content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * 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
   *
   * https://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.aeron.cluster;
  
  import io.aeron.cluster.codecs.BackupQueryDecoder;
  import io.aeron.cluster.codecs.HeartbeatRequestDecoder;
  import io.aeron.cluster.codecs.MessageHeaderDecoder;
  import io.aeron.cluster.codecs.StandbySnapshotDecoder;
  import io.aeron.security.AuthorisationService;
  
  /**
   * An {@link AuthorisationService} that allows the actions required by Cluster Backup
   * and Aeron Cluster Standby.
   */
  public enum AllowBackupAndStandbyAuthorisationService implements AuthorisationService
  {
      /**
       * As there is no instance state then this object can be used to save on allocation.
       */
      INSTANCE;
  
      /**
       * {@inheritDoc}
       */
      public boolean isAuthorised(
          final int protocolId,
          final int actionId,
          final Object type,
          final byte[] encodedPrincipal)
      {
          return MessageHeaderDecoder.SCHEMA_ID == protocolId &&
              (BackupQueryDecoder.TEMPLATE_ID == actionId || HeartbeatRequestDecoder.TEMPLATE_ID == actionId ||
                  StandbySnapshotDecoder.TEMPLATE_ID == actionId);
      }
  }
  