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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: BoundedChannel.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;

/**
 * A channel that is known to have a capacity, signifying
 * that put operations may block when the
 * capacity is reached. Various implementations may have
 * intrinsically hard-wired capacities, capacities that are fixed upon
 * construction, or dynamically adjustable capacities.
 * @see DefaultChannelCapacity
 * [ Introduction to this package. ] 
 * 
 * @author Doug Lea
 * @author Last changed by: $Author$
 * @version $Revision$ $Date$
 * @since ? (pre 2.1)
 * 
 */
public interface BoundedChannel extends Channel {
  /** 
   * Return the maximum number of elements that can be held.
   * @return the capacity of this channel.
   **/
  public int capacity();
}