| /* |
| * 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.jcr.resource.internal; |
| |
| import java.io.Closeable; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| |
| import javax.jcr.RepositoryException; |
| import javax.jcr.Session; |
| import javax.jcr.observation.Event; |
| import javax.jcr.observation.EventListener; |
| import javax.jcr.observation.ObservationManager; |
| |
| import org.apache.jackrabbit.api.observation.JackrabbitEventFilter; |
| import org.apache.jackrabbit.api.observation.JackrabbitObservationManager; |
| import org.apache.jackrabbit.oak.jcr.observation.filter.FilterFactory; |
| import org.apache.jackrabbit.oak.jcr.observation.filter.OakEventFilter; |
| import org.apache.sling.api.resource.observation.ResourceChange.ChangeType; |
| import org.apache.sling.api.resource.path.Path; |
| import org.apache.sling.jcr.api.SlingRepository; |
| import org.apache.sling.spi.resource.provider.ObservationReporter; |
| import org.apache.sling.spi.resource.provider.ObserverConfiguration; |
| import org.jetbrains.annotations.NotNull; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This is the base configuration for a JCR listener, shared |
| * by all registered {@link JcrResourceListener}s. |
| */ |
| public class JcrListenerBaseConfig implements Closeable { |
| |
| private final Logger logger = LoggerFactory.getLogger(JcrListenerBaseConfig.class); |
| |
| private final Session session; |
| |
| private final ObservationReporter reporter; |
| |
| @SuppressWarnings("deprecation") |
| public JcrListenerBaseConfig(final @NotNull ObservationReporter reporter, final @NotNull SlingRepository repository) throws RepositoryException { |
| this.reporter = reporter; |
| // The session should have read access on the whole repository |
| this.session = repository.loginService("observation", repository.getDefaultWorkspace()); |
| } |
| |
| /** |
| * Dispose this config |
| * Close session. |
| */ |
| @Override |
| public void close() { |
| this.session.logout(); |
| } |
| |
| /** |
| * Register a JCR event listener |
| * @param listener The listener |
| * @param config The configuration |
| * @throws RepositoryException If registration fails. |
| */ |
| public void register(final @NotNull EventListener listener, final @NotNull ObserverConfiguration config) throws RepositoryException { |
| final ObservationManager mgr = this.session.getWorkspace().getObservationManager(); |
| if (mgr instanceof JackrabbitObservationManager) { |
| final OakEventFilter filter = FilterFactory.wrap(new JackrabbitEventFilter()); |
| // paths |
| setFilterPaths(filter, config); |
| |
| // exclude paths |
| final Set<String> excludePaths = config.getExcludedPaths().toStringSet(); |
| if (!excludePaths.isEmpty()) { |
| filter.setExcludedPaths(excludePaths.toArray(new String[0])); |
| } |
| |
| filter.setIsDeep(true); |
| |
| // external |
| filter.setNoExternal(!config.includeExternal()); |
| |
| // types |
| filter.setEventTypes(getTypes(config)); |
| |
| // nt:file handling |
| filter.withNodeTypeAggregate(new String[]{"nt:file"}, new String[]{"", "jcr:content"}); |
| |
| // ancestors remove |
| filter.withIncludeAncestorsRemove(); |
| |
| ((JackrabbitObservationManager) mgr).addEventListener(listener, filter); |
| } else { |
| throw new RepositoryException("Observation manager is not a JackrabbitObservationManager"); |
| } |
| |
| } |
| |
| protected static void setFilterPaths(@NotNull OakEventFilter filter, @NotNull ObserverConfiguration config) { |
| final Set<String> paths = config.getPaths().toStringSet(); |
| // avoid any resizing of these lists |
| List<String> pathList = new ArrayList<>(paths.size()); |
| List<String> globList = new ArrayList<>(paths.size()); |
| |
| for (final String p : paths) { |
| if (p.startsWith(Path.GLOB_PREFIX)) { |
| globList.add(p.substring(Path.GLOB_PREFIX.length())); |
| } else { |
| pathList.add(p); |
| } |
| } |
| if (!globList.isEmpty()) { |
| filter.withIncludeGlobPaths(globList.toArray(new String[0])); |
| } |
| if (!pathList.isEmpty()) { |
| filter.setAdditionalPaths(pathList.toArray(new String[0])); |
| } |
| } |
| |
| /** |
| * Get the event types based on the configuration |
| * @param c The configuration |
| * @return The event type mask |
| */ |
| private static int getTypes(final @NotNull ObserverConfiguration c) { |
| int result = 0; |
| for (ChangeType t : c.getChangeTypes()) { |
| switch (t) { |
| case ADDED: |
| result = result | Event.NODE_ADDED; |
| break; |
| case REMOVED: |
| result = result | Event.NODE_REMOVED; |
| break; |
| case CHANGED: |
| result = result | Event.PROPERTY_ADDED; |
| result = result | Event.PROPERTY_CHANGED; |
| result = result | Event.PROPERTY_REMOVED; |
| break; |
| default: |
| break; |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Unregister the listener. |
| * @param listener The listener |
| */ |
| public void unregister(final EventListener listener) { |
| try { |
| this.session.getWorkspace().getObservationManager().removeEventListener(listener); |
| } catch (final RepositoryException e) { |
| logger.warn("Unable to remove session listener: " + this, e); |
| } |
| } |
| |
| /** |
| * The observation reporter |
| * @return The observation reporter. |
| */ |
| public @NotNull ObservationReporter getReporter() { |
| return this.reporter; |
| } |
| } |