/*
* 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.api.dataset.lib;
import co.cask.cdap.api.annotation.Beta;
import co.cask.cdap.api.dataset.DatasetAdmin;
import co.cask.cdap.api.dataset.DatasetDefinition;
import co.cask.cdap.api.dataset.DatasetProperties;
import co.cask.cdap.api.dataset.DatasetSpecification;
import co.cask.cdap.api.dataset.table.Table;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import java.io.IOException;
import java.util.Map;
/**
* DatasetDefinition for {@link IndexedObjectStore}.
*/
@Beta
public class IndexedObjectStoreDefinition
extends AbstractDatasetDefinition<IndexedObjectStore, DatasetAdmin> {
private final DatasetDefinition<? extends Table, ?> tableDef;
private final DatasetDefinition<? extends ObjectStore, ?> objectStoreDef;
public IndexedObjectStoreDefinition(String name,
DatasetDefinition<? extends Table, ?> tableDef,
DatasetDefinition<? extends ObjectStore, ?> objectStoreDef) {
super(name);
Preconditions.checkArgument(tableDef != null, "Table definition is required");
Preconditions.checkArgument(objectStoreDef != null, "ObjectStore definition is required");
this.tableDef = tableDef;
this.objectStoreDef = objectStoreDef;
}
@Override
public DatasetSpecification configure(String instanceName, DatasetProperties properties) {
return DatasetSpecification.builder(instanceName, getName())
.properties(properties.getProperties())
.datasets(tableDef.configure("index", properties),
objectStoreDef.configure("data", properties))
.build();
}
@Override
public DatasetAdmin getAdmin(DatasetSpecification spec, ClassLoader classLoader) throws IOException {
return new CompositeDatasetAdmin(Lists.newArrayList(
tableDef.getAdmin(spec.getSpecification("index"), classLoader),
objectStoreDef.getAdmin(spec.getSpecification("data"), classLoader)
));
}
@Override
public IndexedObjectStore<?> getDataset(DatasetSpecification spec,
Map<String, String> arguments, ClassLoader classLoader) throws IOException {
DatasetSpecification tableSpec = spec.getSpecification("index");
DatasetSpecification objectStoreSpec = spec.getSpecification("data");
Table index = tableDef.getDataset(tableSpec, arguments, classLoader);
ObjectStore<?> objectStore = objectStoreDef.getDataset(objectStoreSpec, arguments, classLoader);
return new IndexedObjectStore(spec.getName(), objectStore, index);
}
}