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.impl.rdf.impl; 017 018import static com.google.common.collect.ImmutableSet.builder; 019import static com.hp.hpl.jena.graph.NodeFactory.createLiteral; 020import static com.hp.hpl.jena.graph.NodeFactory.createURI; 021import static com.hp.hpl.jena.graph.Triple.create; 022import static com.hp.hpl.jena.rdf.model.ResourceFactory.createTypedLiteral; 023import static org.fcrepo.kernel.FedoraJcrTypes.ROOT; 024import static org.fcrepo.kernel.RdfLexicon.HAS_FIXITY_CHECK_COUNT; 025import static org.fcrepo.kernel.RdfLexicon.HAS_FIXITY_ERROR_COUNT; 026import static org.fcrepo.kernel.RdfLexicon.HAS_FIXITY_REPAIRED_COUNT; 027import static org.fcrepo.kernel.RdfLexicon.HAS_NODE_TYPE; 028import static org.fcrepo.kernel.RdfLexicon.REPOSITORY_NAMESPACE; 029import static org.slf4j.LoggerFactory.getLogger; 030 031import com.hp.hpl.jena.rdf.model.Resource; 032import org.apache.commons.lang.StringUtils; 033import org.fcrepo.kernel.models.FedoraResource; 034import org.fcrepo.kernel.identifiers.IdentifierConverter; 035import org.fcrepo.metrics.RegistryService; 036 037import java.util.Map; 038import java.util.SortedMap; 039 040import javax.jcr.Repository; 041import javax.jcr.RepositoryException; 042import javax.jcr.nodetype.NodeType; 043import javax.jcr.nodetype.NodeTypeIterator; 044import javax.jcr.nodetype.NodeTypeManager; 045 046import org.fcrepo.kernel.impl.services.functions.GetClusterConfiguration; 047import org.modeshape.jcr.JcrRepository; 048import org.slf4j.Logger; 049 050import com.codahale.metrics.Counter; 051import com.google.common.collect.ImmutableSet; 052import com.hp.hpl.jena.graph.Triple; 053 054/** 055 * Assemble {@link Triple}s derived from the root of a repository. 056 * 057 * @author ajs6f 058 * @since Oct 18, 2013 059 */ 060public class RootRdfContext extends NodeRdfContext { 061 062 private static final Logger LOGGER = getLogger(RootRdfContext.class); 063 static final RegistryService registryService = RegistryService.getInstance(); 064 065 /** 066 * Ordinary constructor. 067 * 068 * @param resource the resource 069 * @param idTranslator the id translator 070 * @throws RepositoryException if repository exception occurred 071 */ 072 public RootRdfContext(final FedoraResource resource, 073 final IdentifierConverter<Resource, FedoraResource> idTranslator) 074 throws RepositoryException { 075 super(resource, idTranslator); 076 077 if (resource().hasType(ROOT)) { 078 concatRepositoryTriples(); 079 } 080 } 081 082 private void concatRepositoryTriples() throws RepositoryException { 083 LOGGER.trace("Creating RDF triples for repository description"); 084 final Repository repository = resource().getNode().getSession().getRepository(); 085 086 final ImmutableSet.Builder<Triple> b = builder(); 087 088 for (final String key : repository.getDescriptorKeys()) { 089 final String descriptor = repository.getDescriptor(key); 090 if (descriptor != null) { 091 // Create a URI from the jcr.Repository constant values, 092 // converting them from dot notation (identifier.stability) 093 // to the camel case that is more common in RDF properties. 094 final StringBuilder uri = new StringBuilder(REPOSITORY_NAMESPACE); 095 uri.append("repository"); 096 for (final String segment : key.split("\\.")) { 097 uri.append(StringUtils.capitalize(segment)); 098 } 099 b.add(create(subject(), createURI(uri.toString()), 100 createLiteral(descriptor))); 101 } 102 } 103 final NodeTypeManager nodeTypeManager = 104 resource().getNode().getSession().getWorkspace().getNodeTypeManager(); 105 106 final NodeTypeIterator nodeTypes = nodeTypeManager.getAllNodeTypes(); 107 while (nodeTypes.hasNext()) { 108 final NodeType nodeType = nodeTypes.nextNodeType(); 109 b.add(create(subject(), HAS_NODE_TYPE.asNode(), 110 createLiteral(nodeType.getName()))); 111 } 112 113 /* 114 FIXME: removing due to performance problems, esp. w/ many files on federated filesystem 115 see: https://www.pivotaltracker.com/story/show/78647248 116 117 b.add(create(subject(), HAS_OBJECT_COUNT.asNode(), createLiteral(String 118 .valueOf(getRepositoryCount(repository))))); 119 b.add(create(subject(), HAS_OBJECT_SIZE.asNode(), createLiteral(String 120 .valueOf(getRepositorySize(repository))))); 121 */ 122 123 // Get the cluster configuration, if available 124 // this ugly test checks to see whether this is an ordinary JCR 125 // repository or a ModeShape repo, which will possess the extra info 126 if (JcrRepository.class.isAssignableFrom(repository.getClass())) { 127 final Map<String, String> config = 128 new GetClusterConfiguration().apply(repository); 129 assert (config != null); 130 131 for (final Map.Entry<String, String> entry : config.entrySet()) { 132 b.add(create(subject(), createURI(REPOSITORY_NAMESPACE + entry.getKey()), 133 createLiteral(entry.getValue()))); 134 } 135 } 136 137 // retrieve the metrics from the service 138 final SortedMap<String, Counter> counters = registryService.getMetrics().getCounters(); 139 // and add the repository metrics to the RDF model 140 if (counters.containsKey("LowLevelStorageService.fixity-check-counter")) { 141 b.add(create(subject(), HAS_FIXITY_CHECK_COUNT.asNode(), 142 createTypedLiteral( 143 counters.get( 144 "org.fcrepo.services." 145 + "LowLevelStorageService." 146 + "fixity-check-counter") 147 .getCount()).asNode())); 148 } 149 150 if (counters.containsKey("LowLevelStorageService.fixity-error-counter")) { 151 b.add(create(subject(), HAS_FIXITY_ERROR_COUNT.asNode(), 152 createTypedLiteral( 153 counters.get( 154 "org.fcrepo.services." 155 + "LowLevelStorageService." 156 + "fixity-error-counter") 157 .getCount()).asNode())); 158 } 159 160 if (counters 161 .containsKey("LowLevelStorageService.fixity-repaired-counter")) { 162 b.add(create(subject(), HAS_FIXITY_REPAIRED_COUNT.asNode(), 163 createTypedLiteral( 164 counters.get( 165 "org.fcrepo.services." 166 + "LowLevelStorageService." 167 + "fixity-repaired-counter") 168 .getCount()).asNode())); 169 } 170 171 // offer all these accumulated triples 172 concat(b.build()); 173 } 174 175}