Add an activator to the root context tests

flow-tests/test-root-context/src/main/java/com/vaadin/flow/osgi/Activator.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2000-2018 Vaadin Ltd.
+ *
+ * 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 com.vaadin.flow.osgi;
+
+import java.net.URL;
+import java.util.Enumeration;
+
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.FrameworkUtil;
+import org.osgi.framework.ServiceEvent;
+import org.osgi.framework.ServiceListener;
+import org.osgi.framework.ServiceReference;
+import org.osgi.service.http.HttpService;
+import org.osgi.service.http.NamespaceException;
+
+/**
+ * @author Vaadin Ltd
+ *
+ */
+public class Activator implements BundleActivator, ServiceListener {
+
+    @Override
+    public void start(BundleContext context) throws Exception {
+        context.addServiceListener(this);
+    }
+
+    @Override
+    public void serviceChanged(ServiceEvent event) {
+        if (event.getType() == ServiceEvent.REGISTERED) {
+            registerResources(event.getServiceReference());
+        }
+    }
+
+    private void registerResources(ServiceReference<?> serviceReference) {
+        Bundle bundle = FrameworkUtil.getBundle(Activator.class);
+        ServiceReference<HttpService> reference = bundle.getBundleContext()
+                .getServiceReference(HttpService.class);
+        if (reference != null && (serviceReference == null
+                || serviceReference.equals(reference))) {
+            HttpService service = bundle.getBundleContext()
+                    .getService(reference);
+
+            String resoursesPrefix = "/META-INF/resources";
+
+            try {
+                registerResource(service, resoursesPrefix + "/frontend",
+                        resoursesPrefix.length(), bundle);
+                registerResource(service, resoursesPrefix + "/frontend-es6",
+                        resoursesPrefix.length(), bundle);
+                service.registerResources("/include.js",
+                        resoursesPrefix + "/include.js", null);
+            } catch (NamespaceException e) {
+                throw new IllegalStateException(e);
+            }
+        }
+
+    }
+
+    private void registerResource(HttpService service, String folder,
+            int prefixLength, Bundle bundle) throws NamespaceException {
+        Enumeration<URL> entries = bundle.findEntries(folder, "*", false);
+        while (entries.hasMoreElements()) {
+            URL nextElement = entries.nextElement();
+            String file = nextElement.getFile();
+            if (file.endsWith("/")) {
+                file = file.substring(0, file.length() - 1);
+            }
+            String path = file.substring(prefixLength);
+            System.out.println("xxxxxxx " + path + ", " + file);
+            service.registerResources(path, file, null);
+        }
+    }
+
+    @Override
+    public void stop(BundleContext context) throws Exception {
+
+    }
+}