/*
* Copyright 2000-2016 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.impl;
import java.io.IOException;
import java.net.URL;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceReference;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.osgi.service.component.annotations.ReferenceCardinality;
import org.osgi.service.component.annotations.ReferencePolicy;
import org.osgi.service.http.HttpContext;
import org.osgi.service.http.HttpService;
import org.osgi.service.http.NamespaceException;
import com.vaadin.osgi.resources.OSGiVaadinResources;
import com.vaadin.osgi.resources.OSGiVaadinResources.ResourceBundleInactiveException;
import com.vaadin.osgi.resources.OSGiVaadinTheme;
import com.vaadin.osgi.resources.OSGiVaadinWidgetset;
import com.vaadin.osgi.resources.VaadinResourceService;
/**
* Tracks {@link OSGiVaadinWidgetset} and {@link OSGiVaadinTheme} registration
* and uses {@link HttpService} to register them.
*
* @author Vaadin Ltd.
*
* @since 8.1
*/
@Component(immediate = true)
public class VaadinResourceTrackerComponent {
private HttpService httpService;
private Map<Long, String> themeToAlias = Collections
.synchronizedMap(new LinkedHashMap<>());
private Map<Long, String> widgetsetToAlias = Collections
.synchronizedMap(new LinkedHashMap<>());
@Reference(cardinality = ReferenceCardinality.MULTIPLE, service = OSGiVaadinTheme.class, policy = ReferencePolicy.DYNAMIC)
void bindTheme(ServiceReference<OSGiVaadinTheme> themeRef)
throws ResourceBundleInactiveException, NamespaceException {
Bundle bundle = themeRef.getBundle();
BundleContext context = bundle.getBundleContext();
OSGiVaadinTheme theme = context.getService(themeRef);
if (theme == null)
return;
VaadinResourceService resourceService = OSGiVaadinResources
.getService();
try {
String pathPrefix = resourceService.getResourcePathPrefix();
Long serviceId = (Long) themeRef.getProperty(Constants.SERVICE_ID);
String alias = PathFormatHelper.getThemeAlias(theme.getName(),
pathPrefix);
String path = PathFormatHelper.getThemePath(theme.getName());
httpService.registerResources(alias, path,
new Delegate(httpService, bundle));
themeToAlias.put(serviceId, alias);
} finally {
context.ungetService(themeRef);
}
}
void unbindTheme(ServiceReference<OSGiVaadinTheme> themeRef) {
Long serviceId = (Long) themeRef.getProperty(Constants.SERVICE_ID);
String themeAlias = themeToAlias.remove(serviceId);
if (themeAlias != null && httpService != null) {
httpService.unregister(themeAlias);
}
}
@Reference(cardinality = ReferenceCardinality.MULTIPLE, service = OSGiVaadinWidgetset.class, policy = ReferencePolicy.DYNAMIC)
void bindWidgetset(ServiceReference<OSGiVaadinWidgetset> widgetsetRef)
throws ResourceBundleInactiveException, NamespaceException {
Bundle bundle = widgetsetRef.getBundle();
BundleContext context = bundle.getBundleContext();
OSGiVaadinWidgetset widgetset = context.getService(widgetsetRef);
if (widgetset == null)
return;
VaadinResourceService service = OSGiVaadinResources.getService();
try {
String pathPrefix = service.getResourcePathPrefix();
Long serviceId = (Long) widgetsetRef
.getProperty(Constants.SERVICE_ID);
String alias = PathFormatHelper
.getWidgetsetAlias(widgetset.getName(), pathPrefix);
String path = PathFormatHelper
.getWidgetsetPath(widgetset.getName());
httpService.registerResources(alias, path,
new Delegate(httpService, bundle));
widgetsetToAlias.put(serviceId, alias);
} finally {
context.ungetService(widgetsetRef);
}
}
void unbindWidgetset(ServiceReference<OSGiVaadinWidgetset> widgetsetRef) {
Long serviceId = (Long) widgetsetRef.getProperty(Constants.SERVICE_ID);
String widgetsetAlias = widgetsetToAlias.remove(serviceId);
if (widgetsetAlias != null && httpService != null) {
httpService.unregister(widgetsetAlias);
}
}
@Reference
void setHttpService(HttpService service) {
this.httpService = service;
}
void unsetHttpService(HttpService service) {
this.httpService = null;
}
static final class Delegate implements HttpContext {
private HttpContext context;
private Bundle bundle;
public Delegate(HttpService service, Bundle bundle) {
this.context = service.createDefaultHttpContext();
this.bundle = bundle;
}
@Override
public boolean handleSecurity(HttpServletRequest request,
HttpServletResponse response) throws IOException {
return context.handleSecurity(request, response);
}
@Override
public URL getResource(String name) {
return bundle.getResource(name);
}
@Override
public String getMimeType(String name) {
return context.getMimeType(name);
}
}
}