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.Arrays;
   5 import java.util.List;
   6
   7 import javax.jcr.Node;
   8 import javax.jcr.Repository;
   9 import javax.jcr.RepositoryException;
  10 import javax.jcr.Session;
  11 import javax.jcr.observation.Event;
  12 import javax.jcr.observation.EventIterator;
  13 import javax.jcr.observation.EventListener;
  14
  15 import org.argeo.jcr.JcrUtils;
  16 import org.argeo.slc.SlcException;
  17
  18 /** Repository backend, maintain the JCR repository, mainly through listeners */
  19 public class RepoImpl {
  20
  21         private Repository jcrRepository;
  22         private Session adminSession;
  23
  24         private ArtifactListener artifactListener;
  25
  26         /** order may be important */
  27         private List<NodeIndexer> nodeIndexers = new ArrayList<NodeIndexer>();
  28
  29         public void init() {
  30                 try {
  31                         adminSession = jcrRepository.login();
  32                         artifactListener = new ArtifactListener();
  33                         adminSession
  34                                         .getWorkspace()
  35                                         .getObservationManager()
  36                                         .addEventListener(artifactListener, Event.NODE_ADDED,
  37                                                         RepoConstants.ARTIFACTS_BASE_PATH, true, null,
  38                                                         null, true);
  39                         // localrepo
  40                         String localrepoWorkspace = "localrepo";
  41                         if (!Arrays.asList(
  42                                         adminSession.getWorkspace().getAccessibleWorkspaceNames())
  43                                         .contains(localrepoWorkspace))
  44                                 adminSession.getWorkspace().createWorkspace(localrepoWorkspace);
  45                 } catch (RepositoryException e) {
  46                         throw new SlcException("Cannot initialize repository backend", e);
  47                 }
  48         }
  49
  50         public void destroy() {
  51                 JcrUtils.logoutQuietly(adminSession);
  52         }
  53
  54         public void setJcrRepository(Repository jcrRepository) {
  55                 this.jcrRepository = jcrRepository;
  56         }
  57
  58         public void setNodeIndexers(List<NodeIndexer> nodeIndexers) {
  59                 this.nodeIndexers = nodeIndexers;
  60         }
  61
  62         class ArtifactListener implements EventListener {
  63
  64                 public void onEvent(EventIterator events) {
  65                         while (events.hasNext()) {
  66                                 Event event = events.nextEvent();
  67                                 try {
  68                                         String newNodePath = event.getPath();
  69                                         Node newNode = null;
  70                                         for (NodeIndexer nodeIndexer : nodeIndexers) {
  71                                                 try {
  72                                                         if (nodeIndexer.support(newNodePath)) {
  73                                                                 if (newNode == null)
  74                                                                         newNode = adminSession.getNode(newNodePath);
  75                                                                 nodeIndexer.index(newNode);
  76                                                         }
  77                                                 } catch (RuntimeException e) {
  78                                                         e.printStackTrace();
  79                                                         throw e;
  80                                                 }
  81                                         }
  82                                         if (newNode != null)
  83                                                 adminSession.save();
  84                                 } catch (RepositoryException e) {
  85                                         throw new SlcException("Cannot process event " + event, e);
  86                                 } finally {
  87                                         JcrUtils.discardQuietly(adminSession);
  88                                 }
  89                         }
  90
  91                 }
  92
  93         }
  94
  95 }