content: /*
   * 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.bifromq.basekv.raft.exception;
  
  public class LeaderTransferException extends RuntimeException {
      protected LeaderTransferException(String message) {
          super(message);
      }
  
      public static LeaderNotReadyException leaderNotReady() {
          return new LeaderNotReadyException();
      }
  
      public static LeaderTransferException transferringInProgress() {
          return new TransferringInProgressException();
      }
  
      public static LeaderTransferException leaderStepDown() {
          return new LeaderStepDownException();
      }
      public static LeaderTransferException selfTransfer() {
          return new SelfTransferException();
      }
  
      public static LeaderTransferException stepDownByOther() {
          return new StepDownByOtherException();
      }
  
      public static LeaderTransferException notFoundOrQualified() {
          return new NotFoundOrQualifiedException();
      }
  
      public static LeaderTransferException transferTimeout() {
          return new TransferTimeoutException();
      }
  
      public static LeaderTransferException notLeader() {
          return new NotLeaderException();
      }
  
      public static LeaderTransferException noLeader() {
          return new NoLeaderException();
      }
  
      public static LeaderTransferException cancelled() {
          return new CancelledException();
      }
  
      public static class LeaderNotReadyException extends LeaderTransferException {
          private LeaderNotReadyException() {
              super("Leader has not been ready due to commit index of its term has not been confirmed");
          }
      }
  
      public static class TransferringInProgressException extends LeaderTransferException {
          private TransferringInProgressException() {
              super("There is transferring in progress");
          }
      }
  
      public static class SelfTransferException extends LeaderTransferException {
          private SelfTransferException() {
              super("Cannot transfer to self");
          }
      }
  
      public static class LeaderStepDownException extends LeaderTransferException {
          private LeaderStepDownException() {
              super("Leader step down before transfer finished");
          }
      }
  
      public static class StepDownByOtherException extends LeaderTransferException {
          private StepDownByOtherException() {
              super("Step down by another candidate");
          }
      }
  
      public static class NotFoundOrQualifiedException extends LeaderTransferException {
          private NotFoundOrQualifiedException() {
              super("Transferee not found or not qualified");
          }
      }
  
      public static class TransferTimeoutException extends LeaderTransferException {
          private TransferTimeoutException() {
              super("Cannot finish transfer within one election timeout");
          }
      }
  
      public static class NotLeaderException extends LeaderTransferException {
          private NotLeaderException() {
              super("Only leader can do transfer");
          }
      }
  
      public static class NoLeaderException extends LeaderTransferException {
          private NoLeaderException() {
              super("No leader elected");
          }
      }
  
      public static class CancelledException extends LeaderTransferException {
          private CancelledException() {
              super("Cancelled");
          }
      }
  }
  