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<div class="section" id="transitioning-from-python-gearman-1-x-to-2-0-0">
<h1>2. Transitioning from python-gearman 1.x to 2.0.0<a class="headerlink" href="#transitioning-from-python-gearman-1-x-to-2-0-0" title="Permalink to this headline">¶</a></h1>
<div class="section" id="client-single-task">
<h2>2.1. Client (single task)<a class="headerlink" href="#client-single-task" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python"><div class="highlight"><pre><span class="c"># python-gearman 1.x</span>
<span class="n">old_client</span> <span class="o">=</span> <span class="n">gearman</span><span class="o">.</span><span class="n">GearmanClient</span><span class="p">([</span><span class="s">'localhost:4730'</span><span class="p">])</span>
<span class="n">old_result</span> <span class="o">=</span> <span class="n">old_client</span><span class="o">.</span><span class="n">do_task</span><span class="p">(</span><span class="n">Task</span><span class="p">(</span><span class="s">"echo"</span><span class="p">,</span> <span class="s">"foo"</span><span class="p">))</span>
<span class="c"># python-gearman 2.x</span>
<span class="n">new_client</span> <span class="o">=</span> <span class="n">gearman</span><span class="o">.</span><span class="n">GearmanClient</span><span class="p">([</span><span class="s">'localhost:4730'</span><span class="p">])</span>
<span class="n">current_request</span> <span class="o">=</span> <span class="n">new_client</span><span class="o">.</span><span class="n">submit_job</span><span class="p">(</span><span class="s">'echo'</span><span class="p">,</span> <span class="s">'foo'</span><span class="p">)</span>
<span class="n">new_result</span> <span class="o">=</span> <span class="n">current_request</span><span class="o">.</span><span class="n">result</span>
</pre></div>
</div>
</div>
<div class="section" id="client-multiple-tasks">
<h2>2.2. Client (multiple tasks)<a class="headerlink" href="#client-multiple-tasks" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python"><div class="highlight"><pre><span class="c"># python-gearman 1.x</span>
<span class="n">old_client</span> <span class="o">=</span> <span class="n">gearman</span><span class="o">.</span><span class="n">GearmanClient</span><span class="p">([</span><span class="s">'localhost:4730'</span><span class="p">])</span>
<span class="n">ts</span> <span class="o">=</span> <span class="n">Taskset</span><span class="p">([</span>
<span class="n">Task</span><span class="p">(</span><span class="n">func</span><span class="o">=</span><span class="s">"echo"</span><span class="p">,</span> <span class="n">arg</span><span class="o">=</span><span class="s">"foo"</span><span class="p">),</span>
<span class="n">Task</span><span class="p">(</span><span class="n">func</span><span class="o">=</span><span class="s">"echo"</span><span class="p">,</span> <span class="n">arg</span><span class="o">=</span><span class="s">"bar"</span><span class="p">),</span>
<span class="p">])</span>
<span class="n">old_client</span><span class="o">.</span><span class="n">do_taskset</span><span class="p">(</span><span class="n">ts</span><span class="p">)</span>
<span class="k">for</span> <span class="n">task</span> <span class="ow">in</span> <span class="n">ts</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
<span class="k">assert</span> <span class="n">task</span><span class="o">.</span><span class="n">result</span> <span class="o">==</span> <span class="n">task</span><span class="o">.</span><span class="n">arg</span>
<span class="c"># python-gearman 2.x</span>
<span class="n">new_client</span> <span class="o">=</span> <span class="n">gearman</span><span class="o">.</span><span class="n">GearmanClient</span><span class="p">([</span><span class="s">'localhost:4730'</span><span class="p">])</span>
<span class="n">new_jobs</span> <span class="o">=</span> <span class="p">[</span>
<span class="nb">dict</span><span class="p">(</span><span class="n">task</span><span class="o">=</span><span class="s">'echo'</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="s">'foo'</span><span class="p">),</span>
<span class="nb">dict</span><span class="p">(</span><span class="n">task</span><span class="o">=</span><span class="s">'echo'</span><span class="p">,</span> <span class="n">data</span><span class="o">=</span><span class="s">'bar'</span><span class="p">),</span>
<span class="p">]</span>
<span class="n">completed_requests</span> <span class="o">=</span> <span class="n">new_client</span><span class="o">.</span><span class="n">submit_multiple_jobs</span><span class="p">(</span><span class="n">new_jobs</span><span class="p">)</span>
<span class="k">for</span> <span class="n">current_request</span> <span class="ow">in</span> <span class="n">completed_requests</span><span class="p">:</span>
<span class="k">assert</span> <span class="n">current_request</span><span class="o">.</span><span class="n">result</span> <span class="o">==</span> <span class="n">current_request</span><span class="o">.</span><span class="n">job</span><span class="o">.</span><span class="n">data</span>
</pre></div>
</div>
</div>
<div class="section" id="worker">
<h2>2.3. Worker<a class="headerlink" href="#worker" title="Permalink to this headline">¶</a></h2>
<div class="highlight-python"><div class="highlight"><pre><span class="c"># python-gearman 1.x</span>
<span class="k">class</span> <span class="nc">WorkerHook</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">start</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">current_job</span><span class="p">):</span>
<span class="k">print</span> <span class="s">"Job started"</span>
