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  <h1>Source code for rdflib.plugins.stores.auditable</h1><div class="highlight"><pre>
<span class="sd">&quot;&quot;&quot;</span>

<span class="sd">This wrapper intercepts calls through the store interface and implements</span>
<span class="sd">thread-safe logging of destructive operations (adds / removes) in reverse.</span>
<span class="sd">This is persisted on the store instance and the reverse operations are</span>
<span class="sd">executed In order to return the store to the state it was when the transaction</span>
<span class="sd">began Since the reverse operations are persisted on the store, the store</span>
<span class="sd">itself acts as a transaction.</span>

<span class="sd">Calls to commit or rollback, flush the list of reverse operations This</span>
<span class="sd">provides thread-safe atomicity and isolation (assuming concurrent operations</span>
<span class="sd">occur with different store instances), but no durability (transactions are</span>
<span class="sd">persisted in memory and wont  be available to reverse operations after the</span>
<span class="sd">system fails): A and I out of ACID.</span>

<span class="sd">&quot;&quot;&quot;</span>

<span class="kn">from</span> <span class="nn">rdflib.store</span> <span class="kn">import</span> <span class="n">Store</span>
<span class="kn">from</span> <span class="nn">rdflib</span> <span class="kn">import</span> <span class="n">Graph</span><span class="p">,</span> <span class="n">ConjunctiveGraph</span>
<span class="kn">import</span> <span class="nn">threading</span>

<span class="n">destructiveOpLocks</span> <span class="o">=</span> <span class="p">{</span>
    <span class="s">&#39;add&#39;</span><span class="p">:</span> <span class="bp">None</span><span class="p">,</span>
    <span class="s">&#39;remove&#39;</span><span class="p">:</span> <span class="bp">None</span><span class="p">,</span>
<span class="p">}</span>


