Add auto config for Spring Cloud Azure Event Hub

spring-cloud-azure-autoconfigure/src/main/java/com/microsoft/azure/spring/cloud/autoconfigure/eventhub/AzureEventHubAutoConfiguration.java

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+/*
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See LICENSE in the project root for
+ * license information.
+ */
+
+package com.microsoft.azure.spring.cloud.autoconfigure.eventhub;
+
+import com.microsoft.azure.management.eventhub.EventHub;
+import com.microsoft.azure.spring.cloud.autoconfigure.context.AzureContextAutoConfiguration;
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * An auto-configuration for Event Hub
+ *
+ * @author Warren Zhu
+ */
+@Configuration
+@AutoConfigureAfter(AzureContextAutoConfiguration.class)
+@ConditionalOnClass(EventHub.class)
+@EnableConfigurationProperties(AzureEventHubProperties.class)
+@ConditionalOnProperty("spring.cloud.azure.event.hub.namespace")
+public class AzureEventHubAutoConfiguration {
+
+}

spring-cloud-azure-autoconfigure/src/main/java/com/microsoft/azure/spring/cloud/autoconfigure/eventhub/AzureEventHubProperties.java

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+/*
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See LICENSE in the project root for
+ * license information.
+ */
+
+package com.microsoft.azure.spring.cloud.autoconfigure.eventhub;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+/**
+ * @author Warren Zhu
+ */
+@ConfigurationProperties("spring.cloud.azure.event.hub")
+public class AzureEventHubProperties {
+    private String namespace;
+
+    public String getNamespace() {
+        return namespace;
+    }
+
+    public void setNamespace(String namespace) {
+        this.namespace = namespace;
+    }
+}