/*
* Copyright © 2014 Cask Data, Inc.
*
* 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 co.cask.cdap.app.guice;
import co.cask.cdap.api.dataset.module.DatasetDefinitionRegistry;
import co.cask.cdap.api.dataset.module.DatasetModule;
import co.cask.cdap.app.store.ServiceStore;
import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.common.runtime.RuntimeModule;
import co.cask.cdap.data2.dataset2.DatasetDefinitionRegistryFactory;
import co.cask.cdap.data2.dataset2.DatasetFramework;
import co.cask.cdap.data2.dataset2.DefaultDatasetDefinitionRegistry;
import co.cask.cdap.data2.dataset2.InMemoryDatasetFramework;
import co.cask.cdap.data2.dataset2.lib.kv.HBaseKVTableDefinition;
import co.cask.cdap.data2.dataset2.lib.kv.InMemoryKVTableDefinition;
import co.cask.cdap.gateway.handlers.DatasetServiceStore;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Module;
import com.google.inject.PrivateModule;
import com.google.inject.Provider;
import com.google.inject.Scopes;
import com.google.inject.multibindings.MapBinder;
import com.google.inject.name.Named;
import com.google.inject.name.Names;
import java.util.Map;
/**
* ServiceStore Guice Modules.
*/
public class ServiceStoreModules extends RuntimeModule {
@Override
public Module getInMemoryModules() {
return new ServiceStoreModule(new InMemoryKVTableDefinition.Module());
}
@Override
public Module getStandaloneModules() {
return new ServiceStoreModule(new InMemoryKVTableDefinition.Module());
}
@Override
public Module getDistributedModules() {
return new ServiceStoreModule(new HBaseKVTableDefinition.Module());
}
private static final class ServiceStoreModule extends PrivateModule {
private final DatasetModule tableModule;
private ServiceStoreModule(DatasetModule tableModule) {
this.tableModule = tableModule;
}
@Override
protected void configure() {
// The ServiceStore uses a special non-TX KV Table.
MapBinder<String, DatasetModule> mapBinder = MapBinder.newMapBinder(binder(), String.class, DatasetModule.class,
Names.named("service.store.ds.modules"));
mapBinder.addBinding("basicKVTable").toInstance(tableModule);
// Need to use a provider here because there are cases which the binding for
// DatasetDefinitionRegistryFactory is defined publicly, hence cannot create private binding here
// Need to fix/reorganize all guice modules to make things work properly.
bind(DatasetFramework.class)
.annotatedWith(Names.named("local.ds.framework")).toProvider(DatasetFrameworkProvider.class);
bind(ServiceStore.class).to(DatasetServiceStore.class).in(Scopes.SINGLETON);
expose(ServiceStore.class);
}
}
/**
* A Guice provider for {@link DatasetFramework} with {@link InMemoryDatasetFramework} as implementation.
*/
private static final class DatasetFrameworkProvider implements Provider<DatasetFramework> {
private final Injector injector;
private final CConfiguration cConf;
private final Map<String, DatasetModule> datasetModules;
@Inject
private DatasetFrameworkProvider(Injector injector, CConfiguration cConf,
@Named("service.store.ds.modules") Map<String, DatasetModule> datasetModules) {
this.injector = injector;
this.cConf = cConf;
this.datasetModules = datasetModules;
}
@Override
public DatasetFramework get() {
DatasetDefinitionRegistryFactory registryFactory = new DatasetDefinitionRegistryFactory() {
@Override
public DatasetDefinitionRegistry create() {
DefaultDatasetDefinitionRegistry registry = new DefaultDatasetDefinitionRegistry();
injector.injectMembers(registry);
return registry;
}
};
return new InMemoryDatasetFramework(registryFactory, datasetModules, cConf);
}
}
}