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    <a href="https://reviewboard.asterisk.org/r/3025/diff/1/?file=48549#file48549line34" style="color: black; font-weight: bold; text-decoration: underline;">branches/12/res/res_stasis_device_state.c</a>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#define DEVICE_STATE_SIZE 256</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This could probably stand to be a lot smaller (like 64 maybe)</pre>
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    <a href="https://reviewboard.asterisk.org/r/3025/diff/1/?file=48549#file48549line142" style="color: black; font-weight: bold; text-decoration: underline;">branches/12/res/res_stasis_device_state.c</a>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">   </span><span class="n">RAII_VAR</span><span class="p">(</span><span class="k">struct</span> <span class="n">device_state_subscription</span> <span class="o">*</span><span class="p">,</span> <span class="n">sub</span><span class="p">,</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">143</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">   </span><span class="tb">  </span> <span class="n">device_state_subscription_create</span><span class="p">(</span><span class="n">app</span><span class="p">,</span> <span class="n">name</span><span class="p">),</span> <span class="n">ao2_cleanup</span><span class="p">);</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">   </span><span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">sub</span><span class="p">)</span> <span class="p">{</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">   </span><span class="tb">  </span><span class="k">return</span> <span class="nb">NULL</span><span class="p">;</span></pre></td>
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    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">149</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">   </span><span class="k">return</span> <span class="n">ao2_find</span><span class="p">(</span><span class="n">device_state_subscriptions</span><span class="p">,</span> <span class="n">sub</span><span class="p">,</span> <span class="n">OBJ_SEARCH_OBJECT</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Instead of constructing a device_state_subscription and searching by OBJ_SEARCH_OBJECT, just use the name that was passed in and search by OBJ_SEARCH_KEY. That way, you save the overhead of the creation and destruction of an ao2_object whenever this function is called.</pre>
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    <a href="https://reviewboard.asterisk.org/r/3025/diff/1/?file=48549#file48549line155" style="color: black; font-weight: bold; text-decoration: underline;">branches/12/res/res_stasis_device_state.c</a>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">   </span><span class="n">ao2_unlink_flags</span><span class="p">(</span><span class="n">device_state_subscriptions</span><span class="p">,</span> <span class="n">sub</span><span class="p">,</span> <span class="n">OBJ_SEARCH_OBJECT</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">ao2_unlink_flags() ignores any OBJ_SEARCH_* flags that are passed into it. You can just use ao2_unlink() here instead.</pre>
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    <a href="https://reviewboard.asterisk.org/r/3025/diff/1/?file=48549#file48549line329" style="color: black; font-weight: bold; text-decoration: underline;">branches/12/res/res_stasis_device_state.c</a>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">329</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">   </span><span class="n">RAII_VAR</span><span class="p">(</span><span class="k">struct</span> <span class="n">device_state_subscription</span> <span class="o">*</span><span class="p">,</span> <span class="n">sub</span><span class="p">,</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">330</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">   </span><span class="tb">  </span> <span class="n">find_device_state_subscription</span><span class="p">(</span><span class="n">app</span><span class="p">,</span> <span class="n">name</span><span class="p">),</span> <span class="n">ao2_cleanup</span><span class="p">);</span></pre></td>
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    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
    <th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">331</font></th>
    <td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb">   </span><span class="n">remove_device_state_subscription</span><span class="p">(</span><span class="n">sub</span><span class="p">);</span></pre></td>
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<pre style="margin-left: 2em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">You could save some cycles here by just calling 

ao2_find(device_state_subscriptions, name, OBJ_SEARCH_KEY | OBJ_UNLINK | OBJ_NODATA);</pre>
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<p>- Mark Michelson</p>


<br />
<p>On November 21st, 2013, 7:12 p.m. UTC, Kevin Harwell wrote:</p>








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<div>Review request for Asterisk Developers, David Lee and Matt Jordan.</div>
<div>By Kevin Harwell.</div>


<p style="color: grey;"><i>Updated Nov. 21, 2013, 7:12 p.m.</i></p>







<div style="margin-top: 1.5em;">
 <b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>


 <a href="https://issues.asterisk.org/jira/browse/ASTERISK-22838">ASTERISK-22838</a>


</div>



<div style="margin-top: 1.5em;">
 <b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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   <pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Created a data model and implemented functionality for an ARI device state resource.  The following operations have been added that allow a user to manipulate an ARI controlled device:

PUT    /device-states/{deviceName}&{deviceState} - Create/Change the state of an ARI controlled device
GET    /device-states/{deviceName} - Retrieve the current state of a device
DELETE /device-states/{deviceName} - Destroy a device-state controlled by ARI

The ARI controlled device must begin with 'Stasis:'.  An example controlled device name would be Stasis:Example.

A 'DeviceStateChanged' event has also been added so that an application can subscribe and receive device change events.  Any device state, ARI controlled or not, can be subscribed to.

While adding the event, the underlying subscription control mechanism was refactored so that all current and future resource subscriptions would be the same.  Each event resource must now register itself in order to be able to properly handle [un]subscribes.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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   <pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Some basic testing done using the swagger framework and a websocket connection.  Testing adding, changing, and removing device state with regards to an ARI controlled device were successful.  Also tested [un]subscribing to the events from device with success.  Planning on writing some testsuite test cases as well.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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 <li>branches/12/rest-api/resources.json <span style="color: grey">(402955)</span></li>

 <li>branches/12/rest-api/api-docs/events.json <span style="color: grey">(402955)</span></li>

 <li>branches/12/rest-api/api-docs/deviceStates.json <span style="color: grey">(PRE-CREATION)</span></li>

 <li>branches/12/rest-api/api-docs/applications.json <span style="color: grey">(402955)</span></li>

 <li>branches/12/res/stasis/app.c <span style="color: grey">(402955)</span></li>

 <li>branches/12/res/res_stasis_device_state.exports.in <span style="color: grey">(PRE-CREATION)</span></li>

 <li>branches/12/res/res_stasis_device_state.c <span style="color: grey">(PRE-CREATION)</span></li>

 <li>branches/12/res/res_stasis.c <span style="color: grey">(402955)</span></li>

 <li>branches/12/res/res_ari_deviceStates.c <span style="color: grey">(PRE-CREATION)</span></li>

 <li>branches/12/res/ari/resource_deviceStates.c <span style="color: grey">(PRE-CREATION)</span></li>

 <li>branches/12/res/ari/resource_deviceStates.h <span style="color: grey">(PRE-CREATION)</span></li>

 <li>branches/12/res/ari/resource_applications.h <span style="color: grey">(402955)</span></li>

 <li>branches/12/res/ari/ari_model_validators.c <span style="color: grey">(402955)</span></li>

 <li>branches/12/res/ari/ari_model_validators.h <span style="color: grey">(402955)</span></li>

 <li>branches/12/res/ari.make <span style="color: grey">(402955)</span></li>

 <li>branches/12/main/devicestate.c <span style="color: grey">(402955)</span></li>

 <li>branches/12/include/asterisk/stasis_app_device_state.h <span style="color: grey">(PRE-CREATION)</span></li>

 <li>branches/12/include/asterisk/stasis_app.h <span style="color: grey">(402955)</span></li>

 <li>branches/12/include/asterisk/devicestate.h <span style="color: grey">(402955)</span></li>

</ul>

<p><a href="https://reviewboard.asterisk.org/r/3025/diff/" style="margin-left: 3em;">View Diff</a></p>







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