input/releases/qpid-proton-0.32.0/proton/python/examples/client.py.html.in

<h1>client.py</h1>
<div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">__future__</span> <span class="kn">import</span> <span class="n">print_function</span><span class="p">,</span> <span class="n">unicode_literals</span>
<span class="kn">import</span> <span class="nn">optparse</span>
<span class="kn">from</span> <span class="nn">proton</span> <span class="kn">import</span> <span class="n">Message</span>
<span class="kn">from</span> <span class="nn">proton.handlers</span> <span class="kn">import</span> <span class="n">MessagingHandler</span>
<span class="kn">from</span> <span class="nn">proton.reactor</span> <span class="kn">import</span> <span class="n">Container</span><span class="p">,</span> <span class="n">DynamicNodeProperties</span>

<span class="k">class</span> <span class="nc">Client</span><span class="p">(</span><span class="n">MessagingHandler</span><span class="p">):</span>
    <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">url</span><span class="p">,</span> <span class="n">requests</span><span class="p">):</span>
        <span class="nb">super</span><span class="p">(</span><span class="n">Client</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">url</span> <span class="o">=</span> <span class="n">url</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">requests</span> <span class="o">=</span> <span class="n">requests</span>

    <span class="k">def</span> <span class="nf">on_start</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">):</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">sender</span> <span class="o">=</span> <span class="n">event</span><span class="o">.</span><span class="n">container</span><span class="o">.</span><span class="n">create_sender</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">url</span><span class="p">)</span>
        <span class="bp">self</span><span class="o">.</span><span class="n">receiver</span> <span class="o">=</span> <span class="n">event</span><span class="o">.</span><span class="n">container</span><span class="o">.</span><span class="n">create_receiver</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">sender</span><span class="o">.</span><span class="n">connection</span><span class="p">,</span> <span class="kc">None</span><span class="p">,</span> <span class="n">dynamic</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>

    <span class="k">def</span> <span class="nf">next_request</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
        <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">receiver</span><span class="o">.</span><span class="n">remote_source</span><span class="o">.</span><span class="n">address</span><span class="p">:</span>
            <span class="n">req</span> <span class="o">=</span> <span class="n">Message</span><span class="p">(</span><span class="n">reply_to</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">receiver</span><span class="o">.</span><span class="n">remote_source</span><span class="o">.</span><span class="n">address</span><span class="p">,</span> <span class="n">body</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">requests</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">sender</span><span class="o">.</span><span class="n">send</span><span class="p">(</span><span class="n">req</span><span class="p">)</span>

    <span class="k">def</span> <span class="nf">on_link_opened</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">):</span>
        <span class="k">if</span> <span class="n">event</span><span class="o">.</span><span class="n">receiver</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">receiver</span><span class="p">:</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">next_request</span><span class="p">()</span>

    <span class="k">def</span> <span class="nf">on_message</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">):</span>
        <span class="nb">print</span><span class="p">(</span><span class="s2">&quot;</span><span class="si">%s</span><span class="s2"> =&gt; </span><span class="si">%s</span><span class="s2">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">requests</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="mi">0</span><span class="p">),</span> <span class="n">event</span><span class="o">.</span><span class="n">message</span><span class="o">.</span><span class="n">body</span><span class="p">))</span>
        <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">requests</span><span class="p">:</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">next_request</span><span class="p">()</span>
        <span class="k">else</span><span class="p">:</span>
            <span class="n">event</span><span class="o">.</span><span class="n">connection</span><span class="o">.</span><span class="n">close</span><span class="p">()</span>

<span class="n">REQUESTS</span><span class="o">=</span> <span class="p">[</span><span class="s2">&quot;Twas brillig, and the slithy toves&quot;</span><span class="p">,</span>
           <span class="s2">&quot;Did gire and gymble in the wabe.&quot;</span><span class="p">,</span>
           <span class="s2">&quot;All mimsy were the borogroves,&quot;</span><span class="p">,</span>
           <span class="s2">&quot;And the mome raths outgrabe.&quot;</span><span class="p">]</span>

<span class="n">parser</span> <span class="o">=</span> <span class="n">optparse</span><span class="o">.</span><span class="n">OptionParser</span><span class="p">(</span><span class="n">usage</span><span class="o">=</span><span class="s2">&quot;usage: %prog [options]&quot;</span><span class="p">,</span>
                               <span class="n">description</span><span class="o">=</span><span class="s2">&quot;Send requests to the supplied address and print responses.&quot;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_option</span><span class="p">(</span><span class="s2">&quot;-a&quot;</span><span class="p">,</span> <span class="s2">&quot;--address&quot;</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="s2">&quot;localhost:5672/examples&quot;</span><span class="p">,</span>
                  <span class="n">help</span><span class="o">=</span><span class="s2">&quot;address to which messages are sent (default </span><span class="si">%d</span><span class="s2">efault)&quot;</span><span class="p">)</span>
<span class="n">opts</span><span class="p">,</span> <span class="n">args</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">()</span>

<span class="n">Container</span><span class="p">(</span><span class="n">Client</span><span class="p">(</span><span class="n">opts</span><span class="o">.</span><span class="n">address</span><span class="p">,</span> <span class="n">args</span> <span class="ow">or</span> <span class="n">REQUESTS</span><span class="p">))</span><span class="o">.</span><span class="n">run</span><span class="p">()</span>
</pre></div>

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