<div class="viewcode-block" id="AuditableStore"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore">[docs]</a><span class="k">class</span> <span class="nc">AuditableStore</span><span class="p">(</span><span class="n">Store</span><span class="p">):</span>
<div class="viewcode-block" id="AuditableStore.__init__"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.__init__">[docs]</a>    <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">store</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">store</span> <span class="o">=</span> <span class="n">store</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">context_aware</span> <span class="o">=</span> <span class="n">store</span><span class="o">.</span><span class="n">context_aware</span>
        <span class="c"># NOTE: this store can&#39;t be formula_aware as it doesn&#39;t have enough</span>
        <span class="c"># info to reverse the removal of a quoted statement</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">formula_aware</span> <span class="o">=</span> <span class="bp">False</span>  <span class="c"># store.formula_aware</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">transaction_aware</span> <span class="o">=</span> <span class="bp">True</span>  <span class="c"># This is only half true</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span> <span class="o">=</span> <span class="p">[]</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">rollbackLock</span> <span class="o">=</span> <span class="n">threading</span><span class="o">.</span><span class="n">RLock</span><span class="p">()</span>
</div>
<div class="viewcode-block" id="AuditableStore.open"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.open">[docs]</a>    <span class="k">def</span> <span class="nf">open</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">configuration</span><span class="p">,</span> <span class="n">create</span><span class="o">=</span><span class="bp">True</span><span class="p">):</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">configuration</span><span class="p">,</span> <span class="n">create</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="AuditableStore.close"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.close">[docs]</a>    <span class="k">def</span> <span class="nf">close</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">commit_pending_transaction</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>
</div>
<div class="viewcode-block" id="AuditableStore.destroy"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.destroy">[docs]</a>    <span class="k">def</span> <span class="nf">destroy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">configuration</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">destroy</span><span class="p">(</span><span class="n">configuration</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="AuditableStore.add"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.add">[docs]</a>    <span class="k">def</span> <span class="nf">add</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">triple</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">quoted</span><span class="o">=</span><span class="bp">False</span><span class="p">):</span>
        <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">)</span> <span class="o">=</span> <span class="n">triple</span>
        <span class="n">lock</span> <span class="o">=</span> <span class="n">destructiveOpLocks</span><span class="p">[</span><span class="s">&#39;add&#39;</span><span class="p">]</span>
        <span class="n">lock</span> <span class="o">=</span> <span class="n">lock</span> <span class="ow">and</span> <span class="n">lock</span> <span class="ow">or</span> <span class="n">threading</span><span class="o">.</span><span class="n">RLock</span><span class="p">()</span>
        <span class="n">lock</span><span class="o">.</span><span class="n">acquire</span><span class="p">()</span>
        <span class="n">context</span> <span class="o">=</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="ow">and</span> <span class="n">context</span><span class="o">.</span><span class="n">__class__</span><span class="p">(</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="p">,</span> <span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="p">)</span> <span class="ow">or</span> <span class="bp">None</span>
        <span class="n">ctxId</span> <span class="o">=</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="ow">and</span> <span class="n">context</span><span class="o">.</span><span class="n">identifier</span> <span class="ow">or</span> <span class="bp">None</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">ctxId</span><span class="p">,</span> <span class="s">&#39;remove&#39;</span><span class="p">))</span>
        <span class="k">if</span> <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">ctxId</span><span class="p">,</span> <span class="s">&#39;add&#39;</span><span class="p">)</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="p">:</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span>
                <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="s">&#39;add&#39;</span><span class="p">))</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">add</span><span class="p">((</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">),</span> <span class="n">context</span><span class="p">,</span> <span class="n">quoted</span><span class="p">)</span>
        <span class="n">lock</span><span class="o">.</span><span class="n">release</span><span class="p">()</span>
</div>
<div class="viewcode-block" id="AuditableStore.remove"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.remove">[docs]</a>    <span class="k">def</span> <span class="nf">remove</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">object_</span><span class="p">),</span> <span class="n">context</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
        <span class="n">lock</span> <span class="o">=</span> <span class="n">destructiveOpLocks</span><span class="p">[</span><span class="s">&#39;remove&#39;</span><span class="p">]</span>
        <span class="n">lock</span> <span class="o">=</span> <span class="n">lock</span> <span class="ow">and</span> <span class="n">lock</span> <span class="ow">or</span> <span class="n">threading</span><span class="o">.</span><span class="n">RLock</span><span class="p">()</span>
        <span class="n">lock</span><span class="o">.</span><span class="n">acquire</span><span class="p">()</span>
        <span class="c"># Need to determine which quads will be removed if any term is a</span>
        <span class="c"># wildcard</span>
        <span class="n">context</span> <span class="o">=</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="ow">and</span> <span class="n">context</span><span class="o">.</span><span class="n">__class__</span><span class="p">(</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="p">,</span> <span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="p">)</span> <span class="ow">or</span> <span class="bp">None</span>
        <span class="n">ctxId</span> <span class="o">=</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="ow">and</span> <span class="n">context</span><span class="o">.</span><span class="n">identifier</span> <span class="ow">or</span> <span class="bp">None</span>
        <span class="k">if</span> <span class="bp">None</span> <span class="ow">in</span> <span class="p">[</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">object_</span><span class="p">,</span> <span class="n">context</span><span class="p">]:</span>
            <span class="k">if</span> <span class="n">ctxId</span><span class="p">:</span>
                <span class="k">for</span> <span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span> <span class="ow">in</span> <span class="n">context</span><span class="o">.</span><span class="n">triples</span><span class="p">((</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">object_</span><span class="p">)):</span>
                    <span class="k">if</span> <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">ctxId</span><span class="p">,</span> <span class="s">&#39;remove&#39;</span><span class="p">)</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="p">:</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="o">.</span><span class="n">remove</span><span class="p">((</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">ctxId</span><span class="p">,</span> <span class="s">&#39;remove&#39;</span><span class="p">))</span>
                    <span class="k">else</span><span class="p">:</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">ctxId</span><span class="p">,</span> <span class="s">&#39;add&#39;</span><span class="p">))</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="k">for</span> <span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">ctx</span> <span class="ow">in</span> <span class="n">ConjunctiveGraph</span><span class="p">(</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="p">)</span><span class="o">.</span><span class="n">quads</span><span class="p">((</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">object_</span><span class="p">)):</span>
                    <span class="k">if</span> <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">identifier</span><span class="p">,</span> <span class="s">&#39;remove&#39;</span><span class="p">)</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="p">:</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span>
                            <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">identifier</span><span class="p">,</span> <span class="s">&#39;remove&#39;</span><span class="p">))</span>
                    <span class="k">else</span><span class="p">:</span>
                        <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
                            <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">,</span> <span class="n">ctx</span><span class="o">.</span><span class="n">identifier</span><span class="p">,</span> <span class="s">&#39;add&#39;</span><span class="p">))</span>

