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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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+  <title>oauth2client.appengine.StorageByKeyName</title>
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+      alink="#204080">
+<!-- ==================== NAVIGATION BAR ==================== -->
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+<table width="100%" cellpadding="0" cellspacing="0">
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+      <span class="breadcrumbs">
+        <a href="oauth2client-module.html">Package&nbsp;oauth2client</a> ::
+        <a href="oauth2client.appengine-module.html">Module&nbsp;appengine</a> ::
+        Class&nbsp;StorageByKeyName
+      </span>
+    </td>
+    <td>
+      <table cellpadding="0" cellspacing="0">
+        <!-- hide/show private -->
+        <tr><td align="right"><span class="options">[<a href="javascript:void(0);" class="privatelink"
+    onclick="toggle_private();">hide&nbsp;private</a>]</span></td></tr>
+        <tr><td align="right"><span class="options"
+            >[<a href="frames.html" target="_top">frames</a
+            >]&nbsp;|&nbsp;<a href="oauth2client.appengine.StorageByKeyName-class.html"
+            target="_top">no&nbsp;frames</a>]</span></td></tr>
+      </table>
+    </td>
+  </tr>
+</table>
+<!-- ==================== CLASS DESCRIPTION ==================== -->
+<h1 class="epydoc">Class StorageByKeyName</h1><p class="nomargin-top"><span class="codelink"><a href="oauth2client.appengine-pysrc.html#StorageByKeyName">source&nbsp;code</a></span></p>
+<center>
+<center>  <map id="uml_class_diagram_for_oauth2cl_9" name="uml_class_diagram_for_oauth2cl_9">
+<area shape="rect" href="oauth2client.appengine.StorageByKeyName-class.html#__init__" title="Constructor for Storage." alt="" coords="17,185,383,204"/>
+<area shape="rect" href="oauth2client.appengine.StorageByKeyName-class.html#locked_get" title="Retrieve Credential from datastore." alt="" coords="17,204,383,223"/>
+<area shape="rect" href="oauth2client.appengine.StorageByKeyName-class.html#locked_put" title="Write a Credentials to the datastore." alt="" coords="17,223,383,241"/>
+<area shape="rect" href="oauth2client.appengine.StorageByKeyName-class.html#locked_delete" title="Delete Credential from datastore." alt="" coords="17,241,383,260"/>
+<area shape="rect" href="oauth2client.appengine.StorageByKeyName-class.html" title="Store and retrieve a single credential to and from the App Engine datastore." alt="" coords="16,160,384,261"/>
+<area shape="rect" href="oauth2client.client.Storage-class.html#acquire_lock" title="Acquires any lock necessary to access this Storage." alt="" coords="139,36,261,55"/>
+<area shape="rect" href="oauth2client.client.Storage-class.html#release_lock" title="Release the Storage lock." alt="" coords="139,55,261,73"/>
+<area shape="rect" href="oauth2client.client.Storage-class.html#get" title="Retrieve credential." alt="" coords="139,73,261,92"/>
+<area shape="rect" href="oauth2client.client.Storage-class.html#put" title="Write a credential." alt="" coords="139,92,261,111"/>
+<area shape="rect" href="oauth2client.client.Storage-class.html#delete" title="Delete credential." alt="" coords="139,111,261,129"/>
+<area shape="rect" href="oauth2client.client.Storage-class.html" title="Base class for all Storage objects." alt="" coords="137,11,263,131"/>
+</map>
+  <img src="uml_class_diagram_for_oauth2cl_9.gif" alt='' usemap="#uml_class_diagram_for_oauth2cl_9" ismap="ismap" class="graph-without-title" />
+</center>
+</center>
+<hr />
+<pre class="literalblock">
+Store and retrieve a single credential to and from
+the App Engine datastore.
+
+This Storage helper presumes the Credentials
+have been stored as a CredenialsProperty
+on a datastore model class, and that entities
+are stored by key_name.
