content: /*
   * Copyright (c) 2013 - 2014, Allen A. George <allen dot george at gmail dot com>
   *
   * 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 libraft 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 THE COPYRIGHT HOLDER 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 io.libraft.agent.configuration;
  
  import javax.validation.Constraint;
  import javax.validation.Payload;
  import java.lang.annotation.Documented;
  import java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  /**
   * Custom Hibernate Validator constraint annotation for
   * validating the minimum number of log entries to snapshot.
   * This constraint checks that the annotated value is
   * either set to {@link io.libraft.algorithm.RaftConstants#SNAPSHOTS_DISABLED}
   * or is a value > 0 and < {@link Integer#MAX_VALUE}.
   *
   * @see io.libraft.algorithm.RaftConstants#SNAPSHOTS_DISABLED
   * @see RaftSnapshotsConfiguration#getMinEntriesToSnapshot()
   * @see RaftSnapshotsConfiguration#setMinEntriesToSnapshot(int)
   *
   * @link http://docs.jboss.org/hibernate/validator/5.1/reference/en-US/html/validator-customconstraints.html
   */
  @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.ANNOTATION_TYPE})
  @Retention(RetentionPolicy.RUNTIME)
  @Constraint(validatedBy = MinEntriesToSnapshotValidator.class)
  @Documented
  public @interface MinEntriesToSnapshot {
  
      String message() default "{io.libraft.agent.configuration.MinEntriesToSnapshot.message}";
  
      Class<?>[] groups() default { };
  
      Class<? extends Payload>[] payload() default { };
  
      /**
       * Get the upper bound on the number of entries after which to snapshot.
       *
       * @return upper bound on the number of entries after which to snapshot
       */
      int ceil();
  
      /**
  	 * Defines several {@link MinEntriesToSnapshot} annotations on the same element.
  	 *
  	 * @see MinEntriesToSnapshot
  	 */
      @Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.ANNOTATION_TYPE})
      @Retention(RetentionPolicy.RUNTIME)
      @Documented
      @interface List {
  
          MinEntriesToSnapshot[] value();
      }
  }
  