001/* 002 * Licensed to DuraSpace under one or more contributor license agreements. 003 * See the NOTICE file distributed with this work for additional information 004 * regarding copyright ownership. 005 * 006 * DuraSpace licenses this file to you under the Apache License, 007 * Version 2.0 (the "License"); you may not use this file except in 008 * compliance with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.fcrepo.kernel.modeshape.rdf.impl; 019 020import static java.util.stream.Stream.of; 021import static org.apache.jena.graph.NodeFactory.createURI; 022import static org.apache.jena.graph.Triple.create; 023import static org.apache.jena.rdf.model.ResourceFactory.createTypedLiteral; 024import static org.apache.jena.vocabulary.RDF.type; 025import static org.fcrepo.kernel.api.RdfLexicon.HAS_FIXITY_CHECK_COUNT; 026import static org.fcrepo.kernel.api.RdfLexicon.HAS_FIXITY_ERROR_COUNT; 027import static org.fcrepo.kernel.api.RdfLexicon.HAS_FIXITY_REPAIRED_COUNT; 028import static org.fcrepo.kernel.api.RdfLexicon.REPOSITORY_NAMESPACE; 029import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.ROOT; 030import static org.slf4j.LoggerFactory.getLogger; 031 032import org.apache.jena.rdf.model.Resource; 033import org.fcrepo.kernel.api.identifiers.IdentifierConverter; 034import org.fcrepo.kernel.api.models.FedoraResource; 035import org.fcrepo.metrics.RegistryService; 036 037import java.util.Map; 038import java.util.stream.Stream; 039import org.slf4j.Logger; 040 041import com.codahale.metrics.Counter; 042import org.apache.jena.graph.Triple; 043 044/** 045 * Assemble {@link Triple}s derived from the root of a repository. 046 * 047 * @author ajs6f 048 * @since Oct 18, 2013 049 */ 050public class RootRdfContext extends NodeRdfContext { 051 052 private static final String PREFIX = "org.fcrepo.services."; 053 private static final String FIXITY_REPAIRED_COUNTER = "LowLevelStorageService.fixity-repaired-counter"; 054 private static final String FIXITY_ERROR_COUNTER = "LowLevelStorageService.fixity-error-counter"; 055 private static final String FIXITY_CHECK_COUNTER = "LowLevelStorageService.fixity-check-counter"; 056 private static final Logger LOGGER = getLogger(RootRdfContext.class); 057 static final RegistryService registryService = RegistryService.getInstance(); 058 059 /** 060 * Ordinary constructor. 061 * 062 * @param resource the resource 063 * @param idTranslator the id translator 064 */ 065 public RootRdfContext(final FedoraResource resource, 066 final IdentifierConverter<Resource, FedoraResource> idTranslator) { 067 super(resource, idTranslator); 068 069 if (resource().hasType(ROOT)) { 070 concat(getRepositoryTriples()); 071 } 072 } 073 074 private Stream<Triple> getRepositoryTriples() { 075 LOGGER.trace("Creating RDF triples for repository description"); 076 077 final Stream.Builder<Triple> b = Stream.builder(); 078 079 of("RepositoryRoot", "Resource", "Container").forEach(x -> 080 b.accept(create(subject(), type.asNode(), createURI(REPOSITORY_NAMESPACE + x)))); 081 082 /* 083 FIXME: removing due to performance problems, esp. w/ many files on federated filesystem 084 see: https://www.pivotaltracker.com/story/show/78647248 085 086 final Repository repository = session().getRepository(); 087 088 b.add(create(subject(), HAS_OBJECT_COUNT.asNode(), createLiteral(String 089 .valueOf(getRepositoryCount(repository))))); 090 b.add(create(subject(), HAS_OBJECT_SIZE.asNode(), createLiteral(String 091 .valueOf(getRepositorySize(repository))))); 092 */ 093 094 // retrieve the metrics from the service 095 final Map<String, Counter> counters = registryService.getMetrics().getCounters(); 096 // and add the repository metrics to the RDF model 097 if (counters.containsKey(FIXITY_CHECK_COUNTER)) { 098 b.accept(create(subject(), HAS_FIXITY_CHECK_COUNT.asNode(), 099 createTypedLiteral(counters.get(PREFIX + FIXITY_CHECK_COUNTER).getCount()).asNode())); 100 } 101 102 if (counters.containsKey(FIXITY_ERROR_COUNTER)) { 103 b.accept(create(subject(), HAS_FIXITY_ERROR_COUNT.asNode(), 104 createTypedLiteral(counters.get(PREFIX + FIXITY_ERROR_COUNTER).getCount()).asNode())); 105 } 106 107 if (counters.containsKey(FIXITY_REPAIRED_COUNTER)) { 108 b.accept(create(subject(), HAS_FIXITY_REPAIRED_COUNT.asNode(), 109 createTypedLiteral(counters.get(PREFIX + FIXITY_REPAIRED_COUNTER).getCount()).asNode())); 110 } 111 112 // offer all these accumulated triples 113 return b.build(); 114 } 115}