io.cdap.cdap.metadata.ApplicationDetailFetcherProvider Maven / Gradle / Ivy
/*
* Copyright © 2020 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 io.cdap.cdap.metadata;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Provider;
import io.cdap.cdap.common.conf.CConfiguration;
import io.cdap.cdap.common.conf.Constants;
/**
* Provider for {@link PreferencesFetcher}.
* Use {@link RemotePreferencesFetcherInternal} if storage implication is {@link Constants.Dataset#DATA_STORAGE_NOSQL},
* otherwise use {@link LocalPreferencesFetcherInternal}.
*/
public class ApplicationDetailFetcherProvider implements Provider {
private final CConfiguration cConf;
private final Injector injector;
@Inject
ApplicationDetailFetcherProvider(CConfiguration cConf, Injector injector) {
this.cConf = cConf;
this.injector = injector;
}
@Override
public ApplicationDetailFetcher get() {
String storageImpl = cConf.get(Constants.Dataset.DATA_STORAGE_IMPLEMENTATION);
if (storageImpl == null) {
throw new IllegalStateException("No storage implementation is specified in the configuration file");
}
storageImpl = storageImpl.toLowerCase();
if (storageImpl.equals(Constants.Dataset.DATA_STORAGE_NOSQL)) {
return injector.getInstance(RemoteApplicationDetailFetcher.class);
}
return injector.getInstance(LocalApplicationDetailFetcher.class);
}
}