Java tutorial
/** * Copyright 2008 The University of North Carolina at Chapel Hill * * Licensed 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 edu.unc.lib.dl.services; import static edu.unc.lib.dl.xml.JDOMNamespaceUtil.ATOM_NS; import static edu.unc.lib.dl.xml.JDOMNamespaceUtil.CDR_MESSAGE_NS; import static edu.unc.lib.dl.xml.NamespaceConstants.CDR_MESSAGE_AUTHOR_URI; import java.util.Collection; import java.util.UUID; import javax.jms.JMSException; import javax.jms.Message; import javax.jms.Session; import org.jdom.Document; import org.jdom.Element; import org.jdom.output.XMLOutputter; import org.joda.time.DateTimeUtils; import org.joda.time.format.DateTimeFormatter; import org.joda.time.format.ISODateTimeFormat; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.jms.core.JmsTemplate; import org.springframework.jms.core.MessageCreator; import edu.unc.lib.dl.fedora.PID; import edu.unc.lib.dl.util.IndexingActionType; import edu.unc.lib.dl.util.JMSMessageUtil; /** * @author Gregory Jansen * */ public class OperationsMessageSender { private static final Logger LOG = LoggerFactory.getLogger(OperationsMessageSender.class); private JmsTemplate jmsTemplate = null; public void sendAddOperation(String userid, Collection<PID> destinations, Collection<PID> added, Collection<PID> reordered, String depositId) { Document msg = new Document(); Element contentEl = createAtomEntry(msg, userid, destinations.iterator().next(), "add"); Element add = new Element("add", CDR_MESSAGE_NS); contentEl.addContent(add); add.addContent(new Element("depositId", CDR_MESSAGE_NS).setText(depositId)); for (PID destination : destinations) { add.addContent(new Element("parent", CDR_MESSAGE_NS).setText(destination.getPid())); } Element subjects = new Element("subjects", CDR_MESSAGE_NS); add.addContent(subjects); for (PID sub : added) { subjects.addContent(new Element("pid", CDR_MESSAGE_NS).setText(sub.getPid())); } Element reorderedEl = new Element("reordered", CDR_MESSAGE_NS); add.addContent(reorderedEl); for (PID re : reordered) { reorderedEl.addContent(new Element("pid", CDR_MESSAGE_NS).setText(re.getPid())); } sendMessage(msg); LOG.debug("sent add operation JMS message using JMS template:" + this.getJmsTemplate().toString()); } public void sendRemoveOperation(String userid, PID destination, Collection<PID> removed, Collection<PID> reordered) { Document msg = new Document(); Element contentEl = createAtomEntry(msg, userid, destination, "remove"); Element remove = new Element("remove", CDR_MESSAGE_NS); contentEl.addContent(remove); remove.addContent(new Element("parent", CDR_MESSAGE_NS).setText(destination.getPid())); Element subjects = new Element("subjects", CDR_MESSAGE_NS); remove.addContent(subjects); for (PID sub : removed) { subjects.addContent(new Element("pid", CDR_MESSAGE_NS).setText(sub.getPid())); } Element reorderedEl = new Element("reordered", CDR_MESSAGE_NS); remove.addContent(reorderedEl); if (reordered != null) for (PID re : reordered) { reorderedEl.addContent(new Element("pid", CDR_MESSAGE_NS).setText(re.getPid())); } sendMessage(msg); } public void sendMoveOperation(String userid, Collection<PID> sources, PID destination, Collection<PID> moved, Collection<PID> reordered) { Document msg = new Document(); Element contentEl = createAtomEntry(msg, userid, destination, "move"); Element move = new Element("move", CDR_MESSAGE_NS); contentEl.addContent(move); move.addContent(new Element("parent", CDR_MESSAGE_NS).setText(destination.getPid())); Element oldParents = new Element("oldParents", CDR_MESSAGE_NS); move.addContent(oldParents); for (PID old : sources) { oldParents.addContent(new Element("pid", CDR_MESSAGE_NS).setText(old.getPid())); } Element subjects = new Element("subjects", CDR_MESSAGE_NS); move.addContent(subjects); for (PID sub : moved) { subjects.addContent(new Element("pid", CDR_MESSAGE_NS).setText(sub.getPid())); } Element reorderedEl = new Element("reordered", CDR_MESSAGE_NS); move.addContent(reorderedEl); for (PID re : reordered) { reorderedEl.addContent(new Element("pid", CDR_MESSAGE_NS).setText(re.getPid())); } sendMessage(msg); } public void sendReorderOperation(String userid, String timestamp, PID destination, Collection<PID> reordered) { Document msg = new Document(); Element contentEl = createAtomEntry(msg, userid, destination, "reorder"); Element reorder = new Element("reorder", CDR_MESSAGE_NS); contentEl.addContent(reorder); reorder.addContent(new Element("parent", CDR_MESSAGE_NS).setText(destination.getPid())); Element reorderedEl = new Element("reordered", CDR_MESSAGE_NS); reorder.addContent(reorderedEl); for (PID re : reordered) { reorderedEl.addContent(new Element("pid", CDR_MESSAGE_NS).setText(re.getPid())); } sendMessage(msg); } /** * * * @param userid * @param pids * @param publish * Subjects are published if true, unpublished if false */ public String sendPublishOperation(String userid, Collection<PID> pids, boolean publish) { String messageId = "urn:uuid:" + UUID.randomUUID().toString(); Document msg = new Document(); Element contentEl = createAtomEntry(msg, userid, pids.iterator().next(), "publish", messageId); Element publishEl = new Element("publish", CDR_MESSAGE_NS); contentEl.addContent(publishEl); Element publishValueEl = new Element("value", CDR_MESSAGE_NS); publishEl.addContent(publishValueEl); if (publish) { publishValueEl.setText("yes"); } else { publishValueEl.setText("no"); } Element subjects = new Element("subjects", CDR_MESSAGE_NS); publishEl.addContent(subjects); for (PID sub : pids) { subjects.addContent(new Element("pid", CDR_MESSAGE_NS).setText(sub.getPid())); } sendMessage(msg); return messageId; } public String sendIndexingOperation(String userid, Collection<PID> pids, IndexingActionType type) { String messageId = "urn:uuid:" + UUID.randomUUID().toString(); Document msg = new Document(); Element contentEl = createAtomEntry(msg, userid, pids.iterator().next(), JMSMessageUtil.CDRActions.INDEX.getName(), messageId); Element indexEl = new Element(type.getName(), CDR_MESSAGE_NS); contentEl.addContent(indexEl); Element subjects = new Element("subjects", CDR_MESSAGE_NS); indexEl.addContent(subjects); for (PID sub : pids) { subjects.addContent(new Element("pid", CDR_MESSAGE_NS).setText(sub.getPid())); } sendMessage(msg); return messageId; } private void sendMessage(Document msg) { XMLOutputter out = new XMLOutputter(); final String msgStr = out.outputString(msg); this.jmsTemplate.send(new MessageCreator() { @Override public Message createMessage(Session session) throws JMSException { return session.createTextMessage(msgStr); } }); } private Element createAtomEntry(Document msg, String userid, PID contextpid, String operation) { return createAtomEntry(msg, userid, contextpid, operation, "urn:uuid:" + UUID.randomUUID().toString()); } /** * @param msg * @param userid * @param pid * @return */ private Element createAtomEntry(Document msg, String userid, PID contextpid, String operation, String messageId) { Element entry = new Element("entry", ATOM_NS); msg.addContent(entry); entry.addContent(new Element("id", ATOM_NS).setText(messageId)); DateTimeFormatter fmt = ISODateTimeFormat.dateTime(); String timestamp = fmt.print(DateTimeUtils.currentTimeMillis()); entry.addContent(new Element("updated", ATOM_NS).setText(timestamp)); entry.addContent(new Element("author", ATOM_NS).addContent(new Element("name", ATOM_NS).setText(userid)) .addContent(new Element("uri", ATOM_NS).setText(CDR_MESSAGE_AUTHOR_URI))); entry.addContent(new Element("title", ATOM_NS).setText(operation).setAttribute("type", "text")); entry.addContent(new Element("summary", ATOM_NS).setText(contextpid.getPid()).setAttribute("type", "text")); Element content = new Element("content", ATOM_NS).setAttribute("type", "text/xml"); entry.addContent(content); return content; } public JmsTemplate getJmsTemplate() { return jmsTemplate; } public void setJmsTemplate(JmsTemplate jmsTemplate) { this.jmsTemplate = jmsTemplate; } }