HSQLDB example source code file (TestStressInsert.java)

This example HSQLDB source code file (TestStressInsert.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - HSQLDB tags/keywords

a, a, data, exception, exception, id, initializing, jdbc, max_size, random, resultset, sql, string, string, teststressinsert, teststressinsert, util

The HSQLDB TestStressInsert.java source code

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.test;

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Random;

import org.hsqldb.jdbc.jdbcDataSource;

/**
 * Test with small cache and very large row inserts
 */
public class TestStressInsert {

    private Connection        con;
    private PreparedStatement insertStmt;
    private static final int  MAX_SIZE = 800000;
    private final Random      random   = new Random(0);
    byte[]                    data     = getRandomBytes(MAX_SIZE);

    public void init() throws Exception {

        String driver = "org.hsqldb.jdbcDriver";
        String url    = "jdbc:hsqldb:file:testing/test";

        jdbcDataSource dataSource = new jdbcDataSource();

        dataSource.setDatabase(url);

        con = dataSource.getConnection("sa", "");

        con.setAutoCommit(true);

        // set cache sizes
        Statement stmt = con.createStatement();

        try {

//            stmt.execute("set property \"hsqldb.nio_data_file\" false");
            stmt.execute("set property \"hsqldb.cache_scale\" 8");
            stmt.execute("set property \"hsqldb.cache_size_scale\" 10");
            stmt.execute("set write_delay 0");
            stmt.execute("set logsize " + 100);

            DatabaseMetaData metaData = con.getMetaData();
            ResultSet        rs = metaData.getTables(null, null, "A", null);
            boolean          schemaExists;

            try {
                schemaExists = rs.next();
            } finally {
                rs.close();
            }

            if (!schemaExists) {
                stmt.execute(
                    "create cached table A (ID binary(16) PRIMARY KEY, DATA varbinary not null)");
            }

            stmt.execute("checkpoint");
        } finally {
            stmt.close();
        }

        // prepare statements
        insertStmt =
            con.prepareStatement("insert into A (DATA, ID) values (?, ?)");
    }

    public void shutdown() throws Exception {
        insertStmt.close();
        con.close();
    }

    public void insert(byte[] id) throws Exception {

        try {
            insertStmt.setBytes(1, data);
            insertStmt.setBytes(2, id);
            insertStmt.execute();
        } finally {
            insertStmt.clearParameters();
            insertStmt.clearWarnings();
        }
    }

    public static void main(String[] args) {

        try {
            TestStressInsert test = new TestStressInsert();
            long             t1   = System.currentTimeMillis();

            System.out.print("Initializing...");
            test.init();

            long t2 = System.currentTimeMillis();

            System.out.println("done " + (t2 - t1));

            for (int i = 0; i < MAX_SIZE; i++) {
                test.insert(test.getRandomBytes(16));

                if (i % 100 == 0) {
                    long t3 = System.currentTimeMillis();

                    System.out.println("inserted " + i + " in " + (t3 - t2));

                    t2 = t3;
                }
            }

            test.shutdown();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private byte[] getRandomBytes(int length) {

        byte[] ret = new byte[length];

        random.nextBytes(ret);

        return ret;
    }
}