org.argeo.cms.ui/src/org/argeo/cms/ui/jcr/DefaultRepositoryRegister.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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.cms.ui.jcr;
  17
  18 import java.util.Collections;
  19 import java.util.Map;
  20 import java.util.Observable;
  21 import java.util.TreeMap;
  22
  23 import javax.jcr.Repository;
  24 import javax.jcr.RepositoryException;
  25
  26 import org.apache.commons.logging.Log;
  27 import org.apache.commons.logging.LogFactory;
  28 import org.argeo.node.NodeConstants;
  29
  30 public class DefaultRepositoryRegister extends Observable implements RepositoryRegister {
  31         /** Key for a JCR repository alias */
  32         private final static String CN = NodeConstants.CN;
  33         /** Key for a JCR repository URI */
  34         // public final static String JCR_REPOSITORY_URI = "argeo.jcr.repository.uri";
  35         private final static Log log = LogFactory.getLog(DefaultRepositoryRegister.class);
  36
  37         /** Read only map which will be directly exposed. */
  38         private Map<String, Repository> repositories = Collections.unmodifiableMap(new TreeMap<String, Repository>());
  39
  40         @SuppressWarnings("rawtypes")
  41         public synchronized Repository getRepository(Map parameters) throws RepositoryException {
  42                 if (!parameters.containsKey(CN))
  43                         throw new RepositoryException("Parameter " + CN + " has to be defined.");
  44                 String alias = parameters.get(CN).toString();
  45                 if (!repositories.containsKey(alias))
  46                         throw new RepositoryException("No repository registered with alias " + alias);
  47
  48                 return repositories.get(alias);
  49         }
  50
  51         /** Access to the read-only map */
  52         public synchronized Map<String, Repository> getRepositories() {
  53                 return repositories;
  54         }
  55
  56         /** Registers a service, typically called when OSGi services are bound. */
  57         @SuppressWarnings("rawtypes")
  58         public synchronized void register(Repository repository, Map properties) {
  59                 String alias;
  60                 if (properties == null || !properties.containsKey(CN)) {
  61                         log.warn("Cannot register a repository if no " + CN + " property is specified.");
  62                         return;
  63                 }
  64                 alias = properties.get(CN).toString();
  65                 Map<String, Repository> map = new TreeMap<String, Repository>(repositories);
  66                 map.put(alias, repository);
  67                 repositories = Collections.unmodifiableMap(map);
  68                 setChanged();
  69                 notifyObservers(alias);
  70         }
  71
  72         /** Unregisters a service, typically called when OSGi services are unbound. */
  73         @SuppressWarnings("rawtypes")
  74         public synchronized void unregister(Repository repository, Map properties) {
  75                 // TODO: also check bean name?
  76                 if (properties == null || !properties.containsKey(CN)) {
  77                         log.warn("Cannot unregister a repository without property " + CN);
  78                         return;
  79                 }
  80
  81                 String alias = properties.get(CN).toString();
  82                 Map<String, Repository> map = new TreeMap<String, Repository>(repositories);
  83                 if (map.remove(alias) == null) {
  84                         log.warn("No repository was registered with alias " + alias);
  85                         return;
  86                 }
  87                 repositories = Collections.unmodifiableMap(map);
  88                 setChanged();
  89                 notifyObservers(alias);
  90         }
  91 }