package act.db;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* Licensed 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.
* #L%
*/
import act.util.DestroyableBase;
import org.osgl.$;
import org.osgl.util.C;
import java.util.Map;
public class DbManager extends DestroyableBase {
private Map<String, DbPlugin> plugins = C.newMap();
private Map<Class, TimestampGenerator> timestampGeneratorMap = C.newMap();
synchronized void register(DbPlugin plugin) {
plugins.put(plugin.getClass().getCanonicalName(), plugin);
}
synchronized void register(TimestampGenerator timestampGenerator) {
timestampGeneratorMap.put(timestampGenerator.timestampType(), timestampGenerator);
}
public synchronized DbPlugin plugin(String type) {
return plugins.get(type);
}
public synchronized boolean hasPlugin() {
return !plugins.isEmpty();
}
public synchronized <TIMESTAMP_TYPE> TimestampGenerator<TIMESTAMP_TYPE> timestampGenerator(Class<? extends TIMESTAMP_TYPE> c) {
return $.cast(timestampGeneratorMap.get(c));
}
/**
* Returns the plugin if there is only One plugin inside
* the register, otherwise return {@code null}
*/
public synchronized DbPlugin theSolePlugin() {
if (plugins.size() == 1) {
return plugins.values().iterator().next();
} else {
return null;
}
}
}