content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * Licensed 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 io.activej.cube.exception;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  public final class StateFarAheadException extends Exception {
  	private final long startingRevision;
  	private final Set<Long> missingRevisions;
  
  	public StateFarAheadException(long startingRevision, Set<Long> missingRevisions) {
  		this.startingRevision = startingRevision;
  		this.missingRevisions = new HashSet<>(missingRevisions);
  	}
  
  	public long getStartingRevision() {
  		return startingRevision;
  	}
  
  	public Set<Long> getMissingRevisions() {
  		return Collections.unmodifiableSet(missingRevisions);
  	}
  
  	@Override
  	public String getMessage() {
  		return
  			"State is far ahead of starting revision " + startingRevision +
  			", missing revisions: " + missingRevisions;
  	}
  }
  