Merge pull request #156 from rwth-acis/hotfix/http2

http2 addon

webconnector/build.gradle

@@ -71,6 +71,9 @@ dependencies {
     implementation "org.webjars:swagger-ui:3.6.1"
     implementation "javax.xml.bind:jaxb-api:2.3.1"
     implementation "org.glassfish.jersey.inject:jersey-hk2:${project.property('jersey.version')}"
+    implementation "org.glassfish.grizzly:grizzly-http2:2.3.30"
+    implementation "org.glassfish.grizzly:grizzly-npn-api:1.8"
+    implementation "org.glassfish.grizzly:grizzly-npn-bootstrap:1.8.1"
 }
 
 // put all .jar files into export/jars folder

webconnector/src/main/java/i5/las2peer/connectors/webConnector/WebConnector.java

@@ -29,6 +29,8 @@
 
 import org.glassfish.grizzly.http.server.HttpServer;
 import org.glassfish.grizzly.http.server.NetworkListener;
+import org.glassfish.grizzly.http2.Http2AddOn;
+import org.glassfish.grizzly.http2.Http2Configuration;
 import org.glassfish.grizzly.nio.transport.TCPNIOTransport;
 import org.glassfish.grizzly.threadpool.ThreadPoolConfig;
 import org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpServerFactory;
@@ -421,8 +423,17 @@ public void start(Node node) throws ConnectorException {
 
 	private void startHttpServer(ResourceConfig config) throws Exception {
 		http = GrizzlyHttpServerFactory.createHttpServer(new URI("http://0.0.0.0:"+ httpPort + "/"), config, false);
+
 		final TCPNIOTransport transport = http.getListener("grizzly").getTransport();
 		transport.setWorkerThreadPoolConfig(ThreadPoolConfig.defaultConfig().setCorePoolSize(maxThreads).setMaxPoolSize(maxThreads));
+
+		// Create default HTTP/2 configuration and provide it to the AddOn
+		Http2Configuration configuration = Http2Configuration.builder().build();
+		Http2AddOn http2Addon = new Http2AddOn(configuration); 
+
+		// Register the Addon.
+		http.getListener("grizzly").registerAddOn(http2Addon);
+
 		http.start();
 		httpPort = http.getListener("grizzly").getPort();
 		logMessage("Web-Connector in HTTP mode running at " + getHttpEndpoint());