external/storm-cassandra/src/main/java/org/apache/storm/cassandra/trident/state/CassandraStateFactory.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The ASF licenses this file to you 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.storm.cassandra.trident.state;

import java.util.Map;
import org.apache.storm.cassandra.CassandraContext;
import org.apache.storm.cassandra.query.CQLResultSetValuesMapper;
import org.apache.storm.cassandra.query.CQLStatementTupleMapper;
import org.apache.storm.task.IMetricsContext;
import org.apache.storm.trident.state.State;
import org.apache.storm.trident.state.StateFactory;

public class CassandraStateFactory implements StateFactory {
    private final CassandraState.Options options;

    public CassandraStateFactory(CassandraState.Options options) {
        this.options = options;
    }

    public CassandraStateFactory(CQLStatementTupleMapper cqlStatementTupleMapper, CQLResultSetValuesMapper cqlResultSetValuesMapper) {
        this(new CassandraState.Options(new CassandraContext()).withCQLStatementTupleMapper(cqlStatementTupleMapper)
                                                               .withCQLResultSetValuesMapper(cqlResultSetValuesMapper));
    }

    @Override
    public State makeState(Map<String, Object> conf, IMetricsContext metrics, int partitionIndex, int numPartitions) {
        CassandraState cassandraState = new CassandraState(conf, options);
        cassandraState.prepare();

        return cassandraState;
    }
}