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<div class="section" id="account-db-and-container-db">
<span id="account-and-container-db"></span><h1>Account DB and Container DB<a class="headerlink" href="#account-db-and-container-db" title="Permalink to this headline">¶</a></h1>
<div class="section" id="module-swift.common.db">
<span id="db"></span><h2>DB<a class="headerlink" href="#module-swift.common.db" title="Permalink to this headline">¶</a></h2>
<p>Database code for Swift</p>
<dl class="class">
<dt id="swift.common.db.AccountBroker">
<em class="property">class </em><tt class="descclassname">swift.common.db.</tt><tt class="descname">AccountBroker</tt><big>(</big><em>db_file</em>, <em>timeout=25</em>, <em>logger=None</em>, <em>account=None</em>, <em>container=None</em>, <em>pending_timeout=10</em>, <em>stale_reads_ok=False</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a title="swift.common.db.DatabaseBroker" class="reference internal" href="#swift.common.db.DatabaseBroker"><tt class="xref docutils literal"><span class="pre">swift.common.db.DatabaseBroker</span></tt></a></p>
<p>Encapsulates working with a account database.</p>
<dl class="method">
<dt id="swift.common.db.AccountBroker.can_delete_db">
<tt class="descname">can_delete_db</tt><big>(</big><em>cutoff</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.can_delete_db" title="Permalink to this definition">¶</a></dt>
<dd><p>Check if the accont DB can be deleted.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">True if the account can be deleted, False otherwise</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.create_account_stat_table">
<tt class="descname">create_account_stat_table</tt><big>(</big><em>conn</em>, <em>put_timestamp</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.create_account_stat_table" title="Permalink to this definition">¶</a></dt>
<dd><p>Create account_stat table which is specific to the account DB.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>conn</em> – DB connection object</li>
<li><em>put_timestamp</em> – put timestamp</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.create_container_table">
<tt class="descname">create_container_table</tt><big>(</big><em>conn</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.create_container_table" title="Permalink to this definition">¶</a></dt>
<dd><p>Create container table which is specific to the account DB.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>conn</em> – DB connection object</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.empty">
<tt class="descname">empty</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.empty" title="Permalink to this definition">¶</a></dt>
<dd><p>Check if the account DB is empty.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">True if the database has no active containers.</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.get_container_timestamp">
<tt class="descname">get_container_timestamp</tt><big>(</big><em>container_name</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.get_container_timestamp" title="Permalink to this definition">¶</a></dt>
<dd><p>Get the put_timestamp of a container.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>container_name</em> – container name</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">put_timestamp of the container</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.get_info">
<tt class="descname">get_info</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.get_info" title="Permalink to this definition">¶</a></dt>
<dd><p>Get global data for the account.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">a tuple of (account, created_at, put_timestamp,
delete_timestamp, container_count, object_count,
bytes_used, hash, id)</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.get_random_containers">
<tt class="descname">get_random_containers</tt><big>(</big><em>max_count=100</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.get_random_containers" title="Permalink to this definition">¶</a></dt>
<dd><p>Get random containers from the DB. This is used by the
account_auditor when testing random containerss for existence.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>max_count</em> – maximum number of containers to get</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">list of container names</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.is_deleted">
<tt class="descname">is_deleted</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.is_deleted" title="Permalink to this definition">¶</a></dt>
<dd><p>Check if the account DB is considered to be deleted.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">True if the account DB is considered to be deleted, False
