/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jackrabbit.core;
import java.util.Map;
import java.util.HashMap;
import javax.jcr.Repository;
import javax.jcr.RepositoryException;
import javax.jcr.RepositoryFactory;
import org.apache.jackrabbit.api.JackrabbitRepository;
/**
* <code>RepositoryFactoryImpl</code> implements a repository factory that
* creates a {@link TransientRepository} on {@link #getRepository(Map)}.
*/
public class RepositoryFactoryImpl implements RepositoryFactory {
/**
* Name of the repository home parameter.
*/
public static final String REPOSITORY_HOME
= "org.apache.jackrabbit.repository.home";
/**
* Name of the repository configuration parameter.
*/
public static final String REPOSITORY_CONF
= "org.apache.jackrabbit.repository.conf";
/**
* Map of repository instances. Key = repository home, value = repository
* instance.
*/
private static final Map<String, JackrabbitRepository> REPOSITORY_INSTANCES = new HashMap<String, JackrabbitRepository>();
public Repository getRepository(Map parameters) throws RepositoryException {
JackrabbitRepository repo;
synchronized (REPOSITORY_INSTANCES) {
if (parameters == null) {
repo = getOrCreateRepository(null, null);
} else if (parameters.containsKey(REPOSITORY_CONF)
&& parameters.containsKey(REPOSITORY_HOME)) {
String conf = (String) parameters.get(REPOSITORY_CONF);
String home = (String) parameters.get(REPOSITORY_HOME);
repo = getOrCreateRepository(conf, home);
} else {
// unknown or insufficient parameters
repo = null;
}
}
return repo;
}
/**
* Either returns a cached repository or creates a repository instance and
* puts it into the {@link #REPOSITORY_INSTANCES} cache.
*
* @param conf path to the repository configuration file.
* @param home path to the repository home.
* @return the repository instance.
* @throws RepositoryException if an error occurs while creating the
* repository instance.
*/
private JackrabbitRepository getOrCreateRepository(String conf,
String home)
throws RepositoryException {
JackrabbitRepository repo = REPOSITORY_INSTANCES.get(home);
if (repo == null) {
if (home == null) {
repo = new TransientRepository();
} else {
repo = new TransientRepository(conf, home);
}
REPOSITORY_INSTANCES.put(home, repo);
}
return repo;
}
}