| /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| ~ 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.sling.scripting.core.impl.bundled; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Array; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import javax.script.ScriptException; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.sling.api.SlingHttpServletRequest; |
| import org.apache.sling.api.SlingHttpServletResponse; |
| import org.apache.sling.scripting.core.impl.helper.OnDemandReaderRequest; |
| import org.apache.sling.scripting.core.impl.helper.OnDemandWriterResponse; |
| import org.apache.sling.scripting.spi.bundle.TypeProvider; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceReference; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| abstract class AbstractBundledRenderUnit implements ExecutableUnit { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(AbstractBundledRenderUnit.class.getName()); |
| |
| private final Set<TypeProvider> providers; |
| private final Bundle bundle; |
| private final BundleContext bundleContext; |
| private final String path; |
| private final String scriptEngineName; |
| private final String scriptExtension; |
| private final ScriptContextProvider scriptContextProvider; |
| private List<ServiceReference<?>> references; |
| private Map<String, Object> services; |
| |
| |
| AbstractBundledRenderUnit(@NotNull Set<TypeProvider> providers, @NotNull BundleContext context, @NotNull Bundle bundle, @NotNull String path, |
| @NotNull String scriptEngineName, @NotNull String scriptExtension, @NotNull ScriptContextProvider scriptContextProvider) { |
| this.providers = providers; |
| this.bundle = bundle; |
| this.path = path; |
| this.scriptEngineName = scriptEngineName; |
| this.scriptExtension = scriptExtension; |
| this.scriptContextProvider = scriptContextProvider; |
| this.bundleContext = context; |
| } |
| |
| @Override |
| @NotNull |
| public Bundle getBundle() { |
| return bundle; |
| } |
| |
| @Override |
| @NotNull |
| public BundleContext getBundleContext() { |
| return bundleContext; |
| } |
| |
| @Override |
| public @NotNull Set<TypeProvider> getTypeProviders() { |
| return providers; |
| } |
| |
| @Override |
| public @NotNull String getPath() { |
| return path; |
| } |
| |
| @Override |
| public @NotNull String getScriptEngineName() { |
| return scriptEngineName; |
| } |
| |
| @Override |
| public @NotNull String getScriptExtension() { |
| return scriptExtension; |
| } |
| |
| @Override |
| @Nullable |
| @SuppressWarnings("unchecked") |
| public <T> T getService(@NotNull String className) { |
| LOG.debug("Attempting to load class {} as an OSGi service.", className); |
| T result = (this.services == null ? null : (T) this.services.get(className)); |
| if (result == null) { |
| final ServiceReference<?> ref = this.bundleContext.getServiceReference(className); |
| if (ref != null) { |
| result = (T) this.bundleContext.getService(ref); |
| if (result != null) { |
| if (this.services == null) { |
| this.services = new HashMap<>(); |
| } |
| if (this.references == null) { |
| this.references = new ArrayList<>(); |
| } |
| this.references.add(ref); |
| this.services.put(className, result); |
| return result; |
| } |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| @Nullable |
| @SuppressWarnings("unchecked") |
| public <T> T[] getServices(@NotNull String className, @Nullable String filter) { |
| T[] result = null; |
| try { |
| final ServiceReference<?>[] refs = this.bundleContext.getServiceReferences(className, filter); |
| |
| if (refs != null) { |
| // sort by service ranking (lowest first) (see ServiceReference#compareTo(Object)) |
| List<ServiceReference<?>> localReferences = Arrays.asList(refs); |
| Collections.sort(localReferences); |
| // get the highest ranking first |
| Collections.reverse(localReferences); |
| |
| final List<T> objects = new ArrayList<>(); |
| for (ServiceReference<?> reference : localReferences) { |
| final T service = (T) this.bundleContext.getService(reference); |
| if (service != null) { |
| if (this.references == null) { |
| this.references = new ArrayList<>(); |
| } |
| this.references.add(reference); |
| objects.add(service); |
| } |
| } |
| if (!objects.isEmpty()) { |
| T[] srv = (T[]) Array.newInstance(bundle.loadClass(className), objects.size()); |
| result = objects.toArray(srv); |
| } |
| } |
| } catch (Exception e) { |
| LOG.error(String.format("Unable to retrieve the services of type %s.", className), e); |
| } |
| return result; |
| } |
| |
| @Override |
| public void releaseDependencies() { |
| if (references != null) { |
| for (ServiceReference<?> reference : this.references) { |
| bundleContext.ungetService(reference); |
| } |
| references.clear(); |
| } |
| if (services != null) { |
| services.clear(); |
| } |
| } |
| |
| |
| @Override |
| public void eval(@NotNull HttpServletRequest request, @NotNull HttpServletResponse response) throws ScriptException { |
| try { |
| ScriptContextProvider.ExecutableContext executableContext = scriptContextProvider |
| .prepareScriptContext(new OnDemandReaderRequest((SlingHttpServletRequest) request), |
| new OnDemandWriterResponse((SlingHttpServletResponse) response), this); |
| try { |
| executableContext.eval(); |
| } |
| finally { |
| executableContext.clean(); |
| } |
| } catch (IOException ex) { |
| throw new ScriptException(ex); |
| } |
| } |
| } |