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385 lines
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<a href="oauth2client-module.html">Package oauth2client</a> ::
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<a href="oauth2client.locked_file-module.html">Module locked_file</a> ::
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Class LockedFile
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<!-- hide/show private -->
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<!-- ==================== CLASS DESCRIPTION ==================== -->
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<h1 class="epydoc">Class LockedFile</h1><p class="nomargin-top"><span class="codelink"><a href="oauth2client.locked_file-pysrc.html#LockedFile">source code</a></span></p>
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<center>
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<center> <map id="uml_class_diagram_for_oauth2cl_48" name="uml_class_diagram_for_oauth2cl_48">
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<area shape="rect" id="node1_6" href="oauth2client.locked_file.LockedFile-class.html#__init__" title="Construct a LockedFile." alt="" coords="18,36,446,55"/>
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<area shape="rect" id="node1_7" href="oauth2client.locked_file.LockedFile-class.html#filename" title="Return the filename we were constructed with." alt="" coords="18,55,446,73"/>
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<area shape="rect" id="node1_8" href="oauth2client.locked_file.LockedFile-class.html#file_handle" title="Return the file_handle to the opened file." alt="" coords="18,73,446,92"/>
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<area shape="rect" id="node1_9" href="oauth2client.locked_file.LockedFile-class.html#is_locked" title="Return whether we successfully locked the file." alt="" coords="18,92,446,111"/>
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<area shape="rect" id="node1_10" href="oauth2client.locked_file.LockedFile-class.html#open_and_lock" title="Open the file, trying to lock it." alt="" coords="18,111,446,129"/>
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<area shape="rect" id="node1_11" href="oauth2client.locked_file.LockedFile-class.html#unlock_and_close" title="Unlock and close a file." alt="" coords="18,129,446,148"/>
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<area shape="rect" id="node1" href="oauth2client.locked_file.LockedFile-class.html" title="Represent a file that has exclusive access." alt="" coords="5,5,457,155"/>
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</center>
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<hr />
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<pre class="literalblock">
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Represent a file that has exclusive access.
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</pre>
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<!-- ==================== INSTANCE METHODS ==================== -->
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<a name="section-InstanceMethods"></a>
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<span class="summary-type"> </span>
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</td><td class="summary">
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<table width="100%" cellpadding="0" cellspacing="0" border="0">
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<tr>
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<td><span class="summary-sig"><a href="oauth2client.locked_file.LockedFile-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
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<span class="summary-sig-arg">filename</span>,
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<span class="summary-sig-arg">mode</span>,
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<span class="summary-sig-arg">fallback_mode</span>,
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<span class="summary-sig-arg">use_native_locking</span>=<span class="summary-sig-default">True</span>)</span><br />
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Construct a LockedFile.</td>
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<td align="right" valign="top">
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<span class="codelink"><a href="oauth2client.locked_file-pysrc.html#LockedFile.__init__">source code</a></span>
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<span class="summary-type"> </span>
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</td><td class="summary">
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<td><span class="summary-sig"><a name="filename"></a><span class="summary-sig-name">filename</span>(<span class="summary-sig-arg">self</span>)</span><br />
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Return the filename we were constructed with.</td>
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<td align="right" valign="top">
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<span class="codelink"><a href="oauth2client.locked_file-pysrc.html#LockedFile.filename">source code</a></span>
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<span class="summary-type"> </span>
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</td><td class="summary">
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<tr>
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<td><span class="summary-sig"><a name="file_handle"></a><span class="summary-sig-name">file_handle</span>(<span class="summary-sig-arg">self</span>)</span><br />
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Return the file_handle to the opened file.</td>
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<td align="right" valign="top">
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<span class="codelink"><a href="oauth2client.locked_file-pysrc.html#LockedFile.file_handle">source code</a></span>
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</td>
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</td>
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<td width="15%" align="right" valign="top" class="summary">
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<span class="summary-type"> </span>
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</td><td class="summary">
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<table width="100%" cellpadding="0" cellspacing="0" border="0">
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<tr>
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<td><span class="summary-sig"><a name="is_locked"></a><span class="summary-sig-name">is_locked</span>(<span class="summary-sig-arg">self</span>)</span><br />
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Return whether we successfully locked the file.</td>
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<td align="right" valign="top">
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<span class="codelink"><a href="oauth2client.locked_file-pysrc.html#LockedFile.is_locked">source code</a></span>
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</td>
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<td width="15%" align="right" valign="top" class="summary">
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<span class="summary-type"> </span>
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</td><td class="summary">
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<table width="100%" cellpadding="0" cellspacing="0" border="0">
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<tr>
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<td><span class="summary-sig"><a href="oauth2client.locked_file.LockedFile-class.html#open_and_lock" class="summary-sig-name">open_and_lock</a>(<span class="summary-sig-arg">self</span>,
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<span class="summary-sig-arg">timeout</span>=<span class="summary-sig-default">0</span>,
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<span class="summary-sig-arg">delay</span>=<span class="summary-sig-default">0.05</span>)</span><br />
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Open the file, trying to lock it.</td>
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<td align="right" valign="top">
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<span class="codelink"><a href="oauth2client.locked_file-pysrc.html#LockedFile.open_and_lock">source code</a></span>
