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

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.repo;
  17
  18 import java.util.ArrayList;
  19 import java.util.Arrays;
  20 import java.util.List;
  21
  22 import javax.jcr.Node;
  23 import javax.jcr.Repository;
  24 import javax.jcr.RepositoryException;
  25 import javax.jcr.Session;
  26 import javax.jcr.observation.Event;
  27 import javax.jcr.observation.EventIterator;
  28 import javax.jcr.observation.EventListener;
  29
  30 import org.argeo.jcr.JcrUtils;
  31 import org.argeo.slc.SlcException;
  32
  33 /** Repository backend, maintain the JCR repository, mainly through listeners */
  34 public class RepoImpl {
  35
  36         private Repository jcrRepository;
  37         private Session adminSession;
  38
  39         private ArtifactListener artifactListener;
  40
  41         /** order may be important */
  42         private List<NodeIndexer> nodeIndexers = new ArrayList<NodeIndexer>();
  43
  44         public void init() {
  45                 try {
  46                         adminSession = jcrRepository.login();
  47                         artifactListener = new ArtifactListener();
  48                         adminSession
  49                                         .getWorkspace()
  50                                         .getObservationManager()
  51                                         .addEventListener(artifactListener, Event.NODE_ADDED,
  52                                                         RepoConstants.ARTIFACTS_BASE_PATH, true, null,
  53                                                         null, true);
  54                         // localrepo
  55                         String localrepoWorkspace = "localrepo";
  56                         if (!Arrays.asList(
  57                                         adminSession.getWorkspace().getAccessibleWorkspaceNames())
  58                                         .contains(localrepoWorkspace))
  59                                 adminSession.getWorkspace().createWorkspace(localrepoWorkspace);
  60                 } catch (RepositoryException e) {
  61                         throw new SlcException("Cannot initialize repository backend", e);
  62                 }
  63         }
  64
  65         public void destroy() {
  66                 JcrUtils.logoutQuietly(adminSession);
  67         }
  68
  69         public void setJcrRepository(Repository jcrRepository) {
  70                 this.jcrRepository = jcrRepository;
  71         }
  72
  73         public void setNodeIndexers(List<NodeIndexer> nodeIndexers) {
  74                 this.nodeIndexers = nodeIndexers;
  75         }
  76
  77         class ArtifactListener implements EventListener {
  78
  79                 public void onEvent(EventIterator events) {
  80                         while (events.hasNext()) {
  81                                 Event event = events.nextEvent();
  82                                 try {
  83                                         String newNodePath = event.getPath();
  84                                         Node newNode = null;
  85                                         for (NodeIndexer nodeIndexer : nodeIndexers) {
  86                                                 try {
  87                                                         if (nodeIndexer.support(newNodePath)) {
  88                                                                 if (newNode == null)
  89                                                                         newNode = adminSession.getNode(newNodePath);
  90                                                                 nodeIndexer.index(newNode);
  91                                                         }
  92                                                 } catch (RuntimeException e) {
  93                                                         e.printStackTrace();
  94                                                         throw e;
  95                                                 }
  96                                         }
  97                                         if (newNode != null)
  98                                                 adminSession.save();
  99                                 } catch (RepositoryException e) {
 100                                         throw new SlcException("Cannot process event " + event, e);
 101                                 } finally {
 102                                         JcrUtils.discardQuietly(adminSession);
 103                                 }
 104                         }
 105
 106                 }
 107
 108         }
 109
 110 }