| /* |
| * 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.struts2.osgi.host; |
| |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.felix.shell.ShellService; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.BundleException; |
| import org.osgi.framework.BundleReference; |
| |
| import javax.servlet.ServletContext; |
| import java.net.URL; |
| import java.security.CodeSource; |
| import java.security.ProtectionDomain; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * A glassfish implementation of an OsgiHost |
| */ |
| public class GlassfishOSGiHost extends BaseOsgiHost implements OsgiHost { |
| |
| private static final Logger LOG = LogManager.getLogger(GlassfishOSGiHost.class); |
| |
| /** |
| * Location inside the WAR where initial bundles are located. |
| */ |
| private static final String BUNDLES_DIR = "/WEB-INF/classes/bundles/2/"; |
| |
| private BundleContext bctx = null; |
| |
| @Override |
| public void init(ServletContext servletContext) { |
| this.servletContext = servletContext; |
| |
| installManagedBundles(); |
| |
| addSpringOSGiSupport(); |
| |
| // add the bundle context to the ServletContext |
| servletContext.setAttribute(OSGI_BUNDLE_CONTEXT, bctx); |
| } |
| |
| private void installManagedBundles() { |
| try { |
| |
| // Obtaining BundleContext from ServletContext class which is loaded |
| // by bundle class loader |
| BundleReference ref = (BundleReference) servletContext.getClass() |
| .getClassLoader(); |
| bctx = ref.getBundle().getBundleContext(); |
| |
| // installing managed bundles |
| installBundles(); |
| |
| } catch (Exception ex) { |
| LOG.error("Installing Managed Bundles met a problem", ex); |
| } |
| } |
| |
| private void installBundles() throws Exception { |
| ArrayList<Bundle> installed = new ArrayList<>(); |
| for (URL url : findBundles()) { |
| if (LOG.isDebugEnabled()) { // Avoid repeated cost of URL string transform, except when debug level logging is enabled. |
| LOG.debug("Installing bundle [{}]", url); |
| } |
| Bundle bundle = bctx.installBundle(url.toExternalForm()); |
| installed.add(bundle); |
| } |
| installed.forEach(bundle -> { |
| try { |
| bundle.start(); |
| } catch (BundleException e) { |
| // Use logging to print the stacktrace (no direct stacktrace print to stdout/stderr). |
| LOG.error("Failed to start [{}]", bundle, e); |
| } |
| }); |
| |
| } |
| |
| private List<URL> findBundles() throws Exception { |
| ArrayList<URL> list = new ArrayList<>(); |
| for (Object o : this.servletContext.getResourcePaths(BUNDLES_DIR)) { |
| String name = (String) o; |
| if (name.endsWith(".jar")) { |
| URL url = this.servletContext.getResource(name); |
| if (url != null) { |
| list.add(url); |
| } |
| } |
| } |
| |
| ProtectionDomain protectionDomain = ShellService.class.getProtectionDomain(); |
| CodeSource codeSource = protectionDomain.getCodeSource(); |
| URL loc = codeSource.getLocation(); |
| list.add(loc); |
| |
| return list; |
| } |
| |
| @Override |
| protected void addSpringOSGiSupport() { |
| // see the javadoc for |
| // org.springframework.osgi.web.context.support.OsgiBundleXmlWebApplicationContext |
| // for more details |
| // OsgiBundleXmlWebApplicationContext expects the the BundleContext to |
| // be set in the ServletContext under the attribute |
| // OsgiBundleXmlWebApplicationContext.BUNDLE_CONTEXT_ATTRIBUTE |
| try { |
| Class<?> clazz = Class |
| .forName("org.springframework.osgi.web.context.support.OsgiBundleXmlWebApplicationContext"); |
| String key = (String) clazz.getDeclaredField( |
| "BUNDLE_CONTEXT_ATTRIBUTE").get(null); |
| servletContext.setAttribute(key, bctx); |
| } catch (ClassNotFoundException e) { |
| LOG.debug("Spring OSGi support is not enabled"); |
| } catch (Exception e) { |
| LOG.error("The API of Spring OSGi has changed and the field [{}] is no longer available. The OSGi plugin needs to be updated", |
| "org.springframework.osgi.web.context.support.OsgiBundleXmlWebApplicationContext.BUNDLE_CONTEXT_ATTRIBUTE", e); |
| } |
| } |
| |
| /** |
| * This bundle map will not change, but the status of the bundles can change |
| * over time. Use getActiveBundles() for active bundles |
| */ |
| @Override |
| public Map<String, Bundle> getBundles() { |
| Map<String, Bundle> bundles = new HashMap<>(); |
| for (Bundle bundle : bctx.getBundles()) { |
| bundles.put(bundle.getSymbolicName(), bundle); |
| } |
| |
| return Collections.unmodifiableMap(bundles); |
| } |
| |
| @Override |
| public Map<String, Bundle> getActiveBundles() { |
| Map<String, Bundle> bundles = new HashMap<>(); |
| for (Bundle bundle : bctx.getBundles()) { |
| if (bundle.getState() == Bundle.ACTIVE) |
| bundles.put(bundle.getSymbolicName(), bundle); |
| } |
| |
| return Collections.unmodifiableMap(bundles); |
| } |
| |
| @Override |
| public BundleContext getBundleContext() { |
| return bctx; |
| } |
| |
| @Override |
| public void destroy() throws Exception { |
| } |
| |
| } |