runtime/org.argeo.slc.repo/src/main/java/org/argeo/slc/repo/RepoImpl.java

   1 package org.argeo.slc.repo;
   2
   3 import java.util.ArrayList;
   4 import java.util.List;
   5
   6 import javax.jcr.Node;
   7 import javax.jcr.Repository;
   8 import javax.jcr.RepositoryException;
   9 import javax.jcr.Session;
  10 import javax.jcr.observation.Event;
  11 import javax.jcr.observation.EventIterator;
  12 import javax.jcr.observation.EventListener;
  13
  14 import org.argeo.jcr.JcrUtils;
  15 import org.argeo.slc.SlcException;
  16
  17 /** Repository backend, maintain the JCR repository, mainly through listeners */
  18 public class RepoImpl {
  19
  20         private Repository jcrRepository;
  21         private Session adminSession;
  22
  23         private ArtifactListener artifactListener;
  24
  25         /** order may be important */
  26         private List<NodeIndexer> nodeIndexers = new ArrayList<NodeIndexer>();
  27
  28         public void init() {
  29                 try {
  30                         adminSession = jcrRepository.login();
  31                         artifactListener = new ArtifactListener();
  32                         adminSession
  33                                         .getWorkspace()
  34                                         .getObservationManager()
  35                                         .addEventListener(artifactListener, Event.NODE_ADDED,
  36                                                         RepoConstants.ARTIFACTS_BASE_PATH, true, null,
  37                                                         null, true);
  38                 } catch (RepositoryException e) {
  39                         throw new SlcException("Cannot initialize repository backend", e);
  40                 }
  41         }
  42
  43         public void destroy() {
  44                 JcrUtils.logoutQuietly(adminSession);
  45         }
  46
  47         public void setJcrRepository(Repository jcrRepository) {
  48                 this.jcrRepository = jcrRepository;
  49         }
  50
  51         public void setNodeIndexers(List<NodeIndexer> nodeIndexers) {
  52                 this.nodeIndexers = nodeIndexers;
  53         }
  54
  55         class ArtifactListener implements EventListener {
  56
  57                 public void onEvent(EventIterator events) {
  58                         while (events.hasNext()) {
  59                                 Event event = events.nextEvent();
  60                                 try {
  61                                         String newNodePath = event.getPath();
  62                                         Node newNode = null;
  63                                         for (NodeIndexer nodeIndexer : nodeIndexers) {
  64                                                 try {
  65                                                         if (nodeIndexer.support(newNodePath)) {
  66                                                                 if (newNode == null)
  67                                                                         newNode = adminSession.getNode(newNodePath);
  68                                                                 nodeIndexer.index(newNode);
  69                                                         }
  70                                                 } catch (RuntimeException e) {
  71                                                         e.printStackTrace();
  72                                                         throw e;
  73                                                 }
  74                                         }
  75                                         if (newNode != null)
  76                                                 adminSession.save();
  77                                 } catch (RepositoryException e) {
  78                                         throw new SlcException("Cannot process event " + event, e);
  79                                 } finally {
  80                                         JcrUtils.discardQuietly(adminSession);
  81                                 }
  82                         }
  83
  84                 }
  85
  86         }
  87
  88 }