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| <div class="subTitle">org.apache.edgent.apps.iot</div> |
| <h2 title="Class IotDevicePubSub" class="title">Class IotDevicePubSub</h2> |
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| <li>org.apache.edgent.apps.iot.IotDevicePubSub</li> |
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| <pre>public class <span class="typeNameLabel">IotDevicePubSub</span> |
| extends <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Application sharing an <code>IotDevice</code> through publish-subscribe. <BR> |
| This application shares an <a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot"><code>IotDevice</code></a> across multiple running |
| jobs. This allows a single connection to a back-end message hub to be shared |
| across multiple independent applications, without having to build a single |
| topology. |
| <P> |
| Applications coded to <a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot"><code>IotDevice</code></a> obtain a topology specific |
| <code>IotDevice</code> using <a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#addIotDevice-org.apache.edgent.topology.TopologyElement-"><code>addIotDevice(TopologyElement)</code></a>. This returned |
| device will route events and commands to/from the actual message hub |
| <code>IotDevice</code> through publish-subscribe. |
| <P> |
| An instance of this application is created by first creating a new topology and |
| then creating a <a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot"><code>IotDevice</code></a> specific to the desired message hub. Then |
| the application is created by calling <a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#createApplication-org.apache.edgent.connectors.iot.IotDevice-"><code>createApplication(IotDevice)</code></a> |
| passing the <code>IotDevice</code>. <BR> |
| Then additional independent applications (topologies) can be created and they |
| create a proxy <code>IotDevice</code> for their topology using |
| <a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#addIotDevice-org.apache.edgent.topology.TopologyElement-"><code>addIotDevice(TopologyElement)</code></a>. This proxy <code>IotDevice</code> is then |
| used to send device events and receive device commands in that topology. <BR> |
| Once all the topologies have been declared they can be submitted. |
| </P> |
| <P> |
| At startup this application sends a single device event with |
| identifier <a href="../../../../../org/apache/edgent/connectors/iot/Events.html#IOT_START"><code>Events.IOT_START</code></a>. This performs two functions: |
| </P> |
| <UL> |
| <LI>Initiates a connection to the message hub.</LI> |
| <LI>Allows external applications to be notified (by subscribing to device events) |
| when an Edgent provider starts.</LI> |
| </UL></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/edgent/connectors/pubsub/PublishSubscribe.html" title="class in org.apache.edgent.connectors.pubsub"><code>PublishSubscribe</code></a></dd> |
| </dl> |
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| <h3>Field Summary</h3> |
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| <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#APP_NAME">APP_NAME</a></span></code> |
| <div class="block">IotDevicePubSub application name.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#COMMANDS_TOPIC">COMMANDS_TOPIC</a></span></code> |
| <div class="block">Device commands are published to "edgent/iot/commands" by |
| this application.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#EVENTS_TOPIC">EVENTS_TOPIC</a></span></code> |
| <div class="block">Events published to topic "edgent/iot/events" are sent as device events using the |
| actual message hub <a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot"><code>IotDevice</code></a>.</div> |
| </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#IotDevicePubSub--">IotDevicePubSub</a></span>()</code> </td> |
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| <td class="colFirst"><code>static <a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot">IotDevice</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#addIotDevice-org.apache.edgent.topology.TopologyElement-">addIotDevice</a></span>(<a href="../../../../../org/apache/edgent/topology/TopologyElement.html" title="interface in org.apache.edgent.topology">TopologyElement</a> te)</code> |
| <div class="block">Add a proxy <code>IotDevice</code> for the topology containing <code>te</code>.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#createApplication-org.apache.edgent.connectors.iot.IotDevice-">createApplication</a></span>(<a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot">IotDevice</a> device)</code> |
| <div class="block">Create an instance of this application using <code>device</code> as the device |
| connection to a message hub.</div> |
| </td> |
| </tr> |
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| <code><a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
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| <div class="details"> |
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| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a name="APP_NAME"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>APP_NAME</h4> |
| <pre>public static final <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> APP_NAME</pre> |
| <div class="block">IotDevicePubSub application name.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../constant-values.html#org.apache.edgent.apps.iot.IotDevicePubSub.APP_NAME">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="EVENTS_TOPIC"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>EVENTS_TOPIC</h4> |
| <pre>public static final <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> EVENTS_TOPIC</pre> |
| <div class="block">Events published to topic "edgent/iot/events" are sent as device events using the |
| actual message hub <a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot"><code>IotDevice</code></a>. <BR> |
| it is recommended applications use the <code>IotDevice</code> returned by |
| <a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#addIotDevice-org.apache.edgent.topology.TopologyElement-"><code>addIotDevice(TopologyElement)</code></a> to send events rather than |
| publishing streams to this topic.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../constant-values.html#org.apache.edgent.apps.iot.IotDevicePubSub.EVENTS_TOPIC">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="COMMANDS_TOPIC"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>COMMANDS_TOPIC</h4> |
| <pre>public static final <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> COMMANDS_TOPIC</pre> |
| <div class="block">Device commands are published to "edgent/iot/commands" by |
| this application. <BR> |
| it is recommended applications use the <code>IotDevice</code> returned by |
| <a href="../../../../../org/apache/edgent/apps/iot/IotDevicePubSub.html#addIotDevice-org.apache.edgent.topology.TopologyElement-"><code>addIotDevice(TopologyElement)</code></a> to receive commands rather than |
| subscribing to streams with this topic prefix.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../constant-values.html#org.apache.edgent.apps.iot.IotDevicePubSub.COMMANDS_TOPIC">Constant Field Values</a></dd> |
| </dl> |
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| <a name="IotDevicePubSub--"> |
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| <ul class="blockListLast"> |
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| <h4>IotDevicePubSub</h4> |
| <pre>public IotDevicePubSub()</pre> |
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| <h4>createApplication</h4> |
| <pre>public static void createApplication(<a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot">IotDevice</a> device)</pre> |
| <div class="block">Create an instance of this application using <code>device</code> as the device |
| connection to a message hub.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>device</code> - the IotDevice</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="addIotDevice-org.apache.edgent.topology.TopologyElement-"> |
| <!-- --> |
| </a> |
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| <h4>addIotDevice</h4> |
| <pre>public static <a href="../../../../../org/apache/edgent/connectors/iot/IotDevice.html" title="interface in org.apache.edgent.connectors.iot">IotDevice</a> addIotDevice(<a href="../../../../../org/apache/edgent/topology/TopologyElement.html" title="interface in org.apache.edgent.topology">TopologyElement</a> te)</pre> |
| <div class="block">Add a proxy <code>IotDevice</code> for the topology containing <code>te</code>. |
| <P> |
| Any events sent through the returned device are sent onto the message hub |
| device through publish-subscribe. <BR> |
| Subscribing to commands using the returned device will subscribe to |
| commands received by the message hub device. |
| </P></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>te</code> - Topology the returned device is contained in.</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Proxy device.</dd> |
| </dl> |
| </li> |
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