otherwise</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.is_status_deleted">
<tt class="descname">is_status_deleted</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.is_status_deleted" title="Permalink to this definition">¶</a></dt>
<dd>Only returns true if the status field is set to DELETED.</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.list_containers_iter">
<tt class="descname">list_containers_iter</tt><big>(</big><em>limit</em>, <em>marker</em>, <em>prefix</em>, <em>delimiter</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.list_containers_iter" title="Permalink to this definition">¶</a></dt>
<dd><p>Get a list of containerss sorted by name starting at marker onward, up
to limit entries. Entries will begin with the prefix and will not
have the delimiter after the prefix.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><em>limit</em> – maximum number of entries to get</li>
<li><em>marker</em> – marker query</li>
<li><em>prefix</em> – prefix query</li>
<li><em>delimeter</em> – delimeter for query</li>
</ul>
</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first last">list of tuples of (name, object_count, bytes_used, 0)</p>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.merge_items">
<tt class="descname">merge_items</tt><big>(</big><em>item_list</em>, <em>source=None</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.merge_items" title="Permalink to this definition">¶</a></dt>
<dd><p>Merge items into the container table.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>item_list</em> – list of dictionaries of {‘name’, ‘put_timestamp’,
‘delete_timestamp’, ‘object_count’, ‘bytes_used’,
‘deleted’}</li>
<li><em>source</em> – if defined, update incoming_sync with the source</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.put_container">
<tt class="descname">put_container</tt><big>(</big><em>name</em>, <em>put_timestamp</em>, <em>delete_timestamp</em>, <em>object_count</em>, <em>bytes_used</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.put_container" title="Permalink to this definition">¶</a></dt>
<dd><p>Create a container with the given attributes.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>name</em> – name of the container to create</li>
<li><em>put_timestamp</em> – put_timestamp of the container to create</li>
<li><em>delete_timestamp</em> – delete_timestamp of the container to create</li>
<li><em>object_count</em> – number of objects in the container</li>
<li><em>bytes_used</em> – number of bytes used by the container</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.reclaim">
<tt class="descname">reclaim</tt><big>(</big><em>container_timestamp</em>, <em>sync_timestamp</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.reclaim" title="Permalink to this definition">¶</a></dt>
<dd><p>Delete rows from the container table that are marked deleted and
whose created_at timestamp is < object_timestamp. Also deletes rows
from incoming_sync and outgoing_sync where the updated_at timestamp is
< sync_timestamp.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>object_timestamp</em> – max created_at timestamp of container rows to
delete</li>
<li><em>sync_timestamp</em> – max update_at timestamp of sync rows to delete</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.AccountBroker.update_put_timestamp">
<tt class="descname">update_put_timestamp</tt><big>(</big><em>timestamp</em><big>)</big><a class="headerlink" href="#swift.common.db.AccountBroker.update_put_timestamp" title="Permalink to this definition">¶</a></dt>
<dd><p>Update the put_timestamp. Only modifies it if it is greater than
the current timestamp.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>timestamp</em> – put timestamp</td>
</tr>
</tbody>
</table>
</dd></dl>
</dd></dl>
<dl class="data">
<dt id="swift.common.db.BROKER_TIMEOUT">
<tt class="descclassname">swift.common.db.</tt><tt class="descname">BROKER_TIMEOUT</tt><a class="headerlink" href="#swift.common.db.BROKER_TIMEOUT" title="Permalink to this definition">¶</a></dt>
<dd>Timeout for trying to connect to a DB</dd></dl>
<dl class="class">
<dt id="swift.common.db.ContainerBroker">
<em class="property">class </em><tt class="descclassname">swift.common.db.</tt><tt class="descname">ContainerBroker</tt><big>(</big><em>db_file</em>, <em>timeout=25</em>, <em>logger=None</em>, <em>account=None</em>, <em>container=None</em>, <em>pending_timeout=10</em>, <em>stale_reads_ok=False</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a title="swift.common.db.DatabaseBroker" class="reference internal" href="#swift.common.db.DatabaseBroker"><tt class="xref docutils literal"><span class="pre">swift.common.db.DatabaseBroker</span></tt></a></p>
