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dbUnit is a JUnit extension (also usable from Ant and Maven) targeted for database-driven projects that, among other things, puts your database into a known state between test runs. This is an excellent way to avoid the myriad of problems that can occur when one test case corrupts the database and causes subsequent tests to fail or exacerbate the damage.

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/*
  File: DefaultChannelCapacity.java

  Originally written by Doug Lea and released into the public domain.
  This may be used for any purposes whatsoever without acknowledgment.
  Thanks for the assistance and support of Sun Microsystems Labs,
  and everyone contributing, testing, and using this code.

  History:
  Date       Who                What
  11Jun1998  dl               Create public version
*/

package org.dbunit.util.concurrent;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A utility class to set the default capacity of
 * BoundedChannel
 * implementations that otherwise require a capacity argument
 * @see BoundedChannel
 * [ Introduction to this package. ] 
 * 
 * @author Doug Lea
 * @author Last changed by: $Author$
 * @version $Revision$ $Date$
 * @since ? (pre 2.1)
 */
public class DefaultChannelCapacity {

    /**
     * Logger for this class
     */
    private static final Logger logger = LoggerFactory.getLogger(DefaultChannelCapacity.class);

  /** The initial value of the default capacity is 1024 **/
  public static final int INITIAL_DEFAULT_CAPACITY = 1024;

  /**  the current default capacity **/
  private static final SynchronizedInt defaultCapacity_ = 
    new SynchronizedInt(INITIAL_DEFAULT_CAPACITY);

  /**
   * Set the default capacity used in 
   * default (no-argument) constructor for BoundedChannels
   * that otherwise require a capacity argument.
   * @exception IllegalArgumentException if capacity less or equal to zero
   */
  public static void set(int capacity) {
    logger.debug("set(capacity={}) - start", String.valueOf(capacity));
    if (capacity <= 0) throw new IllegalArgumentException();
    defaultCapacity_.set(capacity);
  }

  /**
   * Get the default capacity used in 
   * default (no-argument) constructor for BoundedChannels
   * that otherwise require a capacity argument.
   * Initial value is INITIAL_DEFAULT_CAPACITY
   * @see #INITIAL_DEFAULT_CAPACITY
   */
  public static int get() {
    return defaultCapacity_.get();
  }
}