Integrating mb features to IotServer

modules/distribution/src/repository/conf/event-broker.xml

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+<!--
+This is the configuration file for the carbon event broker component. this configuration file configures the various subsystems of the event
+broker component and parameters.
+-->
+<eventBrokerConfig xmlns="http://wso2.org/carbon/event/broker">
+    <eventBroker name="carbonEventBroker" class="org.wso2.carbon.andes.event.core.internal.CarbonEventBrokerFactory">
+
+        <!-- topic manager implementation class.-->
+        <topicManager name="TopicManager"
+                      class="org.wso2.carbon.andes.event.core.internal.subscription.registry.RegistryTopicManagerServiceFactory">
+            <!-- root node of the topic tree -->
+            <topicStoragePath>event/topics</topicStoragePath>
+        </topicManager>
+
+        <!-- subscription manager implementation. subscription manager persist the
+        subscriptions at the registry.  users can configure the topics root node and the topicIndex path -->
+        <subscriptionManager name="subscriptionManager"
+                             class="org.wso2.carbon.andes.event.core.internal.subscription.registry.RegistrySubscriptionManagerFactory">
+            <topicStoragePath>event/topics</topicStoragePath>
+            <indexStoragePath>event/topicIndex</indexStoragePath>
+        </subscriptionManager>
+
+        <!-- delivery manager implementation. delivery manager does actual delivery part of the event broker -->
+        <deliveryManager name="deliveryManager"
+                         class="org.wso2.carbon.andes.event.core.internal.delivery.jms.QpidJMSDeliveryManagerFactory"
+                         type="local">
+            <!--  <remoteMessageBroker>
+                 <hostName>localhost</hostName>
+                 <servicePort>9443</servicePort>
+                 <webContext>/</webContext>
+                 <userName>admin</userName>
+                 <password>admin</password>
+                 <qpidPort>5672</qpidPort>
+                 <clientID>clientID</clientID>
+                 <virtualHostName>carbon</virtualHostName>
+             </remoteMessageBroker> -->
+        </deliveryManager>
+
+        <!-- when publishing an event event broker uses a separate thread pool with an executor. following parameters configure different parameters of that -->
+        <eventPublisher>
+            <minSpareThreads>5</minSpareThreads>
+            <maxThreads>50</maxThreads>
+            <maxQueuedRequests>1000</maxQueuedRequests>
+            <keepAliveTime>1000</keepAliveTime>
+        </eventPublisher>
+    </eventBroker>
+</eventBrokerConfig>