<p>Encapsulates working with a container database.</p>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.create_container_stat_table">
<tt class="descname">create_container_stat_table</tt><big>(</big><em>conn</em>, <em>put_timestamp=None</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.create_container_stat_table" title="Permalink to this definition">¶</a></dt>
<dd><p>Create the container_stat table which is specifc to the container DB.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>conn</em> – DB connection object</li>
<li><em>put_timestamp</em> – put timestamp</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.create_object_table">
<tt class="descname">create_object_table</tt><big>(</big><em>conn</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.create_object_table" title="Permalink to this definition">¶</a></dt>
<dd><p>Create the object table which is specifc to the container DB.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>conn</em> – DB connection object</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.delete_object">
<tt class="descname">delete_object</tt><big>(</big><em>name</em>, <em>timestamp</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.delete_object" title="Permalink to this definition">¶</a></dt>
<dd><p>Mark an object deleted.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>name</em> – object name to be deleted</li>
<li><em>timestamp</em> – timestamp when the object was marked as deleted</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.empty">
<tt class="descname">empty</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.empty" title="Permalink to this definition">¶</a></dt>
<dd><p>Check if the DB is empty.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">True if the database has no active objects, False otherwise</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.get_info">
<tt class="descname">get_info</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.get_info" title="Permalink to this definition">¶</a></dt>
<dd><p>Get global data for the container.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">a tuple of (account, container, created_at, put_timestamp,
delete_timestamp, object_count, bytes_used,
reported_put_timestamp, reported_delete_timestamp,
reported_object_count, reported_bytes_used, hash, id)</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.get_random_objects">
<tt class="descname">get_random_objects</tt><big>(</big><em>max_count=100</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.get_random_objects" title="Permalink to this definition">¶</a></dt>
<dd><p>Get random objects from the DB. This is used by the container_auditor
when testing random objects for existence.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>max_count</em> – maximum number of objects to get</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">list of object names</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.is_deleted">
<tt class="descname">is_deleted</tt><big>(</big><em>timestamp=None</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.is_deleted" title="Permalink to this definition">¶</a></dt>
<dd><p>Check if the DB is considered to be deleted.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">True if the DB is considered to be deleted, False otherwise</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.list_objects_iter">
<tt class="descname">list_objects_iter</tt><big>(</big><em>limit</em>, <em>marker</em>, <em>prefix</em>, <em>delimiter</em>, <em>path=None</em>, <em>format=None</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.list_objects_iter" title="Permalink to this definition">¶</a></dt>
<dd><p>Get a list of objects sorted by name starting at marker onward, up
to limit entries. Entries will begin with the prefix and will not
have the delimiter after the prefix.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><em>limit</em> – maximum number of entries to get</li>
<li><em>marker</em> – marker query</li>
<li><em>prefix</em> – prefix query</li>
<li><em>delimeter</em> – delimeter for query</li>
<li><em>path</em> – if defined, will set the prefix and delimter based on
the path</li>
<li><em>format</em> – TOOD: remove as it is no longer used</li>
</ul>
</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first last">list of tuples of (name, created_at, size, content_type,
etag)</p>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.merge_items">
<tt class="descname">merge_items</tt><big>(</big><em>item_list</em>, <em>source=None</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.merge_items" title="Permalink to this definition">¶</a></dt>
<dd><p>Merge items into the object table.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>item_list</em> – list of dictionaries of {‘name’, ‘created_at’,