+
+</pre>
+
+<!-- ==================== INSTANCE METHODS ==================== -->
+<a name="section-InstanceMethods"></a>
+<table class="summary" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr bgcolor="#70b0f0" class="table-header">
+  <td colspan="2" class="table-header">
+    <table border="0" cellpadding="0" cellspacing="0" width="100%">
+      <tr valign="top">
+        <td align="left"><span class="table-header">Instance Methods</span></td>
+        <td align="right" valign="top"
+         ><span class="options">[<a href="#section-InstanceMethods"
+         class="privatelink" onclick="toggle_private();"
+         >hide private</a>]</span></td>
+      </tr>
+    </table>
+  </td>
+</tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a href="oauth2client.appengine.StorageByKeyName-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
+        <span class="summary-sig-arg">model</span>,
+        <span class="summary-sig-arg">key_name</span>,
+        <span class="summary-sig-arg">property_name</span>,
+        <span class="summary-sig-arg">cache</span>=<span class="summary-sig-default">None</span>)</span><br />
+      Constructor for Storage.</td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="oauth2client.appengine-pysrc.html#StorageByKeyName.__init__">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a href="oauth2client.appengine.StorageByKeyName-class.html#locked_get" class="summary-sig-name">locked_get</a>(<span class="summary-sig-arg">self</span>)</span><br />
+      Retrieve Credential from datastore.</td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="oauth2client.appengine-pysrc.html#StorageByKeyName.locked_get">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a href="oauth2client.appengine.StorageByKeyName-class.html#locked_put" class="summary-sig-name">locked_put</a>(<span class="summary-sig-arg">self</span>,
+        <span class="summary-sig-arg">credentials</span>)</span><br />
+      Write a Credentials to the datastore.</td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="oauth2client.appengine-pysrc.html#StorageByKeyName.locked_put">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+<tr>
+    <td width="15%" align="right" valign="top" class="summary">
+      <span class="summary-type">&nbsp;</span>
+    </td><td class="summary">
+      <table width="100%" cellpadding="0" cellspacing="0" border="0">
+        <tr>
+          <td><span class="summary-sig"><a href="oauth2client.appengine.StorageByKeyName-class.html#locked_delete" class="summary-sig-name">locked_delete</a>(<span class="summary-sig-arg">self</span>)</span><br />
+      Delete Credential from datastore.</td>
+          <td align="right" valign="top">
+            <span class="codelink"><a href="oauth2client.appengine-pysrc.html#StorageByKeyName.locked_delete">source&nbsp;code</a></span>
+            
+          </td>
+        </tr>
+      </table>
+      
+    </td>
+  </tr>
+  <tr>
+    <td colspan="2" class="summary">
+    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="oauth2client.client.Storage-class.html">client.Storage</a></code></b>:
+      <code><a href="oauth2client.client.Storage-class.html#acquire_lock">acquire_lock</a></code>,
+      <code><a href="oauth2client.client.Storage-class.html#delete">delete</a></code>,
+      <code><a href="oauth2client.client.Storage-class.html#get">get</a></code>,
+      <code><a href="oauth2client.client.Storage-class.html#put">put</a></code>,
+      <code><a href="oauth2client.client.Storage-class.html#release_lock">release_lock</a></code>
+      </p>
+    <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
+      <code>__delattr__</code>,
+      <code>__format__</code>,
+      <code>__getattribute__</code>,
+      <code>__hash__</code>,
+      <code>__new__</code>,
+      <code>__reduce__</code>,
+      <code>__reduce_ex__</code>,
+      <code>__repr__</code>,
+      <code>__setattr__</code>,
+      <code>__sizeof__</code>,
+      <code>__str__</code>,
+      <code>__subclasshook__</code>
+      </p>
+    </td>
+  </tr>
+</table>
+<!-- ==================== PROPERTIES ==================== -->
+<a name="section-Properties"></a>
+<table class="summary" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr bgcolor="#70b0f0" class="table-header">
+  <td colspan="2" class="table-header">
+    <table border="0" cellpadding="0" cellspacing="0" width="100%">
+      <tr valign="top">
+        <td align="left"><span class="table-header">Properties</span></td>
+        <td align="right" valign="top"
+         ><span class="options">[<a href="#section-Properties"
+         class="privatelink" onclick="toggle_private();"
+         >hide private</a>]</span></td>
+      </tr>
+    </table>
+  </td>
+</tr>
+  <tr>
+    <td colspan="2" class="summary">
+    <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
+      <code>__class__</code>
+      </p>
+    </td>
+  </tr>
+</table>
+<!-- ==================== METHOD DETAILS ==================== -->
+<a name="section-MethodDetails"></a>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr bgcolor="#70b0f0" class="table-header">
+  <td colspan="2" class="table-header">
+    <table border="0" cellpadding="0" cellspacing="0" width="100%">
+      <tr valign="top">
+        <td align="left"><span class="table-header">Method Details</span></td>
+        <td align="right" valign="top"
+         ><span class="options">[<a href="#section-MethodDetails"
+         class="privatelink" onclick="toggle_private();"
+         >hide private</a>]</span></td>
+      </tr>
+    </table>
+  </td>
+</tr>
+</table>
+<a name="__init__"></a>
+<div>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <table width="100%" cellpadding="0" cellspacing="0" border="0">
+  <tr valign="top"><td>
+  <h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
+        <span class="sig-arg">model</span>,
+        <span class="sig-arg">key_name</span>,
+        <span class="sig-arg">property_name</span>,
+        <span class="sig-arg">cache</span>=<span class="sig-default">None</span>)</span>
+    <br /><em class="fname">(Constructor)</em>
+  </h3>
+  </td><td align="right" valign="top"
+    ><span class="codelink"><a href="oauth2client.appengine-pysrc.html#StorageByKeyName.__init__">source&nbsp;code</a></span>&nbsp;
+    </td>
+  </tr></table>
+  
+  <pre class="literalblock">
+Constructor for Storage.
