| /* |
| * 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.cms.core.internal.listeners; |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.sling.api.resource.LoginException; |
| import org.apache.sling.api.resource.Resource; |
| import org.apache.sling.api.resource.ResourceResolver; |
| import org.apache.sling.api.resource.ResourceResolverFactory; |
| import org.apache.sling.api.resource.observation.ExternalResourceChangeListener; |
| import org.apache.sling.api.resource.observation.ResourceChange; |
| import org.apache.sling.api.resource.observation.ResourceChangeListener; |
| import org.apache.sling.cms.CMSConstants; |
| import org.apache.sling.cms.File; |
| import org.apache.sling.cms.FileMetadataExtractor; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Reference; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A Resource Change Listener which extracts the metadata from sling:Files when |
| * they are uploaded. |
| */ |
| @Component(service = { FileMetadataExtractorListener.class, ResourceChangeListener.class, |
| ExternalResourceChangeListener.class }, property = { ResourceChangeListener.CHANGES + "=ADDED", |
| ResourceChangeListener.PATHS + "=/content", |
| ResourceChangeListener.PATHS + "=/static" }, immediate = true) |
| public class FileMetadataExtractorListener implements ResourceChangeListener, ExternalResourceChangeListener { |
| |
| private static final Logger log = LoggerFactory.getLogger(FileMetadataExtractorListener.class); |
| |
| @Reference |
| private FileMetadataExtractor extractor; |
| |
| @Reference |
| private ResourceResolverFactory factory; |
| |
| private void handleChange(Resource changed) { |
| if (CMSConstants.NT_FILE.equals(changed.getResourceType())) { |
| log.debug("Extracting metadata from changed resource: {}", changed); |
| try { |
| extractor.updateMetadata(changed.adaptTo(File.class), true); |
| } catch (Exception e) { |
| log.warn("Failed to extract metadata from change: {}", changed, e); |
| } |
| } else { |
| log.trace("Not extracting metadata from changed resource: {}", changed); |
| } |
| } |
| |
| @Override |
| public void onChange(List<ResourceChange> changes) { |
| try (ResourceResolver serviceResolver = factory.getServiceResourceResolver( |
| Collections.singletonMap(ResourceResolverFactory.SUBSERVICE, "sling-cms-metadata"))) { |
| for (ResourceChange rc : changes) { |
| Resource changed = serviceResolver.getResource(rc.getPath()); |
| handleChange(changed); |
| } |
| } catch (LoginException e) { |
| log.error("Exception getting service user", e); |
| } |
| } |
| |
| } |