‘size’, ‘content_type’, ‘etag’, ‘deleted’}</li>
<li><em>source</em> – if defined, update incoming_sync with the source</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.put_object">
<tt class="descname">put_object</tt><big>(</big><em>name</em>, <em>timestamp</em>, <em>size</em>, <em>content_type</em>, <em>etag</em>, <em>deleted=0</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.put_object" title="Permalink to this definition">¶</a></dt>
<dd><p>Creates an object in the DB with its metadata.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>name</em> – object name to be created</li>
<li><em>timestamp</em> – timestamp of when the object was created</li>
<li><em>size</em> – object size</li>
<li><em>content_type</em> – object content-type</li>
<li><em>etag</em> – object etag</li>
<li><em>deleted</em> – if True, marks the object as deleted and sets the
deteleted_at timestamp to timestamp</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.reclaim">
<tt class="descname">reclaim</tt><big>(</big><em>object_timestamp</em>, <em>sync_timestamp</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.reclaim" title="Permalink to this definition">¶</a></dt>
<dd><p>Delete rows from the object table that are marked deleted and
whose created_at timestamp is < object_timestamp. Also deletes rows
from incoming_sync and outgoing_sync where the updated_at timestamp is
< sync_timestamp.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>object_timestamp</em> – max created_at timestamp of object rows to
delete</li>
<li><em>sync_timestamp</em> – max update_at timestamp of sync rows to delete</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.reported">
<tt class="descname">reported</tt><big>(</big><em>put_timestamp</em>, <em>delete_timestamp</em>, <em>object_count</em>, <em>bytes_used</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.reported" title="Permalink to this definition">¶</a></dt>
<dd><p>Update reported stats.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>put_timestamp</em> – put_timestamp to update</li>
<li><em>delete_timestamp</em> – delete_timestamp to update</li>
<li><em>object_count</em> – object_count to update</li>
<li><em>bytes_used</em> – bytes_used to update</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.ContainerBroker.update_put_timestamp">
<tt class="descname">update_put_timestamp</tt><big>(</big><em>timestamp</em><big>)</big><a class="headerlink" href="#swift.common.db.ContainerBroker.update_put_timestamp" title="Permalink to this definition">¶</a></dt>
<dd><p>Update the put_timestamp. Only modifies it if it is greater than
the current timestamp.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>timestamp</em> – put timestamp</td>
</tr>
</tbody>
</table>
</dd></dl>
</dd></dl>
<dl class="class">
<dt id="swift.common.db.DatabaseBroker">
<em class="property">class </em><tt class="descclassname">swift.common.db.</tt><tt class="descname">DatabaseBroker</tt><big>(</big><em>db_file</em>, <em>timeout=25</em>, <em>logger=None</em>, <em>account=None</em>, <em>container=None</em>, <em>pending_timeout=10</em>, <em>stale_reads_ok=False</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <tt class="xref docutils literal"><span class="pre">object</span></tt></p>
<p>Encapsulates working with a database.</p>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.delete_db">
<tt class="descname">delete_db</tt><big>(</big><em>timestamp</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.delete_db" title="Permalink to this definition">¶</a></dt>
<dd><p>Mark the DB as deleted</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>timestamp</em> – delete timestamp</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.get">
<tt class="descname">get</tt><big>(</big><em>*args</em>, <em>**kwds</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.get" title="Permalink to this definition">¶</a></dt>
<dd>Use with the “with” statement; returns a database connection.</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.get_items_since">
<tt class="descname">get_items_since</tt><big>(</big><em>start</em>, <em>count</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.get_items_since" title="Permalink to this definition">¶</a></dt>
<dd><p>Get a list of objects in the database between start and end.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><em>start</em> – start ROWID</li>
<li><em>count</em> – number to get</li>
</ul>
</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first last">list of objects between start and end</p>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.get_replication_info">
<tt class="descname">get_replication_info</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.get_replication_info" title="Permalink to this definition">¶</a></dt>
