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<?xml version="1.0" encoding="ascii"?>
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<title>Camelot.camelot.core.backup.BackupMechanism</title>
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Package Camelot ::
<a href="Camelot.camelot-module.html">Package camelot</a> ::
<a href="Camelot.camelot.core-module.html">Package core</a> ::
<a href="Camelot.camelot.core.backup-module.html">Module backup</a> ::
Class BackupMechanism
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class BackupMechanism</h1><p class="nomargin-top"><span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism">source code</a></span></p>
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<hr />
<p>Create a backup of the current database to an sqlite database stored in
filename.</p>
<p>The backupmechanism always considers the schema of the backed up database
as the master, and never that of the backup. This means that when a backup
is made, the backup file is first removed, and then filled with the tables
from the the database to backup. When a restore is done, the schema of the
database is not touched, but the tables are emptied and the data from the
backup is copied into the existing schema.</p>
<!-- ==================== 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 align="left" colspan="2" class="table-header">
<span class="table-header">Instance Methods</span></td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="Camelot.camelot.core.backup.BackupMechanism-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">filename</span>)</span><br />
Backup and restore to a local file using it as an sqlite database</td>
<td align="right" valign="top">
<span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.__init__">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="Camelot.camelot.core.backup.BackupMechanism-class.html#backup_table_filter" class="summary-sig-name">backup_table_filter</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">from_table</span>)</span><br />
Method used to filter which tables should be backed up, overwrite this method
for taking into account specific schema issues.</td>
<td align="right" valign="top">
<span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.backup_table_filter">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a href="Camelot.camelot.core.backup.BackupMechanism-class.html#restore_table_filter" class="summary-sig-name">restore_table_filter</a>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">from_table</span>)</span><br />
Method used to filter which tables should be restored, overwrite this method
for taking into account specific schema issues. restore_table_filter is different
from backup_table_filter, since we might want to store data in the backup that
should not be restored, like schema version information.</td>
<td align="right" valign="top">
<span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.restore_table_filter">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="prepare_schema_for_restore"></a><span class="summary-sig-name">prepare_schema_for_restore</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">from_engine</span>,
<span class="summary-sig-arg">to_engine</span>)</span><br />
This method will be called before the actual restore starts. It allows bringing
the schema at the same revision as the backed up data.</td>
<td align="right" valign="top">
<span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.prepare_schema_for_restore">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="update_schema_after_restore"></a><span class="summary-sig-name">update_schema_after_restore</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">from_engine</span>,
<span class="summary-sig-arg">to_engine</span>)</span><br />
This method will be called after the restore has been done. It allows bringing
the schema at the revision the application expects.</td>
<td align="right" valign="top">
<span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.update_schema_after_restore">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="backup"></a><span class="summary-sig-name">backup</span>(<span class="summary-sig-arg">self</span>)</span><br />
Generator function that yields tuples :
(numer_of_steps_completed, total_number_of_steps, description_of_current_step)
while performing a backup.</td>
<td align="right" valign="top">
<span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.backup">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="restore"></a><span class="summary-sig-name">restore</span>(<span class="summary-sig-arg">self</span>)</span><br />
Generator function that yields tuples :
(numer_of_steps_completed, total_number_of_steps, description_of_current_step)
while performing a restore.</td>
<td align="right" valign="top">
<span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.restore">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="delete_table_data"></a><span class="summary-sig-name">delete_table_data</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">to_table</span>)</span><br />
This method might be subclassed to turn off/on foreign key checks</td>
<td align="right" valign="top">
<span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.delete_table_data">source code</a></span>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"> </span>
</td><td class="summary">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td><span class="summary-sig"><a name="copy_table_data"></a><span class="summary-sig-name">copy_table_data</span>(<span class="summary-sig-arg">self</span>,
<span class="summary-sig-arg">from_table</span>,
<span class="summary-sig-arg">to_table</span>)</span></td>
<td align="right" valign="top">
<span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.copy_table_data">source code</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>__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 align="left" colspan="2" class="table-header">
<span class="table-header">Properties</span></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>
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cellspacing="0" width="100%" bgcolor="white">
<tr bgcolor="#70b0f0" class="table-header">
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<span class="table-header">Method Details</span></td>
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<a name="__init__"></a>
<div>
<table class="details" border="1" cellpadding="3"
cellspacing="0" width="100%" bgcolor="white">
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<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">filename</span>)</span>
<br /><em class="fname">(Constructor)</em>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.__init__">source code</a></span>
</td>
</tr></table>
Backup and restore to a local file using it as an sqlite database
<dl class="fields">
<dt>Overrides:
object.__init__
</dt>
</dl>
</td></tr></table>
</div>
<a name="backup_table_filter"></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">backup_table_filter</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">from_table</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.backup_table_filter">source code</a></span>
</td>
</tr></table>
Method used to filter which tables should be backed up, overwrite this method
for taking into account specific schema issues.
<dl class="fields">
<dt>Returns:</dt>
<dd>True when the table should be backed up</dd>
</dl>
</td></tr></table>
</div>
<a name="restore_table_filter"></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">restore_table_filter</span>(<span class="sig-arg">self</span>,
<span class="sig-arg">from_table</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="Camelot.camelot.core.backup-pysrc.html#BackupMechanism.restore_table_filter">source code</a></span>
</td>
</tr></table>
Method used to filter which tables should be restored, overwrite this method
for taking into account specific schema issues. restore_table_filter is different
from backup_table_filter, since we might want to store data in the backup that
should not be restored, like schema version information.
<dl class="fields">
<dt>Returns:</dt>
<dd>True when the table should be restored</dd>
</dl>
</td></tr></table>
</div>
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