org.argeo.server.jcr/src/org/argeo/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.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
  29 public class DefaultRepositoryRegister extends Observable implements
  30                 RepositoryRegister, ArgeoJcrConstants {
  31         private final static Log log = LogFactory
  32                         .getLog(DefaultRepositoryRegister.class);
  33
  34         /** Read only map which will be directly exposed. */
  35         private Map<String, Repository> repositories = Collections
  36                         .unmodifiableMap(new TreeMap<String, Repository>());
  37
  38         @SuppressWarnings("rawtypes")
  39         public synchronized Repository getRepository(Map parameters)
  40                         throws RepositoryException {
  41                 if (!parameters.containsKey(JCR_REPOSITORY_ALIAS))
  42                         throw new RepositoryException("Parameter " + JCR_REPOSITORY_ALIAS
  43                                         + " has to be defined.");
  44                 String alias = parameters.get(JCR_REPOSITORY_ALIAS).toString();
  45                 if (!repositories.containsKey(alias))
  46                         throw new RepositoryException(
  47                                         "No repository registered with alias " + alias);
  48
  49                 return repositories.get(alias);
  50         }
  51
  52         /** Access to the read-only map */
  53         public synchronized Map<String, Repository> getRepositories() {
  54                 return repositories;
  55         }
  56
  57         /** Registers a service, typically called when OSGi services are bound. */
  58         @SuppressWarnings("rawtypes")
  59         public synchronized void register(Repository repository, Map properties) {
  60                 String alias;
  61                 if (properties == null || !properties.containsKey(JCR_REPOSITORY_ALIAS)) {
  62                         log.warn("Cannot register a repository if no "
  63                                         + JCR_REPOSITORY_ALIAS + " property is specified.");
  64                         return;
  65                 }
  66                 alias = properties.get(JCR_REPOSITORY_ALIAS).toString();
  67                 Map<String, Repository> map = new TreeMap<String, Repository>(
  68                                 repositories);
  69                 map.put(alias, repository);
  70                 repositories = Collections.unmodifiableMap(map);
  71                 setChanged();
  72                 notifyObservers(alias);
  73         }
  74
  75         /** Unregisters a service, typically called when OSGi services are unbound. */
  76         @SuppressWarnings("rawtypes")
  77         public synchronized void unregister(Repository repository, Map properties) {
  78                 // TODO: also check bean name?
  79                 if (properties == null || !properties.containsKey(JCR_REPOSITORY_ALIAS)) {
  80                         log.warn("Cannot unregister a repository without property "
  81                                         + JCR_REPOSITORY_ALIAS);
  82                         return;
  83                 }
  84
  85                 String alias = properties.get(JCR_REPOSITORY_ALIAS).toString();
  86                 Map<String, Repository> map = new TreeMap<String, Repository>(
  87                                 repositories);
  88                 if (map.remove(alias) == null) {
  89                         log.warn("No repository was registered with alias " + alias);
  90                         return;
  91                 }
  92                 repositories = Collections.unmodifiableMap(map);
  93                 setChanged();
  94                 notifyObservers(alias);
  95         }
  96 }