Java tutorial
/* * Licensed to DuraSpace under one or more contributor license agreements. * See the NOTICE file distributed with this work for additional information * regarding copyright ownership. * * DuraSpace 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.fcrepo.integration.kernel.modeshape.observer; import static java.util.Arrays.asList; import static java.util.concurrent.TimeUnit.SECONDS; import static com.jayway.awaitility.Awaitility.await; import static com.jayway.awaitility.Duration.ONE_HUNDRED_MILLISECONDS; import static org.fcrepo.kernel.api.FedoraTypes.FEDORA_BINARY; import static org.fcrepo.kernel.api.FedoraTypes.FEDORA_CONTAINER; import static org.fcrepo.kernel.api.FedoraTypes.FEDORA_RESOURCE; import static org.fcrepo.kernel.api.RdfLexicon.REPOSITORY_NAMESPACE; import static org.fcrepo.kernel.api.RequiredRdfContext.PROPERTIES; import static org.fcrepo.kernel.api.observer.EventType.RESOURCE_CREATION; import static org.fcrepo.kernel.api.observer.EventType.RESOURCE_DELETION; import static org.fcrepo.kernel.api.observer.EventType.RESOURCE_MODIFICATION; import static org.fcrepo.kernel.api.observer.EventType.RESOURCE_RELOCATION; import static org.fcrepo.kernel.api.utils.ContentDigest.DIGEST_ALGORITHM.SHA1; import static org.fcrepo.kernel.api.utils.ContentDigest.asURI; import static org.fcrepo.kernel.modeshape.FedoraSessionImpl.getJcrSession; import static org.junit.Assert.assertEquals; import static org.modeshape.jcr.api.JcrConstants.JCR_CONTENT; import static org.modeshape.jcr.api.JcrConstants.NT_FILE; import static org.modeshape.jcr.api.JcrConstants.NT_FOLDER; import static org.modeshape.jcr.api.JcrConstants.NT_RESOURCE; import java.io.ByteArrayInputStream; import java.util.HashSet; import java.util.List; import java.util.concurrent.CopyOnWriteArrayList; import javax.inject.Inject; import javax.jcr.Node; import javax.jcr.RepositoryException; import javax.jcr.Session; import org.fcrepo.integration.kernel.modeshape.AbstractIT; import org.fcrepo.kernel.api.FedoraRepository; import org.fcrepo.kernel.api.FedoraSession; import org.fcrepo.kernel.api.exception.InvalidChecksumException; import org.fcrepo.kernel.api.models.Container; import org.fcrepo.kernel.api.models.FedoraBinary; import org.fcrepo.kernel.api.observer.EventType; import org.fcrepo.kernel.api.observer.FedoraEvent; import org.fcrepo.kernel.api.services.ContainerService; import org.fcrepo.kernel.api.services.NodeService; import org.fcrepo.kernel.modeshape.FedoraBinaryImpl; import org.fcrepo.kernel.modeshape.rdf.impl.DefaultIdentifierTranslator; import org.fcrepo.kernel.modeshape.services.NodeServiceImpl; import org.junit.After; import org.junit.Before; import org.junit.Test; import org.modeshape.jcr.api.JcrTools; import org.modeshape.jcr.api.ValueFactory; import org.springframework.test.context.ContextConfiguration; import com.google.common.eventbus.EventBus; import com.google.common.eventbus.Subscribe; import org.apache.jena.rdf.model.Resource; /** * <p>SimpleObserverIT class.</p> * * @author awoods * @author acoburn */ @ContextConfiguration({ "/spring-test/eventing.xml", "/spring-test/repo.xml" }) public class SimpleObserverIT extends AbstractIT { private volatile List<FedoraEvent> events; private Integer eventBusMessageCount; @Inject private FedoraRepository repository; @Inject private EventBus eventBus; @Inject private ContainerService containerService; @Test public void testEventBusPublishing() throws RepositoryException { final FedoraSession session = repository.login(); final Session se = getJcrSession(session); se.getRootNode().addNode("/object1").addMixin(FEDORA_CONTAINER); se.getRootNode().addNode("/object2").addMixin(FEDORA_CONTAINER); session.commit(); session.expire(); // Should be two messages, for each time // each node becomes a Fedora object awaitEvent("/object1", RESOURCE_CREATION, REPOSITORY_NAMESPACE + "Container"); awaitEvent("/object2", RESOURCE_CREATION, REPOSITORY_NAMESPACE + "Container"); assertEquals("Where are my messages!?", (Integer) 2, eventBusMessageCount); } @Test public void contentEventCollapsing() throws RepositoryException, InvalidChecksumException { final FedoraSession session = repository.login(); final Session se = getJcrSession(session); final JcrTools jcrTools = new JcrTools(); final Node n = jcrTools.findOrCreateNode(se.getRootNode(), "/object3", NT_FOLDER, NT_FILE); n.addMixin(FEDORA_RESOURCE); final String content = "test content"; final String checksum = "1eebdf4fdc9fc7bf283031b93f9aef3338de9052"; ((ValueFactory) se.getValueFactory()).createBinary(new ByteArrayInputStream(content.getBytes()), null); final Node contentNode = jcrTools.findOrCreateChild(n, JCR_CONTENT, NT_RESOURCE); contentNode.addMixin(FEDORA_BINARY); final FedoraBinary binary = new FedoraBinaryImpl(contentNode); binary.setContent(new ByteArrayInputStream(content.getBytes()), "text/plain", new HashSet<>(asList(asURI(SHA1.algorithm, checksum))), "text.txt", null); try { session.commit(); } finally { session.expire(); } awaitEvent("/object3", RESOURCE_CREATION, REPOSITORY_NAMESPACE + "Binary"); assertEquals("Node and content events not collapsed!", (Integer) 1, eventBusMessageCount); } @Test public void testMoveEvent() throws RepositoryException { final FedoraSession session = repository.login(); final Session se = getJcrSession(session); final NodeService ns = new NodeServiceImpl(); final Node n = se.getRootNode().addNode("/object4"); n.addMixin(FEDORA_CONTAINER); n.addNode("/child1").addMixin(FEDORA_CONTAINER); n.addNode("/child2").addMixin(FEDORA_CONTAINER); session.commit(); ns.moveObject(session, "/object4", "/object5"); session.commit(); session.expire(); awaitEvent("/object4", RESOURCE_CREATION); awaitEvent("/object4/child1", RESOURCE_CREATION); awaitEvent("/object4/child2", RESOURCE_CREATION); awaitEvent("/object5", RESOURCE_RELOCATION); awaitEvent("/object5/child1", RESOURCE_RELOCATION); awaitEvent("/object5/child2", RESOURCE_RELOCATION); awaitEvent("/object4", RESOURCE_DELETION); awaitEvent("/object4/child1", RESOURCE_DELETION); awaitEvent("/object4/child2", RESOURCE_DELETION); assertEquals("Move operation didn't generate additional events", (Integer) 9, eventBusMessageCount); } @Test public void testMoveContainedEvent() throws RepositoryException { final FedoraSession session = repository.login(); final Session se = getJcrSession(session); final NodeService ns = new NodeServiceImpl(); final Node n = se.getRootNode().addNode("/object6"); n.addMixin(FEDORA_CONTAINER); final Node child = n.addNode("/object7"); child.addMixin(FEDORA_CONTAINER); child.addNode("/child1").addMixin(FEDORA_CONTAINER); child.addNode("/child2").addMixin(FEDORA_CONTAINER); session.commit(); ns.moveObject(session, "/object6/object7", "/object6/object8"); session.commit(); session.expire(); awaitEvent("/object6", RESOURCE_CREATION); awaitEvent("/object6/object7", RESOURCE_CREATION); awaitEvent("/object6/object7/child1", RESOURCE_CREATION); awaitEvent("/object6/object7/child2", RESOURCE_CREATION); awaitEvent("/object6/object8", RESOURCE_RELOCATION); awaitEvent("/object6/object8/child1", RESOURCE_RELOCATION); awaitEvent("/object6/object8/child2", RESOURCE_RELOCATION); awaitEvent("/object6/object7", RESOURCE_DELETION); awaitEvent("/object6/object7/child1", RESOURCE_DELETION); awaitEvent("/object6/object7/child2", RESOURCE_DELETION); // should