| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.cxf.dosgi.common.httpservice; |
| |
| import java.util.Collections; |
| import java.util.Dictionary; |
| import java.util.HashMap; |
| import java.util.Hashtable; |
| import java.util.Map; |
| |
| import org.apache.cxf.Bus; |
| import org.apache.cxf.transport.http.DestinationRegistry; |
| import org.apache.cxf.transport.http.DestinationRegistryImpl; |
| import org.apache.cxf.transport.servlet.CXFNonSpringServlet; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.Filter; |
| import org.osgi.framework.InvalidSyntaxException; |
| import org.osgi.framework.ServiceEvent; |
| import org.osgi.framework.ServiceException; |
| import org.osgi.framework.ServiceListener; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.service.component.ComponentContext; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.http.HttpContext; |
| import org.osgi.service.http.HttpService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Component // |
| (// |
| name = "org.apache.cxf.dosgi.http", // |
| service = HttpServiceManager.class // |
| ) |
| public class HttpServiceManager { |
| /** |
| * Prefix to create an absolute URL from a relative URL. See HttpServiceManager.getAbsoluteAddress |
| * Defaults to: http://localhost:8181 |
| */ |
| public static final String KEY_HTTP_BASE = "httpBase"; |
| public static final String KEY_CXF_SERVLET_ALIAS = "cxfServletAlias"; |
| public static final String DEFAULT_CXF_SERVLET_ALIAS = "/cxf"; |
| private static final Logger LOG = LoggerFactory.getLogger(HttpServiceManager.class); |
| |
| private Map<Long, String> exportedAliases = Collections.synchronizedMap(new HashMap<Long, String>()); |
| private String httpBase; |
| private String cxfServletAlias; |
| private HttpService httpService; |
| private BundleContext context; |
| |
| @Activate |
| public void activate(ComponentContext compContext) { |
| Dictionary<String, Object> config = compContext.getProperties(); |
| initFromConfig(config); |
| this.context = compContext.getBundleContext(); |
| } |
| |
| public void initFromConfig(Dictionary<String, Object> config) { |
| if (config == null) { |
| config = new Hashtable<>(); |
| } |
| this.httpBase = getWithDefault(config.get(KEY_HTTP_BASE), "http://localhost:8181"); |
| this.cxfServletAlias = getWithDefault(config.get(KEY_CXF_SERVLET_ALIAS), "/cxf"); |
| } |
| |
| private String getWithDefault(Object value, String defaultValue) { |
| return value == null ? defaultValue : value.toString(); |
| } |
| |
| public Bus registerServlet(Bus bus, String contextRoot, BundleContext callingContext, Long sid) { |
| bus.setExtension(new DestinationRegistryImpl(), DestinationRegistry.class); |
| CXFNonSpringServlet cxf = new CXFNonSpringServlet(); |
| cxf.setBus(bus); |
| try { |
| HttpContext httpContext1 = httpService.createDefaultHttpContext(); |
| HttpContext httpContext = new SecurityDelegatingHttpContext(callingContext, httpContext1); |
| httpService.registerServlet(contextRoot, cxf, new Hashtable<String, String>(), httpContext); |
| |
| registerUnexportHook(sid, contextRoot); |
| |
| LOG.info("Successfully registered CXF DOSGi servlet at " + contextRoot); |
| } catch (Exception e) { |
| throw new ServiceException("CXF DOSGi: problem registering CXF HTTP Servlet", e); |
| } |
| return bus; |
| } |
| |
| /** |
| * This listens for service removal events and "un-exports" the service from the HttpService. |
| * |
| * @param sref the service reference to track |
| * @param alias the HTTP servlet context alias |
| */ |
| private void registerUnexportHook(Long sid, String alias) { |
| LOG.debug("Registering service listener for service with ID {}", sid); |
| |
| String previous = exportedAliases.put(sid, alias); |
| if (previous != null) { |
| LOG.warn("Overwriting service export for service with ID {}", sid); |
| } |
| |
| try { |
| Filter f = context.createFilter("(" + org.osgi.framework.Constants.SERVICE_ID + "=" + sid + ")"); |
| if (f != null) { |
| context.addServiceListener(new UnregisterListener(), f.toString()); |
| } else { |
| LOG.warn("Service listener could not be started. The service will not be automatically unexported."); |
| } |
| } catch (InvalidSyntaxException e) { |
| LOG.warn("Service listener could not be started. The service will not be automatically unexported.", |
| e); |
| } |
| } |
| |
| public String getDefaultAddress(Class<?> type) { |
| return "/" + type.getName().replace('.', '/'); |
| } |
| |
| public String getAbsoluteAddress(String contextRoot, String endpointAddress) { |
| if (endpointAddress.startsWith("http")) { |
| return endpointAddress; |
| } |
| String effContextRoot = contextRoot == null ? cxfServletAlias : contextRoot; |
| return this.httpBase + effContextRoot + endpointAddress; |
| } |
| |
| private final class UnregisterListener implements ServiceListener { |
| |
| @Override |
| public void serviceChanged(ServiceEvent event) { |
| if (!(event.getType() == ServiceEvent.UNREGISTERING)) { |
| return; |
| } |
| final ServiceReference<?> sref = event.getServiceReference(); |
| final Long sid = (Long)sref.getProperty(org.osgi.framework.Constants.SERVICE_ID); |
| final String alias = exportedAliases.remove(sid); |
| if (alias == null) { |
| LOG.error("Unable to unexport HTTP servlet for service class '{}'," |
| + " service-id {}: no servlet alias found", |
| sref.getProperty(org.osgi.framework.Constants.OBJECTCLASS), sid); |
| return; |
| } |
| LOG.debug("Unexporting HTTP servlet for alias '{}'", alias); |
| try { |
| httpService.unregister(alias); |
| } catch (Exception e) { |
| LOG.warn("An exception occurred while unregistering service for HTTP servlet alias '{}'", |
| alias, e); |
| } |
| } |
| } |
| |
| public void setContext(BundleContext context) { |
| this.context = context; |
| } |
| |
| @Reference |
| public void setHttpService(HttpService httpService) { |
| this.httpService = httpService; |
| } |
| } |