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.cloudstack.ha;
  
  import com.cloud.ha.Investigator;
  import com.cloud.host.Host;
  import com.cloud.host.Status;
  import org.apache.cloudstack.framework.config.ConfigKey;
  import org.apache.cloudstack.ha.provider.HAProvider;
  
  public interface HAManager extends HAConfigManager {
  
      ConfigKey<Integer> MaxConcurrentHealthCheckOperations = new ConfigKey<>("Advanced", Integer.class,
              "ha.max.concurrent.health.check.operations",
              "50",
              "The number of concurrent health check operations per management server. This setting determines the size of the thread pool consuming the HEALTH CHECK queue.", true);
  
      ConfigKey<Integer> MaxPendingHealthCheckOperations = new ConfigKey<>("Advanced", Integer.class,
              "ha.max.pending.health.check.operations",
              "5000",
              "The number of pending health check operations per management server. This setting determines the size of the HEALTH CHECK queue.", true);
  
      ConfigKey<Integer> MaxConcurrentActivityCheckOperations = new ConfigKey<>("Advanced", Integer.class,
              "ha.max.concurrent.activity.check.operations",
              "25",
              "The number of concurrent activity check operations per management server. This setting determines the size of the thread pool consuming the ACTIVITY CHECK queue.",
              true);
  
      ConfigKey<Integer> MaxPendingActivityCheckOperations = new ConfigKey<>("Advanced", Integer.class,
              "ha.max.pending.activity.check.operations",
              "2500",
              "The number of pending activity check operations per management server. This setting determines the size of the size of the ACTIVITY CHECK queue.", true);
  
      ConfigKey<Integer> MaxConcurrentRecoveryOperations = new ConfigKey<>("Advanced", Integer.class,
              "ha.max.concurrent.recovery.operations",
              "25",
              "The number of concurrent recovery operations per management server.", true);
  
      ConfigKey<Integer> MaxPendingRecoveryOperations = new ConfigKey<>("Advanced", Integer.class,
              "ha.max.pending.recovery.operations",
              "2500",
              "The number of pending recovery operations per management server. This setting determines the size of the size of the RECOVERY queue.", true);
  
      ConfigKey<Integer> MaxConcurrentFenceOperations = new ConfigKey<>("Advanced", Integer.class,
              "ha.max.concurrent.fence.operations",
              "25",
              "The number of concurrent fence operations per management server.", true);
  
      ConfigKey<Integer> MaxPendingFenceOperations = new ConfigKey<>("Advanced", Integer.class,
              "ha.max.pending.fence.operations",
              "2500",
              "The number of pending fence operations per management server. This setting determines the size of the size of the FENCE queue.", true);
  
      boolean transitionHAState(final HAConfig.Event event, final HAConfig haConfig);
      HAProvider getHAProvider(final String name);
      HAResourceCounter getHACounter(final Long resourceId, final HAResource.ResourceType resourceType);
      void purgeHACounter(final Long resourceId, final HAResource.ResourceType resourceType);
  
      boolean isHAEligible(final HAResource resource);
      Boolean isVMAliveOnHost(final Host host) throws Investigator.UnknownVM;
      Status getHostStatus(final Host host);
  }
  