/*
 *
 *  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.flink.connector.phoenix.internal.executor;

import static org.apache.flink.util.Preconditions.checkNotNull;

import org.apache.flink.connector.phoenix.internal.converter.JdbcRowConverter;
import org.apache.flink.connector.phoenix.statement.FieldNamedPreparedStatement;
import org.apache.flink.connector.phoenix.statement.StatementFactory;
import org.apache.flink.table.data.RowData;

import java.sql.Connection;
import java.sql.SQLException;

/**
 * A {@link JdbcBatchStatementExecutor} that simply adds the records into batches of {@link
 * java.sql.PreparedStatement} and doesn't buffer records in memory. Only used in Table/SQL API.
 */
public final class TableSimpleStatementExecutor implements JdbcBatchStatementExecutor<RowData> {

    private final StatementFactory stmtFactory;
    private final JdbcRowConverter converter;

    private transient FieldNamedPreparedStatement st;

    /**
     * Keep in mind object reuse: if it's on then key extractor may be required to return new
     * object.
     */
    public TableSimpleStatementExecutor(StatementFactory stmtFactory, JdbcRowConverter converter) {
        this.stmtFactory = checkNotNull(stmtFactory);
        this.converter = checkNotNull(converter);
    }

    @Override
    public void prepareStatements(Connection connection) throws SQLException {
        st = stmtFactory.createStatement(connection);
    }

    @Override
    public void addToBatch(RowData record) throws SQLException {
        converter.toExternal(record, st);
        st.addBatch();
    }

    @Override
    public void executeBatch(Connection conn) throws SQLException {
        //st.executeBatch();
        conn.commit();
    }

    @Override
    public void closeStatements() throws SQLException {
        if (st != null) {
            st.close();
            st = null;
        }
    }
}
