby-identifier">$!</span> <span class="ruby-identifier">raise</span> <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <h3 class="section-bar">Public Instance methods</h3> <div id="method-M000274" class="method-detail"> <a name="M000274"></a> <div class="method-heading"> <a href="#M000274" class="method-signature"> <span class="method-name">check</span><span class="method-args">(oid)</span> </a> </div> <div class="method-description"> <p> Check if an object is in the database by its id. </p> <dl> <dt><tt>oid</tt></dt><dd>is the id to use in the search. </dd> <dt><tt>return</tt></dt><dd>true or false </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000274-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000274-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 94</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">check</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">has_key?</span> <span class="ruby-identifier">oid</span>.<span class="ruby-identifier">to_s</span> <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000269" class="method-detail"> <a name="M000269"></a> <div class="method-heading"> <a href="#M000269" class="method-signature"> <span class="method-name">close</span><span class="method-args">()</span> </a> </div> <div class="method-description"> <p> Close the database </p> <dl> <dt><tt>return</tt></dt><dd>Undefined. </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000269-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000269-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 59</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">close</span> <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">close</span> <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000272" class="method-detail"> <a name="M000272"></a> <div class="method-heading"> <a href="#M000272" class="method-signature"> <span class="method-name">delete</span><span class="method-args">(oid)</span> </a> </div> <div class="method-description"> <p> Deletes an object from the database. </p> <dl> <dt><tt>oid</tt></dt><dd>is the id to to be deleted. </dd> <dt><tt>return</tt></dt><dd>Undefined. </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000272-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000272-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 80</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">delete</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">delete</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000278" class="method-detail"> <a name="M000278"></a> <div class="method-heading"> <a href="#M000278" class="method-signature"> <span class="method-name">each</span><span class="method-args">() {|@cache.get(k)}| ...}</span> </a> </div> <div class="method-description"> <p> Iterate through all objects This needs to have all the possible keys first. So we need to fetch them from the cache and from the database and and produce a list of unique keys. </p> <dl> <dt><tt>yield</tt></dt><dd>Each object in database to block of caller. </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000278-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000278-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 124</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">each</span> <span class="ruby-identifier">kys</span> = <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">keys</span> <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">each_key</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">k</span><span class="ruby-operator">|</span> <span class="ruby-identifier">kys</span> <span class="ruby-operator"><<</span> <span class="ruby-identifier">k</span>.<span class="ruby-identifier">to_i</span>} <span class="ruby-identifier">kys</span>.<span class="ruby-identifier">uniq!</span> <span class="ruby-identifier">kys</span>.<span class="ruby-identifier">each</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">k</span><span class="ruby-operator">|</span> <span class="ruby-keyword kw">yield</span> <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">get</span>(<span class="ruby-identifier">k</span>)} <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000273" class="method-detail"> <a name="M000273"></a> <div class="method-heading"> <a href="#M000273" class="method-signature"> <span class="method-name">get</span><span class="method-args">(oid)</span> </a> </div> <div class="method-description"> <p> Finds an object in the database by its id. </p> <dl> <dt><tt>oid</tt></dt><dd>is the id to use in the search. </dd> <dt><tt>return</tt></dt><dd>Handle to the object or nil. </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000273-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000273-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 87</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">get</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">get</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000270" class="method-detail"> <a name="M000270"></a> <div class="method-heading"> <a href="#M000270" class="method-signature"> <span class="method-name">inspect</span><span class="method-args">()</span> </a> </div> <div class="method-description"> <p> <a href="SdbmStore.html#M000270">inspect</a> the store cache (only for caches) </p> <dl> <dt><tt>return</tt></dt><dd>string </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000270-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000270-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 65</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">inspect</span> <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">inspect</span> <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000276" class="method-detail"> <a name="M000276"></a> <div class="method-heading"> <a href="#M000276" class="method-signature"> <span class="method-name">makenoswap</span><span class="method-args">(oid)</span> </a> </div> <div class="method-description"> <p> Marks an object nonswappable </p> <dl> <dt><tt>oid</tt></dt><dd>is the object id </dd> <dt><tt>return</tt></dt><dd>undefined </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000276-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000276-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 108</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">makenoswap</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">makenoswap</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000277" class="method-detail"> <a name="M000277"></a> <div class="method-heading"> <a href="#M000277" class="method-signature"> <span class="method-name">makeswap</span><span class="method-args">(oid)</span> </a> </div> <div class="method-description"> <p> Marks an object swappable </p> <dl> <dt><tt>oid</tt></dt><dd>is the object id </dd> <dt><tt>return</tt></dt><dd>undefined </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000277-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000277-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 115</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">makeswap</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">makeswap</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000275" class="method-detail"> <a name="M000275"></a> <div class="method-heading"> <a href="#M000275" class="method-signature"> <span class="method-name">mark</span><span class="method-args">(oid)</span> </a> </div> <div class="method-description"> <p> Marks an object dirty </p> <dl> <dt><tt>oid</tt></dt><dd>is the id to use in the search. </dd> <dt><tt>return</tt></dt><dd>undefined </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000275-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000275-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 101</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">mark</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">mark</span>(<span class="ruby-identifier">oid</span>) <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000271" class="method-detail"> <a name="M000271"></a> <div class="method-heading"> <a href="#M000271" class="method-signature"> <span class="method-name">put</span><span class="method-args">(obj)</span> </a> </div> <div class="method-description"> <p> Adds a <a href="SdbmStore.html#M000267">new</a> object to the database. </p> <dl> <dt><tt>obj</tt></dt><dd>is a reference to object to be added </dd> <dt><tt>return</tt></dt><dd>Undefined. </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000271-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000271-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 72</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">put</span>(<span class="ruby-identifier">obj</span>) <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">put</span>(<span class="ruby-identifier">obj</span>) <span class="ruby-identifier">obj</span> <span class="ruby-comment cmt"># return really should not be checked</span> <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000268" class="method-detail"> <a name="M000268"></a> <div class="method-heading"> <a href="#M000268" class="method-signature"> <span class="method-name">save</span><span class="method-args">()</span> </a> </div> <div class="method-description"> <p> Save the world </p> <dl> <dt><tt>return</tt></dt><dd>Undefined. </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000268-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000268-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 53</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">save</span> <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">sync</span> <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> <div id="method-M000279" class="method-detail"> <a name="M000279"></a> <div class="method-heading"> <a href="#M000279" class="method-signature"> <span class="method-name">stats</span><span class="method-args">()</span> </a> </div> <div class="method-description"> <p> produces a statistical report of the database </p> <dl> <dt><tt>return</tt></dt><dd>a string containing the report </dd> </dl> <p><a class="source-toggle" href="#" onclick="toggleCode('M000279-source');return false;">[Source]</a></p> <div class="method-source-code" id="M000279-source"> <pre> <span class="ruby-comment cmt"># File lib/storage/sdbmstore.rb, line 133</span> <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">stats</span> <span class="ruby-identifier">stats</span> = <span class="ruby-keyword kw">super</span> <span class="ruby-identifier">stats</span> <span class="ruby-operator"><<</span> <span class="ruby-ivar">@cache</span>.<span class="ruby-identifier">stats</span> <span class="ruby-keyword kw">end</span> </pre> </div> </div> </div> </div> </div> <div id="validator-badges"> <p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p> </div> </body> </html>