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<title>Class: SdbmStore</title>
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<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="33,113,116,161" href="SdbmStore.html" alt="SdbmStore
">
<area shape="RECT" coords="39,17,111,65" href="Store.html" alt="Store
">
</map>
<img src="../dot/f_45.png" usemap="#map" border=0 alt="TopLevel">
</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="#M000268">check</a>
<a href="#M000263">close</a>
<a href="#M000266">delete</a>
<a href="#M000272">each</a>
<a href="#M000267">get</a>
<a href="#M000264">inspect</a>
<a href="#M000270">makenoswap</a>
<a href="#M000271">makeswap</a>
<a href="#M000269">mark</a>
<a href="#M000261">new</a>
<a href="#M000265">put</a>
<a href="#M000262">save</a>
<a href="#M000273">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-M000261" class="method-detail">
<a name="M000261"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000261.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000261.html');return false;">
<span class="method-name">new</span><span class="method-args">(dbfile)</span>
</a>
</div>
<div class="method-description">
</div>
</div>
<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000268" class="method-detail">
<a name="M000268"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000268.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000268.html');return false;">
<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>
</div>
</div>
<div id="method-M000263" class="method-detail">
<a name="M000263"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000263.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000263.html');return false;">
<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>
</div>
</div>
<div id="method-M000266" class="method-detail">
<a name="M000266"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000266.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000266.html');return false;">
<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>
</div>
</div>
<div id="method-M000272" class="method-detail">
<a name="M000272"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000272.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000272.html');return false;">
<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>
</div>
</div>
<div id="method-M000267" class="method-detail">
<a name="M000267"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000267.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000267.html');return false;">
<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>
</div>
</div>
<div id="method-M000264" class="method-detail">
<a name="M000264"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000264.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000264.html');return false;">
<span class="method-name">inspect</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p>
inspect the store cache (only for caches)
</p>
<dl>
<dt><tt>return</tt></dt><dd>string
</dd>
</dl>
</div>
</div>
<div id="method-M000270" class="method-detail">
<a name="M000270"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000270.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000270.html');return false;">
<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>
</div>
</div>
<div id="method-M000271" class="method-detail">
<a name="M000271"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000271.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000271.html');return false;">
<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>
</div>
</div>
<div id="method-M000269" class="method-detail">
<a name="M000269"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000269.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000269.html');return false;">
<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>
</div>
</div>
<div id="method-M000265" class="method-detail">
<a name="M000265"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000265.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000265.html');return false;">
<span class="method-name">put</span><span class="method-args">(obj)</span>
</a>
</div>
<div class="method-description">
<p>
Adds a new 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>
</div>
</div>
<div id="method-M000262" class="method-detail">
<a name="M000262"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000262.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000262.html');return false;">
<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>
</div>
</div>
<div id="method-M000273" class="method-detail">
<a name="M000273"></a>
<div class="method-heading">
<a href="SdbmStore.src/M000273.html" target="Code" class="method-signature"
onclick="popupCode('SdbmStore.src/M000273.html');return false;">
<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>
</div>
</div>
</div>
</div>
<div id="validator-badges">
<p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p>
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