001/* 002 * Copyright 2015 DuraSpace, Inc. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.fcrepo.kernel.modeshape.rdf.impl; 017 018import static java.util.stream.Stream.of; 019import static com.hp.hpl.jena.graph.NodeFactory.createURI; 020import static com.hp.hpl.jena.graph.Triple.create; 021import static com.hp.hpl.jena.rdf.model.ResourceFactory.createTypedLiteral; 022import static com.hp.hpl.jena.vocabulary.RDF.type; 023import static org.fcrepo.kernel.api.RdfLexicon.HAS_FIXITY_CHECK_COUNT; 024import static org.fcrepo.kernel.api.RdfLexicon.HAS_FIXITY_ERROR_COUNT; 025import static org.fcrepo.kernel.api.RdfLexicon.HAS_FIXITY_REPAIRED_COUNT; 026import static org.fcrepo.kernel.api.RdfLexicon.REPOSITORY_NAMESPACE; 027import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.ROOT; 028import static org.slf4j.LoggerFactory.getLogger; 029 030import com.hp.hpl.jena.rdf.model.Resource; 031import org.fcrepo.kernel.api.identifiers.IdentifierConverter; 032import org.fcrepo.kernel.api.models.FedoraResource; 033import org.fcrepo.metrics.RegistryService; 034 035import java.util.Map; 036import java.util.stream.Stream; 037import org.slf4j.Logger; 038 039import com.codahale.metrics.Counter; 040import com.hp.hpl.jena.graph.Triple; 041 042/** 043 * Assemble {@link Triple}s derived from the root of a repository. 044 * 045 * @author ajs6f 046 * @since Oct 18, 2013 047 */ 048public class RootRdfContext extends NodeRdfContext { 049 050 private static final String PREFIX = "org.fcrepo.services."; 051 private static final String FIXITY_REPAIRED_COUNTER = "LowLevelStorageService.fixity-repaired-counter"; 052 private static final String FIXITY_ERROR_COUNTER = "LowLevelStorageService.fixity-error-counter"; 053 private static final String FIXITY_CHECK_COUNTER = "LowLevelStorageService.fixity-check-counter"; 054 private static final Logger LOGGER = getLogger(RootRdfContext.class); 055 static final RegistryService registryService = RegistryService.getInstance(); 056 057 /** 058 * Ordinary constructor. 059 * 060 * @param resource the resource 061 * @param idTranslator the id translator 062 */ 063 public RootRdfContext(final FedoraResource resource, 064 final IdentifierConverter<Resource, FedoraResource> idTranslator) { 065 super(resource, idTranslator); 066 067 if (resource().hasType(ROOT)) { 068 concat(getRepositoryTriples()); 069 } 070 } 071 072 private Stream<Triple> getRepositoryTriples() { 073 LOGGER.trace("Creating RDF triples for repository description"); 074 075 final Stream.Builder<Triple> b = Stream.builder(); 076 077 of("RepositoryRoot", "Resource", "Container").forEach(x -> 078 b.accept(create(subject(), type.asNode(), createURI(REPOSITORY_NAMESPACE + x)))); 079 080 /* 081 FIXME: removing due to performance problems, esp. w/ many files on federated filesystem 082 see: https://www.pivotaltracker.com/story/show/78647248 083 084 final Repository repository = session().getRepository(); 085 086 b.add(create(subject(), HAS_OBJECT_COUNT.asNode(), createLiteral(String 087 .valueOf(getRepositoryCount(repository))))); 088 b.add(create(subject(), HAS_OBJECT_SIZE.asNode(), createLiteral(String 089 .valueOf(getRepositorySize(repository))))); 090 */ 091 092 // retrieve the metrics from the service 093 final Map<String, Counter> counters = registryService.getMetrics().getCounters(); 094 // and add the repository metrics to the RDF model 095 if (counters.containsKey(FIXITY_CHECK_COUNTER)) { 096 b.accept(create(subject(), HAS_FIXITY_CHECK_COUNT.asNode(), 097 createTypedLiteral(counters.get(PREFIX + FIXITY_CHECK_COUNTER).getCount()).asNode())); 098 } 099 100 if (counters.containsKey(FIXITY_ERROR_COUNTER)) { 101 b.accept(create(subject(), HAS_FIXITY_ERROR_COUNT.asNode(), 102 createTypedLiteral(counters.get(PREFIX + FIXITY_ERROR_COUNTER).getCount()).asNode())); 103 } 104 105 if (counters.containsKey(FIXITY_REPAIRED_COUNTER)) { 106 b.accept(create(subject(), HAS_FIXITY_REPAIRED_COUNT.asNode(), 107 createTypedLiteral(counters.get(PREFIX + FIXITY_REPAIRED_COUNTER).getCount()).asNode())); 108 } 109 110 // offer all these accumulated triples 111 return b.build(); 112 } 113}