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</td>
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</table>
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</td>
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<tr>
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<td width="15%" align="right" valign="top" class="summary">
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<span class="summary-type"> </span>
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</td><td class="summary">
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<table width="100%" cellpadding="0" cellspacing="0" border="0">
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<tr>
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<td><span class="summary-sig"><a name="unlock_and_close"></a><span class="summary-sig-name">unlock_and_close</span>(<span class="summary-sig-arg">self</span>)</span><br />
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Unlock and close a file.</td>
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<td align="right" valign="top">
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<span class="codelink"><a href="oauth2client.locked_file-pysrc.html#LockedFile.unlock_and_close">source code</a></span>
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</td>
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</td>
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<tr>
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<td colspan="2" class="summary">
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<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
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<code>__delattr__</code>,
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<code>__format__</code>,
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<code>__getattribute__</code>,
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<code>__hash__</code>,
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<code>__new__</code>,
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<code>__reduce__</code>,
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<code>__reduce_ex__</code>,
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<code>__repr__</code>,
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<code>__setattr__</code>,
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<code>__sizeof__</code>,
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<code>__str__</code>,
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<code>__subclasshook__</code>
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</p>
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<!-- ==================== PROPERTIES ==================== -->
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<a name="section-Properties"></a>
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<td align="left"><span class="table-header">Properties</span></td>
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<td colspan="2" class="summary">
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<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
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<code>__class__</code>
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</p>
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<!-- ==================== METHOD DETAILS ==================== -->
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<a name="__init__"></a>
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<div>
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cellspacing="0" width="100%" bgcolor="white">
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<tr valign="top"><td>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
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<span class="sig-arg">filename</span>,
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<span class="sig-arg">mode</span>,
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<span class="sig-arg">fallback_mode</span>,
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<span class="sig-arg">use_native_locking</span>=<span class="sig-default">True</span>)</span>
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<br /><em class="fname">(Constructor)</em>
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</h3>
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</td><td align="right" valign="top"
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><span class="codelink"><a href="oauth2client.locked_file-pysrc.html#LockedFile.__init__">source code</a></span>
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</td>
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</tr></table>
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<pre class="literalblock">
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Construct a LockedFile.
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Args:
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filename: string, The path of the file to open.
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mode: string, The mode to try to open the file with.
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fallback_mode: string, The mode to use if locking fails.
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use_native_locking: bool, Whether or not fcntl/win32 locking is used.
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</pre>
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<dl class="fields">
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<dt>Decorators:</dt>
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<dd><ul class="nomargin-top">
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<li><code>@util.positional(4)</code></li>
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</ul></dd>
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<dt>Overrides:
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object.__init__
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</dt>
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</dl>
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</td></tr></table>
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</div>
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<a name="open_and_lock"></a>
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<div>
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<table class="details" border="1" cellpadding="3"
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cellspacing="0" width="100%" bgcolor="white">
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<tr><td>
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<tr valign="top"><td>
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<h3 class="epydoc"><span class="sig"><span class="sig-name">open_and_lock</span>(<span class="sig-arg">self</span>,
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<span class="sig-arg">timeout</span>=<span class="sig-default">0</span>,
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<span class="sig-arg">delay</span>=<span class="sig-default">0.05</span>)</span>
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</h3>
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</td><td align="right" valign="top"
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><span class="codelink"><a href="oauth2client.locked_file-pysrc.html#LockedFile.open_and_lock">source code</a></span>
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</td>
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</tr></table>
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<pre class="literalblock">
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Open the file, trying to lock it.
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Args:
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timeout: float, The number of seconds to try to acquire the lock.
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delay: float, The number of seconds to wait between retry attempts.
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Raises:
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AlreadyLockedException: if the lock is already acquired.
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IOError: if the open fails.
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</pre>
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