package act.app;
/*-
* #%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.Destroyable;
import act.app.event.AppEventId;
import org.osgl.$;
import javax.enterprise.context.ApplicationScoped;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* provides service for app to get singleton instance by type
*/
public class SingletonRegistry extends AppServiceBase<SingletonRegistry> {
private ConcurrentMap<Class<?>, Object> registry = new ConcurrentHashMap<Class<?>, Object>();
private ConcurrentHashMap<Class<?>, Class<?>> preRegistry = new ConcurrentHashMap<Class<?>, Class<?>>();
private boolean batchRegistered = false;
SingletonRegistry(App app) {
super(app, false);
}
synchronized void register(final Class<?> singletonClass) {
if (!batchRegistered) {
if (preRegistry.isEmpty()) {
app().jobManager().on(AppEventId.DEPENDENCY_INJECTOR_PROVISIONED, "register-singleton-instances", new Runnable() {
@Override
public void run() {
doRegister();
}
}, true);
}
preRegistry.put(singletonClass, singletonClass);
} else {
register(singletonClass, app().getInstance(singletonClass));
}
}
public void register(Class singletonClass, Object singleton) {
registry.put(singletonClass, singleton);
}
synchronized <T> T get(Class<T> singletonClass) {
return $.cast(registry.get(singletonClass));
}
@Override
protected void releaseResources() {
Destroyable.Util.tryDestroyAll(registry.values(), ApplicationScoped.class);
registry.clear();
}
private void doRegister() {
batchRegistered = true;
for (Class<?> c : preRegistry.keySet()) {
registry.put(c, app().getInstance(c));
}
preRegistry.clear();
}
}