| /** |
| * 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. |
| */ |
| package org.apache.aurora.scheduler; |
| |
| import java.util.Set; |
| |
| import javax.inject.Singleton; |
| |
| import com.google.common.util.concurrent.Service; |
| import com.google.common.util.concurrent.ServiceManager; |
| import com.google.inject.AbstractModule; |
| import com.google.inject.Binder; |
| import com.google.inject.Provides; |
| import com.google.inject.binder.LinkedBindingBuilder; |
| import com.google.inject.multibindings.Multibinder; |
| |
| import org.apache.aurora.GuavaUtils; |
| import org.apache.aurora.GuavaUtils.LifecycleShutdownListener; |
| import org.apache.aurora.GuavaUtils.ServiceManagerIface; |
| import org.apache.aurora.scheduler.SchedulerLifecycle.SchedulerActive; |
| |
| /** |
| * Coordinates scheduler startup. |
| */ |
| public class SchedulerServicesModule extends AbstractModule { |
| /** |
| * Register a Service to run as close as possible to app startup. |
| * |
| * Usage: {@code addAppStartupServiceBinding(binder()).to(YourService.class)}. |
| * |
| * @param binder Binder for the current non-private module. |
| * @return a linked binding builder with the normal Guice EDSL methods. |
| */ |
| public static LinkedBindingBuilder<Service> addAppStartupServiceBinding(Binder binder) { |
| return Multibinder.newSetBinder(binder, Service.class, AppStartup.class).addBinding(); |
| } |
| |
| /** |
| * Register a Service to run after storage is ready, but before the scheduler has announced |
| * leadership. If this service fails to startup the scheduler will abort. |
| * |
| * Usage: {@code addSchedulerActiveServiceBinding(binder()).to(YourService.class)}. |
| * |
| * @param binder Binder for the current non-private module. |
| * @return a linked binding builder with the normal Guice EDSL methods. |
| */ |
| public static LinkedBindingBuilder<Service> addSchedulerActiveServiceBinding(Binder binder) { |
| return Multibinder.newSetBinder(binder, Service.class, SchedulerActive.class).addBinding(); |
| } |
| |
| @Override |
| protected void configure() { |
| // Add a binding. |
| Multibinder.newSetBinder(binder(), Service.class, AppStartup.class); |
| Multibinder.newSetBinder(binder(), Service.class, SchedulerActive.class); |
| } |
| |
| @Provides |
| @Singleton |
| @AppStartup |
| ServiceManagerIface provideAppStartupServiceManager( |
| @AppStartup Set<Service> services, |
| LifecycleShutdownListener listener) { |
| |
| ServiceManager manager = new ServiceManager(services); |
| manager.addListener(listener); |
| return GuavaUtils.serviceManager(manager); |
| } |
| |
| @Provides |
| @Singleton |
| @SchedulerActive |
| ServiceManagerIface provideSchedulerActiveServiceManager( |
| @SchedulerActive Set<Service> services, |
| LifecycleShutdownListener listener) { |
| |
| ServiceManager manager = new ServiceManager(services); |
| manager.addListener(listener); |
| return GuavaUtils.serviceManager(manager); |
| } |
| } |