<span class="k">def</span> <span class="nf">fail</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">current_job</span><span class="p">,</span> <span class="n">exc_info</span><span class="p">):</span>
<span class="k">print</span> <span class="s">"Job failed, can't stop last gasp GEARMAN_COMMAND_WORK_FAIL"</span>
<span class="k">def</span> <span class="nf">complete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">current_job</span><span class="p">,</span> <span class="n">result</span><span class="p">):</span>
<span class="k">print</span> <span class="s">"Job complete, can't stop last gasp GEARMAN_COMMAND_WORK_COMPLETE"</span>
<span class="k">def</span> <span class="nf">callback_fxn</span><span class="p">(</span><span class="n">idle</span><span class="p">,</span> <span class="n">last_job_time</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">False</span>
<span class="n">old_worker</span> <span class="o">=</span> <span class="n">gearman</span><span class="o">.</span><span class="n">GearmanWorker</span><span class="p">([</span><span class="s">'localhost:4730'</span><span class="p">])</span>
<span class="n">old_worker</span><span class="o">.</span><span class="n">register_function</span><span class="p">(</span><span class="s">"echo"</span><span class="p">,</span> <span class="k">lambda</span> <span class="n">job</span><span class="p">:</span><span class="n">job</span><span class="o">.</span><span class="n">arg</span><span class="p">)</span>
<span class="n">old_worker</span><span class="o">.</span><span class="n">work</span><span class="p">(</span><span class="n">stop_if</span><span class="o">=</span><span class="n">callback_fxn</span><span class="p">,</span> <span class="n">hooks</span><span class="o">=</span><span class="n">WorkerHook</span><span class="p">())</span>
<span class="c"># python-gearman 2.x</span>
<span class="k">class</span> <span class="nc">CustomGearmanWorker</span><span class="p">(</span><span class="n">gearman</span><span class="o">.</span><span class="n">GearmanWorker</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">on_job_execute</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">current_job</span><span class="p">):</span>
<span class="k">print</span> <span class="s">"Job started"</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">CustomGearmanWorker</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">on_job_execute</span><span class="p">(</span><span class="n">current_job</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">on_job_exception</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">current_job</span><span class="p">,</span> <span class="n">exc_info</span><span class="p">):</span>
<span class="k">print</span> <span class="s">"Job failed, CAN stop last gasp GEARMAN_COMMAND_WORK_FAIL"</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">CustomGearmanWorker</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">on_job_exception</span><span class="p">(</span><span class="n">current_job</span><span class="p">,</span> <span class="n">exc_info</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">on_job_complete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">current_job</span><span class="p">,</span> <span class="n">job_result</span><span class="p">):</span>
<span class="k">print</span> <span class="s">"Job failed, CAN stop last gasp GEARMAN_COMMAND_WORK_FAIL"</span>
<span class="k">return</span> <span class="nb">super</span><span class="p">(</span><span class="n">CustomGearmanWorker</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">send_job_complete</span><span class="p">(</span><span class="n">current_job</span><span class="p">,</span> <span class="n">job_result</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">after_poll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">any_activity</span><span class="p">):</span>
<span class="c"># Return True if you want to continue polling, replaces callback_fxn</span>
<span class="k">return</span> <span class="bp">True</span>
<span class="k">def</span> <span class="nf">task_callback</span><span class="p">(</span><span class="n">gearman_worker</span><span class="p">,</span> <span class="n">job</span><span class="p">):</span>
<span class="k">return</span> <span class="n">job</span><span class="o">.</span><span class="n">data</span>
<span class="n">new_worker</span> <span class="o">=</span> <span class="n">CustomGearmanWorker</span><span class="p">([</span><span class="s">'localhost:4730'</span><span class="p">])</span>
<span class="n">new_worker</span><span class="o">.</span><span class="n">register_task</span><span class="p">(</span><span class="s">"echo"</span><span class="p">,</span> <span class="n">task_callback</span><span class="p">)</span>
<span class="n">new_worker</span><span class="o">.</span><span class="n">work</span><span class="p">()</span>
</pre></div>
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<h3><a href="index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">2. Transitioning from python-gearman 1.x to 2.0.0</a><ul>
<li><a class="reference internal" href="#client-single-task">2.1. Client (single task)</a></li>
<li><a class="reference internal" href="#client-multiple-tasks">2.2. Client (multiple tasks)</a></li>
<li><a class="reference internal" href="#worker">2.3. Worker</a></li>
</ul>
</li>
</ul>
<h4>Previous topic</h4>
<p class="topless"><a href="job.html"
title="previous chapter">1.4. <tt class="docutils literal"><span class="pre">gearman.job</span></tt> — Gearman job definitions</a></p>
<h4>Next topic</h4>
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