JDBCScalabilityConnection.java

package org.prevayler.demos.scalability.jdbc;
import org.prevayler.demos.scalability.*;
import java.sql.*;

abstract class JDBCScalabilityConnection {
  protected final Connection connection;
  private final PreparedStatement insertStatement;
  protected JDBCScalabilityConnection(  Connection connection){
    this.connection=connection;
    try {
      connection.setAutoCommit(false);
    }
 catch (    SQLException sqlx) {
      dealWithSQLException(sqlx,"setting AutoCommit to false");
    }
    insertStatement=prepare("insert into " + table() + " (ID,NAME,STRING1,BIGDECIMAL1,BIGDECIMAL2,DATE1,DATE2) values(?,?,?,?,?,?,?)");
  }
  protected abstract String table();
  protected void insert(  Record recordToInsert){
    try {
      insertStatement.setLong(1,recordToInsert.getId());
      insertStatement.setString(2,recordToInsert.getName());
      insertStatement.setString(3,recordToInsert.getString1());
      insertStatement.setBigDecimal(4,recordToInsert.getBigDecimal1());
      insertStatement.setBigDecimal(5,recordToInsert.getBigDecimal2());
      insertStatement.setDate(6,new java.sql.Date(recordToInsert.getDate1().getTime()));
      insertStatement.setDate(7,new java.sql.Date(recordToInsert.getDate2().getTime()));
      insertStatement.execute();
    }
 catch (    SQLException sqlx) {
      dealWithSQLException(sqlx,"inserting record");
    }
  }
  protected PreparedStatement prepare(  String statement){
    try {
      return connection.prepareStatement(statement);
    }
 catch (    SQLException sqlx) {
      dealWithSQLException(sqlx,"preparing statement: " + statement);
      return null;
    }
  }
  void replaceAllRecords(  int records){
    RecordIterator newRecords=new RecordIterator(records);
    try {
      connection.createStatement().execute("delete from " + table());
    }
 catch (    SQLException sqlx) {
      dealWithSQLException(sqlx,"deleting all records from " + table());
    }
    while (newRecords.hasNext()) {
      insert(newRecords.next());
    }
    try {
      connection.commit();
    }
 catch (    SQLException sqlx) {
      dealWithSQLException(sqlx,"commiting insertion of test records");
    }
  }
  static protected void dealWithSQLException(  SQLException sqlx,  String duringOperation){
    sqlx.printStackTrace();
    throw new RuntimeException("SQLException " + duringOperation + ".");
  }
}