<dd><p>Get information about the DB required for replication.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">tuple of (hash, id, created_at, put_timestamp,
delete_timestamp) from the DB</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.get_sync">
<tt class="descname">get_sync</tt><big>(</big><em>id</em>, <em>incoming=True</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.get_sync" title="Permalink to this definition">¶</a></dt>
<dd><p>Gets the most recent sync point for a server from the sync table.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><em>id</em> – remote ID to get the sync_point for</li>
<li><em>incoming</em> – if True, get the last incoming sync, otherwise get
the last outgoing sync</li>
</ul>
</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first last">the sync point, or -1 if the id doesn’t exist.</p>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.get_syncs">
<tt class="descname">get_syncs</tt><big>(</big><em>incoming=True</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.get_syncs" title="Permalink to this definition">¶</a></dt>
<dd><p>Get a serialized copy of the sync table.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>incoming</em> – if True, get the last incoming sync, otherwise get
the last outgoing sync</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">list of {‘remote_id’, ‘sync_point’}</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.initialize">
<tt class="descname">initialize</tt><big>(</big><em>put_timestamp=None</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.initialize" title="Permalink to this definition">¶</a></dt>
<dd><p>Create the DB</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>put_timestamp</em> – timestamp of initial PUT request</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.lock">
<tt class="descname">lock</tt><big>(</big><em>*args</em>, <em>**kwds</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.lock" title="Permalink to this definition">¶</a></dt>
<dd>Use with the “with” statement; locks a database.</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.merge_syncs">
<tt class="descname">merge_syncs</tt><big>(</big><em>sync_points</em>, <em>incoming=True</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.merge_syncs" title="Permalink to this definition">¶</a></dt>
<dd><p>Merge a list of sync points with the incoming sync table.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>sync_points</em> – list of sync points where a sync point is a dict of
{‘sync_point’, ‘remote_id’}</li>
<li><em>incoming</em> – if True, get the last incoming sync, otherwise get
the last outgoing sync</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.merge_timestamps">
<tt class="descname">merge_timestamps</tt><big>(</big><em>created_at</em>, <em>put_timestamp</em>, <em>delete_timestamp</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.merge_timestamps" title="Permalink to this definition">¶</a></dt>
<dd><p>Used in replication to handle updating timestamps.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>created_at</em> – create timestamp</li>
<li><em>put_timestamp</em> – put timestamp</li>
<li><em>delete_timestamp</em> – delete timestamp</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="method">
<dt id="swift.common.db.DatabaseBroker.newid">
<tt class="descname">newid</tt><big>(</big><em>remote_id</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseBroker.newid" title="Permalink to this definition">¶</a></dt>
<dd><p>Re-id the database. This should be called after an rsync.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>remote_id</em> – the ID of the remote database being rsynced in</td>
</tr>
</tbody>
</table>
</dd></dl>
</dd></dl>
<dl class="exception">
<dt id="swift.common.db.DatabaseConnectionError">
<em class="property">exception </em><tt class="descclassname">swift.common.db.</tt><tt class="descname">DatabaseConnectionError</tt><big>(</big><em>path</em>, <em>msg</em>, <em>timeout=0</em><big>)</big><a class="headerlink" href="#swift.common.db.DatabaseConnectionError" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <tt class="xref docutils literal"><span class="pre">sqlite3.DatabaseError</span></tt></p>
<p>More friendly error messages for DB Errors.</p>
</dd></dl>
<dl class="class">
<dt id="swift.common.db.GreenDBConnection">
<em class="property">class </em><tt class="descclassname">swift.common.db.</tt><tt class="descname">GreenDBConnection</tt><big>(</big><em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#swift.common.db.GreenDBConnection" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <tt class="xref docutils literal"><span class="pre">sqlite3.Connection</span></tt></p>
