com.splicemachine.test_tools.TableCreator.java Source code

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Here is the source code for com.splicemachine.test_tools.TableCreator.java

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/*
 * Copyright 2012 - 2016 Splice Machine, 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 com.splicemachine.test_tools;

import org.spark_project.guava.collect.Lists;
import org.apache.commons.dbutils.DbUtils;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.List;

import static org.spark_project.guava.base.Preconditions.checkState;

/**
 * Create tables and optionally insert data.
 *
 * <pre>
 *
 * new TableCreator(conn)
 *      .withCreate("create table t1(a int)")
 *      .withInsert("insert into t1 value(?)")
 *      .withRows(new MyRowProvider()).build();
 *
 * </pre>
 *
 * Or reuse the builder to create multiple similar tables:
 *
 * <pre>
 *
 * TableCreator tc = new TableCreator(conn)
 *      .withCreate("create table %s (a int)")
 *      .withInsert("insert into %s value(?)")
 *      .withRows(new MyRowProvider()).build();
 *
 * tc.withTableName("t1").create();
 * tc.withTableName("t2").create();
 * tc.withTableName("t3").create();
 *
 * </pre>
 */
public class TableCreator {

    private Connection connection;
    private String tableName;
    private String createSql;
    private String insertSql;
    private List<String> indexSqlList = Lists.newArrayList();
    private RowCreator rowCreator;
    private String constraints;

    public TableCreator(Connection connection) {
        this.connection = connection;
    }

    public TableCreator withTableName(String tableName) {
        this.tableName = tableName;
        return this;
    }

    public TableCreator withConstraints(String constraints) {
        this.constraints = constraints;
        return this;
    }

    public TableCreator withCreate(String sql) {
        this.createSql = sql;
        return this;
    }

    public TableCreator withInsert(String sql) {
        this.insertSql = sql;
        return this;
    }

    public TableCreator withIndex(String sql) {
        this.indexSqlList.add(sql);
        return this;
    }

    public TableCreator withRows(Iterable<Iterable<Object>> rowProvider) {
        this.rowCreator = new IterableRowCreator(rowProvider);
        return this;
    }

    public TableCreator withRows(RowCreator rowProvider) {
        this.rowCreator = rowProvider;
        return this;
    }

    public void create() throws SQLException {
        createTable();
        createIndexes();
        if (rowCreator != null) {
            checkState(insertSql != null, "must provide insert statement if providing rows");
            insertRows();
        }
    }

    private void createTable() throws SQLException {
        String baseSql = createSql;
        if (constraints != null) {
            int lastParenthesis = baseSql.lastIndexOf(")");
            baseSql = baseSql.substring(0, lastParenthesis) + "," + constraints + ")";
        }
        String CREATE_SQL = tableName != null ? String.format(baseSql, tableName) : baseSql;
        Statement statement = connection.createStatement();
        try {
            statement.execute(CREATE_SQL);
        } finally {
            DbUtils.close(statement);
        }
    }

    private void createIndexes() throws SQLException {
        for (String indexSql : indexSqlList) {
            String INDEX_SQL = tableName == null ? indexSql : String.format(indexSql, tableName);
            Statement statement = connection.createStatement();
            try {
                statement.execute(INDEX_SQL);
            } finally {
                DbUtils.close(statement);
            }
        }
    }

    private void insertRows() throws SQLException {
        String insertSql = tableName == null ? this.insertSql : String.format(this.insertSql, tableName);
        int batchSize = rowCreator.batchSize();
        rowCreator.reset();
        try (PreparedStatement ps = connection.prepareStatement(insertSql)) {
            if (batchSize > 1) {
                int size = 0;
                while (rowCreator.advanceRow()) {
                    rowCreator.setRow(ps);
                    ps.addBatch();
                    size++;
                    if ((size % batchSize) == 0) {
                        ps.executeBatch();
                    }
                }
            } else {
                while (rowCreator.advanceRow()) {
                    rowCreator.setRow(ps);
                    ps.execute();
                }

            }
        }
    }
}