Introduce new property for enabling HTTP/2

Author: pvorb

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java

@@ -31,6 +31,7 @@
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.boot.context.properties.NestedConfigurationProperty;
 import org.springframework.boot.web.server.Compression;
+import org.springframework.boot.web.server.Http2;
 import org.springframework.boot.web.server.Ssl;
 import org.springframework.boot.web.servlet.server.Jsp;
 import org.springframework.util.Assert;
@@ -50,6 +51,7 @@
  * @author Aurélien Leboulanger
  * @author Brian Clozel
  * @author Olivier Lamy
+ * @author Paul Vorbach
  */
 @ConfigurationProperties(prefix = "server", ignoreUnknownFields = true)
 public class ServerProperties {
@@ -102,6 +104,9 @@ public class ServerProperties {
 	@NestedConfigurationProperty
 	private Compression compression = new Compression();
 
+	@NestedConfigurationProperty
+	private Http2 http2 = new Http2();
+
 	private Servlet servlet = new Servlet();
 
 	private final Tomcat tomcat = new Tomcat();
@@ -190,6 +195,14 @@ public Compression getCompression() {
 		return this.compression;
 	}
 
+	public Http2 getHttp2() {
+		return http2;
+	}
+
+	public void setHttp2(Http2 http2) {
+		this.http2 = http2;
+	}
+
 	public Servlet getServlet() {
 		return this.servlet;
 	}

spring-boot/src/main/java/org/springframework/boot/web/server/Http2.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2012-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.web.server;
+
+/**
+ * Simple server-independent abstraction for configuration of HTTP/2.
+ *
+ * @author Paul Vorbach
+ * @since 2.0.0
+ */
+public class Http2 {
+
+	/**
+	 * If HTTP/2 is enabled.
+	 */
+	private boolean enabled = false;
+
+	public boolean isEnabled() {
+		return this.enabled;
+	}
+
+	public void setEnabled(boolean enabled) {
+		this.enabled = enabled;
+	}
+
+}