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- /*
- * 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.osgi.resources;
-
- import org.osgi.framework.BundleActivator;
- import org.osgi.framework.BundleContext;
- import org.osgi.framework.ServiceReference;
- import org.osgi.util.tracker.ServiceTracker;
-
- /**
- * {@link BundleActivator} used to provide access to the
- * {@link VaadinResourceService} singleton for publishing themes, widgetsets and
- * other necessary resources.
- *
- * @author Vaadin Ltd.
- *
- * @since 8.1
- * @deprecated use OSGi DS services to bind a instance of
- * {@link VaadinResourceService}
- */
- public class OsgiVaadinResources implements BundleActivator {
-
- /**
- * Thrown if a method is called when the Resource bundle is not active.
- *
- * @author Vaadin Ltd.
- *
- * @since 8.1
- */
- @SuppressWarnings("serial")
- public static class ResourceBundleInactiveException extends Exception {
- public ResourceBundleInactiveException(String message) {
- super(message);
- }
- }
-
- private static OsgiVaadinResources instance;
-
- private ServiceTracker<VaadinResourceService, VaadinResourceService> vaadinResourceTracker;
- private VaadinResourceService service;
-
- /**
- * Returns the {@link VaadinResourceService} instance. Always returns
- * non-null.
- *
- * @return the {@link VaadinResourceService resource service} to use for
- * publishing themes, widgetsets and other necessary resources
- * @throws ResourceBundleInactiveException
- * if the bundle is not active
- */
- public static VaadinResourceService getService()
- throws ResourceBundleInactiveException {
- if (instance == null) {
- throw new ResourceBundleInactiveException(
- "Vaadin Shared is not active!");
- }
- return instance.service;
- }
-
- @Override
- public void start(BundleContext context) throws Exception {
- vaadinResourceTracker = new ServiceTracker<VaadinResourceService, VaadinResourceService>(
- context, VaadinResourceService.class, null) {
- @Override
- public VaadinResourceService addingService(
- ServiceReference<VaadinResourceService> reference) {
- VaadinResourceService vaadinService = super.addingService(
- reference);
- service = vaadinService;
- return vaadinService;
- }
-
- @Override
- public void removedService(
- ServiceReference<VaadinResourceService> reference,
- VaadinResourceService service) {
- super.removedService(reference, service);
- if (OsgiVaadinResources.this.service == service) {
- OsgiVaadinResources.this.service = null;
- }
- }
- };
- vaadinResourceTracker.open();
- instance = this;
- }
-
- @Override
- public void stop(BundleContext context) throws Exception {
- if (vaadinResourceTracker != null) {
- vaadinResourceTracker.close();
- }
- vaadinResourceTracker = null;
- instance = null;
- service = null;
- }
- }
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