<p>SQLite DB Connection handler that plays well with eventlet.</p>
<dl class="method">
<dt id="swift.common.db.GreenDBConnection.commit">
<tt class="descname">commit</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db.GreenDBConnection.commit" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="swift.common.db.GreenDBConnection.execute">
<tt class="descname">execute</tt><big>(</big><em>*args</em>, <em>**kwargs</em><big>)</big><a class="headerlink" href="#swift.common.db.GreenDBConnection.execute" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="data">
<dt id="swift.common.db.PENDING_CAP">
<tt class="descclassname">swift.common.db.</tt><tt class="descname">PENDING_CAP</tt><a class="headerlink" href="#swift.common.db.PENDING_CAP" title="Permalink to this definition">¶</a></dt>
<dd>Max number of pending entries</dd></dl>
<dl class="data">
<dt id="swift.common.db.PICKLE_PROTOCOL">
<tt class="descclassname">swift.common.db.</tt><tt class="descname">PICKLE_PROTOCOL</tt><a class="headerlink" href="#swift.common.db.PICKLE_PROTOCOL" title="Permalink to this definition">¶</a></dt>
<dd>Pickle protocol to use</dd></dl>
<dl class="function">
<dt id="swift.common.db.chexor">
<tt class="descclassname">swift.common.db.</tt><tt class="descname">chexor</tt><big>(</big><em>old</em>, <em>name</em>, <em>timestamp</em><big>)</big><a class="headerlink" href="#swift.common.db.chexor" title="Permalink to this definition">¶</a></dt>
<dd><p>Each entry in the account and container databases is XORed by the 128-bit
hash on insert or delete. This serves as a rolling, order-independent hash
of the contents. (check + XOR)</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><em>old</em> – hex representation of the current DB hash</li>
<li><em>name</em> – name of the object or container being inserted</li>
<li><em>timestamp</em> – timestamp of the new record</li>
</ul>
</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first last">a hex representation of the new hash value</p>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<dl class="function">
<dt id="swift.common.db.dict_factory">
<tt class="descclassname">swift.common.db.</tt><tt class="descname">dict_factory</tt><big>(</big><em>crs</em>, <em>row</em><big>)</big><a class="headerlink" href="#swift.common.db.dict_factory" title="Permalink to this definition">¶</a></dt>
<dd>This should only be used when you need a real dict,
i.e. when you’re going to serialize the results.</dd></dl>
<dl class="function">
<dt id="swift.common.db.get_db_connection">
<tt class="descclassname">swift.common.db.</tt><tt class="descname">get_db_connection</tt><big>(</big><em>path</em>, <em>timeout=30</em>, <em>okay_to_create=False</em><big>)</big><a class="headerlink" href="#swift.common.db.get_db_connection" title="Permalink to this definition">¶</a></dt>
<dd><p>Returns a properly configured SQLite database connection.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first simple">
<li><em>path</em> – path to DB</li>
<li><em>timeout</em> – timeout for connection</li>
<li><em>okay_to_create</em> – if True, create the DB if it doesn’t exist</li>
</ul>
</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first last">DB connection object</p>
</td>
</tr>
</tbody>
</table>
</dd></dl>
</div>
<div class="section" id="module-swift.common.db_replicator">
<span id="db-replicator"></span><h2>DB replicator<a class="headerlink" href="#module-swift.common.db_replicator" title="Permalink to this headline">¶</a></h2>
<dl class="class">
<dt id="swift.common.db_replicator.ReplConnection">
<em class="property">class </em><tt class="descclassname">swift.common.db_replicator.</tt><tt class="descname">ReplConnection</tt><big>(</big><em>node</em>, <em>partition</em>, <em>hash_</em>, <em>logger</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.ReplConnection" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <a title="swift.common.bufferedhttp.BufferedHTTPConnection" class="reference external" href="misc.html#swift.common.bufferedhttp.BufferedHTTPConnection"><tt class="xref docutils literal"><span class="pre">swift.common.bufferedhttp.BufferedHTTPConnection</span></tt></a></p>
<p>Helper to simplify POSTing to a remote server.</p>
<dl class="method">
<dt id="swift.common.db_replicator.ReplConnection.post">
<tt class="descname">post</tt><big>(</big><em>*args</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.ReplConnection.post" title="Permalink to this definition">¶</a></dt>
<dd><p>Make an HTTP POST request</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>args</em> – list of json-encodable objects</td>
</tr>
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">httplib response object</td>
</tr>
</tbody>
</table>
