Create ConnectionEventProducer for HTTP adapter.

Otherwise the HTTP adapter does not start due to unsatisfied Spring
bean dependencies. Providing it as already done for the MQTT adapter
fixes it and should offer the same feature for HTTP too.

Signed-off-by: Karsten Frank <Karsten.Frank@bosch-si.com>

adapters/http-vertx/src/main/java/org/eclipse/hono/adapter/http/vertx/Config.java

@@ -17,6 +17,8 @@
 import org.eclipse.hono.config.ApplicationConfigProperties;
 import org.eclipse.hono.config.ClientConfigProperties;
 import org.eclipse.hono.service.AbstractAdapterConfig;
+import org.eclipse.hono.service.monitoring.ConnectionEventProducer;
+import org.eclipse.hono.service.monitoring.LoggingConnectionEventProducer;
 import org.springframework.beans.factory.config.ObjectFactoryCreatingFactoryBean;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.context.annotation.Bean;
@@ -97,4 +99,17 @@ public ObjectFactoryCreatingFactoryBean serviceFactory() {
         factory.setTargetBeanName(BEAN_NAME_VERTX_BASED_HTTP_PROTOCOL_ADAPTER);
         return factory;
     }
+
+    /**
+     * Exposes the connection event producer implementation.
+     * <p>
+     * This defaults to a {@link LoggingConnectionEventProducer} which logs to the default level.
+     *
+     * @return The connection event producer.
+     */
+    @Bean
+    public ConnectionEventProducer connectionEventProducer() {
+        return new LoggingConnectionEventProducer();
+    }
+
 }