+
+Args:
+  model: db.Model, model class
+  key_name: string, key name for the entity that has the credentials
+  property_name: string, name of the property that is a CredentialsProperty
+  cache: memcache, a write-through cache to put in front of the datastore
+
+</pre>
+  <dl class="fields">
+    <dt>Overrides:
+        object.__init__
+    </dt>
+  </dl>
+</td></tr></table>
+</div>
+<a name="locked_get"></a>
+<div>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <table width="100%" cellpadding="0" cellspacing="0" border="0">
+  <tr valign="top"><td>
+  <h3 class="epydoc"><span class="sig"><span class="sig-name">locked_get</span>(<span class="sig-arg">self</span>)</span>
+  </h3>
+  </td><td align="right" valign="top"
+    ><span class="codelink"><a href="oauth2client.appengine-pysrc.html#StorageByKeyName.locked_get">source&nbsp;code</a></span>&nbsp;
+    </td>
+  </tr></table>
+  
+  <pre class="literalblock">
+Retrieve Credential from datastore.
+
+Returns:
+  oauth2client.Credentials
+
+</pre>
+  <dl class="fields">
+    <dt>Overrides:
+        <a href="oauth2client.client.Storage-class.html#locked_get">client.Storage.locked_get</a>
+    </dt>
+  </dl>
+</td></tr></table>
+</div>
+<a name="locked_put"></a>
+<div>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <table width="100%" cellpadding="0" cellspacing="0" border="0">
+  <tr valign="top"><td>
+  <h3 class="epydoc"><span class="sig"><span class="sig-name">locked_put</span>(<span class="sig-arg">self</span>,
+        <span class="sig-arg">credentials</span>)</span>
+  </h3>
+  </td><td align="right" valign="top"
+    ><span class="codelink"><a href="oauth2client.appengine-pysrc.html#StorageByKeyName.locked_put">source&nbsp;code</a></span>&nbsp;
+    </td>
+  </tr></table>
+  
+  <pre class="literalblock">
+Write a Credentials to the datastore.
+
+Args:
+  credentials: Credentials, the credentials to store.
+
+</pre>
+  <dl class="fields">
+    <dt>Overrides:
+        <a href="oauth2client.client.Storage-class.html#locked_put">client.Storage.locked_put</a>
+    </dt>
+  </dl>
+</td></tr></table>
+</div>
+<a name="locked_delete"></a>
+<div>
+<table class="details" border="1" cellpadding="3"
+       cellspacing="0" width="100%" bgcolor="white">
+<tr><td>
+  <table width="100%" cellpadding="0" cellspacing="0" border="0">
+  <tr valign="top"><td>
+  <h3 class="epydoc"><span class="sig"><span class="sig-name">locked_delete</span>(<span class="sig-arg">self</span>)</span>
+  </h3>
+  </td><td align="right" valign="top"
+    ><span class="codelink"><a href="oauth2client.appengine-pysrc.html#StorageByKeyName.locked_delete">source&nbsp;code</a></span>&nbsp;
+    </td>
+  </tr></table>
+  
+  <pre class="literalblock">
+Delete Credential from datastore.
+
+</pre>
+  <dl class="fields">
+    <dt>Overrides:
+        <a href="oauth2client.client.Storage-class.html#locked_delete">client.Storage.locked_delete</a>
+    </dt>
+  </dl>
+</td></tr></table>
+</div>
+<br />
+<!-- ==================== NAVIGATION BAR ==================== -->
+<table class="navbar" border="0" width="100%" cellpadding="0"
+       bgcolor="#a0c0ff" cellspacing="0">
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+
+  <!-- Tree link -->
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+
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+
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