</dd></dl>
</dd></dl>
<dl class="class">
<dt id="swift.common.db_replicator.Replicator">
<em class="property">class </em><tt class="descclassname">swift.common.db_replicator.</tt><tt class="descname">Replicator</tt><big>(</big><em>server_conf</em>, <em>replicator_conf</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.Replicator" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <tt class="xref docutils literal"><span class="pre">object</span></tt></p>
<p>Implements the logic for directing db replication.</p>
<dl class="method">
<dt id="swift.common.db_replicator.Replicator.replicate_forever">
<tt class="descname">replicate_forever</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db_replicator.Replicator.replicate_forever" title="Permalink to this definition">¶</a></dt>
<dd>Replicate dbs under the given root in an infinite loop.</dd></dl>
<dl class="method">
<dt id="swift.common.db_replicator.Replicator.replicate_once">
<tt class="descname">replicate_once</tt><big>(</big><big>)</big><a class="headerlink" href="#swift.common.db_replicator.Replicator.replicate_once" title="Permalink to this definition">¶</a></dt>
<dd>Run a replication pass once.</dd></dl>
<dl class="method">
<dt id="swift.common.db_replicator.Replicator.roundrobin_datadirs">
<tt class="descname">roundrobin_datadirs</tt><big>(</big><em>datadirs</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.Replicator.roundrobin_datadirs" title="Permalink to this definition">¶</a></dt>
<dd><p>Generator to walk the data dirs in a round robin manner, evenly
hitting each device on the system.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>datadirs</em> – a list of paths to walk</td>
</tr>
</tbody>
</table>
</dd></dl>
</dd></dl>
<dl class="class">
<dt id="swift.common.db_replicator.ReplicatorRpc">
<em class="property">class </em><tt class="descclassname">swift.common.db_replicator.</tt><tt class="descname">ReplicatorRpc</tt><big>(</big><em>root</em>, <em>datadir</em>, <em>broker_class</em>, <em>mount_check=True</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.ReplicatorRpc" title="Permalink to this definition">¶</a></dt>
<dd><p>Bases: <tt class="xref docutils literal"><span class="pre">object</span></tt></p>
<p>Handle Replication RPC calls. TODO: redbo document please :)</p>
<dl class="method">
<dt id="swift.common.db_replicator.ReplicatorRpc.complete_rsync">
<tt class="descname">complete_rsync</tt><big>(</big><em>drive</em>, <em>db_file</em>, <em>args</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.ReplicatorRpc.complete_rsync" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="swift.common.db_replicator.ReplicatorRpc.dispatch">
<tt class="descname">dispatch</tt><big>(</big><em>post_args</em>, <em>args</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.ReplicatorRpc.dispatch" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="swift.common.db_replicator.ReplicatorRpc.merge_items">
<tt class="descname">merge_items</tt><big>(</big><em>broker</em>, <em>args</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.ReplicatorRpc.merge_items" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="swift.common.db_replicator.ReplicatorRpc.merge_syncs">
<tt class="descname">merge_syncs</tt><big>(</big><em>broker</em>, <em>args</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.ReplicatorRpc.merge_syncs" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="swift.common.db_replicator.ReplicatorRpc.rsync_then_merge">
<tt class="descname">rsync_then_merge</tt><big>(</big><em>drive</em>, <em>db_file</em>, <em>args</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.ReplicatorRpc.rsync_then_merge" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
<dl class="method">
<dt id="swift.common.db_replicator.ReplicatorRpc.sync">
<tt class="descname">sync</tt><big>(</big><em>broker</em>, <em>args</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.ReplicatorRpc.sync" title="Permalink to this definition">¶</a></dt>
<dd></dd></dl>
</dd></dl>
<dl class="function">
<dt id="swift.common.db_replicator.quarantine_db">
<tt class="descclassname">swift.common.db_replicator.</tt><tt class="descname">quarantine_db</tt><big>(</big><em>object_file</em>, <em>server_type</em><big>)</big><a class="headerlink" href="#swift.common.db_replicator.quarantine_db" title="Permalink to this definition">¶</a></dt>
<dd><p>In the case that a corrupt file is found, move it to a quarantined area to
allow replication to fix it.</p>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><em>object_file</em> – path to corrupt file</li>
<li><em>server_type</em> – type of file that is corrupt
(‘container’ or ‘account’)</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
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