produce two of these awaitEvent("/object6", RESOURCE_MODIFICATION); assertEquals("Move operation didn't generate additional events", (Integer) 12, eventBusMessageCount); } @Test public void testHashUriEvent() throws RepositoryException { final FedoraSession session = repository.login(); final Session se = getJcrSession(session); final DefaultIdentifierTranslator subjects = new DefaultIdentifierTranslator(se); final Container obj = containerService.findOrCreate(session, "/object9"); final Resource subject = subjects.reverse().convert(obj); obj.updateProperties(subjects, "PREFIX dc: <http://purl.org/dc/elements/1.1/>\n" + "PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n" + "INSERT { <" + subject + "> dc:contributor <" + subject + "#contributor> .\n" + "<" + subject + "#contributor> foaf:name \"some creator\" . } WHERE {}", obj.getTriples(subjects, PROPERTIES)); session.commit(); session.expire(); // these first two are part of a single event awaitEvent("/object9", RESOURCE_CREATION); awaitEvent("/object9", RESOURCE_MODIFICATION); awaitEvent("/object9#contributor", RESOURCE_MODIFICATION); // FIXME -- it is unclear where this event is coming from; clearly from the hashURI, // but it doesn't seem right. awaitEvent("", RESOURCE_MODIFICATION); // FIXME -- as hinted above, there is an extra event here somehow related to the hashURI. assertEquals("Where are my events?", (Integer) 3, eventBusMessageCount); } @Test public void testDirectContainerEvent() throws RepositoryException { final FedoraSession session = repository.login(); final Session se = getJcrSession(session); final DefaultIdentifierTranslator subjects = new DefaultIdentifierTranslator(se); final Container obj1 = containerService.findOrCreate(session, "/object10"); final Container obj2 = containerService.findOrCreate(session, "/object11"); final Resource subject2 = subjects.reverse().convert(obj2); obj1.updateProperties(subjects, "PREFIX ldp: <http://www.w3.org/ns/ldp#>\n" + "PREFIX pcdm: <http://pcdm.org/models#>\n" + "INSERT { <> a ldp:DirectContainer ;\n" + "ldp:membershipResource <" + subject2 + "> ;\n" + "ldp:hasMemberRelation pcdm:hasMember . } WHERE {}", obj1.getTriples(subjects, PROPERTIES)); try { session.commit(); awaitEvent("/object10", RESOURCE_CREATION); awaitEvent("/object10", RESOURCE_MODIFICATION); awaitEvent("/object11", RESOURCE_CREATION); assertEquals("Where are my events?", (Integer) 3, eventBusMessageCount); final Container obj3 = containerService.findOrCreate(session, "/object10/child"); session.commit(); awaitEvent("/object10/child", RESOURCE_CREATION); awaitEvent("/object10", RESOURCE_MODIFICATION); awaitEvent("/object11", RESOURCE_MODIFICATION); assertEquals("Where are my events?", (Integer) 6, eventBusMessageCount); obj3.delete(); session.commit(); } finally { session.expire(); } awaitEvent("/object10/child", RESOURCE_DELETION); awaitEvent("/object10", RESOURCE_MODIFICATION); awaitEvent("/object11", RESOURCE_MODIFICATION); assertEquals("Where are my events?", (Integer) 9, eventBusMessageCount); } @Test public void testIndirectContainerEvent() throws RepositoryException { final FedoraSession session = repository.login(); final Session se = getJcrSession(session); final DefaultIdentifierTranslator subjects = new DefaultIdentifierTranslator(se); final