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Server functionality for HBase

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/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hbase.util;

import org.apache.hadoop.hbase.classification.InterfaceAudience;

/**
 * Similar interface as {@link org.apache.hadoop.util.Progressable} but returns
 * a boolean to support canceling the operation.
 * 
 * Used for doing updating of OPENING znode during log replay on region open.
 */
@InterfaceAudience.Private
public interface CancelableProgressable {

  /**
   * Report progress.  Returns true if operations should continue, false if the
   * operation should be canceled and rolled back.
   * @return whether to continue (true) or cancel (false) the operation
   */
  boolean progress();

}