| Joe Gregorio | 6621203 | 2012-06-14 09:10:14 -0400 | [diff] [blame] | 1 | <?xml version="1.0" encoding="ascii"?> |
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| 37 | <a href="oauth2client-module.html">Package oauth2client</a> :: |
| 38 | Module locked_file |
| 39 | </span> |
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| 54 | <!-- ==================== MODULE DESCRIPTION ==================== --> |
| 55 | <h1 class="epydoc">Module locked_file</h1><p class="nomargin-top"><span class="codelink"><a href="oauth2client.locked_file-pysrc.html">source code</a></span></p> |
| 56 | <pre class="literalblock"> |
| 57 | Locked file interface that should work on Unix and Windows pythons. |
| 58 | |
| 59 | This module first tries to use fcntl locking to ensure serialized access |
| 60 | to a file, then falls back on a lock file if that is unavialable. |
| 61 | |
| 62 | Usage: |
| 63 | f = LockedFile('filename', 'r+b', 'rb') |
| 64 | f.open_and_lock() |
| 65 | if f.is_locked(): |
| 66 | print 'Acquired filename with r+b mode' |
| 67 | f.file_handle().write('locked data') |
| 68 | else: |
| 69 | print 'Aquired filename with rb mode' |
| 70 | f.unlock_and_close() |
| 71 | |
| 72 | </pre> |
| 73 | |
| 74 | <hr /> |
| 75 | <div class="fields"> <p><strong>Author:</strong> |
| 76 | cache@google.com (David T McWherter) |
| 77 | </p> |
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| 97 | <span class="summary-type"> </span> |
| 98 | </td><td class="summary"> |
| 99 | <a href="oauth2client.locked_file.AlreadyLockedException-class.html" class="summary-name">AlreadyLockedException</a><br /> |
| 100 | Trying to lock a file that has already been locked by the LockedFile. |
| 101 | </td> |
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| 106 | </td><td class="summary"> |
| 107 | <a href="oauth2client.locked_file._Opener-class.html" class="summary-name" onclick="show_private();">_Opener</a><br /> |
| 108 | Base class for different locking primitives. |
| 109 | </td> |
| 110 | </tr> |
| 111 | <tr class="private"> |
| 112 | <td width="15%" align="right" valign="top" class="summary"> |
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| 115 | <a href="oauth2client.locked_file._PosixOpener-class.html" class="summary-name" onclick="show_private();">_PosixOpener</a><br /> |
| 116 | Lock files using Posix advisory lock files. |
| 117 | </td> |
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| 123 | <a href="oauth2client.locked_file._FcntlOpener-class.html" class="summary-name" onclick="show_private();">_FcntlOpener</a><br /> |
| 124 | Open, lock, and unlock a file using fcntl.lockf. |
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| 127 | <tr> |
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| 129 | <span class="summary-type"> </span> |
| 130 | </td><td class="summary"> |
| 131 | <a href="oauth2client.locked_file.LockedFile-class.html" class="summary-name">LockedFile</a><br /> |
| 132 | Represent a file that has exclusive access. |
| 133 | </td> |
| 134 | </tr> |
| 135 | </table> |
| 136 | <!-- ==================== VARIABLES ==================== --> |
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| Joe Gregorio | bf14cef | 2012-06-22 15:26:16 -0400 | [diff] [blame^] | 160 | <tr class="private"> |
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| 164 | <a name="_Win32Opener"></a><span class="summary-name">_Win32Opener</span> = <code title="None">None</code> |
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| Joe Gregorio | 6621203 | 2012-06-14 09:10:14 -0400 | [diff] [blame] | 167 | <tr> |
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| 171 | <a name="__package__"></a><span class="summary-name">__package__</span> = <code title="'oauth2client'"><code class="variable-quote">'</code><code class="variable-string">oauth2client</code><code class="variable-quote">'</code></code> |
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| Joe Gregorio | bf14cef | 2012-06-22 15:26:16 -0400 | [diff] [blame^] | 198 | Generated by Epydoc 3.0.1 on Fri Jun 22 14:19:32 2012 |
| Joe Gregorio | 6621203 | 2012-06-14 09:10:14 -0400 | [diff] [blame] | 199 | </td> |
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