Container obj1 = containerService.findOrCreate(session, "/object12"); final Container obj2 = containerService.findOrCreate(session, "/object13"); final Resource subject2 = subjects.reverse().convert(obj2); obj1.updateProperties(subjects, "PREFIX ldp: <http://www.w3.org/ns/ldp#>\n" + "PREFIX pcdm: <http://pcdm.org/models#>\n" + "PREFIX ore: <http://www.openarchives.org/ore/terms/>\n" + "INSERT { <> a ldp:IndirectContainer ;\n" + "ldp:membershipResource <" + subject2 + "> ;\n" + "ldp:hasMemberRelation pcdm:hasMember ;\n" + "ldp:insertedContentRelation ore:proxyFor. } WHERE {}", obj1.getTriples(subjects, PROPERTIES)); try { session.commit(); awaitEvent("/object12", RESOURCE_CREATION); awaitEvent("/object12", RESOURCE_MODIFICATION); awaitEvent("/object13", RESOURCE_CREATION); assertEquals("Where are my events?", (Integer) 3, eventBusMessageCount); final Container obj3 = containerService.findOrCreate(session, "/object12/child"); obj3.updateProperties(subjects, "PREFIX ore: <http://www.openarchives.org/ore/terms/>\n" + "INSERT { <> ore:proxyFor <info:example/test> } WHERE {}", obj3.getTriples(subjects, PROPERTIES)); session.commit(); awaitEvent("/object12/child", RESOURCE_CREATION); awaitEvent("/object12", RESOURCE_MODIFICATION); awaitEvent("/object13", RESOURCE_MODIFICATION); assertEquals("Where are my events?", (Integer) 6, eventBusMessageCount); final Container obj4 = containerService.findOrCreate(session, "/object12/child2"); session.commit(); awaitEvent("/object12/child2", RESOURCE_CREATION); awaitEvent("/object12", RESOURCE_MODIFICATION); assertEquals("Where are my events?", (Integer) 8, eventBusMessageCount); // Update a property that is irrelevant for the indirect container obj4.updateProperties(subjects, "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>\n" + "INSERT { <> rdfs:label \"some label\" } WHERE {}", obj4.getTriples(subjects, PROPERTIES)); session.commit(); awaitEvent("/object12/child2", RESOURCE_MODIFICATION); assertEquals("Where are my events?", (Integer) 9, eventBusMessageCount); // Update a property that is relevant for the indirect container obj4.updateProperties(subjects, "PREFIX ore: <http://www.openarchives.org/ore/terms/>\n" + "INSERT { <> ore:proxyFor \"some proxy\" } WHERE {}", obj4.getTriples(subjects, PROPERTIES)); session.commit(); awaitEvent("/object12/child2", RESOURCE_MODIFICATION); awaitEvent("/object13", RESOURCE_MODIFICATION); assertEquals("Where are my events?", (Integer) 11, eventBusMessageCount); obj3.delete(); session.commit(); } finally { session.expire(); } awaitEvent("/object12/child", RESOURCE_DELETION); awaitEvent("/object12", RESOURCE_MODIFICATION); awaitEvent("/object13", RESOURCE_MODIFICATION); assertEquals("Where are my events?", (Integer) 14, eventBusMessageCount); } private void awaitEvent(final String id, final EventType eventType, final String resourceType) { await().atMost(5, SECONDS).pollInterval(ONE_HUNDRED_MILLISECONDS).until( () -> events.stream().anyMatch(evt -> evt.getPath().equals(id) && evt.getTypes().contains(eventType) && (resourceType == null || evt.getResourceTypes().contains(resourceType)))); } private void awaitEvent(final String id, final EventType eventType) { awaitEvent(id, eventType, null); } @Subscribe public void countMessages(final FedoraEvent e) { eventBusMessageCount++; events.add(e); } @Before public void acquireConnections() { eventBusMessageCount = 0; events = new CopyOnWriteArrayList<>(); eventBus.register(this); } @After public void releaseConnections() { eventBus.unregister(this); } }