/*
* 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.data2.transaction.stream.leveldb;
import co.cask.cdap.api.dataset.DatasetContext;
import co.cask.cdap.api.dataset.DatasetProperties;
import co.cask.cdap.api.dataset.DatasetSpecification;
import co.cask.cdap.api.dataset.table.Table;
import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.data.stream.StreamUtils;
import co.cask.cdap.data2.dataset2.lib.table.inmemory.PrefixedNamespaces;
import co.cask.cdap.data2.dataset2.lib.table.leveldb.LevelDBTableAdmin;
import co.cask.cdap.data2.dataset2.lib.table.leveldb.LevelDBTableCore;
import co.cask.cdap.data2.dataset2.lib.table.leveldb.LevelDBTableDefinition;
import co.cask.cdap.data2.dataset2.lib.table.leveldb.LevelDBTableService;
import co.cask.cdap.data2.transaction.stream.StreamConfig;
import co.cask.cdap.data2.transaction.stream.StreamConsumerStateStore;
import co.cask.cdap.data2.transaction.stream.StreamConsumerStateStoreFactory;
import co.cask.cdap.data2.util.TableId;
import co.cask.cdap.proto.Id;
import com.google.inject.Inject;
import java.io.IOException;
/**
* Factory for creating {@link StreamConsumerStateStore} in level db.
*/
public final class LevelDBStreamConsumerStateStoreFactory implements StreamConsumerStateStoreFactory {
private final LevelDBTableService tableService;
private final CConfiguration cConf;
@Inject
LevelDBStreamConsumerStateStoreFactory(CConfiguration cConf, LevelDBTableService tableService) {
this.tableService = tableService;
this.cConf = cConf;
}
@Override
public synchronized StreamConsumerStateStore create(StreamConfig streamConfig) throws IOException {
Id.Namespace namespace = streamConfig.getStreamId().getNamespace();
TableId tableId = StreamUtils.getStateStoreTableId(namespace);
getLevelDBTableAdmin(tableId).create();
String levelDBTableName =
PrefixedNamespaces.namespace(cConf, tableId.getNamespace().getId(), tableId.getTableName());
LevelDBTableCore coreTable = new LevelDBTableCore(levelDBTableName, tableService);
return new LevelDBStreamConsumerStateStore(streamConfig, coreTable);
}
@Override
public synchronized void dropAllInNamespace(Id.Namespace namespace) throws IOException {
TableId tableId = StreamUtils.getStateStoreTableId(namespace);
getLevelDBTableAdmin(tableId).drop();
}
private LevelDBTableAdmin getLevelDBTableAdmin(TableId tableId) throws IOException {
DatasetProperties props = DatasetProperties.builder().add(Table.PROPERTY_COLUMN_FAMILY, "t").build();
LevelDBTableDefinition tableDefinition = new LevelDBTableDefinition("tableDefinition");
DatasetSpecification spec = tableDefinition.configure(tableId.getTableName(), props);
return new LevelDBTableAdmin(DatasetContext.from(tableId.getNamespace().getId()), spec, tableService, cConf);
}
}