        <span class="k">elif</span> <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">object_</span><span class="p">,</span> <span class="n">ctxId</span><span class="p">,</span> <span class="s">&#39;add&#39;</span><span class="p">)</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="p">:</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span>
                <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">object_</span><span class="p">,</span> <span class="n">ctxId</span><span class="p">,</span> <span class="s">&#39;add&#39;</span><span class="p">))</span>
        <span class="k">else</span><span class="p">:</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="o">.</span><span class="n">append</span><span class="p">(</span>
                <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">object_</span><span class="p">,</span> <span class="n">ctxId</span><span class="p">,</span> <span class="s">&#39;add&#39;</span><span class="p">))</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">remove</span><span class="p">((</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">object_</span><span class="p">),</span> <span class="n">context</span><span class="p">)</span>
        <span class="n">lock</span><span class="o">.</span><span class="n">release</span><span class="p">()</span>
</div>
<div class="viewcode-block" id="AuditableStore.triples"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.triples">[docs]</a>    <span class="k">def</span> <span class="nf">triples</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">triple</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
        <span class="p">(</span><span class="n">su</span><span class="p">,</span> <span class="n">pr</span><span class="p">,</span> <span class="n">ob</span><span class="p">)</span> <span class="o">=</span> <span class="n">triple</span>
        <span class="n">context</span> <span class="o">=</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="ow">and</span> <span class="n">context</span><span class="o">.</span><span class="n">__class__</span><span class="p">(</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="p">,</span> <span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="p">)</span> <span class="ow">or</span> <span class="bp">None</span>
        <span class="k">for</span> <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">),</span> <span class="n">cg</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">triples</span><span class="p">((</span><span class="n">su</span><span class="p">,</span> <span class="n">pr</span><span class="p">,</span> <span class="n">ob</span><span class="p">),</span> <span class="n">context</span><span class="p">):</span>
            <span class="k">yield</span> <span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="n">o</span><span class="p">),</span> <span class="n">cg</span>
</div>
<div class="viewcode-block" id="AuditableStore.__len__"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.__len__">[docs]</a>    <span class="k">def</span> <span class="nf">__len__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">context</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
        <span class="n">context</span> <span class="o">=</span> <span class="n">context</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span> <span class="ow">and</span> <span class="n">context</span><span class="o">.</span><span class="n">__class__</span><span class="p">(</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="p">,</span> <span class="n">context</span><span class="o">.</span><span class="n">identifier</span><span class="p">)</span> <span class="ow">or</span> <span class="bp">None</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">__len__</span><span class="p">(</span><span class="n">context</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="AuditableStore.contexts"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.contexts">[docs]</a>    <span class="k">def</span> <span class="nf">contexts</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">triple</span><span class="o">=</span><span class="bp">None</span><span class="p">):</span>
        <span class="k">for</span> <span class="n">ctx</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">contexts</span><span class="p">(</span><span class="n">triple</span><span class="p">):</span>
            <span class="k">yield</span> <span class="n">ctx</span>
</div>
<div class="viewcode-block" id="AuditableStore.bind"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.bind">[docs]</a>    <span class="k">def</span> <span class="nf">bind</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">namespace</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="n">prefix</span><span class="p">,</span> <span class="n">namespace</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="AuditableStore.prefix"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.prefix">[docs]</a>    <span class="k">def</span> <span class="nf">prefix</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">namespace</span><span class="p">):</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">prefix</span><span class="p">(</span><span class="n">namespace</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="AuditableStore.namespace"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.namespace">[docs]</a>    <span class="k">def</span> <span class="nf">namespace</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">prefix</span><span class="p">):</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">namespace</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span>
</div>
<div class="viewcode-block" id="AuditableStore.namespaces"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.namespaces">[docs]</a>    <span class="k">def</span> <span class="nf">namespaces</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">namespaces</span><span class="p">()</span>
</div>
<div class="viewcode-block" id="AuditableStore.commit"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.commit">[docs]</a>    <span class="k">def</span> <span class="nf">commit</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">commit</span><span class="p">()</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span> <span class="o">=</span> <span class="p">[]</span>
</div>
<div class="viewcode-block" id="AuditableStore.rollback"><a class="viewcode-back" href="../../../../apidocs/rdflib.plugins.stores.html#rdflib.plugins.stores.auditable.AuditableStore.rollback">[docs]</a>    <span class="k">def</span> <span class="nf">rollback</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="c"># Aquire Rollback lock and apply reverse operations in the forward</span>
        <span class="c"># order</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">rollbackLock</span><span class="o">.</span><span class="n">acquire</span><span class="p">()</span>
        <span class="k">for</span> <span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">obj</span><span class="p">,</span> <span class="n">context</span><span class="p">,</span> <span class="n">op</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span><span class="p">:</span>
            <span class="k">if</span> <span class="n">op</span> <span class="o">==</span> <span class="s">&#39;add&#39;</span><span class="p">:</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">add</span><span class="p">(</span>
                    <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">obj</span><span class="p">),</span> <span class="n">Graph</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="p">,</span> <span class="n">context</span><span class="p">))</span>
            <span class="k">else</span><span class="p">:</span>
                <span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span>
                    <span class="p">(</span><span class="n">subject</span><span class="p">,</span> <span class="n">predicate</span><span class="p">,</span> <span class="n">obj</span><span class="p">),</span> <span class="n">Graph</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">store</span><span class="p">,</span> <span class="n">context</span><span class="p">))</span>

        <span class="bp">self</span><span class="o">.</span><span class="n">reverseOps</span> <span class="o">=</span> <span class="p">[]</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">rollbackLock</span><span class="o">.</span><span class="n">release</span><span class="p">()</span></div></div>
</pre></div>

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